If h is height and g is acceleration due to gravity, then the dimensional formula of \[\sqrt{\frac{2h}{g}}\] is the same as that of -
A)
time
done
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B)
mass
done
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C)
volume
done
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D)
velocity
done
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View Answer play_arrow
Two forces, each numerically equal to 5 N, are acting as shown in the Fig. Then the resultant is-
A)
2.5 N
done
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B)
5 N
done
clear
C)
\[5\sqrt{3}\] N
done
clear
D)
10 N.
done
clear
View Answer play_arrow
A ball is rolled off the edge of a horizontal table at a speed of 4 m/s. It hits the ground after 0.4 sec. Which statement given below is true?
A)
It hits the ground at a horizontal distance 1.6m from the edge of the table
done
clear
B)
The speed with which it hits the ground is 4.0 m/s
done
clear
C)
Height of the table is 0.9 m
done
clear
D)
It hits the ground at an angle of \[60{}^\circ \] to the horizontal
done
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View Answer play_arrow
Fig. shows the acceleration-time graph of a particle. Which of the following represents the corresponding velocity-time graph?
A)
done
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B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
The acceleration of a particle increases linearly with time t as '6t'. If the initial velocity of the particle is zero and the particle starts from the origin, then the distance travelled by the particle in time t will be -
A)
t
done
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B)
\[{{t}^{2}}\]
done
clear
C)
\[{{t}^{3}}\]
done
clear
D)
\[{{t}^{4}}\]
done
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View Answer play_arrow
A ball of mass m moving with a velocity u rebounds from a wall with same speed. The collision is assumed to be elastic and the force of interaction between the ball and wall varies as shown. Then the value of \[{{F}_{0}}\] is -
A)
mu/T
done
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B)
2mu/T
done
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C)
4 mu/T
done
clear
D)
mu/2T
done
clear
View Answer play_arrow
In each of the three arrangements, the block of mass mi is being pulled left with constant velocity. There is no friction anywhere. The strings are light and inextensible and pulleys are massless. The ratio of the speed of the block of mass \[{{m}^{2}}\] in the three cases respectively is -
A)
2 : 1 : 4
done
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B)
2 : 4 : 1
done
clear
C)
4 : 2 : 1
done
clear
D)
None of these
done
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View Answer play_arrow
Figure below shows a man standing stationary with respect to a horizontal conveyor belt that is accelerating with 1\[m{{s}^{-2}}\]. If the coefficient of static friction between the man?s shoes and the belt is 0.2, upto what acceleration of the belt can the man continue to be stationary relative to the belt? (Mass of the man = 65 kg)
A)
1.25\[m{{s}^{-2}}\]
done
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B)
1.96 \[m{{s}^{-2}}\]
done
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C)
2.5 \[m{{s}^{-2}}\]
done
clear
D)
3.6 \[m{{s}^{-2}}\]
done
clear
View Answer play_arrow
The linear momentum of a particle varies with time t as: \[p=a+bt+c{{t}^{2}}.\] Which of the following statements is correct?
A)
Force varies with time in a quadratic manner
done
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B)
Force is time-dependent
done
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C)
The velocity of the particle is proportional to time
done
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D)
The displacement of the particle is proportional to time
done
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View Answer play_arrow
A car moves at a constant speed on a road as shown in figure. The normal force by the road on the car is NA and NB when it is at the points A and B -
A)
\[NA=NB\]
done
clear
B)
\[NA>NB\]
done
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C)
\[NA<NB\]
done
clear
D)
insufficient information
done
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View Answer play_arrow
The moment of inertia of a disc about an axis passing through its centre and normal to its plane is I. The disc is now folded along a diameter such that the two halves are mutually perpendicular. Its moment of inertia about this diameter will now be-
A)
I
done
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B)
\[I/\sqrt{2}\]
done
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C)
\[I/2\]
done
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D)
\[I/4\]
done
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View Answer play_arrow
Find the work done to take a particle of mass m from surface of the earth to a height equal to 2R -
A)
2 mg R
done
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B)
\[\frac{mgR}{2}\]
done
clear
C)
3 mg R
done
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D)
\[\frac{2mgR}{3}\]
done
clear
View Answer play_arrow
The escape velocity of a body on the surface of the earth is 11.2 km/s. If the earth's mass increases to twice its present value and radius of the earth becomes half, the escape velocity becomes-
A)
5.6 km/s
done
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B)
11.2 km/s
done
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C)
22.4 km/s
done
clear
D)
44.8 km/s
done
clear
View Answer play_arrow
The focal length of a concave mirror is f and the distance from the object to the principle focus is x. The ratio of the size of the image to the size of the object is -
A)
\[\frac{f+x}{f}\]
done
clear
B)
\[\frac{f}{x}\]
done
clear
C)
\[\sqrt{\frac{f}{x}}\]
done
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D)
\[\frac{{{f}^{2}}}{{{x}^{2}}}\]
done
clear
View Answer play_arrow
The contrast in the fringes in any interference pattern depends on-
A)
Fringe width
done
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B)
Wavelength
done
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C)
Intensity ratio of the sources
done
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D)
Distance between the sources
done
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View Answer play_arrow
A ray of light when incident upon a prism suffers a minimum deviation of\[39{}^\circ \]. If the shaded half portion of the prism is removed, then the same ray will -
A)
suffer a deviation of \[19.5{}^\circ \]
done
clear
B)
suffer a deviation of \[39{}^\circ \]
done
clear
C)
not suffer any deviation
done
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D)
will be totally internally reflected
done
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View Answer play_arrow
A ray of light falls on the surface of a spherical paper weight making an angle a with the normal and is refracted in the medium at an angle P. The angle of deviation of the emergent ray from the direction of the incident ray is -
A)
\[\left( \alpha -\beta \right)\]
done
clear
B)
\[2\text{ }(\alpha -\beta )\]
done
clear
C)
\[\left( \alpha -\beta \right)/2\]
done
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D)
\[\left( \beta -\alpha \right)\]
done
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View Answer play_arrow
A converging lens forms an image of an object on a screen. The image is real & has twice the size of the object. If the positions of the screen & the object are interchanged, leaving the lens in its original position, what is the new image size on the screen.
A)
Twice the object size
done
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B)
Same as the object size
done
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C)
Half the object size
done
clear
D)
Can?t say as it depends on the focal length of the lens
done
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View Answer play_arrow
Determine the electric field if potential of this field depends on x, y co-ordinates as \[V=10\text{ }axy-\]
A)
\[10a\left( y\widehat{i}+x\widehat{j} \right)~\]
done
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B)
\[-10a\left( y\widehat{i}\text{ }+x\widehat{j} \right)\]
done
clear
C)
\[-a\left( y\widehat{i}+x\widehat{j} \right)\]
done
clear
D)
\[-10a\left( x\widehat{i}+y\widehat{k} \right)\]
done
clear
View Answer play_arrow
Charges Q, 2Q, -Q are given to three concentric conducting spherical shells A, B & C respectively, as shown in the figure. The ratio of charges on the inner & the outer surfaces of the shell C will be -
A)
\[+\frac{3}{4}\]
done
clear
B)
\[-\frac{3}{4}\]
done
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C)
\[\frac{3}{2}\]
done
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D)
\[-\frac{3}{2}\]
done
clear
View Answer play_arrow
Capacitor \[{{C}_{1}}\,\,(10\,\,\mu F)\] and \[{{C}_{2}}(2\,\,\,\,\mu F)\] are connected in series across a 3 kV supply as shown. What is charge on capacitor \[{{C}_{1}}\] -
A)
45000 \[\mu \]C
done
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B)
20000 \[\mu \]C
done
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C)
15000 \[\mu \]C
done
clear
D)
10000 \[\mu \]C
done
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View Answer play_arrow
Figure shows two capacitors \[{{C}_{1}}\] and \[{{C}_{2}}\] connected with 10 V battery and terminal A and B are earthed. The graph shows the variation of potential as one moves from left to right. Then the ratio of \[\frac{{{C}_{1}}}{{{C}_{2}}}\] is -
A)
\[\frac{5}{2}\]
done
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B)
\[\frac{2}{3}\]
done
clear
C)
\[\frac{2}{5}\]
done
clear
D)
\[\frac{4}{3}\]
done
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View Answer play_arrow
A galvanometer of resistance 50 Q is converted into ammeter by connecting a low resistance (shunt) of value 1 Q in parallel to the galvanometer S. If full scale deflection current of galvanometer is 10 mA, then the maximum current to be measured by the ammeter is -
A)
500 mA
done
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B)
510 mA
done
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C)
610 mA
done
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D)
490 mA
done
clear
View Answer play_arrow
In the circuit shown, the potential difference between M and N is -
A)
4V
done
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B)
7V
done
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C)
8V
done
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D)
2V
done
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View Answer play_arrow
Shown in the figure is a conductor carrying a current I. The magnetic field intensity at the point O(common centre of all the three arcs) is-
A)
\[\frac{5{{\mu }_{0}}I\theta }{24\pi r}\]
done
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B)
\[\frac{{{\mu }_{0}}I\theta }{24\pi r}\]
done
clear
C)
\[\frac{11{{\mu }_{0}}I\theta }{24\pi r}\]
done
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D)
zero
done
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View Answer play_arrow
The real angle of dip, if a magnet is suspended at an angle of \[30{}^\circ \] to the magnetic meridian and the dip needle makes an angle of \[45{}^\circ \] with horizontal is
A)
\[{{\tan }^{-1}}\,\,\left( \frac{\sqrt{3}}{2} \right)\]
done
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B)
\[{{\tan }^{-1}}\,\,(\sqrt{3})\]
done
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C)
\[{{\tan }^{-1}}\,\,\left( \sqrt{\frac{3}{2}} \right)\]
done
clear
D)
\[{{\tan }^{-1}}\,\,\left( \frac{2}{\sqrt{3}} \right)\]
done
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View Answer play_arrow
The current 'i' in an inductance coil varies with time 't' according to following graph.
Which one of the following graph shows the variations of voltage in the coil?
A)
done
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B)
done
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C)
done
clear
D)
done
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View Answer play_arrow
An electron moves along the line AB with constant velocity V which lies in the same plane as a circular loop of conducting wire as shown in figure. What will be the direction of current induced if any in the loop -
A)
no current will be induced
done
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B)
induced current will be clockwise
done
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C)
induced current will be anticlockwise
done
clear
D)
the current will change direction as the electron passes by
done
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View Answer play_arrow
In series LCR circuit voltage drop across resistance is 8 volt and across capacitor is 12 volt and across inductor is 6 V. Then -
A)
Voltage of the source will be leading current in the circuit
done
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B)
Voltage drop across each element will be less than the applied voltage
done
clear
C)
Power factor of circuit will be 4/3
done
clear
D)
None of these
done
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View Answer play_arrow
A step down transformer reduces 220 V to 110 V. The primary draws 5 ampere of current and secondary supplies 9 ampere. The efficiency of transformer is-
A)
\[20%\]
done
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B)
\[44%\]
done
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C)
\[90\,%\]
done
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D)
\[100\,%\]
done
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View Answer play_arrow
Magnetic field does cause deflection in:
[A] \[\alpha -rays~\] [B] \[{{\beta }^{+}}-rays~\] [C] \[{{\beta }^{+}}-rays~\] [D] \[\gamma -rays~\]
A)
A, B
done
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B)
A, B, C
done
clear
C)
B, C, D
done
clear
D)
A, B, C, D
done
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View Answer play_arrow
In radioactivity decay according to law \[N={{N}_{0}}{{e}^{-\gamma t}}\] which of the following is/are true?
[A] Probability that a nucleus will decay is \[1-{{e}^{-\lambda t}}\] Probability that a nucleus will decay four half lives is 15/16 [C] Fraction nuclei that will remain after two half lives is zero [D] Fraction of nuclei that will remain after two half-lives is 1/4
A)
A, B
done
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B)
B, C
done
clear
C)
B, C, D
done
clear
D)
A, B, D
done
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View Answer play_arrow
What amount of energy will be produced on fission of 470 gm of \[{{U}^{235}}\] if 200 MeV of energy is obtained from fission of one nuclei-
A)
\[1.92\times {{10}^{13}}\] Joule
done
clear
B)
\[3.84\times {{10}^{13}}\] Joule
done
clear
C)
\[3.2\times {{10}^{-}}^{11}\] Joule
done
clear
D)
\[1.6\times {{10}^{-}}^{1}\] Joule
done
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View Answer play_arrow
When a monochromatic point source of light is at a distance of 0.1 m from a photoelectric cell, the cut-off voltage and the saturation current are respectively 0.9 V and 90 mA. If the same source is placed 0.3 m away from the cell, then:
[A] The stopping potential will be 0.9 V [B] The stopping potential will be 0.3 V [C] The saturation current will be 30 mA [D] The saturation current will be 10 Ma
A)
A, C
done
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B)
B, C
done
clear
C)
A, D
done
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D)
B, D
done
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View Answer play_arrow
In which of the following situations the heavier of the two particles has smaller de Broglie wavelength? The two particles:
[A] move with the same speed [B] move with the same linear momentum [C] move with the same kinetic energy [D] have fallen through the same height
A)
A, B
done
clear
B)
B, C
done
clear
C)
A, C, D
done
clear
D)
B, C, D
done
clear
View Answer play_arrow
In the network shown -
A)
the potential difference across \[{{D}_{2}}\] is 5 V
done
clear
B)
current through resistor equals 1.25 A
done
clear
C)
current through diode \[{{D}_{1}}\] is 1.25 A
done
clear
D)
current through diode \[{{D}_{2}}\] is 1.25A
done
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View Answer play_arrow
The current in the circuit having ideal diodes will be -
A)
\[\frac{3}{40}A\]
done
clear
B)
\[\frac{1}{10}A\]
done
clear
C)
\[\frac{3}{50}A\]
done
clear
D)
\[\frac{3}{10}A\]
done
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View Answer play_arrow
If the amplitude of a damped oscillator becomes half in 2 minutes, the amplitude of oscillation w.r.t. initial one after 6 minutes is-
A)
\[\frac{1}{27}\]
done
clear
B)
\[\frac{1}{8}\]
done
clear
C)
\[\frac{1}{18}\]
done
clear
D)
\[\frac{1}{64}\]
done
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View Answer play_arrow
The ratio of diameters of two wires of same material in\[n:1\]. The length of each wire is 4m. on applying the same load, the increase in length of thin wire will be \[\left( n>1 \right)\] -
A)
\[{{n}^{2}}\] times
done
clear
B)
n times
done
clear
C)
2n times
done
clear
D)
\[\left( 2n+1 \right)\] times
done
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View Answer play_arrow
A planet has mass equal to one-tenth of that of earth. Diameter of this planet is half of that of earth. Acceleration of a falling body on this planet is -
A)
9.8 \[m{{s}^{-2}}\]
done
clear
B)
1.96 \[m{{s}^{-2}}\]
done
clear
C)
3.92 \[m{{s}^{-2}}\]
done
clear
D)
4.9 \[m{{s}^{-2}}\]
done
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View Answer play_arrow
Water flows through a horizontal pipe line of varying cross-section at the rate of\[0.2\text{ }{{m}^{3}}\,{{s}^{-1}}\]. The velocity of water at a point for the area of cross-section of the pipe is 0.02 m2 is-
A)
10\[m{{s}^{-1}}\]
done
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B)
10 \[mm{{s}^{-1}}\]
done
clear
C)
10.9 \[cm{{s}^{-1}}\]
done
clear
D)
\[\infty \]
done
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View Answer play_arrow
The coefficient of linear expansion of crystal in one direction is \[{{\alpha }_{1}}\] and that in every direction perpendicular to it is 0.2. The coefficient of cubical expansion is-
A)
\[{{\alpha }_{1}}+{{\alpha }_{2}}\]
done
clear
B)
\[2{{\alpha }_{1}}+{{\alpha }_{2}}\]
done
clear
C)
\[{{\alpha }_{1}}\text{ }+\text{ }2{{\alpha }_{2}}\]
done
clear
D)
none of these
done
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View Answer play_arrow
An ideal gas is heated at constant pressure and absorbs amount of heat Q. If the adiabatic exponent is \[\gamma \], then the fraction of heat absorbed in raising the internal energy and performing the work, is -
A)
\[1-\frac{1}{\gamma }\]
done
clear
B)
\[1+\frac{1}{\gamma }\]
done
clear
C)
\[1-\frac{2}{\gamma }\]
done
clear
D)
\[1+\frac{2}{\gamma }\]
done
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View Answer play_arrow
A string of length 2 m fixed between two supports vibrates in two loops. The distance between node and antinode is -
A)
50 cm
done
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B)
10 cm
done
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C)
100 cm
done
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D)
200 cm
done
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View Answer play_arrow
Two open organ pipes of length 50 cm and 50.5 cm produce 0.3 beats/sec then the velocity of sound is -
A)
300 m/s
done
clear
B)
30 m/s
done
clear
C)
303 m/s
done
clear
D)
none of these
done
clear
View Answer play_arrow
In the reaction, \[H{{g}_{2}}S+Mn{{O}_{4}}^{-}+{{H}^{+}}\to H{{g}^{2+}}+S{{O}^{2-}}_{4}+M{{n}^{2+}}+{{H}_{2}}O\] the n-factor for \[H{{g}_{2}}S\] will be same as during conversion of-
A)
\[{{N}_{2}}\,to\text{ }N{{O}_{2}}\]
done
clear
B)
\[{{N}_{2}}{{H}_{4}}to\text{ }{{N}_{2}}{{O}_{3}}\]
done
clear
C)
\[NO\text{ }to\,HN{{O}_{3}}\]
done
clear
D)
\[N{{H}_{3\,}}to\text{ }NO\]
done
clear
View Answer play_arrow
The number of mole of oxalate ions oxidized by one mole of \[Mn{{O}_{4}}^{-}\] ion is -
A)
1/5
done
clear
B)
2/5
done
clear
C)
5/2
done
clear
D)
5
done
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View Answer play_arrow
\[0.078g\,\,Al{{\left( OH \right)}_{3}}\] is reacted with 6 milliequivalent of HCl. The equivalent of \[AlC{{l}_{3}}\] produced during the reaction are -
A)
\[{{10}^{-}}^{3}\]
done
clear
B)
\[3\,\,\times \,\,{{10}^{-}}^{3}\]
done
clear
C)
\[4\times {{10}^{-}}^{3}\]
done
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D)
\[\frac{{{10}^{-3}}}{2}\]
done
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View Answer play_arrow
When one mole of an ideal gas is compressed to half its initial volume and simultaneously heated to twice to its initial temperature, the change in entropy (AS) is -
A)
\[{{C}_{v}}\ln \,2\]
done
clear
B)
\[{{C}_{p}}\,ln\text{ }2\]
done
clear
C)
\[R\text{ }ln\,2\]
done
clear
D)
\[\left( {{C}_{v}}-R \right)\text{ }ln\text{ }2\]
done
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View Answer play_arrow
The heat released during mixing of 50 ml of \[0.1M\text{ }{{H}_{2}}S{{O}_{4}}\] with 50 ml of 0.2 M KOH is -
A)
\[57.3\times {{10}^{3\,}}J\]
done
clear
B)
573 J
done
clear
C)
\[5.73\times {{10}^{3\,}}J\]
done
clear
D)
\[57.3\times {{10}^{2\,}}J\]
done
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View Answer play_arrow
Heat of combustion of \[C{{H}_{4}},\text{ }{{C}_{2}}{{H}_{4}},\text{ }{{C}_{2}}{{H}_{6}}\] are \[-890,\text{ }-1411\text{ }and\text{ }-1560\text{ }kJ/mol\]respectively. Which has the lowest calorific fuel value?
A)
\[C{{H}_{4}}\]
done
clear
B)
\[{{C}_{2}}{{H}_{4}}\]
done
clear
C)
\[{{C}_{2}}{{H}_{6}}\]
done
clear
D)
Same for all
done
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View Answer play_arrow
2 mole of an ideal gas at \[27{}^\circ \,C\] expands isothermally & reversibly from a volume of 4 litre to 40 litre, the work done by the gas is -
A)
\[W=-28.72\text{ }kJ\]
done
clear
B)
\[W\,\,=\,\,-11.488\,kJ\]
done
clear
C)
\[W\,\,=\,\,-5.736\,kJ~~~~~\]
done
clear
D)
\[W\,\,=\,\,4.988\,kJ\]
done
clear
View Answer play_arrow
The \[{{\Delta }_{f}}H{}^\circ \] for \[C{{O}_{2}}(g),\,\,CO(g)\](g), and \[{{H}_{2}}O\] are \[-393.5,\text{ }-110.5\text{ }and\text{ }-241.8\text{ }kJ\text{ }mo{{l}^{-1}}\]respectively. The standard enthalpy change in kJ for the reaction; \[C{{O}_{2}}\left( g \right)+{{H}_{2}}\left( g \right)\,\,\to \,\,CO\left( g \right)\,\,+\,\,{{H}_{2}}O\,\left( g \right)\]is -
A)
524.1
done
clear
B)
41.2
done
clear
C)
\[-262.5\]
done
clear
D)
\[-41.2\]
done
clear
View Answer play_arrow
The value of \[\Delta H{}^\circ \] for the hypothetical reaction, \[{{A}_{2}}B\left( s \right)\,\,\to \,\,2A\left( s \right)+\frac{1}{2}\text{ }{{B}_{2}}\,\,\left( g \right)\text{ }is,\,\,+\,\,7.3\text{ }kJ\] The value of \[\Delta U{}^\circ \] for the reaction is -
A)
> 7.3 kJ
done
clear
B)
< 7.3 Kj
done
clear
C)
= 7.3 kJ
done
clear
D)
unpredictable
done
clear
View Answer play_arrow
Electromagnetic radiation of wavelength 242 nm is just sufficient to ionise the Na atom. The ionization energy in\[kJ\,mo{{l}^{-}}^{1}\]. \[(h=6.6256\times {{10}^{-}}^{34}\,Js)\]
A)
493.6 kJ \[mo{{l}^{-}}^{1}\]
done
clear
B)
13.12 kJ \[mo{{l}^{-}}^{1}\]
done
clear
C)
13.6 kJ \[mo{{l}^{-}}^{1}\]
done
clear
D)
93.6 kJ \[mo{{l}^{-}}^{1}\]
done
clear
View Answer play_arrow
The kinetic energy of an electron is \[4.55\,\,\times \,\,{{10}^{-}}^{25}\]J. Calculate the wavelength, (\[h=6.6\,\,\times \,\,{{10}^{-}}^{34}\] Js, \[m\,\,=\,\,9.1\,\,\times \,\,10{{\,}^{-31}}\]kg)
A)
\[0.725\,\,\times \,\,10{{\,}^{-~6}}m\]
done
clear
B)
\[0.345\,\,\times \,\,{{10}^{-5}}\,m\]
done
clear
C)
\[0.967\times {{10}^{-5}}\,m\]
done
clear
D)
\[0.567\times 10{{~}^{-5}}m\]
done
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View Answer play_arrow
The sulphate of a metal M contains \[9.87\,%\] of M. This sulphate is isomorphous with\[ZnS{{O}_{4}}.7{{H}_{2}}O\]. The atomic weight of M is:
A)
40.3
done
clear
B)
36.3
done
clear
C)
24.3
done
clear
D)
11.3
done
clear
View Answer play_arrow
For the reaction \[PC{{l}_{5}}\rightleftharpoons PC{{l}_{3}}+C{{l}_{2}}\] at equilibrium each of \[PC{{l}_{5}}\], \[PC{{l}_{3}}\] and \[C{{l}_{2}}\] was found to be 3 moles. If the total pressure is 3 atm. What is the value of\[{{K}_{p}}\]?
A)
1.0
done
clear
B)
3.0
done
clear
C)
4.0
done
clear
D)
6.0
done
clear
View Answer play_arrow
In the reaction \[2N{{a}_{2}}{{S}_{2}}{{O}_{3}}+{{I}_{2}}\,\,\to \,\,N{{a}_{2}}{{S}_{4}}{{O}_{6}}\,\,+\,\,2\,\,NaI\], the equivalent weight of \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\](\[mol.\,\,wt.=M\]) is equal to:
A)
M
done
clear
B)
M/2
done
clear
C)
M/3
done
clear
D)
M/4
done
clear
View Answer play_arrow
In a first order reaction the concentration of reactant decreases from 800 mol/\[d{{m}^{3}}\] to \[50\text{ }mol/d{{m}^{3}}\] is \[2\,\,\times \,\,{{10}^{2}}\] sec. The rate constant of reaction in \[sec{{\,}^{-}}^{1}\] is:
A)
\[2\,\,\times \,\,{{10}^{4}}~\]
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B)
\[3.45\times {{10}^{-}}^{5}\]
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C)
\[1.386\times {{10}^{-}}^{2}\]
done
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D)
\[2\,\,\times \,\,{{10}^{-}}^{4}\]
done
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View Answer play_arrow
Isomerization \[C{{H}_{2}}=CH-O-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\,\,\to \,\,C{{H}_{2}}=CH-C{{H}_{2}}\]\[-C{{H}_{2}}-C{{H}_{2}}OH\] follows first order kinetics. The graphical representation is as under What is the value of [k/2.303]:
A)
\[10\,{{s}^{-1}}\]
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B)
\[{{10}^{-2}}\,{{s}^{-1}}\]
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C)
\[{{10}^{-3}}\,{{s}^{-1}}\]
done
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D)
None of these
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View Answer play_arrow
Given: \[{{E}^{O}}_{F{{e}^{2+}},Fe}\,\,=\,\,a\] volt, \[\,{{E}^{O}}_{F{{e}^{3+}}\,,\,Fe}\,\,=\,\,b\] volt. What is the value of \[{{E}^{O}}_{F{{e}^{3+}}\,,\,F{{e}^{2+}}}\]
A)
\[3b-a\]
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B)
\[3b-4a\]
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C)
\[3b-2a\]
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D)
\[2a+3b\]
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View Answer play_arrow
Tincture of Iodine used as antiseptic, it is chemically\[K{{l}_{3}}\]. Select correct about KL:
A)
\[K{{I}_{3}}\] is a covalent molecule
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B)
It contain \[{{K}^{+3}}\] & \[3{{I}^{-}}\] ions
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C)
It contain \[{{K}^{+}}\And \text{ }{{I}^{-}}_{3}\] ions
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D)
It contain\[{{K}^{+}}\], \[{{I}^{-}}\] and \[{{I}_{2}}\] as a lattice molecule
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View Answer play_arrow
The correct IUPAC name of the complex \[Fe{{\left( {{C}_{5}}{{H}_{5}} \right)}_{2}}\] is -
A)
Bis(cyclopentadienylo) ferrate (II)
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B)
Bis(cyclopentadienyl) iron (II)
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C)
Dicyclopentadienyl ferrate (II)
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D)
Ferrocene
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View Answer play_arrow
For the combustion of liquid gasoline (\[{{C}_{8}}{{H}_{18}}\]) in an automobile, the signs of \[\Delta H,\text{ }\Delta S\text{ }and\text{ }\Delta G\] will respectively be
A)
+, -, +
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B)
-, -, -
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C)
-, +, +
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D)
+, +, -
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View Answer play_arrow
The enthalpies of combustion of carbon and carbon monoxide are \[-393.5\text{ }and\text{ }-283\text{ }kJ\text{ }mo{{l}^{-1}}\] respectively. The enthalpy of formation of carbon monoxide per mole is-
A)
-110.5 kJ
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B)
676.5 kJ
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C)
-676.5 kJ
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D)
110.5 kJ
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View Answer play_arrow
\[M{{g}_{2}}{{C}_{3}}\] reacts with water forming propyne, \[{{C}^{4-}}_{3}\] has-
A)
Two sigma and two pi bonds
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B)
Three sigma and one pi bonds
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C)
Two sigma and one pi bonds
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D)
Two sigma and three pi bonds
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View Answer play_arrow
Select correct statement about hydrolysis of \[BC{{l}_{3}}\] and \[NC{{l}_{3}}\] -
A)
\[NC{{l}_{3}}\] is hydrolysed and gives \[HOCl\] but \[BC{{l}_{3}}\] is not hydrolysed
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B)
Both \[NC{{l}_{3}}\] and \[BC{{l}_{3}}\] on hydrolysis gives HCl
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C)
\[NC{{l}_{3}}\] on hydrolysis gives HOCl but \[BC{{l}_{3}}\] gives \[HCl\]
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D)
Both \[NC{{l}_{3}}\] and \[BC{{l}_{3}}\] on hydrolysis gives \[HOCl\]
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View Answer play_arrow
The unit cell cube length for Lid (just like \[NaCl\] structure) is \[5.14\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]. Assuming anion- anion contact, the ionic radius for chloride ion is-
A)
\[1.815\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
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B)
\[2.8\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
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C)
\[3.8\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
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D)
\[4.815\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
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View Answer play_arrow
Molybdenum (\[At\text{ }wt.=96\text{ }g\text{ }mo{{l}^{-1}}\]) crystallizes as bcc crystal. If density of crystal is \[10.3\,\,g/c{{m}^{3}}\], then radius of Mo atom is (use \[{{N}_{A}}=6\,\,\times \,\,{{10}^{23}}\])-
A)
111 pm
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B)
314 pm
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C)
135.96 pm
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D)
None of these
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View Answer play_arrow
The complex \[{{\left[ Ni{{\left( CN \right)}_{4}} \right]}^{2-}}\] is diamagnetic and the complex \[{{\left[ NiC{{l}_{4}} \right]}^{2-}}\] is paramagnetic. What can you conclude about their molecular geometries?
A)
Both complexes have square planar geometries
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B)
Both complexes have tetrahedral geometries
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C)
\[{{\left[ NiC{{l}_{4}} \right]}^{2-}}\] has a square planar geometry while \[{{\left[ Ni{{(CN)}_{4}} \right]}^{2-}}\] has a tetrahedral geometry
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D)
\[{{\left[ NiC{{l}_{4}} \right]}^{2-}}\] has a tetrahedral geometry while \[{{\left[ Ni{{(CN)}_{4}} \right]}^{2-}}\] has a square planar geometry
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View Answer play_arrow
Isomerism exhibited by \[{{\left[ Cr{{\left( N{{H}_{3}} \right)}_{2}}{{\left( {{H}_{2}}O \right)}_{2}}C{{l}_{2}} \right]}^{+}}\] are-
A)
Linkage and coordination
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B)
Ionisation and linkage
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C)
Optical and coordination
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D)
Geometrical and optical
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View Answer play_arrow
Consider the following steps: \[C{{u}_{2}}S\,\,\xrightarrow{roast\,in\,air}\,A\,\xrightarrow{Roast\,without\,air}\,B\] Which is not the correct statement:
A)
It is salt-reduction
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B)
A is only \[C{{u}_{2}}O\] & B is a mixture of Cu & \[S{{O}_{3}}\]
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C)
A is a mixture of \[C{{u}_{2}}O\] and \[C{{u}_{2}}S\] and B is a mixture of Cu & \[S{{O}_{2}}\]
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D)
All are incorrect statement
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View Answer play_arrow
Which is not true for beryllium -
A)
Beryllium oxide is amphoteric
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B)
It forms unusual carbide \[B{{e}_{2}}C\]
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C)
\[Be{{\left( OH \right)}_{2}}\] is basic
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D)
\[BeC{{l}_{2}}\] in solid state has tetrahedral shape
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View Answer play_arrow
\[A{{g}^{+}}\] forms many complexes, some of these are \[{{\left[ Ag{{(N{{H}_{3}})}_{2}} \right]}^{+}}\,,\,\,{{\left[ Ag{{(CN)}_{2}} \right]}^{-}}\,\,and\,\,{{\left[ Ag{{({{S}_{2}}{{O}_{3}})}_{2}} \right]}^{3-}}\]. Which of the following statement is true -
A)
In these complexes, \[A{{g}^{+}}\] is a lewis base
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B)
The hybridisation of \[A{{g}^{+}}\] is \[s{{p}^{2}}\]
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C)
The \[A{{g}^{+}}\] complexes are colourful
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D)
These complexes are all linear
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View Answer play_arrow
Which of the following substance break covalent bond during melting process -
A)
SiC
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B)
Na metal
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C)
\[Si{{O}_{2}}\]
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D)
[a], [c] both
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View Answer play_arrow
Which allylic carbocation is most stable?
A)
\[C{{H}_{3}}-CH=CH-\overset{\oplus }{\mathop{C{{H}_{2}}}}\,\]
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B)
\[C{{H}_{3}}-CH=CH-\overset{\oplus }{\mathop{CH}}\,-C{{H}_{3}}\]
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C)
done
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D)
All have same stability
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View Answer play_arrow
The relative yield of the following products produced in the nitration reaction of t-butyl- benzene is:
A)
\[\left( i \right)>\left( ii \right)>\left( iii \right)\]
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B)
\[\left( ii \right)\text{ }>\text{ }\left( iii \right)\text{ }>\text{ }\left( i \right)\]
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C)
\[\left( i \right)>\left( iii \right)>\left( ii \right)\]
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D)
\[\left( iii \right)>\left( i \right)>\left( ii \right)\]
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View Answer play_arrow
Which statement is incorrect in the following?
A)
Allyl bromide gives \[{{S}_{N}}1\] reaction but vinyl chloride does not
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B)
Primary alkyl halides can give \[{{S}_{N}}1\] & \[{{S}_{N}}2\] reaction. This depends on the reagent and nature of solvent
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C)
\[C{{H}_{3}}-CH=CH-C{{H}_{2}}Cl\] reacts with KCN to give mixture of two isomeric products
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D)
\[C{{H}_{3}}-C{{H}_{2}}-O-C{{H}_{2}}Br\] is less reactive than tert. Butyl bromide for \[{{S}_{N}}1\] reaction
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View Answer play_arrow
The end product [B] will be -
A)
done
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B)
done
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C)
done
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D)
done
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View Answer play_arrow
Which of the following is not an example of tautomeric equilibrium?
A)
done
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B)
\[>CH-N-O\rightleftharpoons C=N-OH\]
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C)
done
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D)
All the above
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View Answer play_arrow
\[HCOOH\xrightarrow[\Delta ]{Ca{{(OH)}_{2}}}\,\,[A]\,\,\xrightarrow{50\,%\,\,KOH}\,[B]\,\,+\,\,\underset{(salt)}{\mathop{[C]}}\,\] Which is correct about this reaction:
A)
[A] is formaldehyde
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B)
[B] is methyl alcohol
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C)
[C] by reaction with ethyl chloride gives ethyl formate
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D)
All of the above
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View Answer play_arrow
Identify correct acidic strength order in the following compounds
A)
(i)>(ii)>(iii)
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B)
(ii) > (iii) > (i)
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C)
(i)>(iii)>(ii)
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D)
(iii) > (i) > (ii)
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View Answer play_arrow
Match column-I (reaction) with column-II (name of the reaction) and select the correct answer using the codes given below:
Column-I [a] \[2{{C}_{6}}{{H}_{5}}CHO\text{ }\xrightarrow{NaOH}\] [b] \[{{C}_{6}}{{H}_{5}}CHO\,\,+\,\,HCHO\,\,\xrightarrow{NaOH}\] [c] \[2{{C}_{6}}{{H}_{5}}CHO\,\,\xrightarrow{KCN/(alc.)}\] [d] \[{{C}_{6}}{{H}_{5}}CHO+{{(C{{H}_{3}}CO)}_{2}}O\,\xrightarrow[\Delta ]{C{{H}_{3}}COONa}\,\] Column-II (i) Benzoin condensation (ii) Self-Cannizzaro reaction (iii) Cross Cannizzaro reaction (iv) Perkin reaction
A)
a \[\to \] i; b \[\to \] ii; c \[\to \] iii; d \[\to \] iv
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B)
a \[\to \] ii; b\[\to \] iii; c \[\to \] i; d \[\to \] iv
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C)
a \[\to \] i; b \[\to \] iii; c \[\to \] iv ; d \[\to \] ii
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D)
a \[\to \] ii ; b \[\to \] iii; c \[\to \] iv ; d \[\to \] i
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View Answer play_arrow
In the given reaction
the product will be:
A)
done
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B)
done
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C)
done
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D)
done
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View Answer play_arrow
Possible product(s) will be:
A)
done
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B)
done
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C)
done
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D)
Mixture of (1) and (2)
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View Answer play_arrow
A)
done
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B)
done
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C)
done
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D)
done
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View Answer play_arrow
What is the name of the following compound?
A)
(R)-3-methylhexaneamine
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B)
(S)-3-methylhexaneamine
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C)
(R)-3-methylhexanenitrile
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D)
(S)-3-methylhexanenitrile
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View Answer play_arrow
Correct order of the reactivity of the given alcohols towards the substitution with \[(NaBr+{{H}_{2}}S{{O}_{4}})\]:
A)
(i)>(n)>(in)>(iv)
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B)
(iv) > (ii) > (i) > (iii)
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C)
(m)>(i)>(ii)>(iv)
done
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D)
(iv)>(m)>(ii)>(i)
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View Answer play_arrow
The final product of the following reaction is :
A)
done
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B)
done
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C)
done
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D)
NOTA
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View Answer play_arrow
Cells, which help in the formation of bones are called-
A)
Chondroblasts
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B)
Osteolasts
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C)
Osteoblasts
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D)
Chondroclasts
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View Answer play_arrow
Identify the given figure and select the correct option pertaining to the series A, B and C-
A)
A-Adipocyte, B-RBC, C-WBC
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B)
A- Platelets, B- WBC, C- RBC
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C)
A- RBC, B- WBC, C- Platelets
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D)
A- Macrophages, B- RBC, C- Adipocyte
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View Answer play_arrow
Each muscle is made up of long, cylindrical fibres arranged in parallel arrays. These fibres are composed of numerous fine fibrils called -
A)
Myofibrils
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B)
Microfilament
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C)
Fibroblast
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D)
None of these
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View Answer play_arrow
Which enzymes are responsible to convert the end product of partially hydrolysed food into simple absorbable forms?
A)
Enzymes of succus entericus
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B)
Proteolytic enzyme of pancreatic juice
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C)
Enzyme of gastric juice
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D)
All of the above
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View Answer play_arrow
Match the following of columns.
Column - I Column - II A. Vitamin - \[{{B}_{12}}\] 1. Pellagra B. Folic acid 2. Osteomalacia C. Niacin 3. Perneceous anaemia D. Riboflavin 4. Bleeding E. Vitamin - K 5. Anaemia F. Calciferol 6. Cheilosis
Codes
A)
[A) 3, [B] 5, [C] 1, [D] 6, [E] 4, [F] 2
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B)
[A) 3, [B] 5, [C] 6, [D] 1, [E] 4, [F] 2
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C)
[A) 3, [B] 5, [C] 1, [D] 4, [E] 6, [F] 2
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D)
[A) 5, [B] 3, [C] 1, [D] 4, [E] 4, [F] 2
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View Answer play_arrow
Actin and myosin filaments of muscles are also called-
A)
Thick and thin filaments respectively
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B)
Thin and thick filaments respectively
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C)
Black and white filaments respectively
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D)
White and black filaments respectively
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View Answer play_arrow
The electrical potential difference across the plasma membrane at the site of stimulus is called-
A)
Reaction potential
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B)
Normal potential
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C)
Action potential
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D)
Resting potential
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View Answer play_arrow
Given is the diagrammatic representation of impulse conduction through an axon (at points A and B). View the diagram and arrange the steps of impulse conduction.
I. The polarity of the membrane at site A is reversed and depolarized i.e. the outer surface becomes negatively charged and the innerside becomes positively charged, generating nerve impulse. II. A stimulus causes disturbance to the membrane at site of A nerve fibre resulting in leakage of \[N{{a}^{+}}\] ions inside the nerve fibre. III. On the outer surface, current flows from site B to site A to complete the circuit of current flow. Hence the polarity at the site is reversed, and an action potential is generated at site B. The impulse (action potential) generated at site A arrives at site B. The sequence is repeated along the length of the axon and consequently the impulse is conducted. IV. Immediately ahead, the axon (e.g. site B) membrane has a positive charge on the outer surface and a negative charge on its inner surface. As a result, a current flows on the inner surface from site A to site B.
The correct option is -
A)
\[I\to II\,\,\to IV\,\to \,\,III\]
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B)
\[II\,\,\to \,\,I\,\,\to III\to IV\]
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C)
\[II\,\,\to \,\,I\to IV\,\,\to \,\text{ }III\]
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D)
\[I\,\,\to \,\,IV\,\,\to \,\,III\,\,\to \,\,II\]
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View Answer play_arrow
GnRh (Gonadotropi Releasing Hormone) stimulates the-
A)
Pituitary to release the gonadotropin
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B)
Pituitary for synthesis and release of gonadotropin
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C)
Testis to release the gonadotropin
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D)
Hypothalamus to release the gonadotropin
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View Answer play_arrow
Hormones originating in the hypothalamic neurons, pass through ...A... and are released from their ...B... endings. These hormones reach the ...C... gland through a ...D... circulatory system and regulate the functions of the ...E... pituitary. Select the correct combination of A, B, C, D and E in reference to above paragraph.
A)
A- axons, B- nerve, C- pituitary, D- portal, E- posterior
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B)
A- nerve, B- axon, C- pituitary, D- portal, E- anterior
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C)
A- nerves, B- axon, C- pituitary, D- portal, E- posterior
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D)
A- axons, B- nerve, C- pituitary, D- portal, E- anterior
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View Answer play_arrow
Scala vestibuli, scala media and scala tympani of human ear contains-
A)
Peril ymph. endolymph and perilymph respectively
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B)
Endolymph, Perilymph and endolymph respectively
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C)
Perilymph, endolymph and endolymph respectively
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D)
Perilymph, haemolymph and endolymph respectively
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View Answer play_arrow
Which of the following is correct for pupil of human eye?
I. It is the aperture surrounded by the iris. II. The diameter of pupil is regulated by muscle fibres of iris. III. It is a transparent crystalline structure attached to the cornea. The correct option is -
A)
Only I
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B)
Only III
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C)
I and II
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D)
I, II and III
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View Answer play_arrow
The following is required both by the process of respiration and phtosynthesis-
A)
Carbohydrates
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B)
Sunlight
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C)
Chlorophyll
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D)
Cytochromes
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Choose the incorrect match-
A)
Pigment Carotene Chromatogram Yellow to orange
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B)
Pigment Xanthophyll Chromatogram Yellow
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C)
Pigment Chlorophyll a Chromatogram Yellow green
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D)
Pigment Chlorophyll b Chromatogram Yellow green
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View Answer play_arrow
Factor not supporting oxygenation of RuBP is-
A)
High light intensity
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B)
High temperature
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C)
High \[C{{O}_{2}}\] concentration
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D)
High \[\,{{O}_{2}}\] concentration
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View Answer play_arrow
Select the incorrect statement regarding alcoholic fermentation-
A)
Less than \[7\text{ }%\] energy of glucose released
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B)
\[NAD{{H}_{2}}\] oxidized vigorously
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C)
Only 2 ATP are synthesized
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D)
Glycolysis occurs rapidly than aerobic respiration
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Respiration results into -
A)
Gain in weight
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B)
Loss in weight
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C)
No change in weight
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D)
Loss of ATP
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View Answer play_arrow
In reference of light reaction of photosynthesis, the number of incorrect statement are -
[a] ATP and NADPH2 synthesized are stored in chloroplast [b] Chemiosmosis of 2 protons from lumen to stroma leads to one ATP synthesis [c] pH of stroma is alkaline throughout the day time [d] Primary acceptor of electron of PS-II is located at periphery of grana thylakoid [e] FdNADP reductase enzyme is located in stroma thylakoid
A)
2
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B)
3
done
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C)
4
done
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D)
1
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View Answer play_arrow
When \[100%\] carbon is oxidised to \[C{{O}_{2}}\] the efficiency of such a respiration is?
A)
\[40%\]
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B)
\[60%\]
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C)
\[80%\]
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D)
\[100%\]
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View Answer play_arrow
The habit of Cabbage plant can be changed drastically by the application of-
A)
Auxin
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B)
Gibberellin
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C)
Cytokinin
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D)
ABA
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View Answer play_arrow
Substrate concentration at which an enzyme attains half of its max. velocity is?
A)
Half life of enzyme
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B)
Km-constant of enzyme
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C)
Concentration ratio
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D)
None of these
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View Answer play_arrow
Which of the following is not a parasite?
A)
Cuscuta on Ficus
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B)
Orchid on Mango
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C)
Plasmodium in Humen
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D)
Copepodes on marine fishes
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View Answer play_arrow
Population density of Cyanadon grass at your school campus can be measured by using-
A)
Counting individuals
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B)
Measuring biomass in unit area
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C)
Sample quadrate method
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D)
Pugmark method
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View Answer play_arrow
Which of the following is major conduit for energy transfer in terrestrial ecosystems?
A)
Grazing food chains
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B)
Predator food chains
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C)
Detritous food chains
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D)
Parasitic food chains
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View Answer play_arrow
Which of the following is the most common cause of biodiversity loss across the globe?
A)
Habitat loss and fragmentation
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B)
Over exploitation
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C)
Alien species invasion
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D)
Coextinction
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View Answer play_arrow
In a grazing food chain of aquatic ecosystem polluted by DDT having concentration of 0.003 ppb in water. The concentration of DDT in large fishes would be-
A)
25 ppm
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B)
0.04 ppm
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C)
2 ppm
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D)
5 ppm
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View Answer play_arrow
Which of the following is not a impact of global warming?
A)
Repetation ofAlnino and La-nina effects
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B)
Increase in crop production of \[{{C}_{3}}\] crops
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C)
Sprading of diseases like Dengue and Malaria world wide
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D)
Submerging of costal areas
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View Answer play_arrow
Regarding to phenylketonuria which of the following statement is wrong?
A)
Phenylalanine cannot convert into tyrosine
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B)
Phenylalanine convert into phenylpymvate and derivatives
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C)
Phenylpyruvate deposited in heart, liver and kidney
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D)
This is inborn error of metabolism
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View Answer play_arrow
Which type of growth present in muscle -
A)
Auxetic
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B)
Mutiplicative
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C)
Accretionery
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D)
All the above
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View Answer play_arrow
Which type of growth present in bone and cartilage-
A)
Auxetic
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B)
Accretionery
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C)
Multiplicative
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D)
All the above
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View Answer play_arrow
Which test in used to defect typhoid?
A)
Widal Test
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B)
ELISA Test
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C)
P.C.R. Test
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D)
Western Blot Test
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View Answer play_arrow
Which drug is used in pyrexia?
A)
Paracetamol
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B)
Cetrizine
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C)
Alprazolam
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D)
Diazepam
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View Answer play_arrow
Which of the following category of photosynthetic plants posses minimum transpiration ratio (TR).
A)
\[{{C}_{3}}\] -Plants
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B)
\[{{C}_{4}}\] -Plants
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C)
CAM-Plants
done
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D)
All the above
done
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View Answer play_arrow
Reason for trisomy in down?s syndrome -
A)
Non disjunction during sperm formation
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B)
Non disjunction during egg formation
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C)
Non disjunction at the time of egg or sperm formation
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D)
Addition of one extra chromosome during mitosis
done
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View Answer play_arrow
A completely radioactive double stranded DNA molecule undergoes two round of raplication in a non-radioactive medium. What will be the radioactive status of the four doughter molecules-
A)
All four still contain radioactivity
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B)
Radioactivity is lost from all four
done
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C)
Out of four, three contain radioactivity
done
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D)
Half of the number contain no radioactivity
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Which one of the following is a correct statement?
A)
'Bt' in 'Bt-cotton' indicates that it is a genetically modified organism produced through biotechnology.
done
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B)
Somatic hybridization involves fusion of two complete plant cells carrying desired genes.
done
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C)
The anticoagulant hirudin is being produced from transgenic Brassica napus seeds.
done
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D)
'Flavr Savr' variety of tomato has enhanced the production of ethylene which improves its taste.
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Which of these are correct in view of genetic engineering?
A)
It uses resistant plasmid pBR322
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B)
DNA molecules are broken down by topoisomerase
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C)
The recombined DNA or r-DNA is called chimeric DNA
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D)
Both [a] and [c]
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What change occurs by changing one base in DNA?
A)
Always a change of one ammo acid in protein
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B)
Change in complex sequence of amino acid
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C)
Always a change in property of protein
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D)
Does not necessarily change the phenotype
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View Answer play_arrow
Molecular weight of DNA in yeast is -
A)
\[2.56\times {{10}^{9}}\]
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B)
\[0.5\times {{10}^{9}}\]
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C)
\[7\,\,\times \,\,{{10}^{7}}\]
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D)
\[6\,\,\times \,\,{{10}^{6}}\]
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The nucleus is separated from surrounding cytoplasm by a nuclear membrane, which is-
A)
Single layered with pores
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B)
Single layered without pores
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C)
Double layered with pores
done
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D)
Double layered without pores
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The two subunits of ribosome remain united at a critical ion level of -
A)
Copper
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B)
Manganese
done
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C)
Magnesium
done
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D)
Calcium
done
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View Answer play_arrow
In fluid mosaic model of plasma membrane-
A)
Upper layer is non-polar and hydrophilic
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B)
Polar layer is hydrophobic
done
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C)
Phospholipids form a bimolecular layer middle part
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D)
Proteins form a middle layer
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View Answer play_arrow
In the somatic cell cycle -
A)
In \[{{G}_{1}}\] phase, DNA content is double the amount of DNA present in the original cell
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B)
DNA replication takes place in S phase
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C)
A short interphase is followed by a long mitotic phase
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D)
\[{{G}_{2}}\] phase follows mitotic phase
done
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View Answer play_arrow
Identify the pair that does not match-
A)
Terminalisation - Diakinesis
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B)
Short thick chromosome - Pachytene
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C)
End result of meiosis chromosomes - New genetic recombination
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D)
Longest period of meiosis - Telophase-II
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Which event occur only in meiosis not in mitosis?
A)
Chromatid formation
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B)
Chromosome condensation
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C)
Chromosome movement to poles
done
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D)
Chromosome pairing
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Healing of wounds is done in plants by the activity of-
A)
Apical meristem
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B)
Lateral meristem
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C)
Premordial meristem
done
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D)
Intercalary meristem
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View Answer play_arrow
Centripetal xylem arrangement occurs in-
A)
Roots
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B)
Stems
done
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C)
Both [a] and [b]
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D)
None of these
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Sclerenchymatous sheath surrounding the vascular bundles in a monocot stem, is called-
A)
Vascular sheath
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B)
Circular sheath
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C)
Bundle sheath
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D)
Starch sheath
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View Answer play_arrow
Which of the following statements is true?
A)
The collenchyma occurs in layers below the epidermis in monocotyledonous plants
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B)
Sclerenchyma cells are usually dead and without protoplasts
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C)
Xylem parenchyma cells are living and thin walled and their cell walls are made up of lignin
done
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D)
The companion cells are specialized sclerenchymatous cells
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The function of root cap is-
A)
Protection of root tip and control of geotropic movement
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B)
Storage of food products
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C)
Absorption of nutrients
done
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D)
None of the above
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View Answer play_arrow
Identify the false statement-
A)
Phylloclades are photosynthetic in function
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B)
Pitcher of Nepenthes is a modification of stem
done
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C)
Bulb of garlic and onion have greatly reduced stem
done
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D)
Cladode is found in Asparagus
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View Answer play_arrow
Which of the following is not correct?
A)
Carrot Modified tap root
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B)
Sweet potato Prop root
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C)
Maize Stilt root
done
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D)
Rhizophora Pneumatophores
done
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View Answer play_arrow
Tetradynamous condition is found in -
A)
Asteraceae
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B)
Malvaceae
done
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C)
Papilionatae
done
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D)
Brassicaceae
done
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View Answer play_arrow
A student sets up an experiment on photosynthesis as follows:
He takes soda water in a glass tumbler and add a chlorophyll into the contents and keeps the tumbler exposed to sunlight hoping that he has provided necessary ingredients for photosynthesis to proceed (viz.\[C{{O}_{2}}\,\,\,{{H}_{2}}O\] chlorophyll and light). What do you think what happen after say a few hours of exposers of light?
A)
Photosynthesis will take place and glucose will be produced
done
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B)
Photosynthesis will take place and starch will be produced which turn the mixture turbid
done
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C)
Photosynthesis will not take place because \[C{{O}_{2}}\] dissolved in soda water escapes into the atmosphere
done
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D)
Photosynthesis will not take place because intact chloroplasts are needed for the process
done
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View Answer play_arrow
In hierarchial classification, class occupied a place between
A)
kingdom and phylum
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B)
order and family
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C)
phylum and order
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D)
family and genus
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State whether the given statements are true or false.
I. Bacteria shows both autotrophic and heterotrophic nutrition. II. Some of the bacteria are autotrophic. They may be photosynthetic autotrophic or chemosynthetic autotrophic. III. Heterotrophic nutrition involves the obtaining of readymade organic nutrients from outside sources.
A)
I and II are true
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B)
I is true, II and III is false
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C)
I, II and III are true
done
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D)
I, II and III are false
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Red tides in warm coastal water develops due to the presence of-
A)
Dinoflagellates
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B)
Euglenoid farms
done
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C)
Diatoms and desmids
done
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D)
Slime moulds
done
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Fungi show sexual reproduction by all of the following processes except-
A)
Oospores
done
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B)
Ascospores
done
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C)
Basidiospores
done
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D)
Zoospores
done
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View Answer play_arrow
Mushroom belongs to class-
A)
Phycomycetes
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B)
Zygomycetes
done
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C)
Basidiomycetes
done
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D)
Deuteromycetes
done
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View Answer play_arrow
Which type of chloroplasts are present in the members of class-chlorophyceae?
A)
Discoid and plate-like
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B)
Reticulate and cup-shaped
done
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C)
Spiral or ribbon-shaped
done
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D)
All of the above
done
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The plant body of bryophytes are thallus like, prostrate or erect and attached to substratum with the help of -
A)
unicellular or multicellular roots
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B)
unicellular or multicellular rhizoids
done
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C)
multicellular roots
done
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D)
unicellular roots
done
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View Answer play_arrow
Which of the following statements is wrong about bryophytes?
A)
Fertilisation takes place in presence of water
done
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B)
Gametophytic place is dominant in life cycle
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C)
Sporophyte is physiologically dependent on gametophyte
done
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D)
Zygote undergoes meiosis to produce sporophyte
done
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Read carefully the following statements about pteridophytes.
I. They are called vascular cryptogams. II. They produce spores rather than seeds. III. They are used for medicinal purposes. IV. They are used as soil binders, V. They are frequently grown as ornaments.
Which of the statements given above are correct?
A)
I, II and V
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B)
II, IV and V
done
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C)
II, III, IV and V
done
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D)
I, II, III, IV and V
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View Answer play_arrow
Anemophilly type of pollination is found in-
A)
Salvia
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B)
Bottle brush
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C)
Vallisneria
done
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D)
Coconut
done
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View Answer play_arrow
What does the filiform apparatus do at the entrance into ovule?
A)
It brings about opening of the pollen tube
done
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B)
It guides pollen tube from a synergid to
done
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C)
It helps in the entry of pollen tube into a synergid
done
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D)
It prevents entry of more than one pollen tube into the embryo sac
done
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View Answer play_arrow
A bacterium with completely radioactive DNA was allowed to replicate in a non-radioactive medium for two generation what % of the bacteria should contain radioactive DNA-
A)
\[100%~\]
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B)
\[50%\]
done
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C)
\[25%\]
done
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D)
\[12.5%\]
done
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View Answer play_arrow
Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called-
A)
Xenogamy
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B)
Geitonogamy
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C)
Karyogamy
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D)
Autogamy
done
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View Answer play_arrow
The heart is myogenic in -
A)
Leech
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B)
Elephant
done
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C)
Cockroach
done
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D)
All of these
done
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View Answer play_arrow
During ventricular systole-
A)
Oxygenated blood is pumped into the aorta and deoxygenated blood is pumped into the pulmonary artery
done
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B)
Oxygenated blood is pumped into the pulmonary artery and deoxygenated blood is pumped into the artery
done
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C)
Oxygenated blood is pumped into the aorta and deoxygenated blood is pumped into the pulmonary vein
done
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D)
Oxygenated blood is pumped into the pulmonary vein and deoxygenated blood is pumped into the pulmonary artery
done
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View Answer play_arrow
Blood vessel draining out the glomerulus in a mammalian nephron is called-
A)
Renal artery and is wider than the vessel entering it
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B)
Afferent arteriole and is narrower than the vessel entering it
done
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C)
Efferent venule and is narrower than the vessel entering it
done
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D)
Efferent arteriole and is narrower than the vessel entering it
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View Answer play_arrow
Brush border is characteristic of-
A)
Proximal convoluted tubule
done
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B)
DCT
done
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C)
Collecting tube
done
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D)
All of the above
done
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View Answer play_arrow
In mammals, failure of testis to descend into the scrotum is known as-
A)
Paedogenesis
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B)
Castration
done
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C)
Cryptrochidismq
done
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D)
Impotency
done
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View Answer play_arrow
Gestation period in humans is-
A)
Oweaks
done
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B)
25 weaks
done
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C)
7 months
done
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D)
9 months
done
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View Answer play_arrow
In the 30 pregnant female AIDS patient are admit in female ward. Find out the probable number of neonates (Children) having the H.I.V. from these pregnant female-
A)
30 children
done
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B)
20 Children
done
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C)
10 children
done
clear
D)
3 children
done
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View Answer play_arrow
Correct sequence of hormone secretion from beginning of menstruation is-
A)
FSH, progesterone, estrogen
done
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B)
Estrogen, FSH, progesterone
done
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C)
FSH, estrogen, progesterone
done
clear
D)
Estrogen, progesterone, FSH
done
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View Answer play_arrow
Division of human egg is-
A)
Equal holoblastic
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B)
Unequal holoblastic
done
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C)
Superficial meroblastic
done
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D)
Discoidal meroblastic
done
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View Answer play_arrow
Identify the wrong statement from the following
A)
High levels of estrogen triggers the ovulatory surge
done
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B)
Oocyte cells start to proliferate and give rise to functional ova in regular cycles from puberty onwards
done
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C)
Sperms released from seminiferous tubules are poorly motile
done
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D)
Progesterone level is high during the post ovulatory phase of menstrual cycle
done
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View Answer play_arrow
Most important component of oral contraceptive is-
A)
Thyroxine
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B)
LH
done
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C)
Progesterone
done
clear
D)
Estrogen
done
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View Answer play_arrow
Copper-T prevents -
A)
Ovulation
done
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B)
Fertilization
done
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C)
Zygote formation
done
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D)
Implantation
done
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View Answer play_arrow
What is correct about test tube baby?
A)
Fertilization inside female genital tract and growth in test tube
done
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B)
Rearing of prematurely born baby in incubator
done
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C)
Fetilization outside and gestation inside womb of mother
done
clear
D)
Both fertilization and development are effected outside the female genital tract
done
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View Answer play_arrow
In earthworm the nerve cord in anterior region ...[a]... bifurcates, laterally encircling the ...[b]... and joins the ...[c]... dorsally to form ...[d]....
A)
a - 2nd segment,
b - oesophagus,
c - ganglion,
d - nerve ring
done
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B)
a - 3rd & 4th segment,
b - laterally,
c - pharynx,
d - nerve ring
done
clear
C)
a - 3rd & 4th segment,
b-pharynx,
c - cerebral ganglion,
d - nerve ring
done
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D)
a - 2nd & 3rd segment,
b - oesophagus,
c - cerebral ganglion,
d - nerve ring
done
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View Answer play_arrow
Each cocoon produces .... [a]... baby worm with an average of.... [b]....
A)
a-9-10, b-6
done
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B)
a-2-20, b-4
done
clear
C)
a- 5-10, b-4
done
clear
D)
a- 2-20, b-6
done
clear
View Answer play_arrow
Match the column-
Column - I Column - II i. Septal nephridia a. 15th to last segment ii. Integumentary nephrida b. 3rd to last segment iii. Forest of nephridia c. Clitellum iv. Calciferous gland d. Stomach
A)
Only One matching is correct
done
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B)
Only Two matching are correct
done
clear
C)
Only Three matching are correct
done
clear
D)
All Four matching are correct
done
clear
View Answer play_arrow
Sensory organs of frog are-
Sensory papillae \[\to \] organ of touch Taste organ \[\to \] as taste bud Smell organ \[\to \] as nasal epithelium Vision organ \[\to \] eye Internal ear \[\to \] for hearing and balancing Out of these select those organs which are cellular aggregation around nerve ending-
A)
(i), (ii), (iv)
done
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B)
(i), (iii), (iv)
done
clear
C)
(ii), (iii), (iv)
done
clear
D)
(i), (ii), (iii)
done
clear
View Answer play_arrow
Ootheca of cockroach is ... [a]... capsule and each otheca contains ...[b]... eggs
A)
[a]. Dark reddish to blackish brown,
[b]. 14-16
done
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B)
[a]. Dark reddish to yellowing brown,
[b]. 14-16
done
clear
C)
[a]. Dark reddish to blackish brown,
[b]. 10-20
done
clear
D)
[a]. Dark reddish to blackish brown,
[b]. 3-8
done
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View Answer play_arrow
Heart with one atrium and one ventricle is present in-
A)
Ascidia
done
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B)
Pristis
done
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C)
Icthiophis
done
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D)
Amphioxus
done
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View Answer play_arrow
Body surface of annelids is distinctly marked into-
A)
Proglottid
done
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B)
Metamer
done
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C)
Pseudosegments
done
clear
D)
None of above
done
clear
View Answer play_arrow
Feather like gills present in-
A)
Arthropods
done
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B)
Annelida
done
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C)
Hemichordata
done
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D)
Mollusca
done
clear
View Answer play_arrow
Organism with external fertilization one of-
A)
Ctenophora
done
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B)
Echinodermata
done
clear
C)
Hemichordata
done
clear
D)
All of above
done
clear
View Answer play_arrow
Which of the following plants grow by a single ?apical cell?-
A)
Monocots
done
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B)
Dicots
done
clear
C)
Gymnosperms
done
clear
D)
Bryophyta
done
clear
View Answer play_arrow