The density of a cube is measured by measuring its mass and length of its sides. If the maximum error in the measurement of mass and length are 4% and 3% respectively, the maximum error in the measurement of density will be
A)
7%
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B)
9%
done
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C)
12%
done
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D)
13%
done
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The activity of a radioactive sample is measured as 9750 counts per minute at t = 0 and as 975 counts per minute at t = 5 minutes. The decay constant is approximately
A)
0.922 per minute
done
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B)
0.691 per minute
done
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C)
0.461 per minute
done
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D)
0.230 per minute
done
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View Answer play_arrow
Truth table for system of four NAND gates as shown in figure is
A)
done
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B)
done
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C)
done
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D)
done
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A closed organ pipe and an open organ pipe are tuned to the same fundamental frequency. What is the ratio of their lengths?
A)
1 : 2
done
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B)
2 : 1
done
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C)
2 : 3
done
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D)
4 : 3
done
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The radius R of the soap bubble is doubled under isothermal condition. If T be the surface tension of soap bubble, the work done in doing so is given by
A)
\[32\pi {{R}^{2}}T\]
done
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B)
\[24\pi {{R}^{2}}T\]
done
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C)
\[8\pi {{R}^{2}}T\]
done
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D)
\[4\pi {{R}^{2}}T\]
done
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View Answer play_arrow
The masses of the three wires of copper are in the ratio of 1: 3: 5 and their lengths are in the ratio of 5: 3: 1. The ratio of their electrical resistance is
A)
1: 3: 5
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B)
5: 3: 1
done
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C)
1: 25: 125
done
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D)
125: 15: 1
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A particle of mass m is fixed to one end of a light spring of force constant k and unstretched length \[\ell \] The system is rotated about the other end of the spring with an angular velocity \[\omega ,\] in gravity free space. The increase in length of the spring will be
A)
\[\frac{m{{\omega }^{2}}\ell }{k}\]
done
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B)
\[\frac{m{{\omega }^{2}}\ell }{k-m{{\omega }^{2}}}\]
done
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C)
\[\frac{m{{\omega }^{2}}\ell }{k+m{{\omega }^{2}}}\]
done
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D)
None of these
done
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View Answer play_arrow
Two equal masses \[{{m}_{1}}\] and \[{{m}_{2}}\] moving along the same straight line with velocities \[+\,3\,m/s\] and \[-\,5\,m/s\] respectively, collide elastically. Their velocities after the collision will be respectively
A)
\[-\,3\,m/s\] & \[+\,5\,m/s\]
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B)
\[+\,4\,m/s\] for both
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C)
\[-\,4\,m/s\]& \[+\,4\,m/s\]
done
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D)
\[-\,5\,m/s\] &\[+\,3\,m/s\]
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View Answer play_arrow
One end of uniform wire of length L and of weight W is attached rigidly to a point in the roof and a weight \[{{W}_{1}}\] is suspended from its lower end. If s is the area of cross section of the wire, the stress in the wire at a height \[\left( \frac{3L}{4} \right)\] from its lower end is
A)
\[\frac{{{W}_{1}}}{s}\]
done
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B)
\[\left[ {{W}_{1}}+\frac{W}{4} \right]s\]
done
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C)
\[\left[ {{W}_{1}}+\frac{3W}{4} \right]/s\]
done
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D)
\[\frac{{{W}_{1}}+W}{s}\]
done
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View Answer play_arrow
The maximum electric field that can be held in air without producing ionisation of air is \[{{10}^{7}}V/m.\] The maximum potential therefore, to which a conducting sphere of radius 0.10 m can be charged in air is
A)
\[{{10}^{9}}V\]
done
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B)
\[{{10}^{8}}V\]
done
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C)
\[{{10}^{7}}V\]
done
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D)
\[{{10}^{6}}V\]
done
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View Answer play_arrow
The moment of inertia of a regular circular disc of mass 0.4 kg and radius 100 cm about the axis perpendicular to the plane of the disc and passing through its centre is
A)
\[0.002\,\,kg\,{{m}^{2}}\]
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B)
\[0.02\,\,kg\,{{m}^{2}}\]
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C)
\[2\,\,kg\,{{m}^{2}}\]
done
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D)
\[0.2\,\,kg\,{{m}^{2}}\]
done
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View Answer play_arrow
Two cars of masses \[{{m}_{1}}\] and \[{{m}_{2}},\] are moving in circles of radii \[{{r}_{1}}\] and \[{{r}_{2}},\] respectively. Their speeds are such that they make complete circles in the same time (The ratio of their centripetal acceleration is
A)
\[{{m}_{1}}{{r}_{1}}:{{m}_{2}}{{r}_{2}}\]
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B)
\[{{m}_{1}}:{{m}_{2}}\]
done
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C)
\[{{r}_{1}}:{{r}_{2}}\]
done
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D)
\[1:1\]
done
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View Answer play_arrow
The block of mass M moving on the frictionless horizontal surface collides with the spring of spring constant k and compresses it by length L. The maximum momentum of the block after collision is
A)
\[\frac{k{{L}^{2}}}{2M}\]
done
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B)
\[\sqrt{Mk}\]
done
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C)
\[\frac{M{{L}^{2}}}{k}\]
done
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D)
zero
done
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View Answer play_arrow
Figure shows a small mass connected to a string, which is attached to a vertical post. If the ball is released when the string is horizontal as shown, the magnitude of the total acceleration of the mass as a function of the angle 9 is:
A)
\[g\,\,\sin \,\theta \]
done
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B)
\[g\,\,\cos \,\theta \]
done
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C)
\[g\sqrt{3{{\cos }^{2}}\theta +1}\]
done
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D)
\[g\sqrt{3{{\sin }^{2}}\theta +1}\]
done
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View Answer play_arrow
The angular velocities of three bodies in simple harmonic motion are \[{{\omega }_{1}},\]\[{{\omega }_{2}},\]\[{{\omega }_{3}}\] with their respective amplitudes as \[{{A}_{1}},\]\[{{A}_{2}},\]\[{{A}_{3}}.\] If all the three bodies have same mass and velocity, then
A)
\[{{A}_{1}}{{\omega }_{1}}={{A}_{2}}{{\omega }_{2}}={{A}_{3}}{{\omega }_{3}}\]
done
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B)
\[{{A}_{1}}^{2}{{\omega }_{1}}={{A}_{2}}^{2}{{\omega }_{2}}={{A}_{3}}^{2}{{\omega }_{3}}\]
done
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C)
\[{{A}_{1}}{{\omega }_{1}}^{2}={{A}_{2}}{{\omega }_{2}}^{2}={{A}_{3}}{{\omega }_{3}}^{2}\]
done
clear
D)
\[{{A}_{1}}^{2}{{\omega }_{1}}^{2}={{A}_{2}}^{2}{{\omega }_{2}}^{2}={{A}_{3}}^{2}{{\omega }_{3}}^{2}\]
done
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View Answer play_arrow
A pulley of radius 2 m is rotated about its axis by a force \[F=(20t-5{{t}^{2}})\]newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is \[10\,\,kg-{{m}^{2}}\] the number of rotations made by the pulley before its direction of motion is reversed, is:
A)
more than 3 but less than 6
done
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B)
more than 6 but less than 9
done
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C)
more than 9
done
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D)
less than 3
done
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View Answer play_arrow
A point charge of magnitude \[+1\mu C\] is fixed at (0, 0, 0). An isolated uncharged spherical conductor, is fixed with its center at (4, 0, 0). The potential and the induced electric field at the centre of the sphere is:
A)
\[1.8\times {{10}^{5}}V\] and\[-5.625\times {{10}^{6}}V/m\]
done
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B)
0V and 0V/m
done
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C)
\[2.25\times {{10}^{5}}V\]and\[-5.625\times {{10}^{6}}V/m\]
done
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D)
\[2.25\times {{10}^{5}}V\]and \[0\,V/m\]
done
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View Answer play_arrow
We have a galvanometer of resistance \[25\,\Omega .\] It is shunted by a \[2.5\,\Omega \] wire. The part of total current that flows through the galvanometer is
A)
\[\frac{I}{{{I}_{{}^\circ }}}=\frac{2}{11}\]
done
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B)
\[\frac{I}{{{I}_{{}^\circ }}}=\frac{1}{11}\]
done
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C)
\[\frac{I}{{{I}_{{}^\circ }}}=\frac{4}{11}\]
done
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D)
\[\frac{I}{{{I}_{{}^\circ }}}=\frac{3}{11}\]
done
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View Answer play_arrow
Consider a thermodynamic system. If \[\Delta U\] represents the increase in its internal energy and W the work done by the system, which of the following statements is true?
A)
\[\Delta U=-\]W in an adiabatic process
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B)
\[\Delta U=\]W in an isothermal process
done
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C)
\[\Delta U=-\]W in an isothermal process
done
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D)
\[\Delta U=\]W in an adiabatic process
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View Answer play_arrow
The electric field at a distance r from the centre in the space between two concentric metallic spherical shells of radii \[{{r}_{1}}\] and \[{{r}_{2}}\] carrying charge \[{{Q}_{1}}\] and \[{{Q}_{2}}\]is \[({{r}_{1}}<r<{{r}_{2}})\]
A)
\[\frac{{{Q}_{1}}+{{Q}_{2}}}{4\pi {{\in }_{0}}{{({{r}_{1}}+{{r}_{2}})}^{2}}}\]
done
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B)
\[\frac{{{Q}_{1}}+{{Q}_{2}}}{4\pi {{\in }_{0}}{{r}^{2}}}\]
done
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C)
\[\frac{{{Q}_{1}}}{4\pi {{\in }_{0}}{{r}^{2}}}\]
done
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D)
\[\frac{{{Q}_{2}}}{4\pi {{\in }_{0}}{{r}^{2}}}\]
done
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View Answer play_arrow
Light of wavelength \[200\overset{{}^\circ }{\mathop{A}}\,\] fall on aluminium surface. Work function of aluminium is 4.2 eV. What is the kinetic energy of the fastest emitted photoelectrons?
A)
2 eV
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B)
1 eV
done
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C)
4 eV
done
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D)
0.2 eV
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View Answer play_arrow
Which of the following waves have the maximum wavelength?
A)
Microwaves
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B)
UV rays
done
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C)
Radio waves
done
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D)
X - rays
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View Answer play_arrow
Impedance of circuit when a resistance R and an inductor of inductance L are connected in series in an A. C. circuit of frequency v, is
A)
\[\sqrt{{{R}^{2}}+2{{\pi }^{2}}{{v}^{2}}{{L}^{2}}}\]
done
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B)
\[\sqrt{{{R}^{2}}+4{{\pi }^{2}}{{v}^{2}}{{L}^{2}}}\]
done
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C)
\[\sqrt{R+4{{\pi }^{2}}{{v}^{2}}{{L}^{2}}}\]
done
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D)
\[\sqrt{R+2{{\pi }^{2}}{{v}^{2}}{{L}^{2}}}\]
done
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View Answer play_arrow
If the wavelength of the first line of the Balmer series in the hydrogen spectrum is \[\lambda ,\] then the wavelength of the first line of the Lyman series is
A)
\[(27/5)\lambda \]
done
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B)
\[(5/27)\lambda \]
done
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C)
\[(32/27)\lambda \]
done
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D)
\[(27/32)\lambda \]
done
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View Answer play_arrow
The effective capacitance of combination of equal capacitors between points A and B shown in figure is
A)
\[C\]
done
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B)
\[2C\]
done
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C)
\[3C\]
done
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D)
\[\frac{C}{2}\]
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View Answer play_arrow
Which one of the following is NOT a correct statement about semi-conductors?
A)
The electrons and holes have different mobilities in a semi-conductor
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B)
In an n-type semi-conductor, the Fermi level lies closer to the conduction band edge
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C)
Silicon is a direct band gap semi-conductor
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D)
Silicon has diamond structure
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The sprinkling of water reduces slightly the temperature of a closed room because temperature of water is less than that of the room
A)
specific heat of water is high
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B)
water has large latent heat of vaporization
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C)
water is a bad conductor of heat
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D)
done
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View Answer play_arrow
Two bodies of masses m and 4m are moving with equal kinetic energies. The ratio of their linear momenta will be
A)
1 : 4
done
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B)
4 : 1
done
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C)
1 : 2
done
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D)
2 : 1
done
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View Answer play_arrow
Masses of 1 kg each are placed 1 m, 2 m, 4 m, 8 m, ..... from a point P. The gravitational field intensity at P due to these masses is
A)
\[G\]
done
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B)
\[G\]
done
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C)
\[4G\]
done
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D)
\[\frac{4G}{3}\]
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View Answer play_arrow
In P- Vdiagram shown in figure ABC is a semicircle. The work done in the process ABC is
A)
\[4\,\,J\]
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B)
\[\frac{-\pi }{2}J\]
done
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C)
\[\frac{\pi }{2}J\]
done
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D)
zero
done
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View Answer play_arrow
The electric field associated with an e.m. wave in vacuum is given by \[\overrightarrow{E}=\overrightarrow{i}\,\,40\cos (kz-6\times {{10}^{8}}t),\] where E, z and t are in volt/m, meter and seconds respectively. The value of wave vector k is
A)
\[2\,\,{{m}^{-1}}\]
done
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B)
\[0.5\,{{m}^{-1}}\]
done
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C)
\[6\,{{m}^{-1}}\]
done
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D)
\[3\,{{m}^{-1}}\]
done
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View Answer play_arrow
A bullet is fired with a speed of 1500 m/s in order to hit a target 100 m away If \[g=10m/{{s}^{2}}.\]The gun should be aimed
A)
15 cm above the target
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B)
10 cm above the target
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C)
2.2 cm above the target
done
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D)
directly towards the target
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View Answer play_arrow
The point charges \[Q\] and \[-2Q\] are placed at some distance apart. If the electric field at the location of\[Q\] is \[E.\] Then, the electric field at the location of \[-2Q\] will be
A)
\[-\frac{3E}{2}\]
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B)
\[-E\]
done
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C)
\[-\frac{E}{2}\]
done
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D)
\[-2E\]
done
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View Answer play_arrow
A cell of internal resistance r is connected to an external resistance R. The current will be maximum in R, if
A)
\[R=r\]
done
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B)
\[R<r\]
done
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C)
\[R>r\]
done
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D)
\[R={r}/{2}\;\]
done
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View Answer play_arrow
A vessel of depth x is half filled with oil of refractive index \[{{\mu }_{1}}\] and the other half is filled with water of refractive index \[{{\mu }_{2.}}\] The apparent depth of the vessel when viewed from above is
A)
\[\frac{x({{\mu }_{1}}+{{\mu }_{2}})}{2{{\mu }_{1}}{{\mu }_{2}}}\]
done
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B)
\[\frac{x{{\mu }_{1}}{{\mu }_{2}}}{2({{\mu }_{1}}+{{\mu }_{2}})}\]
done
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C)
\[\frac{x{{\mu }_{1}}{{\mu }_{2}}}{({{\mu }_{1}}+{{\mu }_{2}})}\]
done
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D)
\[\frac{2x({{\mu }_{1}}+{{\mu }_{2}})}{{{\mu }_{1}}{{\mu }_{2}}}\]
done
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View Answer play_arrow
A cylindrical block of area of cross-section A and of material of density p is placed in a liquid of density one-third of density of block. The block compresses a spring and compression in the spring is one-third of the length of the block. If acceleration due to gravity is g, the spring constant of the spring is
A)
\[\rho Ag\]
done
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B)
\[2\rho Ag\]
done
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C)
\[2\rho Ag/3\]
done
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D)
\[\rho Ag/3\]
done
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View Answer play_arrow
In A.C. circuit in which inductance and capacitance are joined in series, current is found to be maximum when the value of inductance is 0.5 H and the value of capacitance is \[8\mu F.\] The angular frequency of applied alternating voltage will be
A)
\[400\,Hz\]
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B)
\[5000\,Hz\]
done
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C)
\[2\times {{10}^{5}}\,Hz\]
done
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D)
\[500\,Hz\]
done
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View Answer play_arrow
Angle between magnetic meridian and geographical meridian is called
A)
angle of dip
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B)
angle of declination
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C)
angle of depression
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D)
both [a] and [b]
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View Answer play_arrow
Heat is required to change 1 kg of ice of\[-20{}^\circ C\] into steam. \[{{Q}_{1}}\] is the heat needed to warm the ice from \[-20{}^\circ C\] to \[0{}^\circ C,\]\[{{Q}_{2}}\] is the heat needed to melt the ice, \[{{Q}_{3}}\] is the heat needed to warm the water from \[0{}^\circ C\] to \[100{}^\circ C\] and\[{{Q}_{4}}\] is the heat needed to vaporize the water. Then
A)
\[{{Q}_{4}}>{{Q}_{3}}>{{Q}_{2}}>{{Q}_{1}}\]
done
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B)
\[{{Q}_{4}}>{{Q}_{3}}>{{Q}_{1}}>{{Q}_{2}}\]
done
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C)
\[{{Q}_{4}}>{{Q}_{2}}>{{Q}_{3}}>{{Q}_{1}}\]
done
clear
D)
\[{{Q}_{4}}>{{Q}_{2}}>{{Q}_{1}}>{{Q}_{3}}\]
done
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View Answer play_arrow
One mole of an ideal gas goes from an initial state A to final state B via two processes: It first undergoes isothermal expansion from volume V to 3 V and then its volume is reduced from 3 V to V at constant pressure. The correct P- V diagram representing the two processes is :
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
A current carrying wire in the neighbourhood produces
A)
electric and magnetic field
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B)
magnetic field only
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C)
no field
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D)
electric field only
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View Answer play_arrow
10 gm of ice cubes at \[0{}^\circ C\] are released in a tumbler (water equivalent 55 g) at \[40{}^\circ C.\] Assuming that negligible heat is taken from the surroundings, the temperature of water in the tumbler becomes nearly \[(L=80{cal}/{g}\;)\]
A)
\[31{}^\circ C\]
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B)
\[22{}^\circ C\]
done
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C)
\[19{}^\circ C\]
done
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D)
\[15{}^\circ C\]
done
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View Answer play_arrow
The internal energy of an ideal gas increases during an isothermal process when the gas is
A)
expanded by adding more molecules to it
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B)
expanded by adding more heat to it
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C)
expanded against zero pressure
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D)
compressed by doing work on it
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View Answer play_arrow
A convex lens, of focal length 30 cm, a concave lens of focal length 120 cm, and a plane mirror are arranged as shown. For an object kept at a distance of 60 cm from the convex lens, the final image, formed by the combination, is a real image, at a distance of:
A)
60 cm from the convex lens
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B)
60 cm from the concave lens
done
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C)
70 cm from the convex lens
done
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D)
70 cm from the concave lens
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View Answer play_arrow
In Young's double-slit experiment, the separation between the slits is halved and the distance between the slits and the screen is doubled. The fringe width is
A)
unchanged
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B)
halved
done
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C)
doubled
done
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D)
quadrupled
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View Answer play_arrow
The number of antibonding electron pairs in \[O_{2}^{2-}\] molecular ion on the basis of molecular orbital theory are (at. no. O=8)
A)
2
done
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B)
3
done
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C)
4
done
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D)
5
done
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View Answer play_arrow
Consider the following reaction:
\[4N{{H}_{3}}(g)+5{{O}_{2}}(g)\xrightarrow{Pt(s)}4NO(g)+6{{H}_{2}}O(g)\] (i) Rate of reaction with respect to \[N{{H}_{3}}\]will be \[-\frac{1}{4}\frac{\Delta [N{{H}_{3}}]}{\Delta t}\] (ii) For the given reaction \[-\frac{1}{5}\frac{\Delta [{{O}_{2}}]}{\Delta t}=\frac{-1}{6}\frac{\Delta [{{H}_{2}}O]}{\Delta t}\] (iii) For the given reaction \[-\frac{1}{4}\frac{\Delta [N{{H}_{3}}]}{\Delta t}=\frac{1}{4}\frac{\Delta [NO]}{\Delta t}\] (iv) For the given reaction, Rate\[=-\frac{1}{4}\frac{\Delta [N{{H}_{3}}]}{\Delta t}=-\frac{1}{5}\frac{\Delta [{{O}_{2}}]}{\Delta t}\] \[=\frac{4\Delta [NO]}{\Delta t}=\frac{6\Delta [{{H}_{2}}O]}{\Delta t}\] Which of the following are the correct statements.
A)
(i) and (iv)
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B)
(i) and (iii)
done
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C)
(ii) and (iv)
done
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D)
All are correct
done
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View Answer play_arrow
Read the following statements carefully.
(i) According to a convention cell potential of hydrogen electrode (S.H.E.) is considered to be zero at all temperatures. (ii) e.m.f. of the cell \[Pt(s)/{{H}_{2}}(g,1\,\,bar)/{{H}^{+}}(aq,1M)||Z{{n}^{2+}}(aq,1M)/Zn\] is \[-0.76\]This negative value indicates that \[Z{{n}^{2+}}\]ion reduces less easily then \[{{H}^{+}}\] ions. (iii) Copper does not dissolve in HCl but dissolves in \[HN{{O}_{3}}\] as in nitric acid it gets oxidised by nitrate ion. (iv) Inert metals like Pt or Au are used in certain electrodes i.e., these metals does not participate in reaction but provide surface for oxidation and reduction reactions. (v) Fluorine has the highest electrode potential thereby making it strongest oxidising agent whereas lithium with lowest electrode potential is the weakest oxidising and strongest reducing agent. Which of the following are the correct statements above?
A)
(iv) and (v)
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B)
(i), (ii) and (iv)
done
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C)
(iii), (iv) and (v)
done
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D)
All are correct
done
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View Answer play_arrow
The transition metals have a less tendency to form ions due to:
A)
High ionisation energy.
done
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B)
Low heat of hydration of ions.
done
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C)
High heat of sublimation.
done
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D)
All of the above.
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View Answer play_arrow
\[2{{C}_{6}}{{H}_{5}}CHO\xrightarrow[{{H}_{2}}O]{O{{H}^{-}}}{{C}_{6}}{{H}_{5}}C{{H}_{2}}OH+{{C}_{6}}{{H}_{5}}CO{{O}^{-}}\] Which of the following statements are correct regarding the above reduction of benzaldehyde to benzyl alcohol?
(i) One hydrogen is coming from \[{{H}_{2}}O\] as \[{{H}^{+}}\] and another from \[{{C}_{6}}{{H}_{5}}CHO\] as \[{{H}^{-}}\] (ii) One hydrogen is coming from \[{{H}_{2}}O\] as \[{{H}^{-}}\] and another from \[{{C}_{6}}{{H}_{5}}CHO\] as \[{{H}^{+}}\] (iii) One hydrogen from \[{{H}_{2}}O\] and another from\[{{C}_{6}}{{H}_{5}}CHO,\] both in the form of\[{{H}^{-}}\] (iv) The reduction is an example of disproportionation reaction
A)
(i), (ii) and (iii)
done
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B)
(i) and (iv)
done
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C)
(ii),(iii) and (iv)
done
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D)
(iii) and (iv)
done
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View Answer play_arrow
Read the following statements and choose the correct option.
(i) The numerical value of the equilibrium constant for a reaction indicates the extent of the reaction. (ii) An equilibrium constant give information about the rate at which the equilibrium is reached. (iii) If \[{{K}_{c}}>{{10}^{3}},\] products predominate over reactants, i.e., if \[{{K}_{c}}\] is very large, the reaction proceeds nearly to completion. (iv) If \[{{K}_{c}}<{{10}^{-3}},\] reactants predominate over products, i.e., if \[{{K}_{c}}\] is very small, the reaction proceeds rarely.
A)
(i), (ii) and (iv) are correct
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B)
(i), (iii) and (iv)
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C)
(i), (ii) and (iii) are correct
done
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D)
only (iii) is correct
done
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View Answer play_arrow
The important antioxidant used in food is:
A)
BHT
done
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B)
BHC
done
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C)
BTX
done
clear
D)
All the three
done
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View Answer play_arrow
Brine is electrolysed by using inert electrodes. The reaction at anode is _____.
A)
\[C{{l}^{-}}(aq)\xrightarrow{{}}\frac{1}{2}C{{l}_{2}}(g)+{{e}^{-}};\]\[E_{cell}^{{}^\circ }=1.36V\]
done
clear
B)
\[2{{H}_{2}}O(1)\xrightarrow{{}}{{O}_{2}}(g)+4{{H}^{+}}4{{e}^{-}};\]\[E_{cell}^{{}^\circ }=1.23V\]
done
clear
C)
\[N{{a}^{+}}(aq)+{{e}^{-}}\xrightarrow{{}}Na(s);\]\[E_{cell}^{{}^\circ }=2.71V\]
done
clear
D)
\[{{H}^{+}}(aq)+{{e}^{-}}\xrightarrow{{}}\frac{1}{2}{{H}_{2}}(g);\]\[E_{cell}^{{}^\circ }=0.00V\]
done
clear
View Answer play_arrow
Geometrical isomerism is not shown by
A)
done
clear
B)
\[{{C}_{2}}{{H}_{5}}-\underset{H}{\mathop{\underset{|}{\mathop{C}}\,}}\,=\underset{H}{\mathop{\underset{|}{\mathop{C}}\,}}\,-C{{H}_{2}}I\]
done
clear
C)
\[C{{H}_{2}}=C(CI)C{{H}_{3}}\]
done
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D)
\[C{{H}_{3}}-CH=CH-CH=C{{H}_{2}}\]
done
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View Answer play_arrow
Schotten-Baumann reaction is a reaction of phenols with:
A)
Benzoyl chloride and sodium hydroxide.
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B)
Acetyl chloride and sodium hydroxide.
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C)
Salicylic acid and cone. \[{{H}_{2}}S{{O}_{4}}.\]
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D)
Acetyl chloride and cone. \[{{H}_{2}}S{{O}_{4}}.\]
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View Answer play_arrow
Which of the following statements are correct?
(i) Ionic product of water \[({{K}_{w}})=[{{H}^{+}}][O{{H}^{-}}]={{10}^{-14}}{{M}^{2}}\] (ii) At \[298K[{{H}^{+}}]=[O{{H}^{-}}]={{10}^{-7}}\] (iii) \[{{K}_{w}}\] does not depends upon temperature (iv) Molarity of pure water = 55.55M
A)
(i), (ii) and (iii)
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B)
(i), (ii) and (iv)
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C)
(i) and (iv)
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D)
(ii) and (iii)
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View Answer play_arrow
According to the adsorption theory of catalysis, the speed of the reaction increases because
A)
in the process of adsorption, the activation energy of the molecules becomes large.
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B)
adsorption produces heat which increases the speed of the reaction.
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C)
adsorption lowers the activation energy of the reaction.
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D)
the concentration of product molecules at the active centres of the catalyst becomes high due to adsorption.
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View Answer play_arrow
Consider the following reaction at \[1000{}^\circ C\] A.\[Zn(s)+\frac{1}{2}{{O}_{2}}(g)\to ZnO(s);\]\[\Delta G{}^\circ =-360kJ\,mo{{l}^{-1}}\] B. \[C\left( gr \right)+\frac{1}{2}{{O}_{2}}(g)\to CO(g);\]\[\Delta G{}^\circ =-460kJ\,mo{{l}^{-1}}\] Choose the correct statement at \[1000{}^\circ C\]
A)
zinc can be oxidised by carbon monoxide.
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B)
zinc oxide can be reduced by graphite.
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C)
both statements [a] and [b] are true.
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D)
carbon monoxide can be reduced by zinc.
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View Answer play_arrow
Consider the following complex \[[Co{{(N{{H}_{3}})}_{5}}C{{O}_{3}}]Cl{{O}_{4.}}\] The coordination number, oxidation number, number of d-electrons and number of unpaired d-electrons on the metal are respectively
A)
6, 3, 6, 0
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B)
7, 2, 7, 1
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C)
7, 1, 6, 4
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D)
6, 2, 7, 3
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View Answer play_arrow
Match List I (Reaction) with List II (Reagent) and select the correct answer using the codes given below the lists:
List I List II I. Etard reaction A. Alcoholic KOH II. Hydroxylation B. Anhydrous\[AlC{{l}_{3}}\] III. Dehydro-halogenation C. Chromyl chloride IV. Friedel-Crafts reaction D. Dilute alkaline \[KMn{{O}_{4}}\]
Codes:
A)
I\[\to \]A, II\[\to \]B, III\[\to \]C, IV\[\to \]B
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B)
I\[\to \]D, II\[\to \]C, III\[\to \]A, IV\[\to \]B
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C)
I\[\to \]C, II\[\to \]D, III\[\to \]A, IV\[\to \]B
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D)
I\[\to \]B, II\[\to \]A, III\[\to \]D, IV\[\to \]C
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View Answer play_arrow
The solubility product of AgI at \[25{}^\circ C\] is \[1.0\times {{10}^{-16}}mo{{l}^{2}}{{L}^{-2}}.\] The solubility of AgI in\[{{10}^{-4}}N\] solution of KI at \[25{}^\circ C\] is approximately (in \[mol\,{{L}^{-1}}\])
A)
\[1.0\times {{10}^{-12}}\]
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B)
\[1.0\times {{10}^{-10}}\]
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C)
\[1.0\times {{10}^{-8}}\]
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D)
\[1.0\times {{10}^{-16}}\]
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View Answer play_arrow
Match the columns
Column-I Column-II [A] \[\frac{x}{m}=k{{c}^{{1}/{n}\;}}\] (p) Adsorption varies directly with pressure [B] \[\log \frac{x}{m}=\log k+\frac{1}{n}\log p\left( \frac{1}{n}=0 \right)\] (q) Adsorption from solution phase [C] \[\log \frac{x}{m}=\log k+\frac{1}{n}\log p\left( \frac{1}{n}=1 \right)\] (r) Freudlich isotherm cannot be explained [D] \[\frac{x}{m}=k{{p}^{{1}/{n}\;}}\] (s) Adsorption is (high pressure) independent of pressure
A)
A\[\to \](q), B\[\to \](s), C\[\to \](p), D\[\to \](r)
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B)
A\[\to \](q), B\[\to \](p), C\[\to \](s), D\[\to \](r)
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C)
A\[\to \](r), B\[\to \](p), C\[\to \](s), D\[\to \](q)
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D)
A\[\to \](r), B\[\to \](s), C\[\to \](p), D\[\to \](q)
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View Answer play_arrow
Which one of the following is the correct statement?
A)
\[{{B}_{2}}{{H}_{6}}.2N{{H}_{3}}\] is known as 'inorganic benzene?.
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B)
Boric acid is a protonic acid.
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C)
Beryllium exhibits coordination number of six.
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D)
Chlorides of both beryllium and aluminium have bridged chloride structures in solid phase.
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View Answer play_arrow
Arrange the following compounds in order of decreasing acidity:
A)
\[II>IV>I>III\]
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B)
\[I>II>III>IV\]
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C)
\[III>I>II>IV\]
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D)
\[IV>III>I>II\]
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View Answer play_arrow
Teflon, styron and neoprene are all:
A)
Copolymers
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B)
Condensation polymers
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C)
Homopolymers
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D)
Monomers
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View Answer play_arrow
Values of dissociation constant, \[{{K}_{a}}\] are given as follows:
Acid \[{{K}_{a}}\] HCN \[6.2\times {{10}^{-10}}\] HF \[7.2\times {{10}^{-4}}\] \[HN{{O}_{2}}\] \[4.0\times {{10}^{-4}}\]
Correct order of increasing base strength of the base \[C{{N}^{-,}}\]\[{{F}^{-}}\] and \[NO_{2}^{-}\] will be:
A)
\[{{F}^{-}}<C{{N}^{-}}<NO_{2}^{-}\]
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B)
\[NO_{2}^{-}<C{{N}^{-}}<{{F}^{-}}\]
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C)
\[{{F}^{-}}<NO_{2}^{-}<C{{N}^{-}}\]
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D)
\[NO_{2}^{-}<{{F}^{-}}<C{{N}^{-}}\]
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View Answer play_arrow
Which of the following statement is correct if the intermolecular forces in liquids A, B and C are in the order\[A<B<C?\]
A)
B evaporates more readily than A
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B)
B evaporates less readily than C
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C)
A and B evaporate at the same rate
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D)
A evaporates more readily than C
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View Answer play_arrow
The reducing power of divalent species decreases in the order
A)
\[Ge>Sn>Pb\]
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B)
\[Sn>Ge>Pb\]
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C)
\[Pb>Sn>Ge\]
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D)
None.
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View Answer play_arrow
Sodium Carbonate cannot be used in place of \[{{(N{{H}_{4}})}_{2}}C{{O}_{3}}\] for the identification of \[C{{a}^{2+}},\]\[B{{a}^{2+}}\] and \[S{{r}^{2+}}\]ions (in group V) during mixture analysis because :
A)
\[M{{g}^{2+}}\] ions will also be precipitated.
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B)
Concentration of\[C{{O}_{3}}^{2-}\] ions is very low.
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C)
Sodium ions will react with acid radicals.
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D)
\[N{{a}^{+}}\] ions will interfere with the detection of \[C{{a}^{2+}},\]\[B{{a}^{2+}},\]\[S{{r}^{2+}}\] ions.
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View Answer play_arrow
Which of the following statements is not correct regarding aniline?
A)
It is less basic than ethylamine.
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B)
It can be steam-distilled.
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C)
It reacts with sodium to give hydrogen.
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D)
It is soluble in water.
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View Answer play_arrow
Which of the following equilibria will shift to right side on increasing the temperature?
A)
\[CO(g)+{{H}_{2}}O(g)C{{O}_{2}}(g)+{{H}_{2}}(g)\]
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B)
\[2S{{O}_{2}}(g)+{{O}_{2}}(g)2S{{O}_{3}}(g)\]
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C)
\[{{H}_{2}}O(g){{H}_{2}}(g)+\frac{1}{2}{{O}_{2}}(g)\]
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D)
\[4HCl(g)+{{O}_{2}}(g)2{{H}_{2}}O(g)+2C{{l}_{2}}(g)\]
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View Answer play_arrow
An aqueous solution of sucrose, \[{{C}_{12}}{{H}_{22}}{{O}_{11}},\] containing 34.2 g has an osmotic pressure of 2.38 atmospheres at \[17{}^\circ C.\] For an aqueous solution of glucose, \[{{C}_{6}}{{H}_{12}}{{O}_{6}}\] to be isotonic with this solution, it would have
A)
34.2 g/lit
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B)
17.1 g/lit
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C)
18.0 g/lit
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D)
36.0 g/lit of glucose
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View Answer play_arrow
Prevention of corrosion of iron by Zn coating is called:
A)
Galvanization
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B)
Cathodic protection
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C)
Electrolysis
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D)
Photoelectrolysis
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View Answer play_arrow
Aromatic character of benzene is proved by:
A)
Resonance theory.
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B)
Aromatic sextet theory.
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C)
Orbital theory.
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D)
All the above.
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View Answer play_arrow
RNA is different from DNA because RNA contains
A)
ribose sugar and thymine.
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B)
ribose sugar and uracil.
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C)
deoxyribose sugar and thymine.
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D)
deoxyribose sugar and uracil.
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View Answer play_arrow
The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 m/s is approximately
A)
\[{{10}^{-33}}\text{metres}\]
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B)
\[{{10}^{-31}}\text{metres}\]
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C)
\[{{10}^{-16}}\text{metres}\]
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D)
\[-N{{H}_{2}}\] Planck's constant, \[h=6.63\times {{10}^{-34}}Js\]
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View Answer play_arrow
AB, \[{{A}_{2}}\] and \[{{B}_{2}}\] are diatomic molecules. If the bond enthalpies of \[{{A}_{2}},\] AB and \[{{B}_{2}}\] are in the ratio 1:1:0.5 and enthalpy of formation of AB from \[{{A}_{2}}\]and \[{{B}_{2}}\] is \[-100kJ\,mo{{l}^{-1}}.\] What is the bond energy of \[{{A}_{2}}:\]
A)
\[200\,kJ\,mo{{l}^{-1}}\]
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B)
\[100\,kJ\,mo{{l}^{-1}}\]
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C)
\[300\,kJ\,mo{{l}^{-1}}\]
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D)
done
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View Answer play_arrow
Beryllium shows diagonal relationship with aluminium. Which of the following similarity is incorrect:
A)
Be forms beryllates and Al forms aluminates.
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B)
Be \[{{(OH)}_{2}}\] like \[Al{{(OH)}_{3}}\] is basic.
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C)
Be like Al is rendered passive by \[HN{{O}_{3}}.\]
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D)
\[B{{e}_{2}}C\] like \[A{{l}_{4}}{{C}_{3}}\] yields methane on hydrolysis.
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View Answer play_arrow
and
are
A)
Resonating structures
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B)
Tautomers
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C)
Geometrical isomers
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D)
Optical isomers
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View Answer play_arrow
The fatty acid which shows reducing property is
A)
Acetic acid
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B)
Ethanoic acid
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C)
Oxalic acid
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D)
Formic acid
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View Answer play_arrow
If the nitrogen atom had electronic configuration \[1{{s}^{7}}\] it would have energy lower than that of the normal ground state configuration \[1{{s}^{2}}2{{s}^{2}}2{{p}^{3}}\] because the electrons would be closer to the nucleus. Yet \[1{{s}^{7}}\] is not observed. It violates
A)
Heisenberg's uncertainty principle
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B)
Hund's rule
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C)
Pauli exclusion principle
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D)
Bohr postulate of stationary orbits
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View Answer play_arrow
For orthorhombic system axial ratios are\[a\ne b\ne c\] and the axial angles are
A)
\[\alpha =\beta =\gamma \ne 90{}^\circ \]
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B)
\[\alpha =\beta =\gamma =90{}^\circ \]
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C)
\[\alpha =\gamma =90{}^\circ ,\]\[\beta \ne 90{}^\circ \]
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D)
\[\alpha \ne \beta \ne \gamma =90{}^\circ \]
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View Answer play_arrow
When cyclohexane is poured on water, it floats, because
A)
cyclohexane is in ?boat? form.
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B)
cyclohexane is in ?chair? form.
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C)
cyclohexane is in ?crown? form.
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D)
cyclohexane is less dense than water.
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View Answer play_arrow
\[(n-1){{d}^{10}}n{{s}^{2}}\] is the general electronic configuration of
A)
Fe, Co, Ni
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B)
Cu, Ag, Au
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C)
Zn, Cd, Hg
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D)
Se, Y, La
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View Answer play_arrow
Which is colourless in water?
A)
\[T{{i}^{3+}}\]
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B)
\[{{V}^{3+}}\]
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C)
\[C{{u}^{3+}}\]
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D)
\[S{{c}^{3+}}\]
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View Answer play_arrow
Structurally biodegrdable detergent should contain
A)
normal alkyi chain.
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B)
branched alkyi chain.
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C)
phenyl side chain.
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D)
cyclohexyl side chain.
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View Answer play_arrow
Which of the following crystals does not exhibit Frenkel defect?
A)
AgBr
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B)
AgCl
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C)
KBr
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D)
ZnS
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View Answer play_arrow
A reaction which is of first order w.r.t. reactant A, has a rate constant \[6\,{{\min }^{-1}}.\] If we start with \[[A]=0.5\,mol\,{{L}^{-1}},\]when would \[[A]\] reach the value of \[0.5\,mol\,{{L}^{-1}}\]
A)
0.384 min
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B)
0.15 min
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C)
3 min
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D)
3.84 min
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View Answer play_arrow
Which pair of elements belongs to same group?
A)
Elements with atomic no.17and 38
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B)
Elements with atomic no. 20 and 40
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C)
Elements with atomic no. 17 and 53
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D)
Elements with atomic no. 11 and 33
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View Answer play_arrow
Which of the following statements about low density polythene is FALSE?
A)
Its synthesis requires dioxygen or a peroxide initiator as a catalyst.
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B)
It is used in the manufacture of buckets, dust-bins etc.
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C)
Its synthesis requires high pressure.
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D)
It is a poor conductor of electricity.
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View Answer play_arrow
Which plays an important role in the dispersal of spores in Funarial
A)
Operculum
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B)
Capsule
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C)
Peristome and annulus
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D)
Sporogonium
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View Answer play_arrow
Read the following five statements (i - v) and answer the question.
(i) In Equisetum, the female gametophyte is retained on the parent sporophyte. (ii) In Ginkgo, male gametophyte is not independent. (iii) The sporophyte in Riccia is more developed than that in Polytrichum. (iv) Sexual reproduction in Volvox is isogamous. (v) The spores of slime molds lack cell walls. How many of the above statements are correct?
A)
Two
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B)
Three
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C)
Four
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D)
One
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View Answer play_arrow
The fluidity of membranes in a plant in cold weather may be maintained by
A)
increasing the number of phospholipids with unsaturated hydrocarbon tails
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B)
increasing the proportion of integral proteins
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C)
increasing concentration of cholesterol in membrane
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D)
increasing the number of phospholipids with saturated hydrocarbon tail
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View Answer play_arrow
Addition of a solute to pure water causes
A)
negative water potential.
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B)
more negative water potential.
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C)
positive water potential.
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D)
more positive water potential.
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View Answer play_arrow
Which one of the following process help the water- soluble inorganic nutrients go down into the soil horizon and get precipitated as unavailable salts?
A)
Fragmentation
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B)
Leaching
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C)
Catabolism
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D)
Humification
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View Answer play_arrow
Siliceous frustules of diatoms being indestructible, piled up at the bottom of ocean and formed a thick bed over billions of years. Such a thick bed is known as
A)
red sea
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B)
diatomaceous earth
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C)
pseudorocks
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D)
red tides
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View Answer play_arrow
The first dicarboxylic acid in Krebs' cycle is
A)
isocitric acid
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B)
pyruvic acid
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C)
oxalo acetic acid
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D)
\[\alpha \]-ketoglutaric acid
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View Answer play_arrow
\[{{N}_{2}}+8{{e}^{-}}+8{{H}^{+}}+16\,ATP\to \]\[2N{{H}_{4}}+{{H}_{2}}+16ADP+16Pi\] The above equation refers to
A)
ammonification
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B)
nitrification
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C)
nitrogen fixation
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D)
denitrification
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View Answer play_arrow
A pressure that is responsible for pushing up water to small height in the stem is called
A)
positive root pressure
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B)
turgor pressure
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C)
pressure gradient
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D)
negative root pressure
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View Answer play_arrow
A cell cannot divide if it does not cross
A)
Hayflick limit
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B)
cytokinesis
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C)
restriction point
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D)
\[{{G}_{0}}\] - phase
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View Answer play_arrow
A vascular bundle in which the protoxylem is pointing to the periphery is called
A)
endarch
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B)
exarch
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C)
radial
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D)
closed
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View Answer play_arrow
Which one of the following micro-organisms is used for production of citric acid in industries?
A)
Penicillium citrinum
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B)
Aspergillus niger
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C)
Rhizopus nigricans
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D)
Lactobacillus bulgaris
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View Answer play_arrow
Emasculation is not required when flowers are
A)
bisexual
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B)
intersexual
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C)
unisexual
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D)
either [a] or [b]
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View Answer play_arrow
Which of the following pairs is not correctly matched?
A)
Anabaena - Cyanobacteria
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B)
Amoeba - Protozoa
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C)
Gonyaulax - Dinoflagellates
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D)
Albugo - Chrysophytes
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View Answer play_arrow
Which part of the coconut produces coir?
A)
Seed coat
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B)
Mesocarp
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C)
Epicarp
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D)
Pericarp
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View Answer play_arrow
The given diagram shows microsporangium of a mature anther. Identify A, B and C.
A)
A-Middle layer, B-Endothecium, C-Tapetum
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B)
A-Endothecium, B-Tapetum, C-Middle layer
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C)
A-Endothecium, B-Middle layer, C-Tapetum
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D)
A-Tapetum, B-Middle layer, C-Endothecium
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The productivity of a crop declines when leaves begin to wilt mainly because
A)
the chlorophyll of wilting leaves decomposes.
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B)
flaccid mesophyll cells are incapable of photosynthesis.
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C)
stomata close, preventing \[C{{O}_{2}}\] from entering the leaf.
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D)
photolysis, the water-splitting step of photosynthesis, cannot occur when there is a water deficiency.
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View Answer play_arrow
Which one of the following is not a function of an ecosystem?
A)
Energy flow
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B)
Decomposition
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C)
Productivity
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D)
Stratification
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View Answer play_arrow
The process in which mature differentiated cells reverse to meristematic activity to form callus is called
A)
dedifferentiation
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B)
differentiation
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C)
redifferentiation
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D)
None of the above
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View Answer play_arrow
Which one of the following statement is true?
A)
The greater the Biological Oxygen Demand (BOD) of waste water, more is its polluting potential.
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B)
The greater the BOD of waste water, less is its polluting potential.
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C)
The lesser the BOD of waste water, more is its polluting potential.
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D)
The lesser the BOD of waste water, less is its polluting potential.
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View Answer play_arrow
Most of the net primary productivity in an ecosystem is used for what purpose?
A)
respiration by primary consumers
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B)
respiration by secondary consumers
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C)
growth by primary consumers
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D)
growth by secondary consumers
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View Answer play_arrow
Endemic plants and animals are those which are
A)
cosmopolitan in distribution.
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B)
restricted to certain area.
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C)
found in arctic region.
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D)
gregarious in habit.
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View Answer play_arrow
Micro-propagation is
A)
propagation of microbes in vitro
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B)
propagation of plants in vitro
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C)
propagation of cells in vitro
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D)
growing plants on smaller scale
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View Answer play_arrow
Final electron acceptor in oxidative phosphorylation is
A)
hydrogen
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B)
dehydrogenase
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C)
cytochrome
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D)
oxygen
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View Answer play_arrow
In a CAM plant, the concentration of organic acid
A)
increases during the day.
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B)
decreases during the day.
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C)
increases during night.
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D)
decreases or increases during day.
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View Answer play_arrow
The phenomenon ofplasmolysis is evident when cells are kept in
A)
hypotonic solution
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B)
hypertonic solution
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C)
isotonic solution
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D)
None of the above
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View Answer play_arrow
Quantasomes are found in
A)
mitochondria
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B)
ehloroplast
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C)
lysosome
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D)
endoplasmic reticulum
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View Answer play_arrow
Identify the parts labelled as A, B, C and D in the given figure and select the correct option from the codes given below.
A)
A - Seed coat B - Scutellum C - Epicotyl D - Hypocotyl
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B)
A - Seed coat B - Scutellum C - Hypocotyl D - Epicotyl
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C)
A - Seed coat B - Cotyledon C - Endosperm D - Hypocotyl
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D)
A - Seed coat B - Endosperm C - Cotyledon D - Hypocotyl
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View Answer play_arrow
Which one of the following is a correct statement?
A)
Pteridophyte gametophyte has a protonemal and leafy stage
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B)
In gymnosperms, female gametophyte is free-living
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C)
Antheridiophores and archegoniophores are present in pteridophytes
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D)
Origin of seed habit can be traced in pteridophytes
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View Answer play_arrow
Function of suspensor of embryo is
A)
absorption of nourishment.
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B)
push the embryo into nutritive endosperm region.
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C)
formation of secondary embryos.
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D)
all of the above
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View Answer play_arrow
Pineapple (ananas) fruit develops from
A)
a multipistillate syncarpous flower
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B)
a cluster of compactly borne flowers on a common axis
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C)
a multilocular monocarpellary flower
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D)
a unilocular polycarpellary flower
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View Answer play_arrow
In a raceme, the flowers are-
A)
Arranged in a basipetal succession
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B)
Arranged in acropetal succession
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C)
Separate sexes
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D)
Of the same sex
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View Answer play_arrow
The common bottle cork is a product of
A)
Dermatogen
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B)
Phellogen
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C)
Xyiem
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D)
Vascular cambium
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View Answer play_arrow
Telomere and eukaryotic chromosome possesses short segments of
A)
guanine rich repeats.
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B)
thymine rich repeats.
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C)
cytosine rich repeats.
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D)
adenine rich repeats.
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View Answer play_arrow
What mechanism explains the movement of sucrose from source to sink?
A)
Evaporation of water and active transport of sucrose from sink.
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B)
Osmotic movement of water into the sucrose loaded sieve tube cells creating a higher hydrostatic pressure into the source than in the sink.
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C)
Tension created by differences in hydrostatic pressure in the source and sink.
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D)
Active transport of sucrose through the sieve tube membranes driven by proton pump.
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View Answer play_arrow
Which one of the following pairs is not correctly matched:
A)
Manas Sanctuary - Assam
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B)
Kanha National park - Madhya Pradesh
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C)
Dachigam Sanctuary - West Bengal
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D)
Bandipur Sanctuary - Karnataka
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View Answer play_arrow
A taxon facing an extremely high risk of extinction in wild in the immediate future is called
A)
critical endangered
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B)
endangered
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C)
vulnerable
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D)
extinct in wild
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View Answer play_arrow
Compensation point is
A)
where there is neither photosynthesis nor respiration.
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B)
when rate of photosynthesis is equal to the rate of respiration.
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C)
when entire food synthesized into photosynthesis remain utilized.
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D)
when there is enough water just to meet the requirements of plant.
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View Answer play_arrow
Which of the following hormones does not naturally occur in plants?
A)
2, 4-D (2, 4-dichloropheoxy acetic acid)
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B)
IAA
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C)
ABA
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D)
GA
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View Answer play_arrow
Hydroponics or soilless culture helps is knowing
A)
essentiality of an element
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B)
deficiency symptoms caused by an element
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C)
toxicity caused by an element
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D)
all of these
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View Answer play_arrow
A trace element essential for plant growth and radioisotope, which is used in cancer therapy is
A)
cobalt
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B)
calcium
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C)
sodium
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D)
iron
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View Answer play_arrow
Choose odd w.r.t. collenchyma.
A)
Found in hypodermis of dicot stem
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B)
Living mechanical tissue
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C)
Absent in monocots
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D)
Thickening of wall is due to deposition of cellulose and lignin
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Water will be absorbed by root hairs when
A)
concentration of salt in the soil is high.
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B)
concentration of solutes in the cell sap is high.
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C)
plant is rapidly respiring.
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D)
they are separated from soil by a permeable membrane.
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View Answer play_arrow
Which of the following types of phytohormones resemble the nucleic acids in some structural aspects?
A)
Auxin
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B)
Cytokinin
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C)
Gibberellin
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D)
ABA
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View Answer play_arrow
Which of the following statement(s) is/are incorrect?
(i) Proton channel of oxysome / complex V / ATP synthase is located in \[{{F}_{1}}.\] (ii) Metabolic water is produced in terminal oxidation / produced in respiration. (iii) CoQ accepts electron from NADH dehydrogenase (complex I) and also can accept electron from \[FAD{{H}_{2}}/\] succinate Q-reductase / complex II. (iv) Cytochrome c is a small protein attached to outer surface of the inner mitochondrial membrane and acts as mobile carrier for transfer of electrons between complex I (Cyt be, complex) and III. (v) Complex IV refers to cytochrome c oxidase (cyt a, \[{{a}_{3}}\] and 2 Cu per centre). (vi) If a cell is treated with a drug that inhibits ATP synthase, the pH of mitochondrial matrix will increase.
A)
(i), (ii) and (iii)
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B)
(iii), (v) and (vi)
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C)
(i) and (iv)
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D)
Only (iii)
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View Answer play_arrow
Which one of following feature is possessed by Crustaceans and not by insects?
A)
Paired limbs
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B)
Two pairs of antenna
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C)
Chitinous exoskeleton
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D)
Bilateral symmetry
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View Answer play_arrow
Which one is not a vestigial organ?
A)
Wings of kiwi
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B)
Coccyx in man
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C)
Pelvic girdle of python
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D)
Flipper of seal
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View Answer play_arrow
During inspiration, the diaphragm
A)
relaxes to become dome-shaped
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B)
contracts and flattens
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C)
expands
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D)
shows no change
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View Answer play_arrow
Cirrhosis of liver is caused by the chronic intake of
A)
Opium
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B)
Alcohol
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C)
Tobacco (Chewing)
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D)
Cocaine
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View Answer play_arrow
Which of the following sets contains polysaccharides?
A)
Glucose, fructose, lactose
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B)
Starch, glycogen, cellulose
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C)
Sucrose, maltose, cellulose
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D)
Galactose, starch, sucrose
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View Answer play_arrow
Which one of the following combinations of organisms are responsible for the formation and flavour of yoghurt?
A)
Lactobacillus bulgaricus and Streptococcus thermophiles
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B)
Rhizobium meliloti and Azotobacter
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C)
Bacillus subtilis and Escherichia coli
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D)
Bacillus megathermus and Xanthomonas species
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View Answer play_arrow
Baculoviruses are excellent candidates for
A)
species-specific narrow spectrum pesticidal applications.
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B)
species-specific broad spectrum pesticidal applications.
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C)
species-specific narrow spectrum insecticidal applications.
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D)
species-specific broad spectrum insecticidal applications.
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View Answer play_arrow
Select the correct statement.
A)
Genetic engineering works only on animals and has not yet been successfully used on plants.
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B)
There are no risks associated with DNA technology.
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C)
The first step in PCR is heat which is used to separate both the strands of target DNA.
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D)
DNA from one organism will not bond to DNA from another animal.
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View Answer play_arrow
Study the age pyramids given below and select the correct statements regarding these.
A)
A is a triangle shaped age pyramid, where pre-reproductive stage is very large as compared to the reproductive and post reproductive stages of the population. This type of age structure indicates that the population would increase rapidly.
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B)
B is an inverted bell shaped age pyramid, where number of pre-reproductive and reproductive individuals is almost equal. This type of age structure indicates that the population is stable.
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C)
C is an urn shaped age pyramid, where more number of older people are present. This type of age structure indicates that the population is declining.
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D)
All of these
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View Answer play_arrow
The lactic acid generated during muscle contraction is converted to glycogen in
A)
Muscle
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B)
Kidney
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C)
Pancreas
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D)
Liver
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View Answer play_arrow
Thromboplastin is secreted by
A)
platelets
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B)
lymphocytes
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C)
helper T-cells
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D)
mast cells
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View Answer play_arrow
B-DNA which is right-handed double helix contains ______ base pairs per turn of the helix and each turns is ______ long.
A)
\[10,\]\[3.4\,\overset{{}^\circ }{\mathop{A}}\,\]
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B)
\[10,\]\[34\,\overset{{}^\circ }{\mathop{A}}\,\]
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C)
\[11,\]\[20\,\overset{{}^\circ }{\mathop{A}}\,\]
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D)
\[11,\]\[34\,\overset{{}^\circ }{\mathop{A}}\,\]
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View Answer play_arrow
Match Column-1 with Column-11 and select the correct option from the codes given below.
Column-I Column-II A. Van Kupffer cell (i) Islets of Langerhans B. \[\beta \]-cells (ii) Liver sinusoids C. Oxyntic cells (iii) Thyroid gland D. Paneth cells (iv) Stomach (v) Small intestine
A)
A\[\to \](i); B\[\to \](v); C\[\to \](iii); D\[\to \](iv)
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B)
A\[\to \](iii); B\[\to \](iv); C\[\to \](ii); D\[\to \](v)
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C)
A\[\to \](iv); B\[\to \](ii); C\[\to \](i); D\[\to \](iii)
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D)
A\[\to \](ii); B\[\to \](i); C\[\to \](iv); D\[\to \](v)
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View Answer play_arrow
Splitting of centromere and hence separation of chromatids occur during
A)
anaphase of mitosis
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B)
anaphase of meiosis-I
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C)
anaphase of meiosis-II
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D)
both [a] and [c]
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View Answer play_arrow
Which one of the following combination is mismatched?
A)
Glycocalyx - may be capsule or slime layer
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B)
Pili - Reproduction
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C)
Cell wall - Protective, determines shape, prevents from bursting
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D)
Flagella, Pili and Fimbriae - Surface structures of bacterial cell
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View Answer play_arrow
The most basic amino acid is
A)
Arginine
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B)
Histidine
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C)
Glycine
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D)
Glutamine
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View Answer play_arrow
Poison glands of snake are modified
A)
Linguals
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B)
Sublinguals
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C)
Maxillaries
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D)
Parotids
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View Answer play_arrow
Which of the following statements are wrong?
(i) Leucocytes disintegrate in the spleen and liver. (ii) RBC, WBC and blood platelets are produced by bone marrow. (iii) Neutrophils bring about destruction and detoxification of toxins of protein origin. (iv) The important function of lymphocytes is to produce antibodies.
A)
(i) and (ii) only
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B)
(i) and (iv) only
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C)
(i) and (iii) only
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D)
(ii) and (iii) only
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View Answer play_arrow
Which one single organism or the pair of organisms is correctly assigned to its taxonomic group?
A)
Paramecium and Plasmodium belong to the same kingdom as that of Penicillium
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B)
Lichen is a composite organism formed from the symbiotic association of an algae and a protozoan
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C)
Yeast used in making bread and beer is a fungus
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D)
Nostoc and Anabaena are examples of Protista
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View Answer play_arrow
Bee dances are meant for
A)
Courtship
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B)
Communication
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C)
Recreation
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D)
Instinct
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View Answer play_arrow
Which of the following are correct?
A)
Sponges: Cellular level of organization
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B)
Cnidaria: Tissue level of organization
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C)
Platyhelminthes: Organ level of organization
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D)
Annelids, Arthropods, Molluscs, Echinoderms and Chordates: Organ system level of organization.
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View Answer play_arrow
Which one of the following techniques is safest for the detection of cancers?
A)
Magnetic resonance imaging (MRI)
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B)
Radiography (X-ray)
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C)
Computed tomography (CT)
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D)
Histopathological studies
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View Answer play_arrow
Select the correct option showing the life cycle of Plasmodium.
A)
Sporozoites (human)\[\to \]RBCs\[\to \]liver cells \[\to \]gametocytes in blood\[\to \]blood meal, bite (female mosquito)\[\to \]multiply (mosquito)\[\to \]sporozoites (mosquito)
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B)
Sporozoites (human)\[\to \]liver cells\[\to \]RBCs\[\to \] gametocytes in blood\[\to \]blood meal, bite (female mosquito)\[\to \]multiply (mosquito)\[\to \]sporozoites (mosquito)
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C)
Gametocytes (mosquito)\[\to \]bite\[\to \] gametocytes (human)\[\to \]RBCs\[\to \]multiply\[\to \] sporozoites blood meal (human)\[\to \]bite \[\to \]sporozoites (female mosquito)\[\to \]multiply (mosquito)\[\to \]gametocytes (mosquito)
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D)
Sporozoites (human)\[\to \]liver cells\[\to \] gametocytes in blood\[\to \]blood meal, bite(female mosquito)\[\to \]multiply (mosquito)\[\to \]sporozoites (mosquito)
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View Answer play_arrow
Which of the following technique is used for the separation of DNA fragments?
A)
Gel electrophoresis
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B)
Chromatography
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C)
Transformation
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D)
Transduction
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View Answer play_arrow
The flow chart given below represents the process of recombinant DNA technology. Identify A, B,C and D.
A)
A-Restriction endonuclease, B-Restriction exonuclease, C- DNA ligase, D- Transformation
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B)
A-Restriction endonuclease, B-Restriction endonuclease, C-DNA ligase, D-Transformation
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C)
A-Restriction endonuclease, B-Restriction endonuclease, C-Hydrolase, D-Transformation
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D)
A-Restriction endonuclease, B-Restriction endonuclease, C-Hydrolase, D-Transduction
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View Answer play_arrow
Which one of the following statement is correct?
A)
Warm and moist environment favour decomposition whereas low temperature and anaerobiosis inhibit decomposition
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B)
Warm and moist environment inhibit decomposition whereas low temperature and anaerobiosis favour decomposition
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C)
Warm and anaerobiosis favour decomposition whereas low temperature favours decomposition
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D)
Warm and low temperature inhibit decomposition whereas anaerobiosis favours decomposition
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View Answer play_arrow
Which of the following statement(s) is/are true?
(i) Biowar is the use of biological weapons against humans and /or their crops and animals. (ii) Bioethics is the unauthorized use of bioresources and traditional knowledge related to bioresources for commercial benefits. (iii) Biopatent is exploitation of bioresources of other nations without proper authorisation.
A)
(ii) only
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B)
(i) only
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C)
(i) and (ii) only
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D)
(i) and (iii) only
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View Answer play_arrow
The species that invade a bare area are called
A)
keystone species
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B)
extinct species
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C)
pioneer species
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D)
rare species
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View Answer play_arrow
If receptor molecule is removed from target organ for hormone action, the target organ will
A)
continue to respond but require higher concentration of hormone
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B)
continue to respond but in opposite away
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C)
continue to respond without any difference
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D)
not respond to hormone
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View Answer play_arrow
Osteoporosis is caused by
A)
\[C{{a}^{2+}}\] deficiency
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B)
Hypersecretion of calcitonin
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C)
\[{{K}^{+}}\] deficiency
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D)
Hypersecretion of Parathormone
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View Answer play_arrow
Which hormone is related to mineral metabolism but is not a peptide / protein in nature?
A)
Parathyroid hormone (PTH)
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B)
Atrial natriuretic (ANF)
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C)
Aldosterone
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D)
All of these
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View Answer play_arrow
Mark the incorrect statement
A)
The ear ossicle attached to tympanic membrane is malleus
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B)
Opsin (of Rhodopsin) develops from vitamin A
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C)
The pressure on ear drum is equalized by eustachian tube
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D)
Otolith organ consists of saccule and utricle
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View Answer play_arrow
The contractile protein of skeletal muscle involving ATPase activity is
A)
Myosin
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B)
Actin
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C)
Troponin
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D)
Tropomyosin
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View Answer play_arrow
Endocrine glands have ____ to carry their secretions to the specific organ.
A)
capillaries
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B)
tubules
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C)
no ducts
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D)
ducts
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View Answer play_arrow
The functional unit of mammalian kidney is
A)
ureter
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B)
urinary bladder
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C)
urethra
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D)
nephron
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View Answer play_arrow
The condition of excess urea in blood is known as
A)
Polyuria
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B)
Haematuria
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C)
Uraemia
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D)
Diuresis
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View Answer play_arrow
Chordae tendinae are found in
A)
joints of legs
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B)
atria of heart
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C)
ventricles of brain
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D)
ventricles of heart
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View Answer play_arrow
The pattern of contraction and relaxation of the heart is referred to as
A)
blood pressure
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B)
arterial flow
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C)
blood flow
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D)
cardiac cycle
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View Answer play_arrow
Chemosensitive area of respiratory centre in medulla is affected is
A)
less \[C{{O}_{2}}\] and \[{{H}^{+}}\] ions
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B)
less \[{{O}_{2}}\] and \[{{H}^{+}}\] ions
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C)
excess \[C{{O}_{2}}\] and \[{{H}^{+}}\] ions
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D)
excess \[{{O}_{2}}\] and \[{{H}^{+}}\] ions
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View Answer play_arrow
Which of the following statements are true?
(i) The blood transports \[C{{O}_{2}}\] comparatively easily because of its higher solubility. (ii) Approximately 8-9% of \[C{{O}_{2}}\] is transported being dissolved in the plasma of blood. (iii) The carbon dioxide produced by the tissues, diffuses passively into the blood stream and passes into red blood corpuscles and react with water to form \[{{H}_{2}}C{{O}_{3}}.\] (iv) The oxyhaemoglobin \[(Hb{{O}_{2}})\] of the erythrocytes is basic. (v) The chloride ions' diffuse from plasma into the erythrocytes to maintain ionic balance.
A)
(i), (iii) and (v) are true, (ii) and (iv) are false
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B)
(i), (iii) and (v) are false, (ii) and (iv) are true
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C)
(i), (ii) and (iv) are true, (iii) and (v) are false
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D)
(i), (ii) and (iv) are false, (iii) and (v) are true
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View Answer play_arrow
In a mRNA molecule, untranslated regions (UTRs) are present at
A)
5' - end (before start codon)
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B)
3' - end (after stop codon)
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C)
both [a] and [b]
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D)
no UTRs present in Mrna
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View Answer play_arrow
What is the figure given below showing in particular?
A)
Ovarian cancer
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B)
Uterine cancer
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C)
Tubectomy
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D)
Vasectomy
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View Answer play_arrow
Identify the human developmental stage shown below as well as the related right place of its occurrence in a normal pregnant woman, and select the right option for the two together.
A)
Develeopmental stage - Late morula Site of occurrence - Middle part of fallopian
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B)
Develeopmental stage - Blastula Site of occurrence - End part of fallopian tube
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C)
Develeopmental stage - Blastocyst Site of occurrence - Uterine wall
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D)
Develeopmental stage - 8 celled morula Site of occurrence - Starting point of fallopian tube
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View Answer play_arrow
Which one of the following statements is correct with respect to immunity?
A)
Preformed antibodies need to be injected to treat the bite by a viper snake.
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B)
The antibodies against small pox pathogen are produced by T - lymphocytes.
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C)
Antibodies are protein molecules, each of which has four light chains.
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D)
Rejection of a kidney graft is the function of B-lymphocytes.
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View Answer play_arrow
A)
dominant X-linked
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B)
recessive X-linked
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C)
dominant Y-linked
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D)
recessive Y-linked
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View Answer play_arrow