The velocity- time graph of a car is a semi-circle as shown in the figure. Which of the following statement is correct?
A)
The car must move in circular path.
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B)
Acceleration of the car is never zero.
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C)
The mean speed of the car is\[\frac{\pi }{4}\,m/s.\]
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D)
The car makes a turn once during its motion.
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A particle is moving eastward with a velocity 10 m/s. In 10 s the velocity changes to 10 m/s northwards. The average acceleration during this time is:
A)
\[\sqrt{2}\,m/{{s}^{2}}N-W\]
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B)
\[\frac{1}{2}\,m/{{s}^{2}}\,N-W\]
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C)
\[\sqrt{2}\,m/{{s}^{2}}\,N-E\]
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D)
0
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The point from where a ball is projected is taken as the origin of the coordinate axes. The\[x\]and y components of its displacement are given by\[x=6t\]and \[y=8t-5{{t}^{2}}.\]What is the velocity of projection?
A)
\[~6\text{ }m{{s}^{-1}}\]
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B)
\[~8\text{ }m{{s}^{-1}}\]
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C)
\[10\text{ }m{{s}^{-1}}\]
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D)
\[~14\text{ }m{{s}^{-1}}\]
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A ball is projected upwards from the top of a tower with a velocity of 50 m/s making in angle of \[30{}^\circ \] with the horizontal. The height of the tower is 70 m. After how many seconds from the instant of throwing, will the ball reach the ground? (Take\[g=10\,m/{{s}^{2}}\])
A)
2s
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B)
5 s
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C)
7s
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D)
9 s
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A particle is projected from the ground with an initial speed of v at an angle\[\theta \] with horizontal. The magnitude of the average velocity of the particle between its point of projection and highest point of trajectory is:
A)
\[\frac{v}{2}\sqrt{1+2{{\cos }^{2}}\theta }\]
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B)
\[\frac{v}{2}\sqrt{1+2{{\cos }^{2}}\theta }\]
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C)
\[\frac{v}{2}\sqrt{1+3{{\cos }^{2}}\theta }\]
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D)
\[v\cos \theta \]
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The diagram shows a venturimeter through which water is flowing. The speed of water at X is\[2\,cm/{{s}^{-1}}.\]. The speed of water at Y (taking\[g=1000\,cm/{{s}^{-2}}\]) is:
A)
\[23\,cm/{{s}^{-1}}\]
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B)
\[32\,cm/{{s}^{-1}}\]
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C)
\[101\,cm/{{s}^{-1}}\]
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D)
\[1024\,cm/{{s}^{-1}}\]
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An incompressible liquid flows through a horizontal tube as shown in the adjoining figure. Then the velocity v of the fluid is:
A)
3.0 m/s
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B)
1.5 m/s
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C)
1.0 m/s
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D)
2.25 m/s
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A message signal of frequency \[{{\omega }_{m}}\]is superposed or a carrier wave of frequency \[{{\omega }_{c}}\]to get an amplitude modulated wave (AM), The frequency of the AM wave will be
A)
\[{{\omega }_{m}}\]
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B)
\[{{\omega }_{c}}\]
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C)
\[\frac{{{\omega }_{c}}+{{\omega }_{m}}}{2}\]
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D)
\[\frac{{{\omega }_{c}}-{{\omega }_{m}}}{2}\]
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Two concentric spheres of radii R and r have similar charges with equal surface densities \[(\sigma ).\]What is the electric potential at their common center?
A)
\[\frac{\sigma }{{{\varepsilon }_{0}}}\]
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B)
\[\frac{\sigma }{{{\varepsilon }_{0}}}(R-r)\]
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C)
\[\frac{\sigma }{{{\varepsilon }_{0}}}(R+r)\]
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D)
None of the above.
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A solid conducting sphere having a charge Q is surrounded by an uncharged concentric conducting spherical shell. The potential difference between the surface of solid sphere and shell is V. The shell is now given a charge -3Q. The new potential difference between the same surfaces will be
A)
V
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B)
2V
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C)
4V
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D)
-IV
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View Answer play_arrow
In the circuit shown in the figure
A)
The current through NP is 0.5 A
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B)
The value of \[{{R}_{1}}=20\Omega \]
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C)
The value of \[R=14\Omega \]
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D)
The potential difference across R = 49 V
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A charged particles a uniform magnetic field with velocity vector making an angle of \[30{}^\circ \] with the magnetic field. The particle describes a helical trajectory of pitch \[x.\]The radius of the helix is
A)
\[\frac{x}{2\pi }\]
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B)
\[\frac{x}{2\sqrt{2}\pi }\]
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C)
\[\frac{x}{2\sqrt{3}\pi }\]
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D)
\[\frac{\sqrt{3}x}{2\pi }\]
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View Answer play_arrow
A ball is projected horizontally from the top of a tower with a velocity of \[4\text{ }m{{s}^{-1}}.\] The velocity of I the ball after\[0.7\text{ }s\,(g=10\,m{{s}^{-2}})\]
A)
\[11\text{ }m{{s}^{-1}}\]
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B)
\[~10\text{ }m{{s}^{-1}}\]
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C)
\[~8\text{ }m{{s}^{-1}}\]
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D)
\[~3\text{ }m{{s}^{-1}}\]
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A particle of mass m strikes a wall at an angle of incidence \[60{}^\circ \] with velocity b elastically. The impulse is
A)
\[mv\]
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B)
\[m\frac{v}{2}\]
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C)
\[-2\,m\,v\]
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D)
0
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View Answer play_arrow
A force of 100 N is applied on a block of mass 3 kg as shown in the figure. The coefficient of friction between the wall and block is\[1/4\] .The frictional force acting on the block is
A)
20 N downwards
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B)
25 N upwards
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C)
15 N downwards
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D)
20 N upwards
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Find the force exerted by 5 kg block on floor of lift, as shown in the figure. (Take\[g=10\text{ }m/{{s}^{2}}\])
A)
100 N
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B)
200 N
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C)
105 N
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D)
210 N
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A man wants to reach point B on the opposite bank of a river flowing at a speed as shown in the figure. What minimum speed relative to water should the man have so that he can reach point B?
A)
\[u\sqrt{2}\]
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B)
\[\frac{u}{\sqrt{2}}\]
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C)
\[2u\]
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D)
\[\frac{u}{2}\]
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The acceleration of a train between two stations 2 km apart is shown in the figure. The maximum speed of the train is:
A)
60 m/s
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B)
30 m/s
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C)
120 m/s
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D)
90 m/s
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View Answer play_arrow
A force \[\vec{F}=3\hat{i}-2\hat{j}+4\hat{k}\]displaces an object from a point P (1, 1, 1) to another point Q (2, 0, 3). The work done by force is:
A)
10 J
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B)
12 J
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C)
13 J
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D)
None of these
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View Answer play_arrow
The figure shows a block of mass m kept on inclined plane with inclination \[\theta .\] The tension in the string is:
A)
8 N
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B)
10 N
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C)
0.8 N
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D)
0
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View Answer play_arrow
The efficiency of a Carnot engine operating between temperatures of \[100{}^\circ C\] and \[-23{}^\circ C\] will be
A)
\[\frac{100-23}{273}\]
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B)
\[\frac{100+23}{273}\]
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C)
\[\frac{100+23}{100}\]
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D)
\[\frac{100-23}{100}\]
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In the given circuit, the readings of the voltmeter \[{{V}_{1}}\] and the ammeter A are
A)
220 V, 2.2 A
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B)
110 V, 1.1 A
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C)
220 V, 1.1 A
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D)
110 V, 2.2 A
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Two identical p-n junctions may be connected in series with a battery in three ways as shown. The potential drops across the two p-n junctions are equal in
A)
circuit 1 and circuit 2.
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B)
circuit 2 and circuit 3.
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C)
circuit 3 and circuit 1.
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D)
circuit 1 only.
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A circular coil of radius 0.1 m has 80 turns of wire. If the magnetic field through the coil increases from 0 to 2 Tesla in 0.4 sec and the coil is connected to a\[11\,\Omega \] resistor, what is the current (in A) through the resistor during the 0.4 sec interval?
A)
\[\left( \frac{8}{7} \right)A\]
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B)
\[\left( \frac{7}{8} \right)A\]
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C)
\[8\,A\]
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D)
\[7\,A\]
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View Answer play_arrow
In a uniform magnetic field of induction B, a wire in the form of a semi-circle of radius r rotates about the diameter of the circle with angular frequency\[\omega .\]The axis of rotation is perpendicular to the field. If the total resistance of the circuit is R, the mean power generated per period of rotation is:
A)
\[\frac{{{(B\pi r\omega )}^{2}}}{2R}\]
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B)
\[\frac{B\pi {{r}^{2}}\omega }{2R}\]
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C)
\[\frac{B\pi {{r}^{2}}\omega }{8R}\]
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D)
\[\frac{{{(B\pi r{{\omega }^{2}})}^{2}}}{8R}\]
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A galvanometer is connected to the secondary coil. The galvanometer shows an instantaneous maximum deflection of 7 divisions when a current is started in the primary coil of the solenoid. Now, if the primary coil is rotated through \[180{}^\circ C\], then the new instantaneous maximum deflection will be:
A)
7 divisions,
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B)
14 divisions.
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C)
0 divisions,
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D)
21 divisions.
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In Young's double experiment carried out with light of wavelength \[\lambda =5000\,\overset{\text{o}}{\mathop{\text{A}}}\,,\]the distance between the slits is 0.2 mm and the screen is at 200 cm from the plane of slits. The central maximum is at \[x=0.\]The third maximum will be at x equal to:
A)
1.67 cm
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B)
1.5 cm
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C)
0.5 cm
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D)
5.0 cm
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Two uniform strings A and B made of steel an made to vibrate under the same tension. If the firs overtone of A is equal to the second overtone of I. and if the radius of A is twice that of B, the ratio of the lengths of the strings is:
A)
2:1
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B)
3:2
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C)
3:4
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D)
1:3
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A cylindrical tube partially filled with water is in resonance with a tuning fork when height of air column is 0.1 m. When the level of water is lowered, the resonance is again observed at 0.35 m. The end correction is:
A)
0.025 m
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B)
0.015 m
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C)
0.001 m
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D)
0.002 m
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The angular velocities of three bodies in simple harmonic motion are \[{{\omega }_{1}},{{\omega }_{2}},{{\omega }_{3}}\]with respective amplitudes as\[{{A}_{1}},{{A}_{2}},{{A}_{3}}\]If all the three bodies have the same mass and maximum speeds, then:
A)
\[{{A}_{1}}{{\omega }_{1}}={{A}_{2}}{{\omega }_{2}}={{A}_{3}}{{\omega }_{3}}\]
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B)
\[{{A}_{1}}\omega _{1}^{2}={{A}_{2}}\omega _{2}^{2}={{A}_{3}}\omega _{3}^{2}\]
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C)
\[A_{1}^{2}{{\omega }_{1}}=A_{2}^{2}{{\omega }_{2}}=A_{3}^{2}{{\omega }_{3}}\]
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D)
\[A_{1}^{2}\sqrt{{{\omega }_{1}}}=A_{2}^{2}\sqrt{{{\omega }_{2}}}=A_{3}^{2}\sqrt{{{\omega }_{3}}}\]
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The root mean square speed of the gas molecules is 300 m/s. What will be the root mean square speed of the molecules if the atomic weight is doubled and absolute temperature is halved?
A)
300 m/s
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B)
150 m/s
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C)
600 m/s
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D)
75 m/s
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A gas is compressed at a constant pressure of \[50\text{ }N/{{m}^{2}}\] from volume of 10 m3 to a volume of \[4\text{ }{{m}^{3}}.\] Energy of 100 J is then added to the gas by heating. Its internal energy is
A)
increased by 400 J
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B)
increased by 200 J
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C)
increased by 100 J
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D)
decreased by 200 J
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When the temperature of a black body increases, it is observed that the wavelength corresponding to maximum energy changes from \[0.26\,\mu m\]to \[0.13\,\mu m.\] The ratio of the emissive powers of the body at the respective temperatures is:
A)
\[\frac{16}{1}\]
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B)
\[\frac{4}{1}\]
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C)
\[\frac{1}{4}\]
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D)
\[\frac{1}{16}\]
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70 calories of heat is required to raise the temperature of 2 moles of an ideal gas at constant pressure from \[40{}^\circ C\] to \[45{}^\circ C\] (R = 2\[cal/mol{{\,}^{-0}}C\]). The gas may be
A)
\[{{H}_{2}}\]
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B)
\[He\]
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C)
\[C{{O}_{2}}\]
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D)
\[N{{H}_{3}}\]
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View Answer play_arrow
A block attached to a spring, pulled by a constant horizontal force, is kept on a smooth surface as shown in the figure. Initially, the spring is in the natural state. Then the maximum positive work that the applied force F can do is (given that string does not break)
A)
\[\frac{{{F}^{2}}}{K}\]
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B)
\[\frac{2{{F}^{2}}}{K}\]
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C)
\[\infty \]
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D)
\[\frac{{{F}^{2}}}{2K}\]
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Two particles A and B initially at rest, move towards each other under mutual force of attraction. At the instant when the speed of A is V and the speed of B is 2F, the speed of the center of mass of the system is
A)
3V
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B)
V
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C)
1.5 V
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D)
0
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The dimension of K in the wave equation given by\[y=A\sin \omega \left( \frac{x}{V}-K \right)\]are
A)
LT
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B)
T
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C)
\[{{T}^{-1}}\]
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D)
\[{{T}^{2}}\]
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A force F is applied at the top of a ring of mass M and radius R placed on a rough horizontal surface as shown in the figure. Friction is sufficient to prevent slipping. The frictional force acting on the ring is
A)
\[\frac{F}{2}\]towards right
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B)
\[\frac{F}{3}\]towards left
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C)
\[\frac{2F}{3}\] towards right
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D)
0
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In the circuit shown in the figure. The effective capacitance between A and B is:
A)
\[3\,\mu F\]
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B)
\[2\,\mu F\]
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C)
\[4\,\mu F\]
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D)
\[8\,\mu F\]
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The maximum wavelength of a beam of light that can be used to produce photoelectric effect on a metal is 250 nm. The energy of the electrons in joule emitted from the surface of the metal when a beam of light of wavelength 200 nm is used, is
A)
\[89.61\times {{10}^{-22}}\]
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B)
\[69.81\times {{10}^{-22}}\]
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C)
\[18.96\times {{10}^{-20}}\]
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D)
\[19.86\times {{10}^{-20}}\]
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If\[{{\lambda }_{1}}\]and\[{{\lambda }_{2}}\]denote the wavelengths of de Broglie waves for electrons in Bohr's first and second orbits in the hydrogen atom, then\[{{\lambda }_{1}}/{{\lambda }_{2}}\]will be:
A)
2
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B)
\[\frac{1}{2}\]
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C)
4
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D)
\[\frac{1}{4}\]
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If the series limit wavelength of the Lyman series for hydrogen atom is \[912\overset{\text{o}}{\mathop{\text{A}}}\,\text{,}\] then the series limit wave- length for the Balmer series for the hydrogen atom is:
A)
\[912\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
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B)
\[912\,\times 2\overset{\text{o}}{\mathop{\text{A}}}\,\]
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C)
\[912\,\times 4\overset{\text{o}}{\mathop{\text{A}}}\,\]
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D)
\[\frac{912}{2}\overset{\text{o}}{\mathop{\text{A}}}\,\]
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The threshold frequency for a certain photosensitive metal is \[{{V}_{0}}.\]When it is illuminated by light of frequency \[v=2{{V}_{0}},\]the maximum velocity of photoelectrons is \[{{\upsilon }_{0}}.\]What will be the maximum velocity of the photoelectrons when the same metal is illuminated by light of frequency\[v=5{{v}_{0}}?\]
A)
\[\sqrt{2}{{v}_{0}}\]
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B)
\[2{{v}_{0}}\]
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C)
\[2\sqrt{2}{{v}_{0}}\]
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D)
\[4{{v}_{0}}\]
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View Answer play_arrow
Which energy state of doubly ionized lithium \[(L{{i}^{++}})\]has the same energy as that of the ground state of hydrogen? Given Z for lithium = 3.
A)
\[~n=1\]
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B)
\[~n=2\]
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C)
\[~n=3\]
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D)
\[~n=4\]
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A current of \[(1/4\pi )\]ampere is flowing in a long straight conductor. The line integral of magnetic field around a closed path enclosing the current carrying conductor is:
A)
\[{{10}^{-7}}\] weber per meter
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B)
\[4\pi \times {{10}^{-7}}\] weber per meter
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C)
\[16{{\pi }^{2}}\times {{10}^{-7}}\]weber per meter
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D)
0
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One mole of an ideal gas is allowed to expand reversibly and adiabatically from a temperature of \[27{}^\circ C\]. The work done is 3 kJ. The final temperature of the gas is equal to\[[{{C}_{v}}=20k{{J}^{-1}}\,]:\]
A)
450 K
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B)
150 K
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C)
600 K
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D)
300 K
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The compound used as an anti-freeze is
A)
Propanol
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B)
Ethanol
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C)
Methanol
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D)
Glycerol
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The main component of green oil fraction of coal tar is
A)
Pyrrole
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B)
Phenol
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C)
Naphthalene
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D)
Benzene
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Which of the following is not a polyamide?
A)
Protein
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B)
Glyptal
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C)
Nylon 6
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D)
Nylon 66
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The sulphide ore of copper is concentrated by
A)
Magnetic method
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B)
Froth floating method
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C)
Chemical method
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D)
None of these
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View Answer play_arrow
Le Chatelier's principle is applicable to
A)
Homogeneous reaction
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B)
Heterogeneous reaction
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C)
Irreversible reaction
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D)
System in equilibrium
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View Answer play_arrow
Normality of \[\text{0}\text{.3 M }{{\text{H}}_{\text{3}}}\text{P}{{\text{O}}_{\text{4}}}\]solution is
A)
0.6 N
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B)
0.1 N
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C)
0.3 N
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D)
0.9 N
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Physical adsorption is inversely proportional to
A)
Temperature
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B)
Concentration
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C)
Volume
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D)
All of these
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One gram of oxygen at NTP occupies a volume of
A)
0.7 L
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B)
2.8 L
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C)
1.4 L
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D)
3.5 L
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View Answer play_arrow
Bauxite is concentrated by
A)
Chemical method
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B)
Magnetic method
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C)
Froth floating process
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D)
None of these
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View Answer play_arrow
\[{{\text{P}}_{2}}{{O}_{5}}\]is an anhydride of
A)
\[HP{{O}_{3}}\]
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B)
\[{{H}_{3}}P{{O}_{4}}\]
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C)
\[{{H}_{2}}{{P}_{2}}{{O}_{7}}\]
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D)
\[{{H}_{3}}P{{O}_{3}}\]
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View Answer play_arrow
Which of the following shows electrical conduction?
A)
Cl
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B)
Na
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C)
P
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D)
Diamond
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View Answer play_arrow
\[{{H}_{2}}+C{{l}_{2}}\to 2HCl,\Delta H=-194\,kJ\]. In the above reaction the heat formation of HC1 is
A)
+97 kJ
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B)
-97 kJ
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C)
+10 kJ
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D)
-10 kJ
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The number of unpaired electron in \[1{{s}^{2}},\,2{{s}^{2}}\,2{{p}^{3}}\]is
A)
2
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B)
1
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C)
3
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D)
0
done
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Ammonia and sodium hypochlorite reacts to produce
A)
NO
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B)
\[N{{H}_{2}}N{{H}_{2}}\]
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C)
\[N{{H}_{2}}OH\]
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D)
\[{{N}_{2}}\]
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View Answer play_arrow
Oleum is a mixture of
A)
\[{{H}_{2}}{{S}_{2}}{{O}_{3}}+S{{O}_{2}}\]
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B)
\[{{H}_{2}}S{{O}_{4}}+S{{O}_{3}}\]
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C)
\[{{H}_{2}}S{{O}_{4}}+S{{O}_{2}}\]
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D)
\[{{H}_{2}}S{{O}_{4}}+S{{O}_{3}}\]
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View Answer play_arrow
When primary amine is heated with \[C{{S}_{2}}\]in the presence of excess of mercuric chloride, it produces isothiocyanate. This reaction is known as
A)
Carbylamine reaction
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B)
Hofmann bromamide reaction
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C)
Hofmann mustard oil reaction
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D)
Hinsberg's reaction
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View Answer play_arrow
The law of equilibrium was first of all given by
A)
Boyle
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B)
Guldberg
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C)
Waage
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D)
Both [a] and [c]
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View Answer play_arrow
Internal energy does not include
A)
Rotational energy
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B)
Vibrational energy
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C)
Nuclear energy
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D)
Energy due to gravitational pull
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On heating one end of a piece of metal, the other end becomes hot because of
A)
Resistance of the metal.
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B)
Mobility of atoms in the metal.
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C)
Minor perturbation in the energy of the metal.
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D)
Energized electrons moving to the other end.
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View Answer play_arrow
Nessler's reagent is used for the test of
A)
\[S{{O}_{4}}\]
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B)
\[C{{O}_{3}}\]
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C)
\[N{{H}^{+}}_{4}\]
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D)
\[C{{O}_{2}}\]
done
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View Answer play_arrow
Benzene when oxidized with\[{{V}_{2}}{{O}_{5}}\]produces
A)
Benzoic acid
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B)
Toluene
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C)
Benzaldehyde
done
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D)
Maleic anhydride
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View Answer play_arrow
The metal that does not displace hydrogen from an acid is
A)
Zn
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B)
Ca
done
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C)
Al
done
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D)
Hg
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View Answer play_arrow
During electrolysis the species that migrate to cathode are
A)
Cation
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B)
Anion
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C)
Both [a] and [b]
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D)
None of these
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View Answer play_arrow
The number of a and n bonds present in l-buten-3-yne are
A)
\[7\sigma \]and\[5\pi \]
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B)
\[6\sigma \] and\[4\pi \]
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C)
\[6\sigma \]and\[6\pi \]
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D)
\[7\sigma \]and \[3\pi \]
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View Answer play_arrow
A solution with pH of 2 has higher acidity than a solution with a pH of 6 is
A)
1000
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B)
100
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C)
10000
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D)
100000
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View Answer play_arrow
The most stable carbonium ion is
A)
\[{{C}_{6}}{{H}_{5}}\overset{+}{\mathop{C}}\,{{H}_{2}}\]
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B)
\[{{(C{{H}_{3}})}_{3}}\overset{+}{\mathop{C}}\,\]
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C)
\[C{{H}_{3}}-\underset{+}{\mathop{C}}\,{{H}_{2}}\]
done
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D)
\[{{({{C}_{6}}{{H}_{5}})}_{3}}\overset{+}{\mathop{C}}\,\]
done
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View Answer play_arrow
Dehydration of alcohol is an example of
A)
Redox reaction
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B)
Elimination reaction
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C)
Addition reaction
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D)
Substitution reaction
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View Answer play_arrow
Total number of electrons in all the p-orbitals of bromine will be
A)
5
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B)
7
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C)
15
done
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D)
17
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View Answer play_arrow
Duralumin is an alloy of
A)
Mg and Cu
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B)
Al and Cu
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C)
Al and Mg
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D)
Al, Mg, Mn and Cu
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View Answer play_arrow
The most abundant metal in the earth's crust is
A)
Al
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B)
Fe
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C)
Na
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D)
Ca
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View Answer play_arrow
The number of moles of oxygen obtained by the electrolytic decomposition of 90 g water is
A)
2.5
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B)
5
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C)
6.5
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D)
1.25
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View Answer play_arrow
A closed container contains equal number of oxygen and hydrogen molecules at a total pressure of 740 mm. If oxygen is removed from the system then the pressure will
A)
Become 1/9 of 740 mm
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B)
Become half of 740 mm
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C)
Remains unchanged
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D)
Become double of 740 mm
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View Answer play_arrow
The most acidic oxide is
A)
CaO
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B)
MgO
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C)
\[N{{a}_{2}}O\]
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D)
\[A{{l}_{2}}{{O}_{3}}\]
done
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View Answer play_arrow
Flux is used to remove
A)
Metal oxide
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B)
Silica
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C)
Silica and metal oxide
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D)
Impurities form ore
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View Answer play_arrow
The first law of thermodynamics is represented by the equation
A)
\[\Delta E =Q-W\]
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B)
\[\Delta E =O+W\]
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C)
\[Q=W+\Delta E \]
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D)
\[W=Q+\Delta E \]
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View Answer play_arrow
Ionization constant of acetic acid is \[1.8\times {{10}^{-5}}.\]The concentration of\[{{H}^{+}}\]ions in 0.1 M solution is
A)
\[1.8\times {{10}^{-3}}M\]
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B)
\[1.6\times {{10}^{-5}}M\]
done
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C)
\[CaS{{O}_{4}}.{{H}_{2}}O\]
done
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D)
\[MgS{{O}_{4}}.7{{H}_{2}}O\]
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View Answer play_arrow
Epsom salt is
A)
\[MgS{{O}_{4}}.2{{H}_{2}}O\]
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B)
\[BaS{{O}_{4}}.2{{H}_{2}}O\]
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C)
\[CaS{{O}_{4}}.{{H}_{2}}O\]
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D)
\[MgS{{O}_{4}}.7{{H}_{2}}O\]
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View Answer play_arrow
Paracetamol is an
A)
Analgesic
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B)
Antimalarial
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C)
Antipyretics
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D)
Both [a] and [c]
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View Answer play_arrow
Acetone and acetaldehyde can be identified by
A)
Bromoform test
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B)
Molisch's test
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C)
Schiff's test
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D)
Iodoform test
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View Answer play_arrow
The difference in \[{{\,}_{17}}C{{l}^{35}}\]and \[{{\,}_{17}}C{{l}^{37}}\]is of
A)
Atomic number
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B)
Number of neutron
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C)
Number of proton
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D)
Number of electron
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View Answer play_arrow
The enthalpy of combustion of \[{{C}_{6}}{{H}_{6}}\]is 3250 kJ when 0.39 g of \[{{C}_{6}}{{H}_{6}}\]is burnt in excess of oxygen in an open vessel, the amount of heat evolved is
A)
8.32 kJ
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B)
12.34 kJ
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C)
16.25 kJ
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D)
24.74 kJ
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View Answer play_arrow
\[{{C}_{6}}{{H}_{6}}\]on treatment with KOH produces
A)
\[{{C}_{6}}{{H}_{6}}\]
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B)
\[{{C}_{6}}{{H}_{6}}OH\]
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C)
\[{{C}_{6}}{{H}_{3}}C{{l}_{3}}\]
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D)
\[~{{C}_{6}}{{H}_{6}}C{{l}_{4}}\]
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View Answer play_arrow
The movement of colloidal particles towards oppositely charged electrodes of passing electricity is known as
A)
Tyndall effect
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B)
Cataphoresis
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C)
Brownian movement
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D)
None of the above
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View Answer play_arrow
Which is the colligative property?
A)
Refractive index
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B)
Osmotic pressure
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C)
Surface tension
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D)
Viscosity
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View Answer play_arrow
The common oxidation state of the elements of lanthanide series is
A)
+1
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B)
+3
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C)
+2
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D)
+4
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View Answer play_arrow
The pH of pure water at \[80{}^\circ C\] will be
A)
=7
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B)
< 7
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C)
> 7
done
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D)
None of these
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View Answer play_arrow
Producer gas is a mixture of
A)
\[{{H}_{2}}+{{N}_{2}}\]
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B)
\[CO+{{N}_{2}}\]
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C)
\[CO+{{H}_{2}}\]
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D)
\[CO+C{{O}_{2}}\]
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View Answer play_arrow
A compound has C = 40%, H =13.33% and N = 46.67. The empirical formula is
A)
\[C{{H}_{4}}N\]
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B)
\[C{{H}_{4}}{{H}_{4}}\]
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C)
\[C{{H}_{2}}N\]
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D)
\[{{C}_{2}}{{H}_{5}}N\]
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View Answer play_arrow
This alcohol manufactured from water gas is
A)
Isobutanol
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B)
Methanol
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C)
Ethanol
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D)
Butanol
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View Answer play_arrow
In his classic experiments on pea plants, Mendel did not use.
A)
Pod colour
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B)
Pod length
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C)
Flower position
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D)
Flower colour
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View Answer play_arrow
Which one of the following enzyme is responsible for transcription of snRNA in eukaryotes?
A)
RNA polymerase I
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B)
RNA polymerase II
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C)
RNA polymerase III
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D)
DNA polymerase
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View Answer play_arrow
Perisperm is
A)
Persistent nucellus
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B)
Persistent endosperm
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C)
Persistent sepals
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D)
Persistent synergids
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View Answer play_arrow
The membrane bound vesicular structure formed from Golgi apparatus and contain hydrolases.
A)
Ribosomes
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B)
Lysosomes
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C)
Mesosomes
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D)
Vacuoles
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View Answer play_arrow
The chitinous exoskeleton of arthropods is formed by the polymerization of
A)
D-Glucosamine
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B)
N-Acetylglucosamine
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C)
Lipoglycans
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D)
Keratin sulphate and chondroitin sulphate
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View Answer play_arrow
Among china rose, mustard, brinjal, potato, guava, cucumber, onion and tulip, how many plants have inferior ovary?
A)
Six
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B)
Three
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C)
Two
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D)
Four
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View Answer play_arrow
The cell junctions called tight, adhering and gap junctions are found in
A)
Connective tissue
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B)
Epithelial tissue
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C)
Neural tissue
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D)
Muscular tissue
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View Answer play_arrow
Which of the following immunoglobulins are abundantly found in colostrum?
A)
IgM
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B)
IgA
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C)
IgG
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D)
IgD
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View Answer play_arrow
In mammalian eye, the 'fovea9 is the centre of the visual field, where
A)
The optic nerve leaves the eye
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B)
Only rods are present
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C)
More rods than cones are found
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D)
Visual acuity is maximum
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View Answer play_arrow
Doctors use stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when
A)
Ventricular walls vibrate due to gushing of blood from atria.
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B)
Semilunar valves close down after the blood flows into vessels from ventricles.
done
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C)
AV node receives signal from SA node.
done
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D)
AV valves open up
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View Answer play_arrow
What is ploidy of coconut water
A)
n
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B)
2n
done
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C)
3n
done
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D)
4n
done
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View Answer play_arrow
The following are restriction enzymes except
A)
BamHI
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B)
PvuII
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C)
PstI
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D)
pBR322
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View Answer play_arrow
Which of the following structures is not found in a plant cell?
A)
Ribosome
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B)
Mesosome
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C)
Plasma membrane
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D)
Nuclear envelope
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View Answer play_arrow
Given below is a schematic break-up of the phases/ stages of cell cycle. Which one of the following is the correct indication of the stage/phase in the cell cycle?
A)
C: Karyokinesis
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B)
D: Synthetic phase
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C)
A: Cytokinesis
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D)
B: Metaphase
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View Answer play_arrow
Transpiration is affected by
A)
Temperature
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B)
Light
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C)
Wind speed
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D)
All of the above
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View Answer play_arrow
The imperfect fungi which are decomposers of litter and helps in mineral cycling belongs to
A)
Basidiomycetes
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B)
Phycomycetes
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C)
Ascomycetes
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D)
Deuteromycetes
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View Answer play_arrow
Which of the following is not a bacterial disease?
A)
Tetanus
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B)
Cholera
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C)
Typhoid
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D)
Cysticercosis
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View Answer play_arrow
The segment of DNA which participates in crossing over is
A)
Recon
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B)
Operon
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C)
Muton
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D)
Cistron
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View Answer play_arrow
Pick up the wrong statement:
A)
Protista has photo synthetic and heterotrophic modes of nutrition.
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B)
Some fungi are edible.
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C)
Nuclear membrane is present in Monera.
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D)
Cell wall is absent in Animalia.
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Peripatus is a connecting link between
A)
Mollusca and Echinodermata
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B)
Annelida and Arthropoda
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C)
Coelenterata and Porifera
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D)
Ctenophora and Platyhelminthes
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View Answer play_arrow
Which of the following events is not associated with ovulation in human female?
A)
Full development of Graafian follicle
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B)
Release of secondary oocyte
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C)
LH surge
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D)
Decrease in estradiol
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View Answer play_arrow
Which one of the following is the correct matching of three items and their grouping category?
A)
Items Group ilium, ischium, pubis coxal bones of pelvic girdle
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B)
Items Group actin, myosin, rhodopsin muscle proteins
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C)
Items Group cytosine, uracil, thiamine pyrimidines
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D)
Items Group malleus, incus, cochlea ear ossicles
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View Answer play_arrow
Match the following list of microbes and their importance:
[A] Saccharomyes (i) Production of cerevisiae immunosuppressive agents [B] Monascus Purpureus (ii) Ripening of Swiss cheese [C] Trichoderma polysporum (iii) Commercial production of ethanol [D] Propionibacterium shermanii (iv) Production of blood-cholesterol lowering agents
A)
A-iv, B-iii, C-ii, D-i
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B)
A-iv, B-ii, C-i, D-iii
done
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C)
A-iii, B-i, C-iv, D-ii
done
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D)
A-iii, B-iv, C-i, D-ii
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View Answer play_arrow
The UN conference of Parties on climate change in the year 2012 was held at
A)
Doha
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B)
Lima
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C)
Warsaw
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D)
Durban
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View Answer play_arrow
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)
Haemocytes
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C)
Serum globulins
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D)
Fibrinogen in plasma
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View Answer play_arrow
Chromatophores take part in
A)
Growth
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B)
Movement
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C)
Respiration
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D)
Photosynthesis
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View Answer play_arrow
A terminator codon which is called Amber is
A)
UGA
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B)
UAG
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C)
UAA
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D)
UUU
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View Answer play_arrow
During ecological succession which of the following takes place?
A)
The establishment of a new biotic community is very fast in its primary phase.
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B)
The numbers and types of animals remain constant.
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C)
The changes lead to a community that is in near equilibrium with the environment and is called pioneer community.
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D)
The gradual and predictable change in species composition occurs in a given area.
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View Answer play_arrow
In photorespiration the substrate is
A)
PEP
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B)
ATP
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C)
RuBP
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D)
RuBisCO
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View Answer play_arrow
Which of the following pairs is not correctly matched?
A)
Mode of reproduction Example Rhizome Banana
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B)
Mode of reproduction Example Binary fission Sargassum
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C)
Mode of reproduction Example Conidia Penicillium
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D)
Mode of reproduction Example Offset Water hyacinth
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View Answer play_arrow
In the following human pedigree, the filled symbols represent the affected individual. Identify the type of given pedigree.
A)
X-linked recessive
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B)
Autosomal recessive
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C)
X-linked dominant
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D)
Autosomal dominant
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View Answer play_arrow
Which one of the following animals has two separate circulatory pathways?
A)
Lizard
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B)
Dolphin
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C)
Shark
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D)
Frog
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View Answer play_arrow
A staminode does not possess
A)
Filament
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B)
Anther
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C)
Male gametes
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D)
Pollen grains
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View Answer play_arrow
The phenomenon which shortens the vegetative period and hastens the flowering is known as
A)
Etiolation
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B)
Vernalization
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C)
Photoperiodism
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D)
Parthenocarpy
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View Answer play_arrow
A pleiotropic gene
A)
Is a gene evolved during Pliocene
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B)
Controls a trait only in combination with another gene
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C)
Controls multiple traits in an individual
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D)
Is expressed only in primitive plants
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View Answer play_arrow
Which of the following is not a function of the skeletal system?
A)
Storage of minerals
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B)
Production of body heat
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C)
Locomotion
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D)
Production of erythrocytes
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View Answer play_arrow
A jawless fish, which lays eggs in fresh water and whose 'ammocoetes larvae' after attaining metamorphosis and returns to the ocean is
A)
Myxine
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B)
Neomyxine
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C)
Petromyzon
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D)
Eptatretus
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View Answer play_arrow
Filiform apparatus is a characteristic feature of
A)
Nucellar embryo
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B)
Aleurone cell
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C)
Synergids
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D)
Generative cell
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View Answer play_arrow
Reduction in vascular tissue, mechanical tissue and cuticle is a characteristic of
A)
Mesophytes
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B)
Epiphytes
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C)
Hydrophytes
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D)
Xerophytes
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View Answer play_arrow
A temporary endocrine gland in human is
A)
Islets of Langerhans
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B)
Pineal body
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C)
Corpora allata
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D)
Corpus luteum
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View Answer play_arrow
Which of the following is not GMO?
A)
Golden rice
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B)
Tracy
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C)
Dolly
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D)
Bt brinjal
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View Answer play_arrow
Blue revolution is
A)
Increased exploitation of aquatic product
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B)
Increased grain production
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C)
Increased beef production
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D)
Increased milk production
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View Answer play_arrow
Point mutation involves
A)
Change in single base pair
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B)
Duplication
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C)
Deletion
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D)
Insertion
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View Answer play_arrow
Which one of the following hormones though synthesized elsewhere, is stored and released by the master gland?
A)
Luteinizing hormone
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B)
Prolactin
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C)
Melanocyte stimulating hormone
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D)
Antidiuretic hormone
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View Answer play_arrow
In a population that is growing as described by the logistic growth model.
A)
The number of individuals added per unit time is greatest when N is close to zero. (The key equation is \[\frac{dn}{dt}={{r}_{\max }}N\left( \frac{K-N}{K} \right)\])
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B)
The per capital growth rate (r) increases as N approaches K.
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C)
Population growth is zero when N equals K.
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D)
The population grows exponentially when K is small.
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View Answer play_arrow
Which of these ecosystems has the lowest net primary production per square metre?
A)
A salt marsh
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B)
An open ocean
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C)
A grassland
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D)
A tropical rain forest
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View Answer play_arrow
The primary dentition in human differs from permanent dentition in not having one of the following types of teeth
A)
Premolars
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B)
Molars
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C)
Incisors
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D)
Canine
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View Answer play_arrow
The colour of flower petal is due to
A)
Xanthophyll
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B)
Anthocyanin
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C)
Carotene
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D)
Phycoerythrin
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View Answer play_arrow
The body cells in cockroach discharge their nitrogenous waste in the haemolymph mainly in the form of
A)
Potassium urate
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B)
Urea
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C)
Calcium carbonate
done
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D)
Ammonia
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View Answer play_arrow
Which of the following biomolecules does have a phosphodiester bond?
A)
Monosaccharide in a polysaccharide
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B)
Amino acids in a polypeptide
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C)
Nucleic acids in a nucleotide
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D)
Fatty acids in a diglyceride
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View Answer play_arrow
The term 'linkage' was coined by
A)
T. Boveri
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B)
G. Mendel
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C)
W. Sutton
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D)
T. H. Morgan
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View Answer play_arrow
Which one is a wrong statement?
A)
Mucor has biflagellate zoospores.
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B)
Haploid endosperm is a typical feature of gymno sperms.
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C)
Brown algae have chlorophyll a and c, and fucoxanthin.
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D)
Archegonia are found in Bryophyta, Pteridophyta and Gymno sperms.
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View Answer play_arrow
Ectopic pregnancies are referred to as
A)
Implantation of embryo side other than uterus.
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B)
Implantation of defective embryo in the uterus.
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C)
Pregnancies terminated due to hormonal imbalance.
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D)
Pregnancies with genetic abnormality.
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View Answer play_arrow
Most animals that live in deep oceanic waters are
A)
Secondary consumers
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B)
Tertiary consumers
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C)
Detritivores
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D)
Primary consumers
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View Answer play_arrow
Which of the following disease is caused by a protozoan?
A)
Influenza
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B)
Babesiosis
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C)
Blastomycosis
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D)
Syphilis
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View Answer play_arrow
In which of the following interactions both partners are adversely affected?
A)
Predation
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B)
Parasitism
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C)
Mutualism
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D)
Competition
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View Answer play_arrow
Most cells cannot harness heat to perform work because
A)
Heat is not a form of energy.
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B)
Cells do not have much heat; they are relatively cool.
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C)
Heat can never be used to do work.
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D)
Heat denatures enzymes.
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View Answer play_arrow
A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind?
A)
1
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B)
Nil
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C)
0.25
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D)
0.5
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Most \[C{{O}_{2}}\]from catabolism is released during
A)
Glycolysis
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B)
The citric acid cycle
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C)
Lactate fermentation
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D)
Electron transport
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In which of the following both pairs have correct combination?
A)
Gaseous nutrient cycle Carbon and sulphur Sedimentary nutrient cycle Nitrogen and phosphorus
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B)
Gaseous nutrient cycle Nitrogen and sulphur Sedimentary nutrient cycle Carbon and phosphorus
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C)
Gaseous nutrient cycle Sulphur and phosphorus Sedimentary nutrient cycle Carbon and nitrogen
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D)
Gaseous nutrient cycle Carbon and nitrogen Sedimentary nutrient cycle Sulphur and phosphorus
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The introduction of T-DNA into plants involves
A)
Altering the pH of soil, then heat-socking the plants.
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B)
Exposing the plants to cold for a brief period
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C)
Allowing the plant roots to stand in water.
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D)
Infection of the plant by Agrobacterium tumefaciens.
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The wings of a bird and the wings of an insect are
A)
Analogous structures and represent convergent evolution.
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B)
Phylogenetic structures and represent divergent evolution.
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C)
Homologous structures and represent convergent evolution.
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D)
Homologous structures and represent divergent evolution.
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Which of the following re-establish the continuous chain of water molecule in the xylem which often breaks under the enormous tension created by transpiration.
A)
Imbibition
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B)
Passive absorption
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C)
Root pressure
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D)
Capillary force
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Human urine is usually acidic because
A)
Excreted plasma proteins are acidic.
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B)
Potassium and sodium exchange generates acidity.
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C)
Hydrogen ions are actively secreted into the filtrate.
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D)
The sodium transporter exchange one hydrogen ion for each sodium ion, in peritubular capillaries.
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Which one of the following types of organisms occupies more than one trophic level in a pond ecosystem?
A)
Fish
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B)
Zooplankton
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C)
Frog
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D)
Phytoplankton
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The species that drive major ecosystem function is termed as
A)
Alien
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B)
Endemic
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C)
Rare
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D)
Keystone
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Select the wrong statement
A)
W. M. Stanley showed that viruses could be crystallized.
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B)
The term 'contagium vivumfluidum' was coined by M. W. Beijerinck.
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C)
Mosaic disease in tobacco and AIDS in human beings are caused by viruses.
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D)
The viroids were discovered by D. J. Ivanowsky.
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Axile placentation is present in all except
A)
Lemon
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B)
Tomato
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C)
China rose
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D)
Dianthus
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Select the correct matching:
A)
IUI - Intra Uterine Insemination
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B)
ICSI - Intra Cellular Sperm Insemination
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C)
ZIFT - Zygote Intra Fusion Transfer
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D)
GIFT - Gamete Inseminated Fallopian Transfer
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Destruction of the anterior horn cells of the spinal cord would result in the loss of
A)
Voluntary motor impulse
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B)
Commissural impulses
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C)
Integrating impulses
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D)
Sensory impulses
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Denitrification is carried out by
A)
Nitrobacter
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B)
Nitrococcus
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C)
Thiobacillus
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D)
Rhizobium
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An association of individuals of different species living in the same habitat and having functional interactions is
A)
Biotic community
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B)
Ecosystem
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C)
Population
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D)
Ecological niche
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Neural signals from which part of brain can alter respiratory mechanism
A)
Pneumotaxic centre
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B)
Chemosensitive area in medulla
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C)
Both of these
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D)
None of these
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Balbiani rings are sites of
A)
Nucleotide synthesis
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B)
Polysaccharide synthesis
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C)
RNA and protein synthesis
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D)
Carbohydrate synthesis
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Match the columns and identify the correct option.
Column I Column II [a] Thylakoids (i) Disc-shaped sacs in Golgi apparatus [b] Cristae (ii) Condensed structure of DNA [c] Cisternae (iii) Flat membranous sacs in stroma [d] Chromatic (iv) Infoldings in mitochondria
A)
A-(iii), B-(iv), C-(i), D-(ii)
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B)
A-(iii), B-(i), C-(iv), D-(ii)
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C)
A-(iii), B-(iv), C-(ii), D-(i)
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D)
A-(iv), B-(iii), C-(i), D-(ii)
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Steroidal hormones are formed in
A)
SER
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B)
RER
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C)
Lysosomes
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D)
Golgi body
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Auxin can be bioassayed by
A)
Hydroponics
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B)
Potometer
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C)
Lettuce hypocotyl elongation
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D)
Cress root inhibition test
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Which of the following layers in an antral follicle is acellular?
A)
Theca internet
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B)
Stroma
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C)
Zona pellucida
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D)
Granulosa
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Satellite DNA is important because it
A)
Shows high degree of polymorphism in population and also the same degree of polymorphism in an individual, which is heritable from parents to children.
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B)
Does not code for proteins and is same in all members of the population.
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C)
Codes for enzymes needed for DNA
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D)
Codes for proteins needed in cell
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Motile bacteria moves with the help of
A)
Pili
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B)
Fimbriae
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C)
Flagella
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D)
Cilia
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In angiosperms, microsporogenesis and genesis
A)
From gametes without further divisions
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B)
Involve meiosis
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C)
Occur in ovule
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D)
Occur in anther
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Roots play insignificant role in absorption of water in
A)
Eichhornia
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B)
Pea
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C)
Wheat
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D)
Sunflower
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Which of the following are most suitable indicators of \[S{{O}_{2}}\]pollution in the environment?
A)
Conifers
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B)
Algae
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C)
Fungi
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D)
Lichens
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An example of a seed with endosperm, perisperm and caruncle is
A)
Coffee
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B)
Lily
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C)
Castor
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D)
Cotton
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Radula, a rasping organ is found in
A)
Salpa
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B)
Ophiura
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C)
Sea Hare
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D)
Aptenodytes
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Diatomaceous earth is formed by
A)
Euglenoids
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B)
Dinoflagellates
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C)
Slime moulds
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D)
Chrysophytes
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Choose the wrong statement from the following
A)
Neurospora is used in the study of biochemical genetics.
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B)
Morels and truffles are poisonous mushrooms
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C)
Yeast is unicellular and useful in fermentation.
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D)
Penicillium is multicellular and produces antibiotics.
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Which is characterised by afluid filled cavity called antrum?
A)
Primary follicle
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B)
Secondary follicle
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C)
Tertiary follicle
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D)
Oogonia
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Natural aging of a lake by nutrient enrichment of its water is known as
A)
Cultural eutrophication
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B)
Accelerated eutrophication
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C)
Eutrophication
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D)
Biomagnification
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The physiologic values of carbohydtares, protiens and fats are respectively (in Kcal/g).
A)
4, 9, 4
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B)
9, 9, 4
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C)
4, 4, 9
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D)
9, 4, 4
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