question_answer 1) A block of metal weighing 2 kg is resting on a frictionless plane. It is strucked by a jet releasing. Water at a rate of 1 kg/s and at a speed of 5 m/s. The initial acceleration of the block will be
A)
\[2.5\,m/{{s}^{2}}\]
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B)
\[5.0\,m/{{s}^{2}}\]
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C)
\[10\,m/{{s}^{2}}\]
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D)
none of these
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question_answer 2) A body of mass 2 kg is being dragged with uniform velocity of 2 m/s on a rough horizontal plane. The coefficient of friction between the body and the surface is 0.20. The amount of heat generated in 5 s is V = 4.2 J/cal and \[g=9.8\,m/{{s}^{2}}\])
A)
9.33 cal
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B)
10.21 cal
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C)
12.67 cal
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D)
13.34 cal
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question_answer 3) From an automatic gun a man fires 360 bullet per minute with a speed of 360 km/h. If each weighs 20g, the power of the gun is
A)
600 W
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B)
300 W
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C)
150 W
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D)
75 W
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question_answer 4) An annular ring with inner and outer radii \[{{R}_{1}}\] and \[{{R}_{2}}\]is rolling without slippling with a uniform angular speed. The ratio of the forces experienced by the two particles situated on the inner and outer parts of the ring, \[\frac{{{F}_{1}}}{{{F}_{2}}}\]is
A)
1
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B)
\[\left( \frac{{{R}_{1}}}{{{R}_{2}}} \right)\]
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C)
\[\frac{{{R}_{2}}}{{{R}_{1}}}\]
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D)
\[{{\left( \frac{{{R}_{1}}}{{{R}_{2}}} \right)}^{2}}\]
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question_answer 5) A rubber cord catapult has cross-sectional area \[25\,m{{m}^{2}}\] and initial length of rubber cord is 10 cm. It is stretched to 5 cm and then released to project a missile of mass 5 g. Taking \[{{Y}_{rubber}}\,=5\times {{10}^{8}}\,N/{{m}^{2}}\]. Velocity of projected missile is
A)
\[20\,m/{{s}^{-1}}\]
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B)
\[100\,m/{{s}^{-1}}\]
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C)
\[250\,m/{{s}^{-1}}\]
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D)
\[200\,m/{{s}^{-1}}\]
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question_answer 6) If the work done in blowing a bubble of volume V is W then the work done in blowing bubble of volume 2 V from the same soap solution will be
A)
W/2
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B)
\[\sqrt{\text{2}}\,\text{W}\]
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C)
\[\sqrt[\text{3}]{\text{2}}\,\text{W}\]
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D)
\[\sqrt[\text{3}]{\text{4}}\,\text{W}\]
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question_answer 7) 540 g of ice of \[0{}^\circ C\] is mixed with 540 g of water at \[80{}^\circ C\]. The final temperature of the mixture is
A)
\[0{}^\circ C\]
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B)
\[40{}^\circ C\]
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C)
\[80{}^\circ C\]
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D)
less than \[0{}^\circ C\]
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question_answer 8)
The coefficient of thermal conductivity of copper is 9 times that of steel. In the composite cylindrical bar shown in the figure, what will be the temperature at the junction of copper and steel?
A)
\[75{}^\circ C\]
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B)
\[67{}^\circ C\]
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C)
\[33{}^\circ C\]
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D)
\[25{}^\circ C\]
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question_answer 9) In order to double the frequency of the fundamental note emitted by a stretched string, the length is reduced to\[\frac{\text{3}}{\text{4}}\text{th}\] of the original length and the tension is changed. The factor by which the tension is to be changed is
A)
\[\frac{\text{3}}{8}\]
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B)
\[\frac{2}{3}\]
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C)
\[\frac{8}{9}\]
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D)
\[\frac{9}{4}\]
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question_answer 10) A \[\text{10}\,\text{F}\] capacitor is charged to a potential difference of 1000 V. The terminals of the charged capacitor are disconnected from the power supply and connected to the terminals of an uncharged 6uF capacitor. What is the final potential difference across each capacitor?
A)
167 V
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B)
100 V
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C)
625 V
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D)
250 V
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question_answer 11)
In the circuit shown in figure, switch S; is initially closed and \[{{S}_{2}}\] is open. Find \[{{V}_{a}}-{{V}_{b.}}\].
A)
4 V
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B)
8 V
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C)
12 V
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D)
16 V
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question_answer 12) Two bulbs consume same power when operated at 200V and 300V respectively. When these bulbs are connected in series across a DC source of 500 V, then
A)
ratio of potential differences across them is 3/2
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B)
ratio of potential differences across them is 9/4
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C)
ratio of powers consumed across them is 4/9
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D)
ratio of powers consumed across them is 2/3
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question_answer 13) Two magnets are held together in a vibration magnetometer and are allowed to oscillate in the earths magnetic field with like poles together, 12 oscillations per minute are made but for unlike poles together only 4 oscillations per minute are executed. The ratio of their magnetic moments is
A)
3 : 1
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B)
1 : 3
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C)
3 : 5
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D)
5 : 4
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question_answer 14) The molar heat capacity in a process of a diatomic gas if it does a work of \[\frac{Q}{4},\]when a heat of Q is supplied to it is
A)
\[\frac{2}{5}R\]
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B)
\[\frac{5}{2}R\]
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C)
\[\frac{10}{3}R\]
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D)
\[\frac{6}{7}R\]
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question_answer 15) The dimensions of \[\frac{a}{b}\]in the equation\[P=\frac{a-{{t}^{2}}}{bx},\] where p is pressure, x is distance and t is time, are
A)
\[[M{{T}^{-2}}]\]
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B)
\[[{{M}^{2}}{{T}^{-3}}]\]
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C)
\[[M{{L}^{3}}{{T}^{-1}}]\]
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D)
\[[L{{T}^{-3}}]\]
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question_answer 16) Dimensions of \[\frac{1}{{{\mu }_{0}}{{\varepsilon }_{0}}},\]where symbols have their usual meanings are
A)
\[[L{{T}^{-1}}]\]
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B)
\[[{{L}^{-1}}T]\]
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C)
\[[{{L}^{-}}^{2}{{T}^{2}}]\]
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D)
\[[{{L}^{2}}{{T}^{-2}}]\]
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question_answer 17) A body is projected vertically up with a velocity v and after some time it returns to the point from which it was projected. The average velocity and average speed of the body for the total time of flight are
A)
\[\frac{{\mathbf{\vec{v}}}}{2}and\frac{v}{2}\]
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B)
\[0\,and\frac{v}{2}\]
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C)
0 and 0
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D)
\[\frac{{\mathbf{\vec{v}}}}{2}and\,0\]
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question_answer 18) A sphere of mass m is tied to end of a string of length\[l\]and rotated through the other end along a horizontal circular path with speed v. The work done in full horizontal circle is
A)
zero
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B)
\[\left( \frac{m{{v}^{2}}}{l} \right)2\pi l\]
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C)
\[mg.\,2\pi l\]
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D)
\[\left( \frac{m{{v}^{2}}}{l} \right)(l)\]
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question_answer 19) For a body moving in a circular path, a condition for no skidding if\[\mu \] is the coefficient of friction, is
A)
\[\frac{m{{v}^{2}}}{r}\le \mu mg\]
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B)
\[\frac{m{{v}^{2}}}{r}\ge \mu mg\]
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C)
\[\frac{v}{r}=\mu g\]
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D)
\[\frac{m{{v}^{2}}}{r}=\mu mg\]
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question_answer 20) A car is moving with a uniform speed on a level road. Inside the car there is a balloon filled with helium and attached to a piece of string tied to the floor. The string is observed to be vertical. The car now takes a left turn maintaining the speed on the level road. The balloon in the car will
A)
continue to remain vertical
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B)
burst while taking the curve
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C)
be thrown to the right side
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D)
be thrown to the left side
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question_answer 21) Two balls of masses \[{{m}_{1}}\] and\[{{m}_{2}}\] are separated from each other by a powder charge placed between them. The whole system is at rest on the ground. Suddenly the powder charge explodes and masses are pushed apart. The mass\[{{m}_{1}}\]travels a distance \[{{S}_{1}}\] and stops. If the coefficients of friction between the balls and ground are same, the mass \[{{m}_{2}}\]stops after travelling the distance
A)
\[{{s}_{2}}=\frac{{{m}_{1}}}{{{m}_{2}}}{{s}_{1}}\]
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B)
\[{{s}_{2}}=\frac{{{m}_{2}}}{{{m}_{1}}}{{s}_{1}}\]
done
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C)
\[{{s}_{2}}=\frac{{{m}_{1}}}{m_{2}^{2}}{{s}_{1}}\]
done
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D)
\[{{s}_{2}}=\frac{m_{2}^{1}}{m_{1}^{2}}{{s}_{1}}\]
done
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question_answer 22) A cricket ball of mass 250 g collides with a bat with velocity 10 m/s and returns with the same velocity within 0.01 s. The force acted on bat is
A)
25 N
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B)
50 N
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C)
250 N
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D)
500 N
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question_answer 23) When a spring is stretched by 2 cm, it stores 100 J of energy. If it is stretched further by 2 cm, the stored energy will be increased by
A)
100 J
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B)
200 J
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C)
300 J
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D)
400 J
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question_answer 24) The kinetic energy of a body decreases by 36%. The decrease in the momentum is
A)
36%
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B)
20%
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C)
8%
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D)
6%
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question_answer 25) A wheel has a speed of 1200 revolutions per minute and is made to slow down at a rate of 4 radians/s2.The number of revolutions it makes before coming to rest is
A)
143
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B)
272
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C)
314
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D)
722
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question_answer 26) When a uniform solid sphere and a disc of the same mass and of the same radius rolls down an inclined smooth plane from rest to the same distance, then the ratio of the time taken by them is
A)
15 : 14
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B)
\[{{15}^{2}}:{{14}^{2}}\]
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C)
\[\sqrt{14}:\sqrt{15}\]
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D)
14 : 15
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question_answer 27) The diameters of two planets are in the ratio 4 : 1 and their mean densities in the ratio 1 : 2. The acceleration due to gravity on the planets will be in ratio
A)
1 : 2
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B)
2 : 3
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C)
2 : 1
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D)
4 : 1
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question_answer 28) At the surface of a certain planet, acceleration due to gravity is one-quarter of that on earth. If a brass ball is transported to this planet, then which one of the following statements is not correct?
A)
The mass of the brass ball on this planet is a quarter of its mass as measured on earth
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B)
The weight of the brass ball on this planet is a quarter of the weight as measured on earth
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C)
The brass ball has the same mass on the planet as on earth
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D)
The brass ball has the same volume on the other planet as on earth
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question_answer 29) A clock S is based on oscillation of a spring and a clock P based on pendulum motion. Both clocks run at the same rate on earth. On a planet having the same density as earth but twice the radius
A)
S will run faster than P
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B)
P will run faster than S
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C)
they will both run at the same rate as on the earth
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D)
None of the above
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question_answer 30) At a given place where acceleration due to gravity is \[g\,m/{{s}^{2}},\] a sphere of lead of density \[d\,kg/{{m}^{3}}\] is getting released in a column of liquid of density\[\text{ }\!\!\!\!\text{ }\text{ }\!\!\!\!\text{ }\] \[kg\,/{{m}^{3}}\]. If \[d>\rho ,\] the sphere will
A)
fall vertically with an acceleration \[g\,m/{{s}^{2}}\]
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B)
fall vertically with no acceleration
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C)
fall vertically with an acceleration\[\left( \frac{d-\rho }{d} \right)\]
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D)
fall vertically with an acceleration\[\left( \frac{\rho }{d} \right)\]
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question_answer 31) The diameter of a brass rod is 4 mm and Youngs modulus of brass is \[9\times {{10}^{10}}\,N/{{m}^{2}}\]. The force required to stretch by 0.1% of its length is
A)
\[360\,\pi N\]
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B)
36 N
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C)
\[144\pi \times {{10}^{3}}N\]
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D)
\[36\pi \times {{10}^{5}}N\]
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question_answer 32) A ball falling in a lake of depth 200m shows 0.1% decrease in its volume at the bottom. What is the bulk modulus of the material of the ball
A)
\[19.6\,\times {{10}^{8}}\,N/{{m}^{2}}\]
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B)
\[19.6\,\times {{10}^{-10}}\,N/{{m}^{2}}\]
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C)
\[19.6\,\times {{10}^{10}}N/{{m}^{2}}\]
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D)
\[19.6\,\times {{10}^{-8}}\,N/{{m}^{2}}\]
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question_answer 33) If one end of a wire is fixed with a rigid support and the other end is stretched by a force of 10 N, then the increase in length is 0.5 mm. The ratio of the energy of the wire and the work done in displacing it through 1.5 mm by the weight is
A)
\[\frac{1}{3}\]
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B)
\[\frac{1}{4}\]
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C)
\[\frac{1}{2}\]
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D)
1
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question_answer 34) The increase in length on stretching a wire is 0.05%. If its Poissons ratio is 0.4, then its diameter will be
A)
reduced by 0.02%
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B)
reduced by 0.1%
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C)
increased by 0.02%
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D)
decreased by 0.4%
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question_answer 35) Work done in splitting a drop of water of 1 mm radius into 10 droplets is (surface tension of water \[=72\,\times {{10}^{-3}}J/{{m}^{2}}\])
A)
\[9.58\,\times {{10}^{-5}}J\]
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B)
\[8.95\,\times {{10}^{-5}}J\]
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C)
\[5.89\,\times {{10}^{-5}}J\]
done
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D)
\[5.98\,\times {{10}^{-6}}J\]
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question_answer 36) Water rises to a height of 16.3 cm in a capillary tube of height 18 cm above the water level. If the tube is cut at a height of 12 cm, then
A)
water will come as a fountain from the capillary tube
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B)
water will stay at a height of 12 cm in the capillary tube
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C)
the height of the water in the capillary tube will be 10.3 cm
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D)
water will flow down the sides of the capillary tube
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question_answer 37) Two bodies are in equilibrium when suspended in water from the arms of a balance. The mass of one body is 36 g and its density is \[9\,g/c{{m}^{3}}\]. If the mass of the other is 48 g, its density in \[g/c{{m}^{3}}\] is
A)
\[\frac{4}{3}\]
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B)
\[\frac{3}{2}\]
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C)
3
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D)
5
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question_answer 38) The fraction of a floating object of volume\[{{V}_{0}}\] and density\[{{d}_{0}}\]above the surface of liquid of density\[d\] will be
A)
\[\frac{{{d}_{0}}}{d}\]
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B)
\[\frac{d{{d}_{0}}}{d+{{d}_{0}}}\]
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C)
\[\frac{d-{{d}_{0}}}{d}\]
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D)
\[\frac{d{{d}_{0}}}{d-{{d}_{0}}}\]
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question_answer 39) A constant pressure air thermometer gave a reading of 47.5 units of volume when immersed in ice cold water, and 67 units in a boiling liquid. The boiling point of the liquid will be
A)
\[135{}^\circ C\]
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B)
\[125{}^\circ C\]
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C)
\[112{}^\circ C\]
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D)
\[100{}^\circ C\]
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question_answer 40) A breaker is completely filled with water at \[4{}^\circ C\]. It will overflow if
A)
heated above \[4{}^\circ C\]
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B)
cooled below \[4{}^\circ C\]
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C)
both heated and cooled above and below \[4{}^\circ C\] respectively
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D)
None of the above
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question_answer 41) The following sets of values for\[{{C}_{V}}\]and \[{{C}_{P}}\] of a gas has been reported by different students. The units are cal/g-mol-K. Which of these sets is most reliable?
A)
\[{{C}_{V}}=3,\,{{C}_{p}}=5\]
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B)
\[{{C}_{V}}=4,\,{{C}_{p}}=6\]
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C)
\[{{C}_{V}}=3,\,{{C}_{p}}=2\]
done
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D)
\[{{C}_{V}}=3,\,{{C}_{p}}=4.2\]
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question_answer 42) A cylinder of capacity 20 L is filled with H2 gas. The total average kinetic energy of translator motion of its molecules is \[1.5\,\times {{10}^{5}}J\]. The pressure of hydrogen in the cylinder is
A)
\[2\times {{10}^{6}}\,N/{{m}^{2}}\]
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B)
\[3\times {{10}^{6}}\,N/{{m}^{2}}\]
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C)
\[4\times {{10}^{6}}\,N/{{m}^{2}}\]
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D)
\[5\times {{10}^{6}}\,N/m\]
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question_answer 43) An engineer claims to have made an engine delivering 10 kW power with fuel consumption of 1 g/s. The calorific value of the fuel is 2 kcal/g. The claim of the engineer is
A)
valid
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B)
invalid
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C)
depends on engine design
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D)
depends of the load
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question_answer 44) Find the change in the entropy in the following process 100 gm of ice at \[0{}^\circ C\] melts when dropped in a bucket of water at \[50{}^\circ C\]. (Assume temperature of water does not change)
A)
- 4.5 cal/K
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B)
+ 4.5 cal/K
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C)
+ 5.4 cal/K
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D)
- 5.4 cal /K
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question_answer 45) A cylinder of fixed capacity 44.8 L contains a monoatomic gas at standard temperature and pressure. The amount of heat required to raise the temperature of cylinder by \[10{}^\circ C\] will be (R = universal gas constant)
A)
R
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B)
10 R
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C)
20 R
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D)
30 R
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question_answer 46) Two spheres of different materials one with double the radius and one-fourth with thickness of the other, are filled with ice. If the time taken for complete melting of ice in the large radius one is 25 min and that for smaller one is 16 min, the ratio of thermal conductivities of the materials of larger sphere to the smaller sphere is
A)
4 : 5
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B)
5 : 4
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C)
25 : 1
done
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D)
1 : 25
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question_answer 47) An ideal black body at room temperature is thrown into a furnace. It is observed that
A)
initially, it is the darkest body and at later times the brightest
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B)
it is the darkest body at all times
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C)
it cannot be distinguished at all times
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D)
initially, it is the darkest body and at later times it cannot be distinguished
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question_answer 48) An emf of 100 mV is induced in a coil when the current in another nearby coil becomes 10 A from zero in 0.1 s. The coefficient of mutual induction between the two coils will be
A)
1 mH
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B)
10 mH
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C)
100 mH
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D)
1000 mH
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question_answer 49) In an L-R circuit, time constant is that time in which current grows from zero to the value (where \[{{I}_{0}}\]is the steady state current)
A)
0.63\[{{I}_{0}}\]
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B)
0.50\[{{I}_{0}}\]
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C)
0.37 \[{{I}_{0}}\]
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D)
\[{{I}_{0}}\]
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question_answer 50) The horizontal component of .the earths magnetic field at a place is \[3\times {{10}^{-4}}T\] and the dip is \[{{\tan }^{-1}}\left( \frac{4}{3} \right).\] A metal rod of length 0.25 m placed in the north-south position and is moved at a constant speed of 10 cm/s towards the east. The emf induced in the rod will be
A)
zero
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B)
\[1\,\mu V\]
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C)
\[5\,\mu V\]
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D)
\[10\,\mu V\]
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question_answer 51) In \[\text{L-C-R}\] circuit, \[\text{R=100}\,\Omega \] When capacitance C is removed, the current lags behind the voltage by\[\frac{\pi }{3}.\] When inductance L is removed, the current leads the voltage by \[\frac{\pi }{3}.\]The impedance of the circuit is
A)
\[50\,\Omega \]
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B)
\[100\,\Omega \]
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C)
\[200\,\Omega \]
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D)
\[400\,\Omega \]
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question_answer 52) If 10000 V is applied across an X-ray tube, what will be the ratio of de-Broglie wavelength of the incident electrons to the shortest wavelength of X-ray produced? (e/m for electron is \[1.8\,\times {{10}^{11}}Ck{{g}^{-1}}\])
A)
1
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B)
0.1
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C)
0.2
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D)
0.3
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question_answer 53) An electron is accelerated through a potential difference of 1000 V. Its velocity is nearly
A)
\[3.8\,\times {{10}^{7}}m/s\]
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B)
\[\text{1}\text{.9 }\!\!\times\!\!\text{ 1}{{\text{0}}^{6}}\text{m/s}\]
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C)
\[\text{1}\text{.9 }\!\!\times\!\!\text{ 1}{{\text{0}}^{7}}\text{m/s}\]
done
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D)
\[\text{5}\text{.7 }\!\!\times\!\!\text{ 1}{{\text{0}}^{7}}\text{m/s}\]
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question_answer 54) A photon, an electron and uranium nucleus all have the same wavelength. The one with the most energy
A)
is the photon
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B)
is the electron
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C)
is the uranium nucleus
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D)
depends upon the wavelength and the properties of the particle
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question_answer 55) Which of the following statements is not correct?
A)
Photographic plates are sensitive to infrared rays
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B)
Photographic plates are sensitive to ultraviolet rays
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C)
Infra red rays are invisible but can cast shadows like visible light
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D)
Infrared photons have more energy than photons of visible light
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question_answer 56) Assuming photoemission to take place, the factor by which the maximum velocity of the emitted photoelectrons changes when the wavelength of the incident radiation is increased four times, is
A)
4
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B)
\[\frac{1}{4}\]
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C)
2
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D)
\[\frac{1}{2}\]
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question_answer 57) 57. A nucleus\[z{{X}^{A}}\] emits 9 \[\alpha -\]-particles and 5 \[\beta \]-particles. The ratio of total protons and neutrons in the final nucleus is
A)
\[\frac{Z-13}{(A-Z-23)}\]
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B)
\[\frac{Z-18}{(A-36)}\]
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C)
\[\frac{Z-13}{(A-36)}\]
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D)
\[\frac{Z-13}{(A-Z-13)}\]
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question_answer 58) If\[{{t}_{1/2}}\]is the half-life of a substance then\[{{t}_{3/4}}\]is the time in which substance
A)
decays\[\frac{\text{3}}{\text{4}}\text{th}\]
done
clear
B)
remains\[\frac{\text{3}}{\text{4}}\text{th}\]
done
clear
C)
decays\[\frac{1}{2}\text{th}\]
done
clear
D)
remains\[\frac{1}{2}\text{th}\]
done
clear
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question_answer 59) An AC source of angular frequency \[\omega \] is fed across a resistor rand a capacitor C in series. The current registered is \[i.\] If now the frequency of source is changed to\[\omega /3\] (but maintaining the same voltage), the current in the circuit is found to be halved. Calculate the ratio of reactance to resistance at the original frequency\[\omega \].
A)
\[\sqrt{\frac{3}{5}}\]
done
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B)
\[\sqrt{\frac{2}{5}}\]
done
clear
C)
\[\sqrt{\frac{1}{5}}\]
done
clear
D)
\[\sqrt{\frac{4}{5}}\]
done
clear
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question_answer 60) Susceptibility of Mg at 300 K is \[1.2\,\times {{10}^{-5}}\]. The temperature at which susceptibility will be \[1.8\,\times {{10}^{-5}}\] is
A)
450 K
done
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B)
200 K
done
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C)
375 K
done
clear
D)
None of these
done
clear
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question_answer 61) In transistor, forward bias is always smaller than the reverse bias. The correct reason is
A)
to avoid excessive heating of transistor
done
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B)
to maintain a constant base current
done
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C)
to produce large voltage gain
done
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D)
None of the above
done
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question_answer 62) In the Boolean algebra \[\overline{(\overline{A.}\overline{B}).}\] A equals to
A)
\[\overline{A+B}\]
done
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B)
A
done
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C)
A.B
done
clear
D)
A + B
done
clear
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question_answer 63) The maximum peak to peak voltage of an AM wire is 24 mV and the minimum peak to peak voltage is 8 mV. The modulation factor is
A)
10%
done
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B)
20%
done
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C)
25%
done
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D)
50%
done
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question_answer 64) The focal length of objective lens and eyelens of a microscope are 4 cm and 8 cm respectively. If the least distance of distinct vision is 24 cm and object distance is 4.5 cm from the objective lens, then the magnifying power of the microscope will be
A)
18
done
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B)
32
done
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C)
64
done
clear
D)
20
done
clear
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question_answer 65) When the length of a microscope tube increases, its magnifying power
A)
decreases
done
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B)
increases
done
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C)
does not change
done
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D)
may decrease or increase
done
clear
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question_answer 66) On a rainy day, a small oil film on water show brilliant colours. This is due to
A)
dispersion of light
done
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B)
interference of light
done
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C)
absorption of light
done
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D)
scattering of light
done
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question_answer 67) Two waves having intensities in the ratio 25 : 4 produce interference. The ratio of the maximum to the minimum intensities is
A)
5 : 2
done
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B)
7 : 3
done
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C)
49 : 9
done
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D)
9 : 49
done
clear
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question_answer 68) A Carnot engine whose low temperature reservoir is at \[7{}^\circ C\] has an efficiency of 50%. It is desired to increase the efficiency to 70%. By how many degrees should the temperature of the high temperature reservoir be increased?
A)
840 K
done
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B)
280 K
done
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C)
560 K
done
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D)
373 K
done
clear
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question_answer 69)
Two long straight wires are set parallel to each other. Each carries a current; in the same direction and the separation between them is 2r. The intensity of the magnetic field midway between them is
A)
\[\frac{{{\mu }_{0i}}}{r}\]
done
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B)
\[\frac{4{{\mu }_{0i}}}{r}\]
done
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C)
zero
done
clear
D)
\[\frac{{{\mu }_{0i}}}{4r}\]
done
clear
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question_answer 70) In hydrogen atom, an electron is revolving in the orbit of radius \[0.53\,\overset{\text{o}}{\mathop{\text{A}}}\,\] with \[6.6\,\times {{10}^{15}}\] rotation/s. Magnetic field produced at the centre of the orbit is
A)
\[0.125\,Wb/{{m}^{2}}\]
done
clear
B)
\[1.25\,Wb/{{m}^{2}}\]
done
clear
C)
\[12.5\,Wb/{{m}^{2}}\]
done
clear
D)
\[125\,\,Wb/{{m}^{2}}\]
done
clear
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question_answer 71) An electric bulb illuminates a plane surface. The intensity of illumination on the surface at the point 2m away from the bulb is \[5\times {{10}^{-4}}\] phot (lumen/\[c{{m}^{2}}\]). The line joining the bulb to the paint makes an angle of \[60{}^\circ \] with the normal to the surface. The intensity of the bulb in candela is
A)
\[40\sqrt{3}\]
done
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B)
40
done
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C)
20
done
clear
D)
\[40\times {{10}^{-7}}\]
done
clear
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question_answer 72)
Two batteries of emfs 4 V and 8 V with internal resistances \[1\,\Omega \] and\[2\,\Omega \] are connected in a circuit with a resistance of \[9\,\Omega \]as shown in figure. The current and potential difference between the points P and Q are
A)
\[\frac{\text{1}}{\text{2}}\text{A}\,\text{and}\,\text{3}\,\text{V}\]
done
clear
B)
\[\frac{\text{1}}{6}\text{A}\,\text{and}\,4\,\text{V}\]
done
clear
C)
\[\frac{\text{1}}{9}\text{A}\,\text{and}\,9\,\text{V}\]
done
clear
D)
\[\frac{\text{1}}{2}\text{A}\,\text{and}\,12\,\text{V}\]
done
clear
View Answer play_arrow
question_answer 73) The energy required to accelerate a car from 10 m/s to 20 m/s is how many times the energy required to accelerate the car from rest to 10 m/s?
A)
Equal
done
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B)
4 times
done
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C)
2 times
done
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D)
3 times
done
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View Answer play_arrow
question_answer 74) A cell of internal resistance\[1.5\Omega \] and ofemfl.5V balances 500 cm on a potentiometer wire. If a wire of\[15\Omega \] is connected between the balance point and the cell, then the balance point will shift
A)
to zero
done
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B)
by 500 cm
done
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C)
by 750 cm
done
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D)
None of these
done
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question_answer 75) The colour sequence in a carbon resistor is red, brown, orange and silver. The resistance of the resistor is
A)
\[21\times {{10}^{3}}\pm \,10%\]
done
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B)
\[23\times {{10}^{1}}\pm \,10%\]
done
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C)
\[21\times {{10}^{3}}\pm \,10%\]
done
clear
D)
\[12\times {{10}^{3}}\pm \,5%\]
done
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question_answer 76) A moving coil galvanometer has a resistance of \[50\Omega \] and gives full scale deflection for 10 mA. How could it be converted into an ammeter with a full scale deflection for 1 A?
A)
\[50/99\,\Omega \] in series
done
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B)
\[50/99\,\Omega \] in parallel
done
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C)
\[0.01\,\Omega \] in series
done
clear
D)
\[0.01\,\Omega \] in parallel
done
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question_answer 77) The moment of inertia of a body about a given axis is \[2.4\,\,kg-{{m}^{2}}\]. To produce a rotational kinetic energy of 750 J, an angular acceleration of \[5\,rad/{{s}^{2}}\] must be applied about that axis for
A)
6 s
done
clear
B)
5 s
done
clear
C)
4 s
done
clear
D)
3 s
done
clear
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question_answer 78) A conducting sphere of radius R, and carrying a charge q is joined to a conducting sphere of radius 2R, and carrying a charge - 2q. The charge flowing between them will be
A)
\[-\frac{q}{3}\]
done
clear
B)
\[\frac{2q}{3}\]
done
clear
C)
\[q\]
done
clear
D)
\[\frac{4q}{3}\]
done
clear
View Answer play_arrow
question_answer 79) The potential at a point due to an electron dipole will be maximum and minimum when the angles between the axis of the dipole and the line joining the point to the dipole are respectively
A)
\[90{}^\circ \text{ }and\text{ }180{}^\circ \]
done
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B)
\[0{}^\circ \text{ }and\text{ }90{}^\circ \]
done
clear
C)
\[90{}^\circ \text{ }and\text{ }0{}^\circ \]
done
clear
D)
\[0{}^\circ \text{ }and\text{ }180{}^\circ \]
done
clear
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question_answer 80) On all the six surfaces of a unit cube, equal tensile force of F is applied. The increase in length of each side will be (Y = Youngs modulus, \[\rho \]= Poissions ratio)
A)
\[\frac{F}{Y(1-\sigma )}\]
done
clear
B)
\[\frac{F}{Y(1+\sigma )}\]
done
clear
C)
\[\frac{F(1-2\sigma )}{Y}\]
done
clear
D)
\[\frac{F}{Y(1+2\sigma )}\]
done
clear
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question_answer 81) If the tension on a wire is removed at once, then
A)
it will break
done
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B)
its temperature will reduce
done
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C)
there will be no change in its temperature
done
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D)
its temperature increases
done
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question_answer 82) The electric field due to an electric dipole at a distance r from its centre in axial position is E. If the dipole is rotated through an angle of \[90{}^\circ \] about its perpendicular axis, the electric field at the same point will be
A)
E
done
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B)
\[\frac{E}{4}\]
done
clear
C)
\[\frac{E}{2}\]
done
clear
D)
\[2E\]
done
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question_answer 83) Among the following properties describing diamagnetism, identify the property that is wrongly stated.
A)
Diamagnetic materials do not have permanent magnetic moment
done
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B)
Diamagnetism is explained in terms of electromagnetic induction
done
clear
C)
Diamagnetic materials have a small positive susceptibility
done
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D)
The magnetic moment of individual electrons neutralize each other
done
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question_answer 84) Stars are not visible in the day time because
A)
stars hide behind the sun
done
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B)
stars do not reflect sunrays during day
done
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C)
stars vanish during the day
done
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D)
atmosphere scatters sunlight into a blanket of extreme brightness through which faint stars cannot be visible
done
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question_answer 85) If pressure at half the depth of a lake is equal to 2/3 pressure at the bottom of the lake then what is the depth of the lake?
A)
10 m
done
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B)
20 m
done
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C)
60 m
done
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D)
30 m
done
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question_answer 86) The mass of the moon is\[\frac{1}{81}\] of the earth but its gravitational pull is\[\frac{1}{6}\]of the earth. It is due to the fact that
A)
the radius of the moon is \[\frac{81}{6}\]of the earth
done
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B)
the radius of the earth is \[\frac{9}{\sqrt{6}}\]of the moon
done
clear
C)
moon is the satellite of the earth
done
clear
D)
None of the above
done
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View Answer play_arrow
question_answer 87) A moving coil galvanometer has 48 turns and area of coil is \[4\times {{10}^{-2}}{{m}^{2}}\]. If the magnetic field is 0.2 T, then to increase the current sensitivity by 25% without changing area (A) and field (B) the number of turns should become
A)
24
done
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B)
36
done
clear
C)
60
done
clear
D)
54
done
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question_answer 88) A magnet is parallel to a uniform magnetic field. If it is rotated by \[60{}^\circ \], the work done is 0.8 J. How much work is done in moving it \[30{}^\circ \] further?
A)
\[\text{0}\text{.8 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{7}}}\,\text{erg}\]
done
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B)
4.0 J
done
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C)
8 J
done
clear
D)
0.8 erg
done
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View Answer play_arrow
question_answer 89) An electric dipole is put in north-south direction in a sphere filled with water. Which of the following statements is correct?
A)
Electric flux is coming towards sphere
done
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B)
Electric flux is coming out of sphere
done
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C)
Electric flux entering into sphere and leaving the sphere are same
done
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D)
Water does not permit electric flux to enter into sphere
done
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question_answer 90) The plates of parallel plate capacitor are charged upto 100V. A 2 mm thick plate is inserted between the plates. Then to maintain the same potential difference, the distance between the plates is increased by 1.6 mm. The dielectric constant of the plate is
A)
5
done
clear
B)
1.25
done
clear
C)
4
done
clear
D)
2.5
done
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question_answer 91) The root mean square speed of hydrogen molecules of an ideal hydrogen gas kept in a gas chamber at \[0{}^\circ C\] is 3180 m/s. The pressure on the hydrogen gas is (density of hydrogen gas is \[8.99\,\times {{10}^{-2}}kg/{{m}^{3}},\] atmosphere \[=1.01\,\times {{10}^{5}}\,N/{{m}^{2}}\])
A)
1.0 atm
done
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B)
1.5 atm
done
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C)
2.0 atm
done
clear
D)
3.0 atm
done
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question_answer 92) Which of the following is the disadvantage of FM over AM?
A)
Larger band width requirement
done
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B)
Larger noise
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C)
Higher modulation power
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D)
Low efficiency
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question_answer 93)
In the adjoining figure, four capacitors are shown with their respective capacities and the PD applied. The charge and the PD across the \[4\mu F\] capacitor will be
A)
\[600\,\mu C;\,150\,V\]
done
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B)
\[300\,\mu C;\,75\,V\]
done
clear
C)
\[800\,\mu C;\,200V\]
done
clear
D)
\[580\,\mu C;\,145V\]
done
clear
View Answer play_arrow
question_answer 94) What is the angle between the electric dipole moment and the electric field strength due to it on the equatorial line?
A)
\[0{}^\circ \]
done
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B)
\[90{}^\circ \]
done
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C)
\[180{}^\circ \]
done
clear
D)
None of these
done
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question_answer 95) An electron microscope is superior to an optical microscope in
A)
having better resolving power
done
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B)
being easy to handle
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C)
low cost
done
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D)
quickness of observation
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question_answer 96) An L-C-R series circuit with a resistance of 100 ft is connected to an AC source of 200 V and angular frequency 300 rad/s. When only the capacitor is removed, the current lags behind the voltage by \[60{}^\circ \]. When only the inductor is removed the current leads the voltage by \[60{}^\circ \] The average power dissipated is
A)
50 W
done
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B)
100 W
done
clear
C)
200 W
done
clear
D)
400 W
done
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question_answer 97) How much work must be done to pull apart the electron and the proton that make up the hydrogen atom, if the atom is initially in the state with n = 2?
A)
\[\text{13}\text{.6 }\!\!\times\!\!\text{ 1}\text{.6 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-19}}}\text{J}\]
done
clear
B)
\[\text{3}\text{.6 }\!\!\times\!\!\text{ 1}\text{.6 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-19}}}\text{J}\]
done
clear
C)
\[\text{1}\text{.51 }\!\!\times\!\!\text{ 1}\text{.6 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-19}}}\text{J}\]
done
clear
D)
zero
done
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question_answer 98) If the current 3 A flowing in the primary coil ii made zero in 0.1 s. The emf induced in the secondary coil is 1.5 V. The mutual inductance between the coils is
A)
0.05 H
done
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B)
1.05 H
done
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C)
0.1 H
done
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D)
0.2 H
done
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question_answer 99) Radius of the curved road on national highway is R. Width of the road is b. The outer edge of the road is raised by h with respect to inner edge so that a car with velocity v can pass safe over it. The value of h is
A)
\[\frac{{{v}^{2}}b}{Rg}\]
done
clear
B)
\[\frac{v}{Rgb}\]
done
clear
C)
\[\frac{{{v}^{2}}R}{g}\]
done
clear
D)
\[\frac{{{v}^{2}}b}{R}\]
done
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question_answer 100) What is the (rms) value of an alternating current which when passed through a resistor produces heat which is thrice that of produced by a direct current of 2 A in the same resistor?
A)
6 A
done
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B)
2 A
done
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C)
3.46 A
done
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D)
0.66 A
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question_answer 101) The monomer units of starch are
A)
\[\alpha -\]glucose
done
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B)
\[\beta -\]glucose
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C)
pyranose
done
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D)
galactose
done
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question_answer 102) The only vitamin with metal atom in it, is
A)
vitamin\[-A\]
done
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B)
vitamin\[-K\]
done
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C)
vitamin\[-{{B}_{12}}\]
done
clear
D)
vitamin\[-E\]
done
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question_answer 103) Which of the following is used to make non-stick cookware?
A)
PVC
done
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B)
Polystyrene
done
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C)
Polyethylene terephthalate
done
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D)
Polytetrafluoro ethylene
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question_answer 104) Nylon-6 is made from
A)
1, 3-butadiene
done
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B)
chloroprene
done
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C)
adipic acid
done
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D)
carpolactum
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question_answer 105) The functional group which is found in amino acid is
A)
\[-COOH\]
done
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B)
\[-N{{H}_{2}}\]
done
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C)
\[-C{{H}_{3}}\]
done
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D)
Both (a) and (b)
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question_answer 106) The units of conductivity are
A)
\[oh{{m}^{-1}}\]
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B)
\[oh{{m}^{-1}}c{{m}^{-1}}\]
done
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C)
\[oh{{m}^{-2}}c{{m}^{2}}equi{{v}^{-1}}\]
done
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D)
\[oh{{m}^{-1}}c{{m}^{2}}\]
done
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question_answer 107) The colloidal system in which the disperse phase and dispersion medium are both liquids is known as
A)
a gel
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B)
an aerosol
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C)
an emulsion
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D)
a foam
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question_answer 108) Which of the following is not an ore of magnesium?
A)
Gypsum
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B)
Dolomite
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C)
Magnesite
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D)
Carnallite
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question_answer 109) An example of water soluble vitamin is
A)
vitamin-D
done
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B)
vitamin-E
done
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C)
vitamin-A
done
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D)
vitamin-C
done
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question_answer 110) During smelting an additional substance is added which combines with impurities to form a fusible product which is known as
A)
mud
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B)
slag
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C)
flux
done
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D)
gangue
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question_answer 111) Isotonic solutions are the solutions having the same
A)
surface tension
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B)
vapour pressure
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C)
osmotic pressure
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D)
viscosity
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question_answer 112) Hydrogen bond is strongest in
A)
\[S-H\cdot \cdot \cdot \cdot \cdot O\]
done
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B)
\[O-H\cdot \cdot \cdot \cdot \cdot S\]
done
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C)
\[F-H\cdot \cdot \cdot \cdot \cdot F\]
done
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D)
\[O-H\cdot \cdot \cdot \cdot \cdot N\]
done
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question_answer 113)
Match List I and List II and pick out correct matching codes from the given choices. List I (Compound) List II (Structure) A \[Cl{{F}_{3}}\] 1. Square planar B \[PC{{l}_{5}}\] 2. Tetrahedral C \[I{{F}_{5}}\] 3. Trigonal by pramidal D \[CC{{l}_{4}}\] 4. Square pyradimal E \[Xe{{F}_{4}}\] 5. T-Shaped
A)
\[A-5,\,\,B-4,\,\,C-3,\,\,D-2,\,\,E-1\]
done
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B)
\[A-5,\,\,B-3,\,\,C-4,\,\,D-2,\,\,E-1\]
done
clear
C)
\[A-5,\,\,B-3,\,\,C-4,\,\,D-1,\,\,E-2\]
done
clear
D)
\[A-4,\,\,B-3,\,\,C-5,\,\,D-2,\,\,E-1\]
done
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question_answer 114) In which of the following pairs, the two species have identical bond order?
A)
\[N_{2}^{-},\,\,O_{2}^{2-}\]
done
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B)
\[N_{2}^{+},\,\,O_{2}^{-}\]
done
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C)
\[N_{2}^{-},\,\,O_{2}^{+}\]
done
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D)
\[O_{2}^{+},\,\,N_{2}^{2-}\]
done
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question_answer 115) The mass of a photon with wavelength \[3.6\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\] is
A)
\[6.135\times {{10}^{-19}}\]
done
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B)
\[5.6135\times {{10}^{-29}}\]
done
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C)
\[6.100\times {{10}^{-19}}\]
done
clear
D)
\[6.135\times {{10}^{-29}}\]
done
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question_answer 116)
The following compound is used as
A)
an anti-inflammatory compound
done
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B)
analgesic
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C)
hypnotic
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D)
antiseptic
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question_answer 117) Presence of a nitro group in a benzene ring
A)
renders the ring basic
done
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B)
deactivates the ring towards nucleophilic substitution
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C)
deactivates the ring towards electrophilic substitution
done
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D)
activates the ring towards electrophilic substitution
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question_answer 118) Polymer used in bullet proof glass is
A)
PMMA
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B)
lexan
done
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C)
nomex
done
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D)
Kevlar
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question_answer 119) Which of the following is a pair of isobar?
A)
\[_{6}{{C}^{13}},\,{{\,}_{7}}{{N}^{13}}\]
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B)
\[_{6}{{C}^{13}},\,{{\,}_{7}}{{N}^{14}}\]
done
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C)
\[_{7}{{N}^{14}},\,{{\,}_{8}}{{O}^{16}}\]
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D)
\[_{7}{{N}^{13}},\,{{\,}_{8}}{{O}^{18}}\]
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question_answer 120) The nitrogen atom has 7 protons and 7 electrons. The nitride ion will have
A)
7 protons and 10 electrons
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B)
4 protons and 7 electrons
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C)
4 protons and 10 electrons
done
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D)
10 protons and 7 electrons
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question_answer 121) In which of the following the magnetic character is not correct?
A)
\[CuCl_{4}^{2}-1\]unpaired electron
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B)
\[[Fe{{({{H}_{2}}{{O}_{6}}]}^{2+}}-5\]unpaired electrons
done
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C)
\[{{[Zn{{(N{{H}_{3}})}_{2}}]}^{2+}}\]Diamagnetic
done
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D)
\[{{[Co{{F}_{6}}]}^{3-}}-4\]unpaired electrons
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question_answer 122) The complex used as an anticancer agent is
A)
\[mer-[CoC{{l}_{3}}{{(N{{H}_{3}})}_{3}}]\]
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B)
\[cis-[PtC{{l}_{2}}{{(N{{H}_{3}})}_{2}}]\]
done
clear
C)
\[cis-{{K}_{2}}[PtB{{r}_{2}}C{{l}_{2}}]\]
done
clear
D)
\[N{{a}_{2}}[Co{{(Cl)}_{4}}]\]
done
clear
View Answer play_arrow
question_answer 123) EDTA has coordination number
A)
3
done
clear
B)
4
done
clear
C)
5
done
clear
D)
6
done
clear
View Answer play_arrow
question_answer 124) 3-pentanol is an example of
A)
primary alcohol
done
clear
B)
secondary alcohol
done
clear
C)
tertiary alcohol
done
clear
D)
aromatic alcohol
done
clear
View Answer play_arrow
question_answer 125) The incorrect IUPAC name is
A)
\[\underset{\text{2-methyl-3-butanone}}{\mathop{C{{H}_{3}}\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{3}}}}\,\]
done
clear
B)
\[\underset{2,\,\,3-\text{dimethylpentane}}{\mathop{C{{H}_{3}}\underset{\begin{smallmatrix} || \\ C{{H}_{2}} \end{smallmatrix}}{\mathop{C}}\,H-\underset{\begin{smallmatrix} | \\ C{{H}_{2}}C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{3}}}}\,\]
done
clear
C)
\[\underset{\text{2-pentyne}}{\mathop{C{{H}_{3}}-C\equiv C-C{{H}_{2}}-C{{H}_{3}}}}\,\]
done
clear
D)
\[\underset{\text{2-bromo-3-chloro-butane}}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ Cl \end{smallmatrix}}{\mathop{C}}\,H-\underset{\begin{smallmatrix} | \\ Br \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{3}}}}\,\]
done
clear
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question_answer 126) Which alkene on ozonolysis gives\[C{{H}_{3}}C{{H}_{2}}CHO\] and\[C{{H}_{3}}COC{{H}_{3}}\]?
A)
\[C{{H}_{3}}C{{H}_{2}}CH=C{{(C{{H}_{3}})}_{2}}\]
done
clear
B)
\[C{{H}_{3}}C{{H}_{2}}CH=CHC{{H}_{2}}C{{H}_{3}}\]
done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}CH=CHC{{H}_{3}}\]
done
clear
D)
\[{{(C{{H}_{3}})}_{2}}CH=CHC{{H}_{3}}\]
done
clear
View Answer play_arrow
question_answer 127) Isopropyl bromide on Wurtz reaction gives
A)
hexane
done
clear
B)
propane
done
clear
C)
2, 3-dimethylbutane
done
clear
D)
neohexane
done
clear
View Answer play_arrow
question_answer 128) Which of the following represents the given mode of hybridization\[s{{p}^{2}}-s{{p}^{2}}-sp-sp\] from left to right?
A)
\[{{H}_{2}}C=CH-C\equiv N\]
done
clear
B)
\[HC\equiv C-C\equiv CH\]
done
clear
C)
\[{{H}_{2}}C=C=C{{H}_{2}}\]
done
clear
D)
done
clear
View Answer play_arrow
question_answer 129) \[B{{F}_{3}}\]is
A)
electron-deficient compound
done
clear
B)
Lewis base
done
clear
C)
used as rocket fuel
done
clear
D)
ionic compound
done
clear
View Answer play_arrow
question_answer 130) \[C{{H}_{2}}-\underset{\begin{smallmatrix} || \\ \underset{\centerdot \,\,\,\centerdot }{\mathop{O\,\,\mathbf{:}}}\, \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]and\[C{{H}_{2}}=\underset{\begin{smallmatrix} | \\ \underset{\centerdot \,\,\,\centerdot }{\mathop{\mathbf{:}O\mathbf{:}}}\, \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]are
A)
resonating structures
done
clear
B)
tautomers
done
clear
C)
geometrical isomers
done
clear
D)
optical isomers
done
clear
View Answer play_arrow
question_answer 131) Fluorobenzene can be synthesized in the laboratory
A)
from aniline by diazotization followed by heating the diazonium salt with\[HB{{F}_{4}}\]
done
clear
B)
by direct fluorination of benzene with \[{{F}_{2}}\] gas
done
clear
C)
by reacting bromobenzene with \[NaF\] solution
done
clear
D)
by heating phenol with \[HF\] and \[KF\]
done
clear
View Answer play_arrow
question_answer 132) Glucose reacts with X number of molecules of phenyl hydrazine to yield osazone. The value of\[X\]is
A)
three
done
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B)
two
done
clear
C)
one
done
clear
D)
four
done
clear
View Answer play_arrow
question_answer 133) The wavelength of which series lie towards the ultraviolet
A)
Lymann
done
clear
B)
Balmer
done
clear
C)
Paschen
done
clear
D)
None of these
done
clear
View Answer play_arrow
question_answer 134) A \[p-\]orbital accommodate maximum
A)
4 electrons
done
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B)
6 electrons
done
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C)
2 electrons with parallel spins
done
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D)
2 electrons with opposite spins
done
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View Answer play_arrow
question_answer 135) Ease of formation of the cation is favoured by
A)
lower value of ionization potential
done
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B)
lower value of electron affinity
done
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C)
higher value of electron affinity
done
clear
D)
lower value of electronegativity
done
clear
View Answer play_arrow
question_answer 136) What is the mole fraction of solute in \[2.5\,\,m\]aqueous solution?
A)
\[0.430\]
done
clear
B)
\[4.30\]
done
clear
C)
\[3.40\]
done
clear
D)
\[0.043\]
done
clear
View Answer play_arrow
question_answer 137) Which of the following carbon atoms is likely to possess tetrahedral geometry? \[{{H}_{2}}\overset{4}{\mathop{C}}\,=\overset{3}{\mathop{C}}\,H-\overset{2}{\mathop{C}}\,{{H}_{2}}-\overset{1}{\mathop{C}}\,OOH\]
A)
1
done
clear
B)
2
done
clear
C)
3
done
clear
D)
4
done
clear
View Answer play_arrow
question_answer 138) The compound with an isopropyl group is
A)
2, 2, 3, 3-tetramethylpentane
done
clear
B)
2, 2-dimethylpentane
done
clear
C)
2, 2, 3, trimethylpentane
done
clear
D)
2-methylpentane
done
clear
View Answer play_arrow
question_answer 139) Borax is used as a cleansing agent because on dissolving in water, it gives
A)
alkaline solution
done
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B)
acidic solution
done
clear
C)
bleaching solution
done
clear
D)
amphoteric solution
done
clear
View Answer play_arrow
question_answer 140) Which is strongest Lewis acid?
A)
\[B{{F}_{3}}\]
done
clear
B)
\[BC{{l}_{3}}\]
done
clear
C)
\[BB{{r}_{3}}\]
done
clear
D)
\[B{{I}_{3}}\]
done
clear
View Answer play_arrow
question_answer 141) Which of the following has maximum unpaired \[d-\]electrons?
A)
\[Z{{n}^{2+}}\]
done
clear
B)
\[F{{e}^{2+}}\]
done
clear
C)
\[N{{i}^{2+}}\]
done
clear
D)
\[C{{u}^{+}}\]
done
clear
View Answer play_arrow
question_answer 142) In the reaction \[C{{H}_{3}}C{{H}_{2}}COOH\xrightarrow{C{{l}_{2}},\,\,P}X\xrightarrow{alc.\,\,KOH}Y,\,\,Y\]is
A)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\]
done
clear
B)
\[C{{H}_{2}}=CHCOOH\]
done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}CN\]
done
clear
D)
\[\underset{\begin{smallmatrix} | \\ Cl \end{smallmatrix}}{\mathop{C}}\,{{H}_{2}}C=COOH\]
done
clear
View Answer play_arrow
question_answer 143) Select the \[_{p}{{K}_{a}}\] value of the strongest acid.
A)
\[1.0\]
done
clear
B)
\[3.0\]
done
clear
C)
\[2.0\]
done
clear
D)
\[4.5\]
done
clear
View Answer play_arrow
question_answer 144) Hinsbergs reagent is
A)
benzene sulphonyl chloride
done
clear
B)
benzene sulphonic acid
done
clear
C)
phenyl isocyanide
done
clear
D)
benzene sulphonamide
done
clear
View Answer play_arrow
question_answer 145) Which of the following will not give a primary amine?
A)
\[C{{H}_{3}}CO{{H}_{2}}\xrightarrow{B{{r}_{2}},\,\,KOH}\]
done
clear
B)
\[C{{H}_{3}}CN\xrightarrow{LiAl{{H}_{4}}}\]
done
clear
C)
\[C{{H}_{3}}NHC\xrightarrow{LiAl{{H}_{4}}}\]
done
clear
D)
\[C{{H}_{3}}CON{{H}_{2}}\xrightarrow{LiAl{{H}_{4}}}\]
done
clear
View Answer play_arrow
question_answer 146) The product formed as a result of reaction of \[C{{H}_{3}}MgBr\] and\[C{{O}_{2}}\], on further hydrolysis gives
A)
\[C{{H}_{3}}COOH\]
done
clear
B)
\[HCOOH\]
done
clear
C)
oxalic acid
done
clear
D)
acetic acid
done
clear
View Answer play_arrow
question_answer 147) The reaction \[RC{{H}_{2}}C{{H}_{2}}COOH\xrightarrow[B{{r}_{2}}]{\text{Red}\,\,P}RC{{H}_{2}}\underset{\begin{smallmatrix} | \\ Br \end{smallmatrix}}{\mathop{C}}\,HCOOH\]
A)
Reimer-Tiemann reaction
done
clear
B)
Hell Volhard Zelinsky reaction
done
clear
C)
Cannizaros reaction
done
clear
D)
Sandmeyers reaction
done
clear
View Answer play_arrow
question_answer 148) Which of the following compound is most reactive towards nucleophilic addition reaction?
A)
Ethanal
done
clear
B)
Propanal
done
clear
C)
Butanone
done
clear
D)
Propanone
done
clear
View Answer play_arrow
question_answer 149) For an equilibrium reaction, the rate constants for the forward and the backward reaction are \[2.38\times {{10}^{-4}}\] and \[8.15\times {{10}^{-5}}\] respectively. What will be the equilibrium constant for the reaction?
A)
\[92.2\]
done
clear
B)
\[29.2\]
done
clear
C)
\[20.2\]
done
clear
D)
\[2.92\]
done
clear
View Answer play_arrow
question_answer 150) Which acid is present in vinegar?
A)
Hydrochloric acid
done
clear
B)
Acetic acid
done
clear
C)
Citric acid
done
clear
D)
Tartaric acid
done
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View Answer play_arrow
question_answer 151) Which one of the following types of drugs reduces fever?
A)
Analgesics
done
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B)
Antipyretics
done
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C)
Aspirin
done
clear
D)
Tranquillizers
done
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View Answer play_arrow
question_answer 152) In\[HCO{{O}^{-}}\], the two carbon-oxygen bonds are found to be of equal length. What is the reason for this?
A)
The anion is obtained by the removal of a proton from the acid molecule
done
clear
B)
Electronic orbitals of carbon atoms are hybridized
done
clear
C)
The \[C=O\] bond is weaker than \[C-O\] bond
done
clear
D)
The anion \[HCO{{O}^{-}}\] has two resonating Structures
done
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View Answer play_arrow
question_answer 153) In a set of reactions, acetic acid yielded product \[D.C{{H}_{3}}COOH\xrightarrow{SOC{{l}_{2}}}A\xrightarrow[Anhy.\,\,AlC{{l}_{3}}]{Benzene}\]\[B\xrightarrow{HCN}C\xrightarrow{HOH}D\]. The structure of\[D\]would be
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
question_answer 154)
How many bonds are there in
A)
\[14\sigma ,\,\,8\pi \]
done
clear
B)
\[18\sigma ,\,\,8\pi \]
done
clear
C)
\[19\sigma ,\,\,4\pi \]
done
clear
D)
\[14\sigma ,\,\,2\pi \]
done
clear
View Answer play_arrow
question_answer 155) Principal, azimuthal and magnetic quantum numbers are respectively related to
A)
size, orientation and shape
done
clear
B)
size, shape and orientation
done
clear
C)
shape, size and orientation
done
clear
D)
None of the above
done
clear
View Answer play_arrow
question_answer 156) Paulis exclusion principle states that
A)
the nucleus of an atom is negatively charged
done
clear
B)
electrons revolve around the nucleus in circular orbits
done
clear
C)
electrons enter into lowest energy orbitals
done
clear
D)
no two electrons in an atom can have all the four quantum numbers identical
done
clear
View Answer play_arrow
question_answer 157) The geometry of \[XeO{{F}_{2}}\] is
A)
pyramidal
done
clear
B)
T-shaped
done
clear
C)
octahedral
done
clear
D)
tetrahedral
done
clear
View Answer play_arrow
question_answer 158) The noble gas compound prepared by Harriett was
A)
\[Xe{{O}_{3}}\]
done
clear
B)
\[XePt{{F}_{6}}\]
done
clear
C)
\[Kr{{F}_{2}}\]
done
clear
D)
\[Xe{{F}_{2}}\]
done
clear
View Answer play_arrow
question_answer 159) Which of the following has highest ionization enthalpy?
A)
\[P\]
done
clear
B)
\[N\]
done
clear
C)
\[As\]
done
clear
D)
\[Sb\]
done
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View Answer play_arrow
question_answer 160) \[X\] is heated with soda lime and gives ethane. \[X\] is
A)
ethanoic acid
done
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B)
methanoic acid
done
clear
C)
propanoic acid
done
clear
D)
Either (a) or (c)
done
clear
View Answer play_arrow
question_answer 161) The correct order regarding the electronegativity of hybrid orbitals of carbon is
A)
\[sp<s{{p}^{2}}>s{{p}^{3}}\]
done
clear
B)
\[sp<s{{p}^{2}}<s{{p}^{3}}\]
done
clear
C)
\[sp>s{{p}^{2}}<s{{p}^{3}}\]
done
clear
D)
\[sp>s{{p}^{2}}>s{{p}^{3}}\]
done
clear
View Answer play_arrow
question_answer 162) Which of the following gas mixture is used by the divers inside the sea?
A)
\[{{O}_{2}}+He\]
done
clear
B)
\[{{O}_{2}}+Xe\]
done
clear
C)
\[{{O}_{2}}+Ar\]
done
clear
D)
\[{{O}_{2}}+{{N}_{2}}\]
done
clear
View Answer play_arrow
question_answer 163) The laughing gas is
A)
nitrogen oxide
done
clear
B)
nitric oxide
done
clear
C)
nitrogen trioxide
done
clear
D)
nitrogen pentoxide
done
clear
View Answer play_arrow
question_answer 164) The number of nodal plane \[5\,\,d\] orbital has is
A)
zero
done
clear
B)
one
done
clear
C)
two
done
clear
D)
three
done
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View Answer play_arrow
question_answer 165) The atomic number of \[Ni\] and \[Cu\] are \[28\] and \[29\] respectively. The electronic configuration\[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{10}}\] represents
A)
\[Ni\]
done
clear
B)
\[N{{i}^{2+}}\]
done
clear
C)
\[C{{u}^{2+}}\]
done
clear
D)
\[C{{u}^{+}}\]
done
clear
View Answer play_arrow
question_answer 166) How many ions are produced from\[[Co{{(N{{H}_{3}})}_{6}}]C{{l}_{3}}\]in solution?
A)
\[6\]
done
clear
B)
\[4\]
done
clear
C)
\[3\]
done
clear
D)
\[2\]
done
clear
View Answer play_arrow
question_answer 167) Among the alkali metals, cesium is the most reactive because
A)
its incomplete shell is nearest to the nucleus
done
clear
B)
its has a single electron in the valence shell
done
clear
C)
it is the heaviest alkali metal
done
clear
D)
the outermost electron is more loosely bound than the outermost electron of the other alkali metals
done
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View Answer play_arrow
question_answer 168) The ionic mobility of alkali metal ions in aqueous solution is maximum for
A)
\[{{K}^{+}}\]
done
clear
B)
\[R{{b}^{+}}\]
done
clear
C)
\[L{{i}^{+}}\]
done
clear
D)
\[N{{a}^{+}}\]
done
clear
View Answer play_arrow
question_answer 169) Gypsum on heating to \[390\,\,K\] gives
A)
\[CaS{{O}_{4}}\cdot 2{{H}_{2}}O\]
done
clear
B)
\[CaS{{O}_{4}}\]
done
clear
C)
\[CaS{{O}_{4}}\cdot \frac{1}{2}{{H}_{2}}O\]
done
clear
D)
\[S{{O}_{3}}\]and\[CaO\]
done
clear
View Answer play_arrow
question_answer 170) Epsom salt is
A)
\[MgS{{O}_{4}}\cdot 7{{H}_{2}}O\]
done
clear
B)
\[CaS{{O}_{4}}\cdot {{H}_{2}}O\]
done
clear
C)
\[MgS{{O}_{4}}\cdot 2{{H}_{2}}O\]
done
clear
D)
\[BaS{{O}_{4}}\cdot 2{{H}_{2}}O\]
done
clear
View Answer play_arrow
question_answer 171) The temperature at which \[28\,\,g\] of \[{{N}_{2}}\] will occupy a volume of \[10.0\,\,L\] at\[2.46\,\,atm\]
A)
\[299.6\,\,K\]
done
clear
B)
\[{{0}^{o}}C\]
done
clear
C)
\[273\,\,K\]
done
clear
D)
\[{{10}^{o}}C\]
done
clear
View Answer play_arrow
question_answer 172) Para and ortho hydrogen differ in
A)
atomic number
done
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B)
atomic mass
done
clear
C)
spins of protons
done
clear
D)
number of neutrons
done
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View Answer play_arrow
question_answer 173) Atomic orbitals of carbon in carbon dioxide are
A)
\[sp-\]hybridized
done
clear
B)
\[s{{p}^{3}}d-\]hybridized
done
clear
C)
\[s{{p}^{2}}-\]hybridized
done
clear
D)
\[s{{p}^{3}}-\]hybridized
done
clear
View Answer play_arrow
question_answer 174) The appearance of colour in solid alkali metal halides is generally due to
A)
Schottky defect
done
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B)
Frenkel defect
done
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C)
Interstitial position
done
clear
D)
\[F-\]centres
done
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View Answer play_arrow
question_answer 175) Which among the following factors is most important in making fluorine the strongest oxidizing agent?
A)
Electron gain enthalpy
done
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B)
Ionization enthalpy
done
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C)
Hydration enthalpy
done
clear
D)
Bond dissociation enthalpy
done
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View Answer play_arrow
question_answer 176) How many coulombs are required to deposit \[50\,\,g\] of aluminium when the electrode reaction is \[A{{l}^{3+}}+3{{e}^{-}}\xrightarrow{{}}Al\]
A)
\[536111\,\,C\]
done
clear
B)
\[536.111\,\,C\]
done
clear
C)
\[96500\,\,C\]
done
clear
D)
\[38600\,\,C\]
done
clear
View Answer play_arrow
question_answer 177) In\[Cu\,\,(At.\,\,No.29)\]
A)
13 electrons have spin in one direction and 16 electrons in other direction
done
clear
B)
14 electrons have spin one direction and 15 electrons in other direction
done
clear
C)
one electron can have spin only in the clockwise direction
done
clear
D)
None of the above is correct
done
clear
View Answer play_arrow
question_answer 178) The boiling point of water is\[{{100}^{o}}C\]. What will be the boiling point of an aqueous solution containing \[0.6\,\,g\] of urea (molar mass\[=60\]) in \[100\,\,g\] of water?(\[{{K}_{b}}\]for water\[=0.52\,\,K/m\])
A)
\[{{100.052}^{o}}C\]
done
clear
B)
\[{{101.052}^{o}}C\]
done
clear
C)
\[{{120.52}^{o}}C\]
done
clear
D)
None of these
done
clear
View Answer play_arrow
question_answer 179) Sodium metal crystallizes in body centred cubic lattice with cell edge\[4.29\overset{\text{o}}{\mathop{\text{A}}}\,\] . What is the radius of sodium atom?
A)
\[2.86\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
clear
B)
\[6.81\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
clear
C)
\[1.68\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
clear
D)
\[1.86\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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View Answer play_arrow
question_answer 180) Hydrogen sulphide is acidic while water is neutral. The reason is
A)
molecular weight of \[{{H}_{2}}S\] is more than \[{{H}_{2}}O\]
done
clear
B)
water molecules associate, while \[{{H}_{2}}S\] molecules do not
done
clear
C)
\[H-S\]bond is weaker than \[H-O\] bond due to the bigger size of \[S-\]atom
done
clear
D)
S-atoms has less affinity for hydrogen atom than \[O\] atom has for it
done
clear
View Answer play_arrow
question_answer 181) Percentage of cation in ammonium dichromate \[{{(N{{H}_{4}})}_{2}}C{{r}_{2}}{{O}_{7}}\] is
A)
\[41.29%\]
done
clear
B)
\[14.29%\]
done
clear
C)
\[20.29%\]
done
clear
D)
None of these
done
clear
View Answer play_arrow
question_answer 182) Identify the compounds \[A\] and \[B\] in the following reaction sequence. \[Ca{{C}_{2}}(s)+{{H}_{2}}O(l)\xrightarrow{{}}A(g)\xrightarrow[HgS{{O}_{4}}]{{{H}_{2}}S{{O}_{4}}}B(l)\]
A)
\[A\]is ethylene, \[B\] is acetaldehyde
done
clear
B)
\[A\]is acetylene, \[B\] is propionaldehyde
done
clear
C)
\[A\]is ethane, \[B\] is ethanol
done
clear
D)
\[A\]is acetylene, \[B\] is acetaldehyde
done
clear
View Answer play_arrow
question_answer 183) The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is
A)
\[F{{e}_{4}}{{[Fe(C{{N}_{6}})]}_{3}}\]
done
clear
B)
\[N{{a}_{3}}[Fe{{(CN)}_{6}}]\]
done
clear
C)
\[Fe{{(CN)}_{3}}\]
done
clear
D)
\[N{{a}_{4}}[Fe{{(CN)}_{5}}COS]\]
done
clear
View Answer play_arrow
question_answer 184) The arrangement of\[{{(C{{H}_{3}})}_{3}}C-,\,\,{{(C{{H}_{3}})}_{2}}CH-,\]\[C{{H}_{3}}C{{H}_{2}}-\]when attached to benzene or unsaturated group in increasing order of inductive effect is
A)
\[{{(C{{H}_{3}})}_{3}}C-<{{(C{{H}_{3}})}_{3}}CH-<C{{H}_{3}}C{{H}_{2}}-\]
done
clear
B)
\[C{{H}_{3}}C{{H}_{2}}-<{{(C{{H}_{3}})}_{2}}CH-<{{(C{{H}_{3}})}_{3}}C-\]
done
clear
C)
\[{{(C{{H}_{3}})}_{2}}CH-<{{(C{{H}_{3}})}_{3}}C-<C{{H}_{3}}C{{H}_{2}}-\]
done
clear
D)
\[{{(C{{H}_{3}})}_{3}}C-<C{{H}_{3}}C{{H}_{2}}-<{{(C{{H}_{3}})}_{2}}CH-\]
done
clear
View Answer play_arrow
question_answer 185) Pieces of wood burn faster than a log of wood of the same mass because
A)
surface area of log of wood is larger and needs more time to burn
done
clear
B)
pieces of wood have large surface area
done
clear
C)
all pieces of wood catch fire at the same time
done
clear
D)
block of wood has higher density than pieces of the same wood
done
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View Answer play_arrow
question_answer 186) Bravais lattices are of
A)
8 types
done
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B)
9 types
done
clear
C)
12 types
done
clear
D)
14 types
done
clear
View Answer play_arrow
question_answer 187) In the following nuclear reaction, the other product is \[_{52}T{{e}^{130}}{{+}_{1}}{{H}^{2}}{{\xrightarrow{{}}}_{53}}{{I}^{131}}+?\]
A)
positron
done
clear
B)
one neutron
done
clear
C)
proton
done
clear
D)
alpha particle
done
clear
View Answer play_arrow
question_answer 188) The number of a and p-particles emitted in the nuclear reaction \[_{90}T{{h}^{228}}{{\xrightarrow{{}}}_{83}}B{{i}^{212}}\]are
A)
\[4\alpha \]and\[1\beta \]
done
clear
B)
\[3\alpha \]and\[7\beta \]
done
clear
C)
\[8\alpha \]and\[1\beta \]
done
clear
D)
\[4\alpha \]and\[7\beta \]
done
clear
View Answer play_arrow
question_answer 189) Schottky defect in crystals is observed when
A)
density of crystal is increased
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B)
an ion leaves its normal site and occupies an interstitial site
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C)
equal number of cations and anions are missing from the lattice
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D)
unequal number of cations and anions are missing from the lattice
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question_answer 190) What happens when an egg is kept in saturated solution of \[NaCl\] after removing its hard shell in\[dil\,\,HCl\]?
A)
Egg will swell
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B)
Egg will shrink
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C)
Egg will remain same
done
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D)
Egg will first shrink and then swell
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question_answer 191) Which of the following is the expression of Raoults law? (\[p=\]vapour pressure of pure solvent, \[{{p}_{s}}=\]vapour pressure of the solution)
A)
\[\frac{p-{{p}_{s}}}{p}=\frac{n}{n+N}\]
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B)
\[\frac{{{p}_{s}}-p}{p}=\frac{N}{N+n}\]
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C)
\[\frac{p-{{p}_{s}}}{{{p}_{s}}}=\frac{N}{N-n}\]
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D)
\[\frac{{{p}_{s}}-p}{{{p}_{s}}}=\frac{N-n}{N}\]
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question_answer 192) A catalyst alter the rate of reaction by
A)
altering enthalpy
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B)
altering internal energy
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C)
altering energy of activation
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D)
All of the above
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question_answer 193) The noble gas which can diffuse through rubber and glass easily is
A)
\[Xe\]
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B)
\[Ne\]
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C)
\[Ar\]
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D)
\[He\]
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question_answer 194)
Among the following molecule (i) \[Xe{{O}_{3}}\] (ii)\[Xe{{O}_{4}}\] (iii)\[Xe{{F}_{6}}\]
those having same number of lone pairs on\[Xe\] are
A)
(i) and (iii) only
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B)
(i) and (ii) only
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C)
(ii) and (iii) only
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D)
(i), (ii) and (iii)
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question_answer 195)
In the following halogen compounds, which compound undergoes fastest \[{{S}_{N}}1\] reaction?
A)
(i)
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B)
(ii)
done
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C)
(iii)
done
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D)
None of these
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question_answer 196) \[UV\]radiations brings about
A)
skin cancer
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B)
mouth cancer
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C)
lung cancer
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D)
liver cancer
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question_answer 197) Sublimation is a process in which a solid
A)
changes into vapour form
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B)
changes into another allotropic form
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C)
changes into liquid form
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D)
None of the above
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question_answer 198) Pollution is
A)
removal of top soil
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B)
release of toxic/undesirable materials in environment
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C)
conservation of energy
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D)
All of the above
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question_answer 199) Gas released during Bhopal tragedy was
A)
methyl isocyanate
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B)
potassium isothiocyanate
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C)
sodium isothiocyanate
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D)
ethyl isothiocyanate
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question_answer 200) In\[AgBr\], these can occur
A)
Only Schottky defect
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B)
Only Frenkel defect
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C)
Both (a) and (b)
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D)
None of the above
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question_answer 201) Plasmodesmata connections help in
A)
cytoplasmic streaming
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B)
synchronous mitotic divisions
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C)
locomotion of unicellular organisms
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D)
movement of substances between cells
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question_answer 202) The quiescent centre in root meristem serves as
A)
site for storage of food, which is utilized during maturation
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B)
reservoir of growth hormones
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C)
reserve for replenishment of damaged cells of the meristem
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D)
region for absorption of water
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question_answer 203) Azolla is used as a biofertilizer because it
A)
multiplies very fast to produce massive biomass
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B)
has association of nitrogen-fixing Rhizobium
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C)
has association of nitrogen-fixing cyanobacteria
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D)
has association of mycorrhiza
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question_answer 204) A person is wearing spectacles with concave lenses for correcting vision. While not using the glasses, the image of a distant object in his case will be formed
A)
on the blind spot
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B)
behind the retina
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C)
in front of the retina
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D)
on the yellow spot
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question_answer 205) Which one of the following codon codes for the same information as UGC?
A)
UGU
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B)
UGA
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C)
UAG
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D)
UGG
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question_answer 206) People recovering from long illness are often advised to include the alga Spirulina in their diet because it
A)
makes the food easy to digest
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B)
is rich in proteins
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C)
has antibiotic properties
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D)
restores the intestinal microflora
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question_answer 207) The phase of menstrual cycle in humans that lasts for 7-8 days is
A)
follicular phase
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B)
ovulatory phase
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C)
luteal phase
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D)
menstruation
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question_answer 208) Restriction enzymes
A)
are endonucleases, which cleave DNA at specific sites
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B)
make DNA complementary to an existing DNA or RNA
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C)
cut or join DNA fragments
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D)
are required in vector less direct gene transfer
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question_answer 209) Excessive stimulation of vagus nerve in humans may lead to
A)
hoarse voice
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B)
peptic ulcers
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C)
efficient digestion of proteins
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D)
irregular contraction of diaphragm
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question_answer 210) An example of competitive inhibition of an enzyme is the inhibition of
A)
succinic dehydrogenase by malonic acid
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B)
cytochrome oxidase by cyanide
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C)
hexokinase by glucose-6-phosphate
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D)
carbonic anhydrase by carbon dioxide
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question_answer 211) A person passes much urine and drinks much water but his blood glucose level is normal. This conditions may be the result of
A)
a reduction in insulin secretion from pancreas
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B)
a reduction in vasopressin secretion from posterior pituitary
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C)
a fall in the glucose concentration in urine
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D)
an increase in secretion of glucagon
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question_answer 212) Biological Oxygen Demand (BOD) is a measure of
A)
industrial wastes poured into water bodies
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B)
extent to which water is polluted with organic compound
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C)
amount of carbon monoxide inseparably combined with haemoglobin
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D)
amount of oxygen needed by green plants during night
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question_answer 213) Somaclonal variation is seen in
A)
tissue culture grown plants
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B)
apomicts
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C)
polyploids
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D)
vegetatiely propagated plants
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question_answer 214) Among rust, smut and mushroom, all the three
A)
are pathogens
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B)
are saprobes
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C)
bear ascocarps
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D)
bear basidiocarps
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question_answer 215) In prokaryotes, chromatophores are
A)
specialized granules responsible for coloration of cells
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B)
structures responsible for organizing the shape of the organism
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C)
incusion bodies lying free inside the cells for carrying out various metabolic activities
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D)
internal membrane systems that may become extensive and complex in photosynthetic bacteria
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question_answer 216) A scion is grafted to a stock. The quality of fruits produced will be determined by the genotype of
A)
stock
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B)
scion
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C)
Both (a) and (b)
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D)
Neither (a) nor (b)
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question_answer 217) The Montreal Protocol refers to
A)
persistent organic pollutants
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B)
global warming and climate change
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C)
substances that deplete the ozone layer
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D)
biosafety of genetically modified organisms
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question_answer 218) Keystone species deserve protection because these
A)
are capable of surviving in harsh environmental conditions
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B)
Indicate presence of certain minerals in the soil
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C)
have become rare due to over exploitation
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D)
play an important role in supporting other species
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question_answer 219) Grafting is successful in dicots but not in monocots because the dicots have
A)
vascular bundles arranged in a ring
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B)
cambium for secondary growth
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C)
vessels with elements arranged end to end
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D)
cork cambium
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question_answer 220) In the sieve elements, which one of the following is the most likely function of P-proteins?
A)
Deposition of callose on sieve plates
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B)
Providing energy for active translocation
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C)
Autolyric enzymes
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D)
Sealing off mechanism on wounding
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question_answer 221) A normal woman whose father was colurblind, is married to a normal man. The sons would be
A)
75% colourblind
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B)
50% colourblind
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C)
all normal
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D)
all colourblind
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question_answer 222) Which one of the following precedes re-formation of the nuclear envelope during M phase of the cell cycle?
A)
Decondensation from chromosomes and reassembly of the nuclear lamina
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B)
Transcription from chromosome and reassembly of the nuclear lamina
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C)
Formation of the contractile ring and formation of the phragmoplast
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D)
Formation of the contractile ring and transcription from chromosomes
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question_answer 223) The type of epithelial cells, which line the inner surface of Fallopian tubes, bronchioles and small bronchi, are known as
A)
squamous epithelium
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B)
columnar epithelium
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C)
ciliated epithelium
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D)
cubical epithelium
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question_answer 224) Which one of the following pairs is correctly matched?
A)
Rhizobium -Parasite in the roots of leguminous plants
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B)
Mycorrhizae - Mineral uptake from soil
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C)
Yeast - Production of biogas
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D)
Myxomycetes - The disease ringworm
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question_answer 225) A cricket player is fast chasing a ball in the field. Which one of the following groups of bones are directly contributing in this movement?
A)
Femur, malleus, tibia, metatarsals
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B)
Pelvis, ulna, patella, tarsals
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C)
Sternum, femur, tibia, fibula
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D)
Tarsals, femur, metatarsals, tibia
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question_answer 226) Viruses that infect bacteria multiply and cause their lysis, are called
A)
lysozymes
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B)
lipolytic
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C)
lyric
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D)
lysogenic
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question_answer 227) Pollution from animal excreta and organic waste from kitchen can be most profitably minimized by
A)
storing them in underground storage tanks
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B)
using them for producing biogas
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C)
vermiculture
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D)
using them directly as bio-fertilizers
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question_answer 228) Mating of an organism to a double recessive in order to determine whether it is homozygous or heterozygous for a character under consideration is called
A)
reciprocal cross
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B)
test cross
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C)
dihybrid cross
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D)
back cross
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question_answer 229) Which one of the following pairs of features is a good example of polygenic inheritance?
A)
Human height and skin colour
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B)
ABO blood group in humans and flower colour of Mirabilis jalapa
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C)
Hair pigment of mouse and tongue rolling in humans
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D)
Human eye colour and sickle cell anaemia
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question_answer 230) A lizard-like member of Reptilia is string on a tree with its tail coiled around a twig. This animal could be
A)
Hemidactylus showing sexual dimorphism
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B)
Varanus showing mimicry
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C)
Calotes (garden lizard) showing camouflage
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D)
Chamaeleon showing protective colouration
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question_answer 231) All mammals without any exception are characterised by
A)
vivipariry and biconcave red blood cells extra
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B)
abdominal tests and a four-chambered heart
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C)
heterodont teeth and 12 pairs of cranial nerves
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D)
a muscular diaphragm and milk producing glands
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question_answer 232) During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge?
A)
First negative, then positive and again back to negative
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B)
First positive, then negative and continue to be negative
done
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C)
First negative, then positive and continue to be positive
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D)
First positive, then negative and again back to positive
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question_answer 233) If you are asked to classify the various algae into distinct groups, which of the following characters you should choose?
A)
Types of pigments present in the cell
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B)
Nature of stored food materials in the cell
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C)
Structure organization of thallus
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D)
Chemical composition of the cell wall
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question_answer 234) A plant require magnesium (Mg) for
A)
holding cells together
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B)
protein synthesis
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C)
chlorophyll synthesis
done
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D)
cell wall development
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question_answer 235) Ultrasound of how much frequency is beamed into human body for sonography?
A)
30 to 45 MHz
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B)
15 to 30 MHz
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C)
1 to 5 MHz
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D)
45 to 70 MHz
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question_answer 236) Which one of the following pairs of structures distinguished a nerve cell from other types of cell?
A)
Perikaryon and dendrites
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B)
Vacuoles and fibres
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C)
Flagellum and medullary sheath
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D)
Nucleus and mitochondria
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question_answer 237) All enzymes of TCA cycle are located in the mitochondrial matrix except one, which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is
A)
lactate dehydrogenase
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B)
isocitrate dehydrogenase
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C)
malate dehydrogenase
done
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D)
succinate dehydrogenase
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question_answer 238) When two species of different genealogy come to resemble each other as a result of adaptation the phenomenon is termed as
A)
divergent evolution
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B)
microevolution
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C)
co-evolution
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D)
convergent evolution
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question_answer 239) Which one of the following is a matching pair of a body feature and the animal possessing it?
A)
Post-anal tail - Octopus
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B)
Ventral central nervous - Leech system
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C)
Pharyngeal gills slits absent - Chamaeleon m embryo
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D)
Ventral heart - Scorpion
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question_answer 240) Bowmans glands are located in the
A)
proximal end of uriniferous tubules
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B)
anterior pituitary
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C)
female reproductive system of cockroach
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D)
olfactory epithelium of our nose
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question_answer 241) Which one of the following pairs, is not correctly matched?
A)
Abscisic acid - Stomatal closure
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B)
Gibberellic acid - Leaf fall
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C)
Cytokinin - Cell division
done
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D)
IAA - Cell wall elongation
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question_answer 242) Which one of the following element is not an essential micronutrient for plant growth?
A)
Manganese
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B)
Zinc
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C)
Copper
done
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D)
Calcium
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question_answer 243) Two cells A and B are contiguous. Cell A has osmotic pressure 10 at m, turgor pressure-7 at m and diffusion pressure deficit 3 at m. Cell B has osmotic pressure 8 at m, turgor pressure 3 at m and diffusion pressure deficit 5 atm. The result will be
A)
movement of water from cell B to A
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B)
no movement of water
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C)
equilibrium between the two
done
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D)
movement of water from cell A to B
done
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question_answer 244) Which one of the following is surrounded by a callose wall?
A)
Microspore mother cell
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B)
Male gemete
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C)
Egg
done
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D)
Pollen grain
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question_answer 245) Male gametes in angiosperms are formed by the division of
A)
microspore
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B)
generative cell
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C)
vegetative cell
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D)
microspore mother cell
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question_answer 246) Which one of the following is not a bioindicator of water pollution?
A)
Sludge-worm
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B)
Blood-worm
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C)
Stone fly
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D)
Sewage fungus
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question_answer 247) Differentiation of organs and tissues in a developing organism, is associated with
A)
development mutations
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B)
differential expression of genes
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C)
lethal mutations
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D)
deletion of genes
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question_answer 248) Industrial melanism as observed in peppered moth proves that
A)
the true black melanic form arise by a recurring random mutation
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B)
the melanic form of the moth has no selective advantage over lighter form in industrial area
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C)
the lighter-form moth has no selective advantage either in polluted industrial area or non-polluted area
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D)
melanism is a pollution-generated feature
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question_answer 249) A genetically engineered microorganism used successfully in bioremediation of oil spills is a species of
A)
Pseudomonas
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B)
Trichoderma
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C)
Xanthomonas
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D)
Bacillus
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question_answer 250) About 96 per cent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen,
A)
phosphorus and sulphur
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B)
sulphur and magnesium
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C)
magnesium and sodium
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D)
calcium and phosphorus
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question_answer 251) Which one of the following pairs is mismatched?
A)
Pila globosa - Pearl
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B)
Apis indica - Honey
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C)
Kenia lacca - Lac
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D)
Bombyx mori - Silk
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question_answer 252) In which one of the following preparations, are you likely to come across cell junctions most frequently?
A)
Ciliated epithelium
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B)
Thrombocytes
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C)
Tendon
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D)
Hyaline cartilage
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question_answer 253) A person who is on a long hunger strike and is surviving only on water, will have
A)
more sodium in his urine
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B)
less amino acids in his urine
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C)
more glucose in his blood
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D)
less urea in his urine
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question_answer 254) Which pair of the following belongs to Basidiomycetes?
A)
Birds nest fungi and puff balls
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B)
Puffballs and Claviceps
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C)
Peziza and stink horns
done
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D)
Morchella and mushrooms
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question_answer 255) Spore dissemination in some liverworts is aided by
A)
elaters
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B)
indusium
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C)
calyptra
done
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D)
peristome teeth
done
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question_answer 256) Which one of the following human activities would cause least damage to the ecosystem?
A)
Organic farming
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B)
Shirting agriculture
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C)
Urban expansion
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D)
Cultivation of gentically engineered plants
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question_answer 257) The Okazaki fragments in DNA chain growth
A)
result in transcription
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B)
polymerize in the 3 to 5 direction and forms replication fork
done
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C)
prove semi-conservative nature of DNA replication
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D)
polymerize in the 5 to 3 direction and explain 3 to 5 DNA replication
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question_answer 258) Opening of floral buds into flowers is a type of
A)
autonomic movement of locomotion
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B)
autonomic movement of variation
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C)
paratonic movement of growth
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D)
autonomic movement of growth
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question_answer 259) One gene-one enzyme relationship was established for the first time in
A)
Neurospora crassa
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B)
Salmonella typhimurium
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C)
Escherichia coli
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D)
Diplococcus pneumonia
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question_answer 260) One of the important consequences of geographical isolation is
A)
no change in the isolated fauna
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B)
preventing speciation
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C)
speciation through reproductive isolation
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D)
random creation of new species
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question_answer 261) The first acceptor of electrons from an excited chlorophyll molecule of photosystem-II is
A)
cytochrome
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B)
iron-sulphur protein
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C)
ferredoxin
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D)
quinine
done
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question_answer 262) Which of the following ecosystem type has the highest annual net primary productivity?
A)
Tropical rainforest
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B)
Tropical deciduous forest
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C)
Temperate evergreen forest
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D)
Temperate deciduous forest
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question_answer 263) Lysozyme that is present in perspiration, saliva and tears, destroys
A)
certain fungi
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B)
certain types of bacteria
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C)
all viruses
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D)
most virus-infected cells
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question_answer 264) Inheritance of skin colour in humans is an example of
A)
chromosomal aberration
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B)
point mutation
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C)
polygenic inheritance
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D)
codominance
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question_answer 265) In the leaves of \[{{C}_{4}}\]-plants, malic acid formation during \[C{{O}_{2}}\] fixation occurs in the cells of
A)
mesophyll
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B)
bundle sheath
done
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C)
phloem
done
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D)
epidermis
done
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question_answer 266) Which of the following is a slime mould?
A)
Rhizopus
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B)
Physarum
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C)
Thiobadllus
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D)
Anabaena
done
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question_answer 267) Which one of the following is not a constituent of cell membrane?
A)
Cholesterol
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B)
Glycolipids
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C)
Proline
done
clear
D)
Phospholipids
done
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question_answer 268) The concept of chemical evolution is based on
A)
crystallization of chemicals
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B)
interaction of water, air and clay under intense heat
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C)
effect of solar radiation on chemicals
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D)
possible origin of life by combination of chemicals under suitable environmental conditions
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question_answer 269) Which part of ovary in mammals acts as an endocrine gland after ovulation?
A)
Graafian follicle
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B)
Stroma
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C)
Germinal epithelium
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D)
Vitelline membrane
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question_answer 270) If you suspect major deficiency of antibodies in a person, to which of the following would you look for confirmatory evidence?
A)
Serum albumins
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B)
Serum globulins
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C)
Fibrinogen in the plasma
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D)
Haemocytes
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question_answer 271) In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result
A)
there is no change in success rate of fertilization
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B)
there is high degree of sterility
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C)
one can conclude that the plant is apomictic
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D)
Self-fertilization is prevented
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question_answer 272) In gymnosperms, the pollen chamber represents
A)
a cell in the pollen grain in which the sperms are formed
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B)
a cavity in the ovule in which pollen grains are stored after pollination
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C)
an opening in the megagametophyte through which the pollen tube approaches the egg
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D)
the microsporangium in which pollen grains develop
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question_answer 273) One of endangered species of Indian medicinal plants is that of
A)
Podophyllum
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B)
Ocimum
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C)
Garlic
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D)
Nepenthes
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question_answer 274) In the hexaploid wheat, the haploid (n) and basic (x) numbers of chromosomes are
A)
n = 7 and x = 21
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B)
n = 21 and x = 21
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C)
n = 21 and x = 14
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D)
n = 21 and x = 7
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question_answer 275) Which one of the following is a viral disease of poultry?
A)
Salmonellosis
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B)
Coryza
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C)
New castle disease
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D)
Pasteurellosis
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question_answer 276) During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure. What is its DNA-binding sequence?
A)
TTAA
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B)
AATT
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C)
CACC
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D)
TATA
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question_answer 277) In maize, hybrid vigour is exploited by
A)
bombarding the seeds with DNA
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B)
crossing of two inbred parental lines
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C)
harvesting seeds from the most productive plants
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D)
inducing mutations
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question_answer 278) What is true about Nereis, scorpion, cockroach and silver fish?
A)
They all have jointed paired appendages
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B)
They all possess dorsal heart
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C)
None of them is aquatic
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D)
They all belong to the same phylum
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question_answer 279) Ergot of rye is caused by a species of
A)
Phycophthora
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B)
Uncinula
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C)
Ustilago
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D)
Claviceps
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question_answer 280) Among the human ancestors, the brain size was more than 1000 cc in
A)
Homo neanderthalensis
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B)
Homo erectus
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C)
Ramapichecus
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D)
Homo habilis
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question_answer 281) The wavelength of light absorbed by \[{{P}_{r}}\] form of phytochrome is
A)
640 nm
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B)
680 nm
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C)
720 nm
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D)
620 nm
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question_answer 282) A person is having problems with calcium and phosphorus metabolism in his body. Which one of the following glands may not be functioning properly?
A)
Parathyroid
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B)
Parotid
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C)
Pancreas
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D)
Thyroid
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question_answer 283) Which one of the following is being utilized as a source of bio-diesel in the Indian countryside?
A)
Euphorbia
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B)
Beetroot
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C)
Sugarcane
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D)
Pongamia
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question_answer 284) Foolish seedling disease of rice led to the discovery of
A)
GA
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B)
ABA
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C)
2, 4-D
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D)
IAA
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question_answer 285)
Consider the following four statements (I-IV) about certain desert animals such as kangaroo rat. I. They have dark colour high rate of reproduction and excrete solid urine. II. They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs. III. They feed on dry seeds and do not require drinking water. IV. They excrete very concentrated urine and do not use water to regulate body temperature
Which two of the above statements for such animals are true?
A)
III and IV
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B)
II and III
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C)
III and I
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D)
I and II
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question_answer 286) In DNA molecule
A)
the total amount of purine nucleotides and pyrimidine nucleotides is not always equal
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B)
there are two strands, which run parallel in the \[5\to 3\] direction
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C)
the proportion of adenine in relation to thymine varies with the organism
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D)
there are two strands, which run antiparallel-one in \[5\to 3\] direction and other in \[3\to 5\]
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question_answer 287) Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin of life?
A)
They were able to reproduce
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B)
They could separate combinations of molecules from the surroundings
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C)
They were partially isolated from the surroundings
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D)
They could maintain an internal environment
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question_answer 288) Which one of the following pair of items correctly belongs to the category of organs mentioned against it?
A)
Thorns of-Analogous organs Bougainvillea and tendrils of Cucurbita
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B)
Nictitating-Vestigial organs membrane and blind spot in human eye
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C)
Nephridia of- Excretory organs earthworm and Malpighian tubules of cockroach
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D)
Wings of honey bee-Homologous organs and wings of crow
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question_answer 289) Which one of the following phyla is correctly matched with its two general characteristics?
A)
Arthropoda-Body divided into head, thorax and abdomen and respiration by tracheae
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B)
Chordata-Notochord at some stage and separate anal and urinary openings to the outside
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C)
Echinoder-Pentamerous radial mata symmetry and mostly internal fertilization
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D)
Mollusca - Normally oviparous and development through a trochophore or veliger larva
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question_answer 290) Wobble nypothesis was given by
A)
FHC Crick
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B)
Nirenberg
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C)
Holley
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D)
Khurana
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question_answer 291) Ascaris is characterized by
A)
absence of true coelom but presence of metamerism
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B)
presence of neither true coelom nor metamerism
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C)
presence of true coelom but absence of metamerism
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D)
presence of true coelom and metamerism (metamerisation)
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question_answer 292)
A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this. I. Lots of urea and phosphate fertilizer were used in the crops in the vicinity. II. The area was sprayed with DDT by an aircraft. III. The lake water turned green and stinky. IV. Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis.
Which two of the above were the main causes of fish mortality in the lake?
A)
II, III
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B)
III, IV
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C)
I, III
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D)
I, II
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question_answer 293) Trichoderma harzianum has proved a useful microorganism for
A)
bioremediation of contaminated soils
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B)
reclamation of wastelands
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C)
gene transfer in higher plants
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D)
biological control of soil-borne plant pathogens
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question_answer 294) Quercus species are the dominant component in
A)
temperate deciduous forests
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B)
alpine forests
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C)
scrub forests
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D)
tropical rain forests
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question_answer 295) A transgenic food crop, which may help in solving the problem of night blindness in developing countries is
A)
Flavr savr tomatoes
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B)
Starlink maize
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C)
Bt soybean
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D)
golden rice
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question_answer 296) Which one of the following pairs of plants structures has haploid number of chromosomes?
A)
Megaspore mother cell and antipodal cells
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B)
Egg cell and antipodal cells
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C)
Nucellus and antipodal cells
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D)
Egg nucleus and secondary nucleus
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question_answer 297) Gel electrophoresis is used for
A)
cutting of DNA into fragments
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B)
separation of DNA fragments according to their size
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C)
construction of recornbinant DNA by joining with cloning vectors
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D)
isolation of DNA molecule
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question_answer 298) Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in
A)
vessels and tracheid differentiation
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B)
leaf abscission
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C)
annual plants
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D)
floral parts
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question_answer 299) What will happen if the secretion of parietal cells of gastric gland is blocked with an inhibitor?
A)
Gastric juice will be deficient in chymosin
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B)
Gastric juice will be deficient in pepsinogen
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C)
In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin
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D)
Enter kinase will not be released from the duodenal mucosa and so trypsinogen is not converted to trypsin
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question_answer 300) The length of different internodes in a culm of sugarcane is variable because of
A)
shoot apical meristem
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B)
position of axillary buds
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C)
size of leaf lamina at the node below each internode
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D)
intercalary meristem
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