question_answer 1) Which of the following has centre of mass not situated in the material of body?
A)
A rod bent in the form of a circle
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B)
Solid sphere
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C)
Cricket bat
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D)
None of the above
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question_answer 2) In a carnival ride the passengers travel in a circle of radius 5.0 m, making one complete circle in 4.0 s. What is the acceleration?
A)
24.6 m/s2
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B)
12.3 m/s2
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C)
6.15 m/s2
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D)
49.2 m/s2
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question_answer 3) A road is 8 m wide. Its radius of curvature is 40 m. The outer edge is above the lower edge by a distance of 1.2 m. This road is most suited for a velocity of
A)
5.7 m/s
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B)
7.7 m/s
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C)
36.1 m/s
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D)
9.7 m/s
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question_answer 4) A 0.5 kg ball moves in a circle of radius 0.4 m at a velocity of 4 m/s. The centripetal force on the ball is.
A)
10 N
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B)
20 N
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C)
40 N
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D)
80 N
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question_answer 5) A rod of length L, whose lower end is sliding along the horizontal plane, starts to topple from the vertical position. The velocity of the upper end when it hits the ground is
A)
\[\sqrt{gL}\]
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B)
\[\sqrt{3gL}\]
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C)
\[\sqrt{5gL}\]
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D)
\[3\sqrt{gL}\]
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question_answer 6) Two bodies of moments of inertia \[{{I}_{1}}\] and \[{{I}_{2}}\] \[({{I}_{1}}>{{I}_{2}})\]have equal angular momentum. If \[{{E}_{1,}}\]\[{{E}_{2}}\] are their kinetic energies of rotation, then
A)
\[{{E}_{1}}>{{E}_{2}}\]
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B)
\[{{E}_{1}}={{E}_{2}}\]
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C)
\[{{E}_{1}}<{{E}_{2}}\]
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D)
cannot be said
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question_answer 7) An artificial satellite revolves around the earth in a circular orbit with a speed v. If m is the mass of the satellite, its total energy is
A)
\[\frac{1}{2}m{{v}^{2}}\]
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B)
\[-\frac{1}{2}m{{v}^{2}}\]
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C)
\[-m{{v}^{2}}\]
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D)
\[\frac{3}{2}m{{v}^{2}}\]
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question_answer 8) In an earth's satellite the astronaut stands on a platform. His weight as indicated by the balance will be
A)
6g
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B)
2g
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C)
8 g
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D)
zero
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question_answer 9) A body of mass m is moved to a height h equal to the radius of the earth. The increase in potential energy is
A)
\[2mgR\]
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B)
\[mgR\]
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C)
\[\frac{1}{2}mgR\]
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D)
\[\frac{1}{4}mgR\]
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question_answer 10) At which of the following temperatures, the value of surface tension of water is minimum?
A)
\[4{}^\circ C\]
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B)
\[25{}^\circ C\]
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C)
\[50{}^\circ C\]
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D)
\[75{}^\circ C\]
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question_answer 11) Work done in spliting a drop of water of 1 mm radius into 64 droplets is (surface tension of waters \[=72\times {{10}^{-3}}J/{{m}^{2}}\])
A)
\[2.0\times {{10}^{-6}}J\]
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B)
\[2.7\times {{10}^{-6}}J\]
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C)
\[4\times {{10}^{-6}}J\]
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D)
\[5.4\times {{10}^{-6}}J\]
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question_answer 12) A black body at 227oC radiates heat at the rate of \[7\text{ }cal/c{{m}^{2}}-s.\] At a temperature of 727°C, the rate of heat radiated in same units will be
A)
80
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B)
60
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C)
50
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D)
112
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question_answer 13) The vertical extension in a light spring by a weight of 1 kg suspended from the wire is 9.8 cm. The period of oscillation is
A)
\[20\pi s\]
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B)
\[2\pi \]
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C)
\[\frac{2\pi }{10}s\]
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D)
\[200\pi \,s\]
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question_answer 14) A panicle of mass 10 g is describing SHM along a straight line with period of 2 s and amplitude of 10 cm. Its kinetic energy when it is al 5 cm from its equilibrium position is
A)
\[3.75{{\pi }^{2}}\,erg\]
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B)
\[375{{\pi }^{2}}\,erg\]
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C)
\[0.375{{\pi }^{2}}\,erg\]
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D)
\[37.5{{\pi }^{2}}\,erg\]
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question_answer 15) The angular amplitude of a simple pendulum is \[{{\theta }_{0.}}\] The maximum tension in its string will be
A)
\[mg(1-{{\theta }_{0}})\]
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B)
\[mg(1+{{\theta }_{0}})\]
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C)
\[mg(1-\theta \,_{0}^{2})\]
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D)
\[mg(1+\theta \,_{0}^{2})\]
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question_answer 16) It is possible to recognise a person by hearing his voice even if he is hidden behind a solid wall. This is due to the fact that his voice
A)
has a definite capacity
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B)
has a definite quality
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C)
has definite pitch
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D)
can penetrate the wall
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question_answer 17) The velocity of sound in air at NTP is 330 m/s. What will be its value when temperature is doubled and pressure is halved?
A)
330 m/s
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B)
165 m/s
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C)
330 \[\sqrt{2}\] m/s
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D)
\[\frac{330}{\sqrt{2}}\]m/s
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question_answer 18) The intensity of sound gets reduced by 10% on passing through a slab. The reduction in intensity on passing through two consecutive slabs would be
A)
20%
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B)
19%
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C)
5%
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D)
50%
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question_answer 19) Point charges + 4q, - q and + 4q are kept on the \[x\]-axis at points \[x=0,x-a\] and \[x=2a\] respectively, then
A)
only - q is in stable equilibrium
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B)
all the charges are in stable equilibrium
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C)
all the charges are in unstable equilibrium
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D)
none of the above
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question_answer 20) If \[{{E}_{a}}\] be the electric field strength of a short dipole at a point on its axial line and \[{{E}_{e}}\] that on equilateral line at the same distance, then
A)
\[E=2{{E}_{a}}\]
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B)
\[E{{ }_{a}}=2{{E}_{e}}\]
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C)
\[E{{ }_{a}}={{E}_{e}}\]
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D)
none of these
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question_answer 21) If emf E = 4 cos 1000t volt is applied to an L-R circuit of inductance 3 mH and resistance 40\[\Omega \] the amplitude of current in the circuit is
A)
\[\frac{4}{\sqrt{7}}A\]
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B)
\[1.0A\]
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C)
\[\frac{4}{7}A\]
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D)
\[0.8A\]
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question_answer 22)
A candidate connects a moving coil ammeter A and a moving coil voltmeter V and a resistance R as shown. If the voltmeter reads 20 V and the ammeter reads 4 A, then R is
A)
equal to 5\[\Omega \]
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B)
greater than 5\[\Omega \]
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C)
less than 5\[\Omega \]
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D)
none of these
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question_answer 23)
A wire of length L has resistance R. It is bent at mid-point such that the two halves make an angle 90° with each other. The new resistance would be
A)
R
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B)
\[\sqrt{2}R\]
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C)
\[\frac{R}{\sqrt{2}}\]
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D)
\[\frac{R}{4}\]
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question_answer 24) The ratio of magnetic potentials due magnetic dipole in the end on position to that broad side on position for the same distance from it is
A)
zero
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B)
infinite
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C)
1
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D)
2
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question_answer 25) In the unmagnetized state magnetic domain of a magnetic substance are oriented at
A)
\[60{}^\circ \]
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B)
\[90{}^\circ \]
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C)
randomly
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D)
\[150{}^\circ \]
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question_answer 26) When a ferromagnetic material is heated above its Curie temperature it
A)
gets demagnetized
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B)
becomes diamagnetic
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C)
behaves like a paramagnetic substance
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D)
remains unaffected
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question_answer 27) Four independent waves are expressed as (i)\[{{y}_{1}}={{a}_{1}}\sin \omega t\] (ii)\[{{y}_{1}}={{a}_{2}}\sin 2\omega t\] (iii)\[{{y}_{3}}={{a}_{3}}\cos \omega t\]and (iv)\[{{y}_{4}}={{a}_{4}}\sin \,\,\left( \omega t+\frac{\pi }{3} \right)\] The interference is possible between
A)
(i) and (iii)
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B)
(i) and (iv)
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C)
(ii) and (iv)
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D)
not possible at all
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question_answer 28)
Two gases A and B at same pressure contain number of moles \[{{n}_{1}}\] and \[{{n}_{2}}\] Their volume temperature graphs are shown in figure. Then the ratio \[{{n}_{1}}/{{n}_{2}}\]is
A)
1
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B)
\[\frac{1}{2}\]
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C)
\[\frac{1}{3}\]
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D)
\[3\]
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question_answer 29) A DC circuit contains 10 \[\Omega \] of resistance in series with 10 H coil. The impedance of the circuit is
A)
10 \[\Omega \]
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B)
20\[\Omega \]
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C)
1\[\Omega \]
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D)
zero
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question_answer 30) Two coils of self-inductances \[{{L}_{1}}\] and \[{{L}_{2}}\] are placed so close together that effective flux in one coil is completely linked with the other. If M is the mutual inductance between them, then
A)
\[M={{L}_{1}}{{L}_{2}}\]
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B)
\[M={{L}_{1}}/{{L}_{2}}\]
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C)
\[M=L\]
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D)
\[M=\sqrt{{{L}_{1}}{{L}_{2}}}\]
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question_answer 31) Two coherent monochromatic light beams of intensities \[I\] and 4 \[I\] superimpose. The maximum and minimum possible intensities in the resulting beam are respectively
A)
5\[I\] and \[I\]
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B)
5\[I\] and 3\[I\]
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C)
3\[I\]and\[I\]
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D)
9 \[I\]and\[I\]
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question_answer 32) Ordinary light incident on a glass slab at the polarising angle suffers a deviation of 220. The value of the angle of refraction in glass in this case is
A)
\[56{}^\circ\]
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B)
\[68{}^\circ\]
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C)
\[34{}^\circ\]
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D)
\[22{}^\circ\]
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question_answer 33) A source of sound emits 200 \[\pi \]W power which is uniformly distributed over a sphere of 10 m radius. What is the loudness of sound on the surface of a sphere?
A)
200 dB
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B)
200\[\pi \] dB
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C)
120 dB
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D)
120\[\pi \]dB
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question_answer 34) A radio isotope has half-life of 5 yr. The fraction of the atoms of this material that would decay in 15 yr will be
A)
1
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B)
\[\frac{2}{3}\]
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C)
\[\frac{7}{8}\]
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D)
\[\frac{5}{8}\]
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question_answer 35) The ground state energy of H-atom is 13.6 eV. The energy needed to ionize H-atom from its second excited state is
A)
1.51 eV
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B)
3.4 eV
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C)
13.6 eV
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D)
12.1 eV
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question_answer 36) Forward bias characteristics of a p-n junction diode is used in which of the following devices?
A)
Transistor
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B)
Tank circuit
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C)
Rectifier
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D)
All of these
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question_answer 37) The energy gap between conduction band and valence band is of the order of 0.07 eV. It is a/an
A)
insulator
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B)
conductor
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C)
semiconductor
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D)
alloy
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question_answer 38) In an L-R circuit, the current increases to three fourth of its maximum value in 4 s, then the S- time constant of the circuit is
A)
\[2{{\log }_{e}}\,2\]
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B)
\[\frac{4}{{{\log }_{e}}2}\]
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C)
\[\frac{2}{{{\log }_{e}}2}\]
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D)
\[\frac{{{\log }_{e\,}}2}{2}\]
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question_answer 39) An oscillator is basically an amplifier with gain
A)
less than unity
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B)
more than unity
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C)
zero
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D)
0.5
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question_answer 40) A particle of mass m at rest decays into two particles of masses \[{{m}_{1}}\]and \[{{m}_{2}}\] having non-zero velocities. The ratio of de-Broglie wavelengths of the particles\[\frac{{{\lambda }_{1}}}{{{\lambda }_{2}}}\]is
A)
\[\frac{{{m}_{1}}}{{{m}_{2}}}\]
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B)
\[\frac{{{m}_{2}}}{{{m}_{1}}}\]
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C)
\[1.0\]
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D)
\[\sqrt{\frac{{{m}_{2}}}{{{m}_{1}}}}\]
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question_answer 41)
Figure shows a P-V diagram. How does the work done in the process change with time ?
A)
First decreases and then increases
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B)
First increases and then decreases
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C)
Continuously decreases
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D)
Continuously increases
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question_answer 42) Two identical galvanometers are taken, one is to be converted into an ammeter and other into a milliammeter. Shunt of milliammeter compared to ammeter is
A)
less
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B)
more
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C)
zero
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D)
none of these
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question_answer 43) If the vibrations of a string are to be increased by a factor of two, the tension in the string should be made
A)
twice
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B)
four times
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C)
eight rimes
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D)
half
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question_answer 44) A triode valve has an amplification factor of 20 and its plate is given a potential of 300 V. The grid voltage to reduce the plate current to zero, is
A)
25V
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B)
15V
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C)
12V
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D)
10V
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question_answer 45) An electron of mass m and charge e is accelerated from rest through a potential difference V in vacuum. The final speed will be
A)
\[\frac{2eV}{m}\]
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B)
\[V\sqrt{\frac{e}{m}}\]
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C)
\[\sqrt{\frac{3eV}{m}}\]
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D)
\[\sqrt{\frac{2eV}{m}}\]
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question_answer 46) In a circuit, the current lags behind the voltage by a phase difference of \[\pi /2,\]the circuit will contain which of the following?
A)
Only R
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B)
Only C
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C)
R and C
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D)
Only L
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question_answer 47) Which one of the following does not support the wave nature of light?
A)
Photoelectric effect
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B)
Interference
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C)
Polarization
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D)
Diffraction
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question_answer 48) A siren emitting sound of frequency 800 Hz is going away from a static listener with a speed of 30 m/s. Frequency of sound to be heard by the listener is (velocity of sound = 330 m/s)
A)
286.5 Hz
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B)
481.2 Hz
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C)
733.3 Hz
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D)
644.8 Hz
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question_answer 49) A wire fixed at the upper end stretches by length \[\Delta l\] by applying a force F. The work done in stretching is
A)
\[\frac{F}{2\Delta l}\]
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B)
\[F\Delta l\]
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C)
\[2F\Delta l\]
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D)
\[\frac{F\Delta l}{2}\]
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question_answer 50) The Young's modulus of a wire is numerically equal to the stress which will
A)
not change the length of the wire
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B)
double the length of the wire
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C)
increase the length
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D)
change the radius of the wire to half
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question_answer 51) The musical interval between two tones of frequency 400 Hz and 200 Hz is
A)
2
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B)
200
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C)
1
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D)
0.5
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question_answer 52) Which of the following has the minimum resistance?
A)
Voltmeter
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B)
Millivoltmeter
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C)
Ammeter
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D)
Milliammeter
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question_answer 53) N identical cells, each of emf E, are connected in parallel. The emf of the combination is
A)
NE
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B)
E
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C)
N2E
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D)
E/N
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question_answer 54) According to Newton's law of cooling, the rate of cooling of a body is proportional to \[{{(\Delta \theta )}^{n}},\]where \[\Delta \theta \] is the difference of the temperature of the body and the surroundings and n is equal to
A)
2
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B)
3
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C)
4
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D)
1
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question_answer 55) Which of the following parameters does not characterize the thermodynamic state of matter?
A)
Volume
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B)
Temperature
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C)
Pressure
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D)
Work
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question_answer 56) A 30 \[\pi F\] capacitor is charged by a constant current of 30 mA. If the capacitor is initially uncharged, how long does it take for the potential difference to reach 400 V?
A)
0.2s
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B)
0.4s
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C)
0.6s
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D)
0.8s
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question_answer 57) A panicle moving with a velocity \[\frac{1}{10}\]the of light will cross a nucleus in about
A)
\[{{10}^{-8}}s\]
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B)
\[{{10}^{-12}}s\]
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C)
\[{{10}^{-47}}s\]
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D)
\[{{10}^{-21}}s\]
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question_answer 58) Which of the following nuclei is fissionable but not possible?
A)
\[_{92}{{U}^{235}}\]
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B)
\[_{92}{{U}^{233}}\]
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C)
\[_{92}{{U}^{238}}\]
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D)
\[_{94}{{U}^{239}}\]
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question_answer 59) In a common base amplifier, the phase difference between the input signal voltage and output voltage is
A)
\[\frac{\pi }{4}\]
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B)
\[\pi \]
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C)
zero
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D)
\[\frac{\pi }{2}\]
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question_answer 60) Therm-ions are
A)
photons
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B)
protons
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C)
electrons
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D)
nuclei
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question_answer 61) What is the half-life of\[_{6}{{C}^{14}},\]if its disintegration constant is\[2.31\times {{10}^{-4}}y{{r}^{-1}}\]?
A)
\[0.3\times {{10}^{4}}yr\]
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B)
\[0.3\times {{10}^{3}}yr\]
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C)
\[0.3\times {{10}^{8}}yr\]
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D)
\[0.3\times {{10}^{2}}yr\]
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question_answer 62) What is the frequency of a X-ray photon whose momentum is\[1.1\times {{10}^{-23}}kg-m{{s}^{-2}}\]?
A)
\[5\times {{10}^{16}}Hz\]
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B)
\[0.5\times {{10}^{27}}Hz\]
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C)
\[0.5\times {{10}^{18}}Hz\]
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D)
\[5\times {{10}^{18}}Hz\]
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question_answer 63) Metals are good conductor of electricity because they contain
A)
a network structure
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B)
ionic bonds
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C)
very few valence electrons
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D)
free electrons
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question_answer 64) Which of the following is an ester?
A)
Coconut oil
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B)
Kerosene oil
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C)
Soap
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D)
Glycerine
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question_answer 65) Identify the ?C? in the reaction \[RN{{H}_{2}}\xrightarrow{HN{{O}_{2}}}A+B+C\uparrow \]
A)
\[N{{H}_{3}}\]
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B)
\[{{O}_{2}}\]
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C)
\[{{N}_{2}}\]
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D)
\[C{{O}_{2}}\]
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question_answer 66) The magnitude of orbital angular momentum of an electron of azimuthal quantum number 2 is
A)
\[\frac{2h}{2\pi }\]
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B)
\[\frac{\sqrt{6}h}{2\pi }\]
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C)
\[\frac{\sqrt{2}h}{2\pi }\]
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D)
\[\frac{6h}{2\pi }\]
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question_answer 67) Hydrolysis of lactose with dilute acid yields
A)
D-glucose + D-glucose
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B)
D-glucose + D-galactose
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C)
D-glucose + D-fructose
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D)
D-galactose + D-fructose
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question_answer 68) The pH of a 0.02 M solution of\[HCl\]is
A)
2.2
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B)
2.0
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C)
0.3
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D)
1.7
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question_answer 69) The solubility product of\[Mg{{(OH)}_{2}}\]at\[25{}^\circ C\]is \[1.4\times {{10}^{-11}}\]. What is the solubility of\[Mg{{(OH)}^{2}}\]in g/L?
A)
0.0047 g/L
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B)
0.047 g/L
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C)
0.0087 g/L
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D)
0.087 g/L
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question_answer 70) \[Ni/N{{i}^{2+}}[1.0M]||A{{u}^{3+}}[1.0M]/Au\]where\[E{}^\circ \] for\[N{{i}^{2+}}/Ni\]is\[-0.25\,V\,{{E}^{o}}\]for\[A{{u}^{3+}}/Au\] is 0.150V) What is the emf of the cell?
A)
+ 0.4V
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B)
\[-1.75V\]
done
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C)
+ 1.25V
done
clear
D)
+ 1.75V
done
clear
View Answer play_arrow
question_answer 71) The heat of formation of\[C{{O}_{2}}\]is\[-393\text{ }kJ\text{ }mo{{l}^{-1}}\] The amount of heat evolved in the formation of 0.156 kg of\[C{{O}_{2}}\]
A)
\[-1393kJ\]
done
clear
B)
\[+1165.5\,kJ\]
done
clear
C)
\[+1275.9kJ\]
done
clear
D)
\[-1165.5\text{ }kJ\]
done
clear
View Answer play_arrow
question_answer 72) Which is used to obtain salicylic acid from phenol?
A)
\[CC{{l}_{4}}\]
done
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B)
\[CHC{{l}_{3}}\]
done
clear
C)
\[{{C}_{2}}{{H}_{5}}OH\]
done
clear
D)
\[CC{{l}_{2}}{{F}_{2}}\]
done
clear
View Answer play_arrow
question_answer 73) Dehydration of glycerol produces
A)
propanone
done
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B)
allyl alcohol
done
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C)
glycol
done
clear
D)
acrolein
done
clear
View Answer play_arrow
question_answer 74) Which is the strongest acid?
A)
\[ClC{{H}_{2}}COOH\]
done
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B)
\[C{{H}_{3}}COOH\]
done
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C)
\[C{{l}_{2}}CHCOOH\]
done
clear
D)
\[CC{{l}_{3}}COOH\]
done
clear
View Answer play_arrow
question_answer 75) \[C{{H}_{3}}Br+KCN(alco.)\xrightarrow{{}}X\xrightarrow[Na+{{C}_{2}}{{H}_{5}}OH]{\operatorname{Re}duction}Y\]. What is Y in the series?
A)
\[C{{H}_{3}}CN\]
done
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B)
\[{{C}_{2}}{{H}_{5}}CN\]
done
clear
C)
\[{{C}_{2}}{{H}_{5}}N{{H}_{2}}\]
done
clear
D)
\[C{{H}_{3}}N{{H}_{2}}\]
done
clear
View Answer play_arrow
question_answer 76) When fluorine reacts with hot and cone. \[NaOH,\]it gives
A)
\[N{{a}_{2}}O\]
done
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B)
\[Na\]
done
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C)
\[{{H}_{2}}\]
done
clear
D)
\[{{O}_{2}}\]
done
clear
View Answer play_arrow
question_answer 77) Which of the compound is optically active?
A)
1-butanol
done
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B)
Ethanol
done
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C)
2-butanol
done
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D)
Isopropyl alcohol
done
clear
View Answer play_arrow
question_answer 78) In acidic medium\[MnO_{4}^{-}\]is converted to\[M{{n}^{2+}}\]. The quantity of electricity in faraday required to reduce 0.5 mole of \[MnO_{4}^{-}\]to\[M{{n}^{2+}}\]would be
A)
2.5
done
clear
B)
1
done
clear
C)
5
done
clear
D)
0.5
done
clear
View Answer play_arrow
question_answer 79) During electrolysis of water the volume of oxygen liberated is\[2.24\text{ }d{{m}^{3}}\]. The volume of hydrogen liberated, under same conditions will be
A)
\[2.24\,d{{m}^{3}}\]
done
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B)
\[1.12\,d{{m}^{3}}\]
done
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C)
\[4.48\,d{{m}^{3}}\]
done
clear
D)
\[0.56\,d{{m}^{3}}\]
done
clear
View Answer play_arrow
question_answer 80) Crystalline form of silica is called
A)
crystalline silicon
done
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B)
quartz
done
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C)
rock
done
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D)
talc
done
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View Answer play_arrow
question_answer 81) The elements commonly used for making transistors are
A)
Ga and In
done
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B)
C and Si
done
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C)
P and As
done
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D)
Si and Ge
done
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View Answer play_arrow
question_answer 82) 2-pentanone and 3-pentanone can be distinguished by
A)
cannizaro's reaction
done
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B)
iodoform reaction
done
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C)
aldol condensation
done
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D)
Clemmensen's reduction
done
clear
View Answer play_arrow
question_answer 83) Proteins are
A)
polypeptides with low molecular weights
done
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B)
polypeptides with high molecular weights
done
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C)
polymers of amides
done
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D)
polymers of secondary amines
done
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View Answer play_arrow
question_answer 84) End product of the hydrolysis of\[Xe{{F}_{6}}\]is
A)
\[XeO{{F}_{4}}\]
done
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B)
\[Xe{{O}_{2}}{{F}_{2}}\]
done
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C)
\[Xe{{O}_{3}}\]
done
clear
D)
\[Xe{{O}_{3}}\]
done
clear
View Answer play_arrow
question_answer 85) Which method is not used for the extraction of\[Al\]?
A)
Van-Arkel
done
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B)
Serpeck
done
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C)
Baeyer
done
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D)
Hall-Heroult
done
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View Answer play_arrow
question_answer 86) The radiant energy from the sun is due to
A)
combustion
done
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B)
chemical reaction
done
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C)
nuclear fusion
done
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D)
nuclear fission
done
clear
View Answer play_arrow
question_answer 87) Which will give cannizaro reaction?
A)
\[C{{l}_{3}}C-CHO\]
done
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B)
\[{{C}_{6}}{{H}_{5}}CHO\]
done
clear
C)
\[(C{{H}_{3}}){{ }_{3}}-C-CHO\]
done
clear
D)
All of the above
done
clear
View Answer play_arrow
question_answer 88) Aluminium becomes passive on treatment with
A)
dil.\[HN{{O}_{3}}\]
done
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B)
cone.\[HN{{O}_{3}}\]
done
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C)
dil. \[{{H}_{2}}S{{O}_{4}}\]
done
clear
D)
none of these
done
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View Answer play_arrow
question_answer 89) Which is not a true peroxide?
A)
\[{{H}_{2}}{{O}_{2}}\]
done
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B)
Caro's acid
done
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C)
Marshall's acid
done
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D)
Thiosulphuric acid
done
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View Answer play_arrow
question_answer 90)
The two isomers given below are
A)
enantiomers
done
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B)
diastereomers
done
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C)
mesomers
done
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D)
position isomers
done
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View Answer play_arrow
question_answer 91) \[C{{H}_{3}}CH{{I}_{2}}\xrightarrow{KCN}\xrightarrow{{{H}_{2}}O,\Delta }?\] Here the end product would be
A)
2-cyano propionic acid
done
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B)
ethane-1,1-dicarboxylic acid
done
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C)
2-methyl ethanoic acid
done
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D)
propionic acid
done
clear
View Answer play_arrow
question_answer 92) A lyophobic colloid is
A)
\[A{{s}_{2}}{{S}_{3}}\]
done
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B)
starch
done
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C)
agar-agar
done
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D)
gelatin
done
clear
View Answer play_arrow
question_answer 93) Which of the following is correct according to Freundlich adsorption isotherm?
A)
\[\frac{x}{m}\propto {{p}^{0}}\]
done
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B)
\[\frac{x}{m}\propto p\]
done
clear
C)
\[\frac{x}{m}\propto \frac{1}{p}\]
done
clear
D)
\[\frac{x}{m}\propto {{p}^{1/n}}\]
done
clear
View Answer play_arrow
question_answer 94) The rust of iron is catalysed by which of the following?
A)
\[Fe\]
done
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B)
\[{{O}_{2}}\]
done
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C)
\[Zn\]
done
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D)
\[{{H}^{+}}\]
done
clear
View Answer play_arrow
question_answer 95) An ester linkage is present in
A)
nylon-6
done
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B)
nylon-6,6
done
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C)
dacron
done
clear
D)
rayon
done
clear
View Answer play_arrow
question_answer 96) Williamson's synthesis involves
A)
\[{{S}_{N}}1\] mechanism
done
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B)
nucleophilic addition
done
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C)
\[{{S}_{N}}2\]mechanism
done
clear
D)
\[{{S}_{E}}\]mechanism
done
clear
View Answer play_arrow
question_answer 97) HF is not preserved in glass bottle because
A)
it reacts with the visible part of the light
done
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B)
it reacts with ^he sodium oxide of the glass
done
clear
C)
it reacts with the aluminium oxide of the glass composition
done
clear
D)
it reacts with\[Si{{O}_{2}}\]of the glass
done
clear
View Answer play_arrow
question_answer 98) Oils can be converted into fats by
A)
hydrogenolysis
done
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B)
hydrogenation
done
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C)
decarboxylation
done
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D)
hydration
done
clear
View Answer play_arrow
question_answer 99) The geometry of methane molecule is
A)
tetrahedral
done
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B)
pyramidal
done
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C)
octahedral
done
clear
D)
square planar
done
clear
View Answer play_arrow
question_answer 100) Heisenberg's uncertainty principle can be explained as
A)
\[\Delta x\ge \frac{\Delta p\times h}{4\pi }\]
done
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B)
\[\Delta x\times \Delta p\ge \frac{h}{4\pi }\]
done
clear
C)
\[\Delta x\times \Delta p\ge \frac{h}{\pi }\]
done
clear
D)
\[\Delta p\ge \frac{\pi h}{\Delta x}\]
done
clear
View Answer play_arrow
question_answer 101) The bond energy is the energy required to
A)
dissociate one mole of the substance
done
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B)
dissociate bond in 1 kg of the substance
done
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C)
break one mole of similar bonds
done
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D)
break bonds in one mole of the substance
done
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View Answer play_arrow
question_answer 102) Heat of neutralisation of an acid with a base is 13.7 kcal when
A)
both acid and base are weak
done
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B)
acid is weak and base is strong
done
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C)
both acid and base are strong
done
clear
D)
acid is strong and base is weak
done
clear
View Answer play_arrow
question_answer 103) Hess's law is based on
A)
law of conservation of mass
done
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B)
law of conservation of energy
done
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C)
enthalpy is a state function
done
clear
D)
none of the above
done
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View Answer play_arrow
question_answer 104) In a lead storage battery, reaction at cathode is
A)
\[Pb+SO_{4}^{2-}\xrightarrow{{}}PbS{{O}_{4}}+2{{e}^{-}}\]
done
clear
B)
\[Pb+Pb{{O}_{2}}+{{H}_{2}}S{{O}_{4}}\] \[\xrightarrow{{}}2PbS{{O}_{4}}+2{{H}_{2}}O\]
done
clear
C)
\[PbS{{O}_{4}}+2{{e}^{-}}\xrightarrow[{}]{{}}pb+SO_{4}^{2-}\]
done
clear
D)
\[Pb{{O}_{2}}+4{{H}^{+}}+SO_{4}^{2-}+2{{e}^{-}}\] \[\xrightarrow[{}]{{}}pbS{{O}_{4}}+2{{H}_{2}}O\]
done
clear
View Answer play_arrow
question_answer 105) A buffer solution contains 500 mL of 0.2 M \[C{{H}_{3}}COONa\]and 500 mL of\[0.1\text{ }M\text{ }C{{H}_{3}}COOH\]. 1L of water is added to this buffer, pH before and after dilution will be (\[p{{k}_{a}}\] of\[C{{H}_{3}}COOH=4.74\])
A)
5.04, 3.74
done
clear
B)
5.04, 5.04
done
clear
C)
5.04, 4.89
done
clear
D)
9.56, 9.56
done
clear
View Answer play_arrow
question_answer 106) In coagulating the colloidal solution of\[A{{s}_{2}}{{S}_{3}}\] which has the minimum coagulating value?
A)
\[NaCl\]
done
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B)
\[KCl\]
done
clear
C)
\[BaC{{l}_{2}}\]
done
clear
D)
\[AlC{{l}_{3}}\]
done
clear
View Answer play_arrow
question_answer 107) What is binding energy in \[_{5}^{11}\] B nucleus, if mass is 0.08181 amu?
A)
\[1.2\times {{10}^{-4}}erg/nucleus\]
done
clear
B)
\[8.2\times {{10}^{-4}}erg/nucleus\]
done
clear
C)
\[10.2\times {{10}^{-4}}erg/nucleus\]
done
clear
D)
\[1.9\times {{10}^{-4}}erg/nucleus\]
done
clear
View Answer play_arrow
question_answer 108) Which radioactive element is being used in cancer therapy?
A)
\[_{27}^{60}Co\]
done
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B)
\[_{28}^{62}Ni\]
done
clear
C)
\[_{56}^{140}Ba\]
done
clear
D)
\[_{15}^{32}P\]
done
clear
View Answer play_arrow
question_answer 109) Among third row elements, the IP value
A)
irregularly changes from left to right across the third row
done
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B)
increases from left to right across the third row
done
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C)
decrease for\[Na\]to\[Ar\]
done
clear
D)
remains constant
done
clear
View Answer play_arrow
question_answer 110) Hydrofluoric acid shows hydrogen bonding due to
A)
high electron affinity of fluorine
done
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B)
high bond dissociation energy of fluorine
done
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C)
high electronegativity of fluorine
done
clear
D)
none of the above
done
clear
View Answer play_arrow
question_answer 111) Which of the following products are formed when\[Si{{C}_{4}}\]vapour are passed over hot\[Mg\]?
A)
\[SiC{{l}_{2}}+MgC{{l}_{2}}\]
done
clear
B)
\[Si+MgC{{l}_{2}}\]
done
clear
C)
\[M{{g}_{2}}Si+MgC{{l}_{2}}\]
done
clear
D)
\[MgSiC{{l}_{2}}\]
done
clear
View Answer play_arrow
question_answer 112) Chloropicrin is used as an insecticide and has been used as tear war gas. The chloropicrin is
A)
\[C{{H}_{2}}ClCC{{l}_{3}}\]
done
clear
B)
\[CC{{l}_{3}}N{{O}_{2}}\]
done
clear
C)
\[C{{H}_{2}}(C{{H}_{3}})C{{H}_{2}}Cl\]
done
clear
D)
\[CH{{I}_{3}}\]
done
clear
View Answer play_arrow
question_answer 113)
Reagent in second step should be
A)
\[C{{H}_{3}}Cl\]
done
clear
B)
\[KOH+{{C}_{2}}{{H}_{5}}OH\]
done
clear
C)
\[KOH+{{C}_{2}}{{H}_{5}}SH\]
done
clear
D)
\[KOH+C{{l}_{2}}\]
done
clear
View Answer play_arrow
question_answer 114) Identify the product Y in the sequence\[C{{H}_{3}}CHO+C{{H}_{3}}MgI\xrightarrow{Ether}X\xrightarrow{{{H}_{2}}O/{{H}^{+}}}Y,\]is
A)
\[C{{H}_{3}}OH\]
done
clear
B)
\[C{{H}_{3}}C{{H}_{2}}OH\]
done
clear
C)
\[{{(C{{H}_{3}})}_{2}}CHOH\]
done
clear
D)
\[{{(C{{H}_{3}})}_{3}}COH\]
done
clear
View Answer play_arrow
question_answer 115) Two moles of acetic acid are heated with\[{{P}_{2}}{{O}_{5}}\] The product formed is
A)
2 moles of ethyl alcohol
done
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B)
formic anhydride
done
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C)
acetic anhydride
done
clear
D)
2 moles of methyl cyanide
done
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View Answer play_arrow
question_answer 116) The reaction,\[ROH+{{H}_{2}}C{{N}_{2}}\]in the presence of\[HB{{F}_{4}},\]gives the following product
A)
\[ROC{{H}_{3}}\]
done
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B)
\[RC{{H}_{2}}OH\]
done
clear
C)
\[ROHC{{N}_{2}}{{N}_{2}}\]
done
clear
D)
\[RC{{H}_{2}}C{{H}_{3}}\]
done
clear
View Answer play_arrow
question_answer 117) The conjugate base of \[(C{{H}_{3}}){{ }_{2}}\overset{+}{\mathop{N}}\,{{H}_{2}}\]is
A)
\[{{(C{{H}_{3}})}_{3}}N\]
done
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B)
\[{{(C{{H}_{3}})}_{2}}NH\]
done
clear
C)
\[{{(C{{H}_{3}})}_{2}}{{N}^{-}}\]
done
clear
D)
\[{{(C{{H}_{3}})}_{2}}{{N}^{+}}\]
done
clear
View Answer play_arrow
question_answer 118) Lecithin is an example of
A)
carbohydrate
done
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B)
hormones
done
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C)
vitamins
done
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D)
phospholipid
done
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View Answer play_arrow
question_answer 119) Artificial silk is
A)
nylon-6
done
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B)
rayon
done
clear
C)
nylon 66
done
clear
D)
none of these
done
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View Answer play_arrow
question_answer 120) Which of the following is common example of fibres?
A)
Bakelite
done
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B)
Buna-S
done
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C)
Nylon-66
done
clear
D)
PVC
done
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View Answer play_arrow
question_answer 121) Curdling of milk in small intestine occurs doe to the action of
A)
trypsin
done
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B)
erypsin
done
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C)
rennin
done
clear
D)
chymotrypsin
done
clear
View Answer play_arrow
question_answer 122) ADH controls water permeability of
A)
collecting tube
done
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B)
distal convoluted tubule
done
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C)
proximal convoluted tubule
done
clear
D)
Bowman's capsule
done
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View Answer play_arrow
question_answer 123) Biomagnification refers to
A)
rapid growth due to excessive intake of nutrients
done
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B)
increase in population size
done
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C)
decrease in population size
done
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D)
increase in concentration of non-degrabable pollutants as they pass through food chain
done
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View Answer play_arrow
question_answer 124) During the conduction of nerve impulse, the action potential is the result of movement of
A)
\[N{{a}^{+}}\]from intracellular fluid to extracellular fluid
done
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B)
\[N{{a}^{+}}\] from extracellular fluid to intracellular fluid
done
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C)
\[N{{a}^{+}}\] towards both directions
done
clear
D)
None of the above
done
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View Answer play_arrow
question_answer 125) The AIDS virus spreads through
A)
killer -T cells
done
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B)
helper T cells
done
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C)
suppressor T cells
done
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D)
carrier T cells
done
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View Answer play_arrow
question_answer 126) Apis dorsata refers to
A)
rock bee
done
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B)
little bee
done
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C)
Indian bee
done
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D)
European bee
done
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View Answer play_arrow
question_answer 127) Which are the longest cells in the body of man?
A)
Muscle cells of legs
done
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B)
Bone cells
done
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C)
Nerve cells
done
clear
D)
None of the above
done
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View Answer play_arrow
question_answer 128) CO is more toxic than \[C{{O}_{2}}\]because
A)
it affects the nervous system
done
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B)
it damages lungs
done
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C)
it reduces the oxygen carrying capacity of haemoglobin
done
clear
D)
it forms acid with water
done
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View Answer play_arrow
question_answer 129) Leprosy is also called as
A)
Hansen's disease
done
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B)
sarcoma
done
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C)
slim disease
done
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D)
leukemia
done
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View Answer play_arrow
question_answer 130) Which of the following is not a character of Chordata?
A)
Dorsal tubular nerve cord
done
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B)
Pharyngeal gill slits
done
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C)
Presence of notochord
done
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D)
Presence of spinal cord
done
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View Answer play_arrow
question_answer 131) Vitamin essential for proper functioning of liver and clotting of blood is
A)
vitamin-K
done
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B)
vitamin-A
done
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C)
vitamin-E
done
clear
D)
vitamin-\[{{\text{B}}_{\text{12}}}\]
done
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View Answer play_arrow
question_answer 132) Cancer causing genes (oncogenes) were discovered by
A)
Watson and Crick
done
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B)
Beadle and Tatum
done
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C)
Bishop and Varamus
done
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D)
Temin and Baltimore
done
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View Answer play_arrow
question_answer 133) Beak is toothed in
A)
pelican
done
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B)
kiwi
done
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C)
ostrich
done
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D)
Archaeopteryx
done
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View Answer play_arrow
question_answer 134) The sliding filament theory of muscle contraction was proposed by
A)
A.F. Huxley and A.P. Pullman
done
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B)
A.F. Huxley and H.E. Huxley
done
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C)
B. Pullman and A.P. Huxley
done
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D)
A. Pullman and E. Pullman
done
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View Answer play_arrow
question_answer 135) Which one is uricotelic ?
A)
Frog and toads
done
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B)
Lizards and birds /cockroach
done
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C)
Cattle, monkey and man
done
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D)
Molluscs and teleost fishes
done
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View Answer play_arrow
question_answer 136) Interacting populations are
A)
symbiotic
done
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B)
mutualistic
done
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C)
parasitic
done
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D)
coevolved
done
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View Answer play_arrow
question_answer 137) salamandra atra is
A)
ovoviviparous
done
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B)
oviparous
done
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C)
sexually sterile
done
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D)
parthenogenetic
done
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View Answer play_arrow
question_answer 138) Flying fish is
A)
Torpedo
done
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B)
Scoliodon
done
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C)
Anguilla
done
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D)
Exocoetus
done
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View Answer play_arrow
question_answer 139) Tay Sach's disease is due to
A)
sex linked recessive gene
done
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B)
sex linked dominant gene
done
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C)
autosomal dominant gene
done
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D)
autosomal recessive gene
done
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View Answer play_arrow
question_answer 140) The earliest fossil form in phylogeny of horse is
A)
Merychippus
done
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B)
Mesohtppus
done
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C)
Eohippus
done
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D)
Equus
done
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View Answer play_arrow
question_answer 141) What is true about vein ?
A)
All veins carry deoxygenated blood
done
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B)
All veins cany oxygenated blood
done
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C)
They carry blood from organs towards hean
done
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D)
They carry blood from heart towards organs
done
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View Answer play_arrow
question_answer 142) Autosomes in humans are
A)
11 pairs
done
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B)
22 pairs
done
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C)
23 pairs
done
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D)
43 pairs
done
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View Answer play_arrow
question_answer 143) Haeckel's biogenetic law or recapitulation theory states that
A)
life history of an animal reflects evolutionary history of the same
done
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B)
progeny resembles parents
done
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C)
mutations are acquired characters
done
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D)
all organisms begin their life from zygote
done
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View Answer play_arrow
question_answer 144) A colour blind mother and normal father would have
A)
colour blind sons and normal/carrier daughters
done
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B)
colour blind sons and daughters
done
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C)
all colour blind
done
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D)
all normal
done
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View Answer play_arrow
question_answer 145) Cranial capacity of modem man is
A)
450-650 cc
done
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B)
600-1000 cc
done
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C)
900-1100 cc
done
clear
D)
1200-1600 cc
done
clear
View Answer play_arrow
question_answer 146) Inheritance of ABO blood groups illustrates
A)
polyploidy
done
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B)
multiple allelism
done
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C)
euploidy
done
clear
D)
dominance
done
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View Answer play_arrow
question_answer 147) The most primitive cell like chemical aggregates capable of growth and division were
A)
chemoautotrophs
done
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B)
eobionts
done
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C)
prokaryotes
done
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D)
microspheres
done
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question_answer 148) Name the ship on which Darwin got opportunity for a voyage of world.
A)
Titanic
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B)
Vikrant
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C)
Vectoria
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D)
Beagle
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question_answer 149) Which of the following are most abundant types of antibodies ?
A)
\[{{\text{I}}_{\text{g}}}\text{A}\]
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B)
\[{{\text{I}}_{\text{g}}}\text{E}\]
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C)
\[{{\text{I}}_{\text{g}}}\text{G}\]
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D)
\[{{\text{I}}_{\text{g}}}\text{M}\]
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question_answer 150) Acromegaly is due to hyper secretion of
A)
thyroxin
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B)
prolactin
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C)
insulin
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D)
growth hormone
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question_answer 151) Ruminate endosperm occurs in
A)
Annonaceae/Areca nut
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B)
Compositae
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C)
Cruciferae
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D)
Euphorbiaceae
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question_answer 152) The edible part of apple/pear is
A)
cotyledons
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B)
thalamus/receptacle
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C)
mesocarp
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D)
endocarp
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question_answer 153) In synapsis two homologous chromosomes are connected at
A)
centromeres
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B)
chromomeres
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C)
telomeres
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D)
none of these
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question_answer 154) Stages in proper sequence of prophase-I are
A)
zygotene, leptotene, pachytene, diakinesis
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B)
leptotene, zygotene, pachyiene, diplotene and diakinesis
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C)
leptotene, pachyiene, zygotene, diakinesis and diplotene
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D)
diplotene, diakinesis, pachytene, zygotene and leptotene
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question_answer 155) Plasmid is
A)
small extrachromosomal circular self replicating DNA that can carry genes into host organism
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B)
bacteriophage
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C)
DNA found in mitochondria
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D)
DNA incorporated in bacterial chromosome
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question_answer 156) A group of plants or animals with similar traits of any rank is
A)
species
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B)
genus
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C)
order
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D)
taxon
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question_answer 157) Fermentation products of yeast are
A)
\[{{H}_{2}}O+C{{O}_{2}}\]
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B)
Methyl alcohol \[+C{{O}_{2}}\]
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C)
Methyl alcohol + Water
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D)
Ethyl alcohol \[+C{{O}_{2}}\]
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question_answer 158) Grafting is not possible in monocots because they
A)
lack cambium
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B)
have scattered vascular bundles
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C)
have parallel venation
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D)
are herbaceous
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question_answer 159) What is true about a gamo spermous apospory?
A)
Formation of embryo from egg of embryo sac proliferated from a nucellar cell
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B)
Formation of embryo from egg of embryo sac formed directly from megaspore mother cell
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C)
Formation of embryo directly from nucellus
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D)
Formation of embryo directly from integument
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question_answer 160) RQ for fatty substance/fat is
A)
unity
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B)
less than one
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C)
more than one
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D)
zero
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question_answer 161) Seed which are able to withstand reduction in moisture and temperature are called
A)
dormant seeds
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B)
recalcitrant seeds
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C)
orthodox seeds
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D)
non-viable seeds
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question_answer 162) Enzyme required for transcription is
A)
RNAse
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B)
Endonuclease
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C)
RNA polymerase
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D)
DNA polymerase
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question_answer 163) The synthetic hormone used as a weedicide is
A)
Indole 3-acetic acid
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B)
gibberellic acid
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C)
2-4 dichlorophenoxyacetic acid
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D)
maleic hydrazide
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question_answer 164) Which is present in monocot flowers ?
A)
Sepals
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B)
Petals
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C)
Tepals
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D)
None of these
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question_answer 165) Anthesis means
A)
growth of pollen tube inside the carpel
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B)
dehiscence of anthers
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C)
opening of floral bud
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D)
emergence of anthers
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question_answer 166) Which one of the following contain agranal chloropiasts ?
A)
\[{{C}_{3}}\]plants
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B)
Succulants
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C)
C4 plants
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D)
Hydrophytes
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question_answer 167) The process of multiplication of DNA from DNA is known as
A)
replication
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B)
transversion
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C)
transcription
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D)
translation
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question_answer 168) Phycobilins absorb light of wavelength
A)
670-700 nm
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B)
610-650 nm
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C)
500-650 nm
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D)
420-520 nm
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question_answer 169) For synthesis of one hexose sugar, how many times Calvin cycle is turned ?
A)
12
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B)
2
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C)
6
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D)
3
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question_answer 170) The number of chlorophyll molecules in a quantasomc is
A)
50-100
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B)
200-250
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C)
300-400
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D)
500-600
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question_answer 171) A plant having seeds but lacking flowers and fruits belong to
A)
pteridophytes
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B)
mosses
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C)
ferns
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D)
gymnosperms
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question_answer 172) Transpiration differ from evaporation in
A)
rate of water loss
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B)
transpiration is a physiological process whereas evaporation is physical process
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C)
transpiration is a physical process while evaporation is physiological process
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D)
frequency of water loss
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question_answer 173) Pigments common to all algae are
A)
chlorophyll-a and phycobilins
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B)
chlorophyll-a and carotenoids
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C)
chlorophyll-a and chlorophyll-b
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D)
chlorophyll-b and carotenoids
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question_answer 174) An antitranspirant is
A)
cobalt chloride
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B)
mercury
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C)
potassium
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D)
phenyl mercuric acetate
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question_answer 175) Crossing over in diploid organisms is responsible for
A)
dominance of genes
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B)
linkage between genes
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C)
recombination of linked genes
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D)
segregation of alleles
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question_answer 176) Active \[{{K}^{+}}\]exchange mechanism for opening and closing of stomata was given by
A)
Darwin
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B)
Levit
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C)
Scarth
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D)
Khorana
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question_answer 177) First geneticist, father of genetics was
A)
de Vries
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B)
Mendel
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C)
Darwin
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D)
Morgan
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question_answer 178) Quiescent centre is found in root apex and acts as
A)
permanent source of active initiates
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B)
reservoir of resistant cells
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C)
reservoir of passive cells to form new root apex if root apex is damaged/killed
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D)
all of the above
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question_answer 179) Which type of meristems allow the fallen stem of cereals/grasses to become erect?
A)
Apical meristem
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B)
Lateral meristem
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C)
Intercalary meristem
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D)
Secondary meristem
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question_answer 180) A simple technology has been developed in India for plant breeders and fanners to use two plants as biofertilizers for growing rice. These are
A)
Azotobacter and Rhizobium
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B)
Chlorella and Spirulina
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C)
Azolla and nitrogen fixing blue-green algae
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D)
Riccia and Marc/ianria
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