question_answer 1) A rectangular coil of 100 turns and size \[0.1\times 0.05\] m is placed perpendicular to a magnetic field of 0.1 T. The induced emf when the field drops to 0.05 T in 0.05 s is
A)
0.5V
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B)
1. 0V
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C)
1.5V
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D)
2.0V
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question_answer 2) A paramagnetic substance is placed in a weak magnetic field and its absolute temperature T is increased. As a result, its magnetisation
A)
increases in proportion to T
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B)
decreases in proportion to \[\frac{1}{T}\]
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C)
increases in proportion to \[{{T}^{2}}\]
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D)
decreases in proportion to \[\frac{1}{{{T}^{2}}}\]
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question_answer 3) The current through a bulb is increased by 1%. Assuming that the resistance of the filament- remains unchanged the power of the bulb will
A)
increase by 1%
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B)
decrease by 1%
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C)
increase by 2%
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D)
decrease by 2%
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question_answer 4) You are given two resistances \[{{R}_{1}}\] and \[{{R}_{2}}\]. By using them singly, in series and in parallel, you can obtain four resistances of \[1.5\,\Omega ,\,\,2\,\,\Omega ,\,\,6\,\,\Omega \]. and \[8\,\Omega \]. The values of \[{{R}_{1}}\] and \[{{R}_{2}}\] are
A)
\[1\,\,\Omega ,\,\,7\,\,\Omega \]
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B)
\[1.5\,\,\Omega ,\,\,6.5\,\,\Omega \]
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C)
\[3\,\,\Omega ,\,\,5\,\,\Omega \]
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D)
\[2\,\,\Omega ,\,\,6\,\,\Omega \]
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question_answer 5) A wire of length I carrying a current I A is bent into a circle. The magnitude of the magnetic moment is
A)
\[\frac{l{{I}^{2}}}{2\pi }\]
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B)
\[\frac{l{{I}^{2}}}{4\pi }\]
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C)
\[\frac{{{l}^{2}}I}{2\pi }\]
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D)
\[\frac{{{l}^{2}}I}{4\pi }\]
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question_answer 6) A parallel beam of white light is reflected from a thin wedge-shaped film. The colour of the fringe at the edge of the wedge will be
A)
white
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B)
red
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C)
black
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D)
violet
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question_answer 7) An object is placed at the focus of a convex mirror. If its focal length is 20 cm, the distance of mirror is
A)
10 cm
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B)
20 cm
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C)
40 cm
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D)
None of these
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question_answer 8) A convex lens of glass \[(\mu =1.5)\] has a focal length of 8 cm when placed in air. What is the focal length of lens when it is immersed in water \[\left( \mu =\frac{4}{3} \right)\]?
A)
4 cm
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B)
8 cm
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C)
16cm
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D)
32cm
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question_answer 9) An LCR series circuit, connected to a source E, is at resonance. Then
A)
the voltage across R is zero
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B)
the voltage across R equals applied voltage
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C)
the voltage across C is zero
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D)
the voltage across L equals applied voltage
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question_answer 10) What will be the colour of the sky as seen from the earth if there were no atmosphere?
A)
Black
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B)
Blue
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C)
Orange
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D)
Red
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question_answer 11) In a single slit diffraction experiment, the width of the slit is made double its original width. Then the central maximum on the diffraction pattern will become
A)
narrower and fainter
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B)
narrower and brighter
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C)
broader and fainter
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D)
broader and brighter
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question_answer 12) An \[\alpha \]-particle and a deuteron projected with equal kinetic energies describe circular paths of radii \[{{r}_{1}}\] and \[{{r}_{2}}\] respectively in a uniform magnetic field. The ratio \[{{r}_{1}}/{{r}_{2}}\] is
A)
1
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B)
2
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C)
\[\frac{1}{\sqrt{2}}\]
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D)
\[\sqrt{2}\]
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question_answer 13) The energy in monochromatic X-rays of wavelength \[1\overset{\text{o}}{\mathop{\text{A}}}\,\] is roughly equal to
A)
\[2\times {{10}^{-15}}J\]
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B)
\[2\times {{10}^{-16}}J\]
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C)
\[2\times {{10}^{-17}}J\]
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D)
\[2\times {{10}^{-18}}J\]
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question_answer 14) The de-Broglie wavelength of a neutron at \[{{927}^{o}}C\] is \[\lambda \]. What will be its wavelength at\[{{27}^{o}}C\]?
A)
\[\frac{\lambda }{2}\]
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B)
\[\lambda \]
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C)
\[2\lambda \]
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D)
\[4\lambda \]
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question_answer 15) A telescope has an objective of focal length 100 cm and an eye-piece of focal length 5 cm. What is the magnifying power of the telescope when it is in normal adjustment?
A)
0.2
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B)
2.0
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C)
20
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D)
200
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question_answer 16) An isotropic source of 2 candela produces a light flux equal to
A)
\[2\pi \] lumen
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B)
\[4\pi \] lumen
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C)
\[6\pi \] lumen
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D)
\[8\pi \] lumen
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question_answer 17) No photoelectrons are emitted from a metal if the wavelength of the light exceeds 600 nm. The work function of the metal is approximately equal to
A)
\[3\times {{10}^{-16}}J\]
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B)
\[3\times {{10}^{-19}}J\]
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C)
\[3\times {{10}^{-20}}J\]
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D)
\[3\times {{10}^{-22}}J\]
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question_answer 18) In Rutherfords a-particle experiment with thin gold foil, 8100 scintillations per minute are observed at an angle of \[{{60}^{o}}\]. The number of scintillations per minute at an angle of \[{{120}^{o}}\] will be
A)
900
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B)
2025
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C)
32400
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D)
4050
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question_answer 19)
Which of the following gates has the truth table? A B C 0 0 1 1 0 1 0 1 1 1 1 0
A)
NAND
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B)
NOR
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C)
XOR
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D)
AND
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question_answer 20) Which of the junction diodes shown below are forward biased?
A)
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B)
done
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C)
done
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D)
done
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question_answer 21) A uniform rod of mass m and length I is held inclined at an angle of \[{{60}^{o}}\] with the vertical. What will be the potential energy of the rod in this position?
A)
Zero
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B)
\[\frac{mgl}{4}\]
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C)
\[\frac{mgl}{2}\]
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D)
\[mgl\]
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question_answer 22) A sphere rolls down an inclined plane without slipping. What fraction of its total energy is rotational?
A)
\[\frac{2}{7}\]
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B)
\[\frac{3}{7}\]
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C)
\[\frac{4}{7}\]
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D)
\[\frac{5}{7}\]
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question_answer 23) From the top of a building 40 m tall, a boy projects a stone vertically upwards with an initial velocity 10 \[m{{s}^{-1}}\] such that it eventually falls to the ground. After how long will the stone strike the ground? Take \[g=10\,\,m{{s}^{-2}}\]
A)
1 s
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B)
2 s
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C)
3 s
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D)
4 s
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question_answer 24) A 150 m long train is travelling from east to west at a speed of 20 \[m{{s}^{-1}}\]. A bird is flying from west to east at a speed of 5 \[m{{s}^{-1}}\]. How long will the bird take to cross the train?
A)
6s
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B)
7.5 s
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C)
10 s
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D)
30 s
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question_answer 25) An elastic spring has a length \[{{l}_{1}}\] when it is stretched with a force of 2 N and a length of \[{{l}_{2}}\]when it is stretched with a force of 3N. What will be the length of the spring if it is stretched with force of 5N?
A)
\[({{l}_{1}}+{{l}_{2}})\]
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B)
\[\frac{1}{2}({{l}_{1}}+{{l}_{2}})\]
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C)
\[(3{{l}_{2}}-2{{l}_{1}})\]
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D)
\[(3{{l}_{1}}-2{{l}_{2}})\]
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question_answer 26) The density of water at the surface of ocean is\[\rho \]. If the bulk modulus of water is B, what is the density of ocean water at a depth where the pressure is \[n{{\rho }_{0}}\], where \[{{p}_{0}}\] is the atmospheric pressure?
A)
\[\frac{\rho B}{B-(n-1){{p}_{0}}}\]
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B)
\[\frac{\rho B}{B+(n-1){{p}_{0}}}\]
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C)
\[\frac{\rho B}{B-n{{p}_{0}}}\]
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D)
\[\frac{\rho B}{B+n{{p}_{0}}}\]
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question_answer 27) What is the torque of force \[\vec{F}=3\,\hat{i}+\hat{j}+5\hat{k}\]acting at point whose position vector is\[\vec{r}=7\,\hat{i}+3\hat{j}+\hat{k}\]?
A)
\[14\,\hat{i}-38\hat{j}+16\,\hat{k}\]
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B)
\[4\,\hat{i}+4\hat{j}+6\,\hat{k}\]
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C)
\[14\,\hat{i}+38\hat{j}-16\,\hat{k}\]
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D)
\[-21\,\hat{i}+3\hat{j}+5\,\hat{k}\]
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question_answer 28) Two satellites of masses 3M and M orbit the earth in circular orbits of radii rand3r respectively. The ratio of their speeds is
A)
1 : 1
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B)
\[\sqrt{3}\,:1\]
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C)
3 : 1
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D)
9 : 1
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question_answer 29) The dimensions of Reynoldss constant are
A)
\[[{{M}^{0}}{{L}^{0}}{{T}^{0}}]\]
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B)
\[[M{{L}^{-1}}{{T}^{-1}}]\]
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C)
\[[M{{L}^{-1}}{{T}^{-2}}]\]
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D)
\[[M{{L}^{-2}}{{T}^{-2}}]\]
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question_answer 30) The surface tension of soap solution is or. What is the work done in blowing soap bubble of radius r?
A)
\[\pi {{r}^{2}}\sigma \]
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B)
\[2\pi {{r}^{2}}\sigma \]
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C)
\[4\pi {{r}^{2}}\sigma \]
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D)
\[8\pi {{r}^{2}}\sigma \]
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question_answer 31) The ratio of rms speed of \[{{O}_{2}}\] to \[{{H}_{2}}\] is
A)
\[\frac{1}{4}\]
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B)
4
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C)
2
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D)
\[\frac{1}{2}\]
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question_answer 32)
Two rods A and B of different materials are welded together as shown in figure. If their thermal conductivities are \[{{K}_{1}}\] and \[{{K}_{2}}\] the thermal conductivity of the composite rod will be
A)
\[\frac{1}{2}\,pV\]
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B)
\[pV\]
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C)
\[2pV\]
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D)
\[4pV\]
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question_answer 33) The wavelength of the radiation emitted by a body depends upon
A)
the nature of its surface
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B)
the area of its surface
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C)
the temperature of its surface
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D)
All the above factors
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question_answer 34)
An ideal monoatomic gas is taken around the cycle ABCDA as shown in the p - V diagram. The work done during the cycle is given by
A)
\[\frac{1}{2}pV\]
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B)
\[pV\]
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C)
\[2pV\]
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D)
\[4pV\]
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question_answer 35) An ideal gas at pressure p is adiabatically compressed so that its density becomes n times the initial value The final pressure of the gas will be \[\left( \gamma =\frac{{{C}_{p}}}{{{C}_{V}}} \right)\]
A)
\[{{n}^{\gamma }}p\]
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B)
\[{{n}^{-\gamma }}p\]
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C)
\[{{n}^{(\gamma -1)}}p\]
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D)
\[{{n}^{(\gamma -1)}}p\]
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question_answer 36) The displacement of a travelling wave is given by \[y=2\,\cos \,2\pi (10t-0.008x+0.35)\] Where, \[x\]and y are in centimetre and t in second. What is the phase difference between oscillatory motion at two points separated by a distance of 4 m?
A)
\[2\,\,\pi \]
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B)
\[4\,\,\pi \]
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C)
\[6\,\,\pi \]
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D)
\[8\,\,\pi \]
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question_answer 37) A bimetallic strip consists of brass and iron when it is heated it bends into an arc with brass on the convex and iron on the concave side of the arc. This happens because
A)
brass has a higher specific heat capacity than iron
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B)
density of brass is more than that of iron
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C)
it is easier to bend an iron strip than a brass strip of the same size
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D)
brass has a higher coefficient of linear expansion than iron
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question_answer 38) Three sound waves of equal amplitudes have frequencies (v - 1), v, (v + 1). They superpose to give beats. The number of beats produced per second will be -
A)
\[v\]
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B)
\[v/2\]
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C)
2
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D)
1
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question_answer 39) Which of the following functions does not represent a stationary wave? Here a, b and c are constants.
A)
\[y=a\cos bx\sin ct\]
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B)
\[y=a\sin bx\cos ct\]
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C)
\[y=a\sin \,(bx+ct)\]
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D)
\[y=a\sin \,(bx+ct)+a\sin \,(bx-ct)\]
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question_answer 40) The velocity of sound is greatest in
A)
water
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B)
air
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C)
vacuum
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D)
steel
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question_answer 41) Due to Doppler effect, the shift in wavelength observed is 0.1, \[\overset{o}{\mathop{A}}\,\], for a star producing wavelength 6000 \[\overset{o}{\mathop{A}}\,\]. The velocity of recession of
A)
2.5 \[km{{s}^{-1}}\]
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B)
10 \[km{{s}^{-1}}\]
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C)
5 kms
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D)
20 \[km{{s}^{-1}}\]
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question_answer 42) A body executing linear simple harmonic motion has a velocity of 3 \[m{{s}^{-1}}\] when its displacement is 4 cm and a velocity of 4 \[m{{s}^{-1}}\]when its displacement is 3 cm. What is the amplitude of oscillation?
A)
5 cm
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B)
7.5 cm
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C)
10 cm
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D)
12.5 cm
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question_answer 43)
Two masses \[{{m}_{1}}\] and \[{{m}_{2}}\] are suspended together by a massless spring of force constant k, as shown in figure. When the masses are in equilibrium, mass \[{{m}_{1}}\], is removed without disturbing the system. The angular frequency of oscillation of mass \[{{m}_{2}}\] is
A)
\[\sqrt{\frac{k}{{{m}_{2}}}}\]
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B)
\[\sqrt{\frac{k}{m1}}\]
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C)
\[\sqrt{\frac{k{{m}_{1}}}{m_{2}^{2}}}\]
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D)
\[\sqrt{\frac{k{{m}_{2}}}{m_{1}^{2}}}\]
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question_answer 44) The intensity level of a sound wave is defined by an arbitrary scale. The zero of the scale is taken at the sound wave intensity
A)
\[1\times {{10}^{-10}}W{{m}^{-2}}\]
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B)
\[1\times {{10}^{-12}}W{{m}^{-2}}\]
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C)
\[1\times {{10}^{-14}}W{{m}^{-2}}\]
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D)
\[1\times {{10}^{-16}}W{{m}^{-2}}\]
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question_answer 45) A pendulum bob of mass m carrying a charge q is at rest with its string making an angle 9 with the vertical in a uniform horizontal electric field E, The tension in the string is
A)
\[\frac{mg}{\sin \theta }\] and \[\frac{qE}{\cos \theta }\]
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B)
\[\frac{mg}{\cos \theta }\] and \[\frac{qE}{\sin \theta }\]
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C)
\[\frac{qE}{mg}\]
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D)
\[\frac{mg}{qE}\]
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question_answer 46) A galvanometer of resistance \[10\,\,\Omega \]. gives full-scale deflection when 1 mA current passes through it. The resistance required to convert it into a voltmeter reading upto 2.5 V is
A)
\[24.9\,\,\Omega \]
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B)
\[249\,\,\Omega \]
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C)
\[2490\,\,\Omega \]
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D)
\[24900\,\,\Omega \]
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question_answer 47) The current inside an electrolytic cell is carried by
A)
positive ions
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B)
negative ions
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C)
both positive and negative ions
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D)
electrons
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question_answer 48) The electric potential V (in volt) varies with x (in metre) according to the relation\[V=(5+4{{x}^{2}})\]. The force experienced by a negative charge of \[2\times {{10}^{-6}}C\] located at x = 0.5 m is
A)
\[2\times {{10}^{-6}}N\]
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B)
\[4\times {{10}^{-6}}N\]
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C)
\[6\times {{10}^{-6}}N\]
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D)
\[8\times {{10}^{-6}}N\]
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question_answer 49) A parallel plate capacitor of plate area A has a charge Q. The force on each pi ate of the capacitor is
A)
\[\frac{2{{Q}^{2}}}{{{\varepsilon }_{0}}A}\]
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B)
\[\frac{{{Q}^{2}}}{{{\varepsilon }_{0}}A}\]
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C)
\[\frac{{{Q}^{2}}}{2{{\varepsilon }_{0}}A}\]
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D)
zero
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question_answer 50) In Millikans oil drop experiment, an oil drop is observed to move vertically upwards. The upward motion of the drop is due to
A)
gravity
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B)
viscosity
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C)
buoyancy
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D)
electric field
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question_answer 51) Which one of these is an important polysaccharide present in plants?
A)
Glucose
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B)
Glycogen
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C)
Sucrose
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D)
Starch
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question_answer 52) Cannizaro reaction would be given by
A)
\[{{C}_{6}}{{H}_{5}}CHO\]
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B)
\[C{{H}_{3}}COC{{H}_{3}}\]
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C)
\[C{{H}_{3}}CHO\]
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D)
\[{{C}_{2}}{{H}_{5}}CO{{C}_{2}}{{H}_{5}}\]
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question_answer 53) \[C{{H}_{3}}C\equiv CH\xrightarrow[+H{{g}^{2+}},{{60}^{o}}C]{{{H}_{2}}S{{O}_{4}}}?\]
A)
\[C{{H}_{3}}CHO\]
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B)
\[C{{H}_{3}}COOH\]
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C)
\[C{{H}_{3}}COC{{H}_{3}}\]
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D)
\[C{{H}_{3}}C{{H}_{2}}COOH\]
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question_answer 54) In which of the following can peroxide effect operate?
A)
\[C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}+HCl\]
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B)
\[C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}+HBr\]
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C)
\[C{{H}_{3}}CH=CH\,.\,C{{H}_{3}}+HBr\]
done
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D)
\[C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}+HI\]
done
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question_answer 55) The term quaternary structure is used in the context of
A)
carbohydrates
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B)
vitamins
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C)
proteins
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D)
nucleic acids
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question_answer 56) Aspirin is
A)
antibiotic
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B)
sedative
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C)
tranquilizer
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D)
antipyretic
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question_answer 57) The following is a coordination compound of iron
A)
chlorophyll
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B)
Mohrs salt
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C)
haemoglobin
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D)
vitamin \[{{B}_{12}}\]
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question_answer 58) This metal is extracted from its ore by formation of a cyanide complex
A)
Ag
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B)
Cu
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C)
Al
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D)
Zn
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question_answer 59) Smoke is an example of
A)
emulsion
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B)
aerosol
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C)
gel
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D)
foam
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question_answer 60) Propan-2-ol + ethanoic acid \[\xrightarrow{{}}\]?
A)
\[{{(C{{H}_{3}})}_{2}}CHCOOC{{H}_{3}}\]
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B)
\[{{(C{{H}_{3}})}_{2}}COOCH{{(C{{H}_{3}})}_{2}}\]
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C)
\[C{{H}_{3}}COOC{{H}_{2}}C{{H}_{3}}\]
done
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D)
\[{{(C{{H}_{3}})}_{2}}CHCOOC{{H}_{2}}C{{H}_{3}}\]
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question_answer 61) Which of the following gives RNC when treated with \[CHC{{l}_{3}}\] and KOH?
A)
\[RN{{H}_{2}}\]
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B)
\[{{R}_{2}}NH\]
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C)
\[{{R}_{4}}{{N}^{+}}C{{l}^{-}}\]
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D)
\[{{R}_{3}}N\]
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question_answer 62) Which of the following is a soap?
A)
Sodium acetate
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B)
Magnesium butyrate
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C)
Sodium palmitate
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D)
Palmitic acid
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question_answer 63) The C-C bond dissociation energy in kcal/mol is
A)
8.1
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B)
0.81
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C)
81
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D)
810
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question_answer 64) A compound has four \[s{{p}^{3}}\] hybridised covalent bonds. Its shape is
A)
linear
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B)
square planar
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C)
octahedral
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D)
tetrahedral
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question_answer 65) The resonance energy of benzene in kcal/mol is about
A)
\[\sim 20\]
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B)
\[\sim 40\]
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C)
\[\sim 60\]
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D)
\[\sim 80\]
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question_answer 66) 1 mole of \[C{{O}_{2}}\] contains
A)
\[6\times {{10}^{23}}\] atoms of C
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B)
\[6\times {{10}^{23}}\] atoms of O
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C)
\[18\times {{10}^{23}}\] molecules of \[C{{O}_{2}}\]
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D)
3 g-atoms of \[C{{O}_{2}}\]
done
clear
View Answer play_arrow
question_answer 67) Rutherfords famous experiment with \[\alpha \]-particles used this metal
A)
Ni
done
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B)
Au
done
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C)
Fe
done
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D)
Zn
done
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question_answer 68) The charge on an electron in Coulombs is
A)
\[1.602\times {{10}^{-19}}\]
done
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B)
\[1.062\times {{10}^{-19}}\]
done
clear
C)
\[1.620\times {{10}^{-19}}\]
done
clear
D)
\[1.006\times {{10}^{-19}}\]
done
clear
View Answer play_arrow
question_answer 69) The number of subshells for a shell with principal quantum number n is
A)
n
done
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B)
n + 1
done
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C)
n -1
done
clear
D)
\[2{{n}^{2}}\]
done
clear
View Answer play_arrow
question_answer 70) Which of the following pairs of atomic numbers represents s-block elements?
A)
7, 15
done
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B)
5, 12
done
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C)
9, 17
done
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D)
3, 11
done
clear
View Answer play_arrow
question_answer 71) For a system in equilibrium
A)
\[\Delta G=0\]
done
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B)
\[\Delta G>0\]
done
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C)
\[\Delta G<0\]
done
clear
D)
\[\Delta H=0\]
done
clear
View Answer play_arrow
question_answer 72) Which of the following will produce the highest rise in temperature?
A)
67 mL of 1 M NaOH + 33 mL of 0.5 M \[{{H}_{2}}S{{O}_{4}}\]
done
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B)
33 mL of 1 M NaOH + 67 mL of 0.5 M \[{{H}_{2}}S{{O}_{4}}\]
done
clear
C)
40 mL of 1 M NaOH + 60 mL of 0.5 M \[{{H}_{2}}S{{O}_{4}}\]
done
clear
D)
50 mL of 1 M NaOH + 50 mL of 0.5 M \[{{H}_{2}}S{{O}_{4}}\]
done
clear
View Answer play_arrow
question_answer 73) The standard for atomic mass is
A)
\[_{1}^{1}H\]
done
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B)
\[_{6}^{12}C\]
done
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C)
\[_{6}^{14}C\]
done
clear
D)
\[_{8}^{14}O\]
done
clear
View Answer play_arrow
question_answer 74) Which of the following involves absorption of energy?
A)
\[Cl+{{e}^{-}}\xrightarrow{{}}C{{l}^{-}}\]
done
clear
B)
\[{{O}^{-}}+{{e}^{-}}\xrightarrow{{}}{{O}^{2-}}\]
done
clear
C)
\[O+{{e}^{-}}\xrightarrow{{}}{{O}^{-}}\]
done
clear
D)
\[S+{{e}^{-}}\xrightarrow{{}}{{S}^{-}}\]
done
clear
View Answer play_arrow
question_answer 75) The successive ionisation energies of an element are 800, 2,000, 3,600, 25,000 and 32,000 kJ/mol. The number of valence electrons are
A)
5
done
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B)
2
done
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C)
3
done
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D)
4
done
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View Answer play_arrow
question_answer 76) The first order rate constant for the decomposition of \[{{N}_{2}}{{O}_{5}}\] is \[6.2\times {{10}^{-4}}{{s}^{-1}}\]. The half-life in seconds is nearly
A)
1117.7
done
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B)
111.7
done
clear
C)
223
done
clear
D)
160
done
clear
View Answer play_arrow
question_answer 77) The rate constant of a reaction is\[1.2\times {{10}^{-2}}mo{{l}^{-2}}{{L}^{2}}{{s}^{-1}}\]. The order of the reaction is
A)
0
done
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B)
1
done
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C)
2
done
clear
D)
3
done
clear
View Answer play_arrow
question_answer 78) The oxidation number of 0 in \[O{{F}_{2}}\] is
A)
-2
done
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B)
+1
done
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C)
+2
done
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D)
-1
done
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View Answer play_arrow
question_answer 79) The correct relationship is
A)
\[{{K}_{C}}=n\times {{K}_{p}}\]
done
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B)
\[{{K}_{p}}={{K}_{C}}{{(RT)}^{\Delta {{n}_{g}}}}\]
done
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C)
\[{{K}_{p}}=n\times {{K}_{C}}\]
done
clear
D)
\[{{K}_{C}}-{{K}_{p}}={{(RT)}^{\Delta N}}\]
done
clear
View Answer play_arrow
question_answer 80) For the reaction, \[2B+AC\], the equilibrium constant is
A)
\[\frac{[A]\,{{[B]}^{3}}}{[C]}\]
done
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B)
\[\frac{[C]}{[A]\,[2B]}\]
done
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C)
\[\frac{[C]}{[A]\,{{[B]}^{2}}}\]
done
clear
D)
\[\frac{[A]\,[B]}{[C]}\]
done
clear
View Answer play_arrow
question_answer 81) A buffer contains equal concentrations of \[{{X}^{-}}\]and HX. The \[{{K}_{a}}\] for HX is \[{{10}^{-8}}\]. The pH of the buffer is
A)
3
done
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B)
8
done
clear
C)
7
done
clear
D)
11
done
clear
View Answer play_arrow
question_answer 82) The metal which gives \[{{H}_{2}}\] on treatment with acid as well as NaOH is
A)
Fe
done
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B)
Cu
done
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C)
Zn
done
clear
D)
Hg
done
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View Answer play_arrow
question_answer 83) Which is isoelectronic with hydride ion?
A)
He
done
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B)
\[H{{e}^{+}}\]
done
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C)
Li
done
clear
D)
\[{{H}^{+}}\]
done
clear
View Answer play_arrow
question_answer 84) A solution of Na in liquid \[N{{H}_{3}}\] is
A)
green
done
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B)
blue
done
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C)
pink
done
clear
D)
yellow
done
clear
View Answer play_arrow
question_answer 85) The oxide which gives \[{{H}_{2}}{{O}_{2}}\] on treatment with dilute acid is
A)
\[Pb{{O}_{2}}\]
done
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B)
\[Ti{{O}_{2}}\]
done
clear
C)
\[Mn{{O}_{2}}\]
done
clear
D)
\[N{{a}_{2}}{{O}_{2}}\]
done
clear
View Answer play_arrow
question_answer 86) During the electrolysis of fused NaCI, this happens at cathode
A)
oxidation of \[N{{a}^{+}}\]
done
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B)
reduction of \[N{{a}^{+}}\]
done
clear
C)
reduction of \[C{{l}^{-}}\]
done
clear
D)
oxidation of \[C{{l}^{-}}\]
done
clear
View Answer play_arrow
question_answer 87) Which of the following is a coloured gas?
A)
\[{{N}_{2}}O\]
done
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B)
NO
done
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C)
\[{{H}_{2}}\]
done
clear
D)
\[N{{O}_{2}}\]
done
clear
View Answer play_arrow
question_answer 88) This compound gives off \[{{O}_{2}}\] on moderate heating
A)
HgO
done
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B)
ZnO
done
clear
C)
CaO
done
clear
D)
\[A{{l}_{2}}{{O}_{3}}\]
done
clear
View Answer play_arrow
question_answer 89) Plaster of Paris is hardened by
A)
liberating \[C{{O}_{2}}\]
done
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B)
hydration
done
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C)
dehydration
done
clear
D)
changing into \[CaC{{O}_{3}}\]
done
clear
View Answer play_arrow
question_answer 90) The least ionic chloride is formed by
A)
Mg
done
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B)
Ca
done
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C)
Be
done
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D)
Sr
done
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View Answer play_arrow
question_answer 91) Aluminium bronze has
A)
90% Cu
done
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B)
50% Ni
done
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C)
90% Sn
done
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D)
50% Cu
done
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View Answer play_arrow
question_answer 92) In the thermite welding, this is used
A)
Ca
done
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B)
Al + Fe
done
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C)
Fe
done
clear
D)
\[Al+F{{e}_{2}}{{O}_{3}}\]
done
clear
View Answer play_arrow
question_answer 93) \[{{K}_{2}}C{{O}_{3}}\] cannot be prepared by Solvay-ammonia process because
A)
\[{{K}_{2}}C{{O}_{3}}\] is fairly soluble in water
done
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B)
it has no water of crystallisation
done
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C)
\[KHC{{O}_{3}}\] is highly soluble in water
done
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D)
\[{{K}_{2}}C{{O}_{3}}\] decomposes in \[{{H}_{2}}O\])
done
clear
View Answer play_arrow
question_answer 94) Glaubers salt is
A)
\[N{{a}_{2}}S{{O}_{4}}\,.\,10{{H}_{2}}O\]
done
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B)
\[FeS{{O}_{4}}\,.\,7{{H}_{2}}O\]
done
clear
C)
\[ZnS{{O}_{4}}\,.\,7{{H}_{2}}O\]
done
clear
D)
\[MgS{{O}_{4}}\,.\,7{{H}_{2}}O\]
done
clear
View Answer play_arrow
question_answer 95) The salt responsible for permanent hardness of \[{{H}_{2}}O\] is
A)
\[N{{a}_{2}}S{{O}_{4}}\]
done
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B)
\[MgHC{{O}_{3}}\]
done
clear
C)
\[NaCl\]
done
clear
D)
\[MgC{{l}_{2}}\]
done
clear
View Answer play_arrow
question_answer 96) Which of the following carbonium ion is most stable?
A)
\[{{C}_{6}}{{H}_{5}}\overset{+}{\mathop{C}}\,{{H}_{2}}\]
done
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B)
\[{{(C{{H}_{3}})}_{3}}\overset{+}{\mathop{C}}\,\]
done
clear
C)
\[{{(C{{H}_{3}})}_{2}}\overset{+}{\mathop{C}}\,H\]
done
clear
D)
\[C{{H}_{3}}\overset{+}{\mathop{C}}\,{{H}_{2}}\]
done
clear
View Answer play_arrow
question_answer 97) Which of the following reacts in presence of anhydrous \[AlC{{l}_{3}}\] to give acetophenone?
A)
\[{{C}_{6}}{{H}_{6}}+C{{H}_{3}}COC{{H}_{3}}\]
done
clear
B)
\[{{C}_{6}}{{H}_{5}}OH+C{{H}_{3}}COC{{H}_{3}}\]
done
clear
C)
\[{{C}_{6}}{{H}_{5}}OH+C{{H}_{3}}COOH\]
done
clear
D)
\[{{C}_{6}}{{H}_{6}}+C{{H}_{3}}COCl\]
done
clear
View Answer play_arrow
question_answer 98) The isomers which can be interconverted through rotation around a single bond are
A)
conformers
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B)
diastereoisomers
done
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C)
enantiomers
done
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D)
position isomers
done
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View Answer play_arrow
question_answer 99) Phenol is the component of this fraction upon fractional distillation of petroleum
A)
light oil
done
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B)
middle Oil
done
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C)
heavy oil
done
clear
D)
pitch
done
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View Answer play_arrow
question_answer 100) Ethyl chloride on treatment with alcoholic alkali gives
A)
\[{{C}_{2}}{{H}_{6}}\]
done
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B)
\[C{{H}_{3}}CHO\]
done
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C)
\[{{C}_{2}}{{H}_{5}}OH\]
done
clear
D)
\[C{{H}_{2}}=C{{H}_{2}}\]
done
clear
View Answer play_arrow
question_answer 101) Total number of pairs of cranial nerves in human is
A)
12
done
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B)
10
done
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C)
6
done
clear
D)
20
done
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question_answer 102) The target organ for vasopressin is
A)
thyroid
done
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B)
kidneys
done
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C)
gonad
done
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D)
mammary glands
done
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View Answer play_arrow
question_answer 103) Dahlia is propagated through
A)
roots
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B)
stem
done
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C)
bud
done
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D)
leaf
done
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View Answer play_arrow
question_answer 104) Suspension of plant growth due to exogenous control is called
A)
vivipary
done
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B)
germination
done
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C)
quiescence
done
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D)
dormancy
done
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View Answer play_arrow
question_answer 105) These induce production of enzymes during seed germination
A)
auxins
done
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B)
cytokinins
done
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C)
ethylene
done
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D)
gibberellins
done
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View Answer play_arrow
question_answer 106) Many xerophytes accumulate this in response to stress
A)
glucose
done
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B)
proline
done
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C)
lysine
done
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D)
fatty acids
done
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View Answer play_arrow
question_answer 107) Whales show this adaptation strategy
A)
mimicry
done
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B)
hibernation
done
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C)
migration
done
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D)
camouflage
done
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View Answer play_arrow
question_answer 108) The bone of the knee cap is called
A)
patella
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B)
femur
done
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C)
tibia
done
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D)
fibula
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View Answer play_arrow
question_answer 109) Osteoporesis is a disorder of
A)
kidney
done
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B)
muscle
done
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C)
bones
done
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D)
heart
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View Answer play_arrow
question_answer 110) Smell is a function of this lobe
A)
frontal
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B)
parietal
done
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C)
occipital
done
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D)
temporal
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View Answer play_arrow
question_answer 111) The site of glycolysis is
A)
ribosomes
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B)
mitochondria
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C)
nucleus
done
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D)
cytoplasm
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View Answer play_arrow
question_answer 112) In respiration, the released energy forms
A)
AMP
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B)
ADP
done
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C)
ATP
done
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D)
Glucose
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View Answer play_arrow
question_answer 113) The number of bases found in RNA are
A)
4
done
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B)
3
done
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C)
5
done
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D)
2
done
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View Answer play_arrow
question_answer 114) The pseudouridine loop is present in
A)
DNA
done
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B)
tRNA
done
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C)
mRNA
done
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D)
rRNA
done
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View Answer play_arrow
question_answer 115) This is a structural polysaccharide
A)
starch
done
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B)
chitin
done
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C)
amylase
done
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D)
glycogen
done
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View Answer play_arrow
question_answer 116) 70S ribosomes have two units. These are
A)
50S + 30S
done
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B)
40S + 30S
done
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C)
50S + 20S
done
clear
D)
40S + 60S
done
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View Answer play_arrow
question_answer 117) The outer face of the outer membrane of Gram negative bacteria contains
A)
peptidoglycans
done
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B)
teichqic acids
done
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C)
lipopolysaccharides
done
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D)
mycoic acid
done
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View Answer play_arrow
question_answer 118) These impart rigidity to plasma membrane
A)
phospholipids
done
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B)
sterols
done
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C)
proteins
done
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D)
carbohydrates
done
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View Answer play_arrow
question_answer 119) Which one of the following has least similar characters?
A)
Family
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B)
Class
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C)
Genus
done
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D)
Species
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question_answer 120) Blue green algae belong to this kingdom
A)
Plantae
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B)
Protista
done
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C)
Fungi
done
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D)
Monera
done
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question_answer 121) Which one of the following has characters of both plant and animal?
A)
Bacteria
done
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B)
Mycoplasma
done
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C)
Euglena
done
clear
D)
Paramecium
done
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question_answer 122) The shape of the Micrococcus bacteria is
A)
rod
done
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B)
spiral
done
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C)
oval
done
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D)
coil
done
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View Answer play_arrow
question_answer 123) What is called Dahlia starch?
A)
Cellulose
done
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B)
Chitin
done
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C)
Inulin
done
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D)
Glycogen
done
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View Answer play_arrow
question_answer 124) The fastestenzyme among the following is
A)
urease
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B)
trypsin
done
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C)
amylase
done
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D)
carbonic anhydrase
done
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View Answer play_arrow
question_answer 125) Km value of an enzyme is substrate concentration at
A)
\[\frac{1}{4}\,{{V}_{\max }}\]
done
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B)
\[2\,{{V}_{\max }}\]
done
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C)
\[\frac{1}{2}\,{{V}_{\max }}\]
done
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D)
\[{{V}_{\max }}\]
done
clear
View Answer play_arrow
question_answer 126) This fungus is not edible
A)
Agaricus
done
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B)
Toadstool
done
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C)
Puffballs
done
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D)
Morchella
done
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question_answer 127) Aflatoxin is produced by a
A)
virus
done
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B)
bacteria
done
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C)
Ascomycota fungi
done
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D)
Basidiomycota fungi
done
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View Answer play_arrow
question_answer 128) Number of cotyledons in Pinus seed are
A)
1
done
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B)
2
done
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C)
3
done
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D)
many
done
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View Answer play_arrow
question_answer 129) These are called amphibians of plant kingdom
A)
Bryophytes
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B)
Brown algae
done
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C)
Green algae
done
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D)
Riccia
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View Answer play_arrow
question_answer 130) Pigment common to all algae is
A)
alginate
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B)
carotenoids
done
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C)
phycocyanin
done
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D)
chlorophyll
done
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View Answer play_arrow
question_answer 131) Mycoplasmas are sensitive to
A)
tetracyclines
done
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B)
penicillin
done
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C)
sugars
done
clear
D)
amino acids
done
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View Answer play_arrow
question_answer 132) This bacteria produces a well known insecticide
A)
B. thuringiensis
done
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B)
B. polymyxa
done
clear
C)
B. brevis
done
clear
D)
B. licheniformis
done
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View Answer play_arrow
question_answer 133) Nutrition in Amoeba is
A)
holophytic
done
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B)
parasitic
done
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C)
holozoic
done
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D)
saprobic
done
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View Answer play_arrow
question_answer 134) Which one is an antinutritional factor?
A)
Lysine
done
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B)
Tryptophan
done
clear
C)
Albumin
done
clear
D)
Glucosinolates
done
clear
View Answer play_arrow
question_answer 135) Xanthomonas citri is a pathogen responsible for a disease in this crop.
A)
potato
done
clear
B)
Citrus
done
clear
C)
tomato
done
clear
D)
wheat
done
clear
View Answer play_arrow
question_answer 136) Flooding of the field is an effective control measure for this type of pathogen
A)
Fungi
done
clear
B)
Vacteria
done
clear
C)
Nematode
done
clear
D)
Viruses
done
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View Answer play_arrow
question_answer 137) Protoplasts of a plant cell are produced by treatment with
A)
Cellulase
done
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B)
Pectinase
done
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C)
PEG
done
clear
D)
Both [b] and [c]
done
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View Answer play_arrow
question_answer 138) Processing of single cell protein generally involves removal of
A)
nucleic acids
done
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B)
fats
done
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C)
carbohydrates
done
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D)
oils
done
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View Answer play_arrow
question_answer 139) An animal, which comes out at night and hides during the day is
A)
diurnal
done
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B)
nocturnal
done
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C)
cursorial
done
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D)
arboreal
done
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View Answer play_arrow
question_answer 140) Sponges belong to this phylum
A)
Mollusca
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B)
Nematoda
done
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C)
Porifera
done
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D)
Chordata
done
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View Answer play_arrow
question_answer 141) The percentage of mutant alleles, which are produced spontaneously and is beneficial to the organism is about
A)
0.1
done
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B)
10
done
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C)
50
done
clear
D)
1
done
clear
View Answer play_arrow
question_answer 142) Isotonic solutions have same
A)
normality
done
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B)
pH
done
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C)
temperature
done
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D)
osmolarity
done
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View Answer play_arrow
question_answer 143) These organisms have chloride cells
A)
plants
done
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B)
freshwater fish -
done
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C)
Protozoa
done
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D)
birds
done
clear
View Answer play_arrow
question_answer 144) The major nitrogenous waste of shark is
A)
urea
done
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B)
\[N{{H}_{3}}\]
done
clear
C)
uric acid
done
clear
D)
amino acid
done
clear
View Answer play_arrow
question_answer 145) Metanephridia is the excretory system in
A)
cockroach
done
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B)
locust
done
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C)
earthworm
done
clear
D)
birds
done
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View Answer play_arrow
question_answer 146) Angiotensin II works as
A)
enzyme
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B)
antibody
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C)
coenzyme
done
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D)
hormone
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View Answer play_arrow
question_answer 147) Actih is
A)
an enzyme
done
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B)
a contractile protein
done
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C)
a hormone
done
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D)
a vitamin
done
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View Answer play_arrow
question_answer 148) Interferons are
A)
nucleoproteins
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B)
glycoproteins
done
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C)
lipoproteins
done
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D)
ribosomal proteins
done
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View Answer play_arrow
question_answer 149) This is a primary lymphoid organ
A)
thymus
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B)
lymph nodes
done
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C)
spleen
done
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D)
tonsils
done
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question_answer 150) Matching of the following is necessary for successful organ transplant
A)
Rh factor
done
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B)
ABO blood group
done
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C)
MHC antigens
done
clear
D)
Hypersensitivity
done
clear
View Answer play_arrow