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question_answer1) If a unit vector is represented by \[0.5\hat{i}+0.8\hat{j}+c\hat{k}\] the value of c is:
A)
1
done
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B)
\[\sqrt{0.11}\]
done
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C)
\[\sqrt{0.01}\]
done
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D)
0.39
done
clear
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question_answer2) A person swims in a river aiming to reach exactly opposite point on the bank of a river. His speed of swimming is 0.5 m/s at an angle \[{{120}^{\text{o}}}\] with the direction of flow of water. The speed of water in stream is:
A)
1.0 m/s
done
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B)
0.5 m/s
done
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C)
0.25 m/s
done
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D)
0.43 m/s
done
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question_answer3) The escape velocity of a sphere of mass m is given by (G = universal gravitational constant, \[{{M}_{e}}=\] mass of earth and \[{{R}_{e}}=\] radius of earth):
A)
\[\sqrt{\frac{G{{M}_{e}}}{{{R}_{e}}}}\]
done
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B)
\[\sqrt{\frac{2\,G{{M}_{e}}}{{{R}_{e}}}}\]
done
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C)
\[\sqrt{\frac{2\,Gm}{{{R}_{e}}}}\]
done
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D)
\[\frac{G{{M}_{e}}}{R_{e}^{2}}\]
done
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question_answer4) A 500 kg car takes a round turn of radius 50 m with a velocity of 36 km/h. The centripetal force is:
A)
250 N
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B)
750 N
done
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C)
1000 N
done
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D)
1200 N
done
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question_answer5) The moment of inertia of a disc of mass M and radius R about a tangent to its rim in its plane is:
A)
\[\frac{2}{3}M{{R}^{2}}\]
done
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B)
\[\frac{3}{2}M{{R}^{2}}\]
done
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C)
\[\frac{4}{5}M{{R}^{2}}\]
done
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D)
\[\frac{5}{4}M{{R}^{2}}\]
done
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question_answer6) The dimensional formula for magnetic flux is:
A)
\[[M{{L}^{2}}{{T}^{-2}}{{A}^{-1}}]\]
done
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B)
\[[M{{L}^{3}}{{T}^{-2}}{{A}^{-2}}]\]
done
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C)
\[[{{M}^{0}}{{L}^{-2}}{{T}^{2}}{{A}^{-2}}]\]
done
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D)
\[[M{{L}^{2}}{{T}^{-2}}{{A}^{2}}]\]
done
clear
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question_answer7) Two racing cars of masses m1 and m2 are moving in circles of radii \[{{r}_{1}}\] and \[{{r}_{2}}\] respectively. Their speeds are such that each makes a complete circle in the same time t. The ratio of the angular speeds of the first to the second car is:
A)
1 : 1
done
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B)
\[{{m}_{1}}:{{m}_{2}}\]
done
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C)
\[{{r}_{1}}:{{r}_{2}}\]
done
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D)
\[{{m}_{1}}:{{m}_{2}}:{{r}_{1}}{{r}_{2}}\]
done
clear
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question_answer8) What is the linear velocity if angular velocity vector \[\vec{\omega }=3\hat{i}-4\hat{j}+\hat{k}\] and position vector \[\vec{r}=5\hat{i}-6\hat{j}+6\hat{k}\,?\]
A)
\[6\hat{i}+2\hat{j}-3\hat{k}\]
done
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B)
\[-18\hat{i}-13\hat{j}+2\hat{k}\]
done
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C)
\[18\hat{i}+13\hat{j}-2\hat{k}\]
done
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D)
\[6\hat{i}-2\hat{j}+8\hat{k}\]
done
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question_answer9) The force on a rocket moving with a velocity 300 m/s is 210 N. The rate of consumption of fuel of rocket is:
A)
0.7 kg/s
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B)
1.4 kg/s
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C)
0.07 kg/s
done
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D)
10.7 kg/s
done
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question_answer10) Two bodies with kinetic energies in the ratio 4 : 1 are moving with equal linear momentum. The ratio of their masses is:
A)
1 : 2
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B)
1 : 1
done
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C)
4 : 1
done
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D)
1 : 4
done
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question_answer11) The time period of a simple pendulum is 2 s. If its length is increased by 4 times, then its period becomes:
A)
16 s
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B)
12 s
done
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C)
8 s
done
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D)
4 s
done
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question_answer12) Three identical metal balls each of radius r are placed touching each other on a horizontal surface such that an equilateral triangle is formed with centres of three balls joined. The centre of mass of the system is located at:
A)
horizontal surface
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B)
centre of one of the balls
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C)
line joining the centres of any two balls
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D)
point of intersection of the medians
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question_answer13) If 1 g of steam is mixed with 1 g of ice, then the resultant temperature of the mixture is:
A)
\[{{270}^{\text{o}}}C\]
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B)
\[{{230}^{\text{o}}}C\]
done
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C)
\[{{100}^{\text{o}}}C\]
done
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D)
\[{{50}^{\text{o}}}C\]
done
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question_answer14) The coefficients of linear expansions of brass and steel are \[{{\alpha }_{1}}\] and \[{{\alpha }_{2}}\] respectively. When we take a brass rod of length \[{{l}_{1}}\] and a steel rod of length \[{{l}_{2}}\] at \[{{0}^{\text{o}}}C\], then the difference in their lengths \[({{l}_{2}}-{{l}_{1}})\]will remain the same at all temperatures if:
A)
\[{{\alpha }_{1}}{{l}_{1}}={{\alpha }_{2}}{{l}_{2}}\]
done
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B)
\[{{\alpha }_{1}}{{l}_{2}}={{\alpha }_{2}}{{l}_{1}}\]
done
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C)
\[\alpha _{1}^{2}{{l}_{2}}=\alpha _{2}^{2}{{l}_{1}}\]
done
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D)
\[{{\alpha }_{1}}l_{2}^{2}={{\alpha }_{2}}l_{1}^{2}\]
done
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question_answer15) An ideal gas at \[{{27}^{\text{o}}}C\] is compressed adiabattcally to \[\frac{8}{27}\]of its original volume. The rise in temperature is \[\left( \gamma =\frac{5}{3} \right)\]
A)
\[{{475}^{\text{o}}}C\]
done
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B)
\[{{402}^{\text{o}}}C\]
done
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C)
\[{{275}^{\text{o}}}C\]
done
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D)
\[{{375}^{\text{o}}}C\]
done
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question_answer16) The degrees of freedom of a molecule of a diatomic gas are:
A)
2
done
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B)
4
done
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C)
6
done
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D)
8
done
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question_answer17) Ozone layer blocks the radiations of wave length:
A)
less than \[3\times {{10}^{-7}}\,m\]
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B)
equal to \[3\times {{10}^{-7}}\,m\]
done
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C)
more than \[3\times {{10}^{-7}}\,m\]
done
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D)
all of the above
done
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question_answer18) Two waves of wavelength 50 cm and 51 cm produce 12 beats/s. The speed of sound is:
A)
306 m/s
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B)
331 m/s
done
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C)
340 m/s
done
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D)
360 m/s
done
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question_answer19) When air is replaced by a dielectric medium of constant K, the maximum force of attraction between two charges, separated by a distance:
A)
decreases K times
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B)
increase K times
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C)
remains unchanged
done
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D)
becomes \[\frac{1}{{{K}^{2}}}\] times
done
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question_answer20) In bringing an electron towards another electron, the electrostatic potential energy of the system:
A)
decreases
done
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B)
increases
done
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C)
remains same
done
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D)
becomes zero
done
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question_answer21) A parallel plate condenser with oil (dielectric constant 2) between the plates has capacitance C. If oil is removed, the capacitance of capacitor becomes:
A)
\[\sqrt{2}\,C\]
done
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B)
2C
done
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C)
\[\frac{C}{\sqrt{2}}\]
done
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D)
\[\frac{C}{2}\]
done
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question_answer22)
The effective capacitance between points X and y of figure shown is: 
A)
\[6\,\mu F\]
done
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B)
\[12\,\mu F\]
done
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C)
\[18\,\mu F\]
done
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D)
\[24\,\mu F\]
done
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question_answer23)
The current \[(l)\] in the given circuit is: 
A)
1.6 A
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B)
2 A
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C)
0.32 A
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D)
3.2 A
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question_answer24) The resistance of a discharge tube is:
A)
zero
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B)
ohmic
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C)
non-ohmic
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D)
infinity
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question_answer25) In metre-bridge the balancing length from left is found to be 20 cm when standard resistance of \[1\Omega \] is in right gap. The value of unknown resistance is:
A)
\[0.25\,\,\Omega \]
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B)
\[0.4\,\,\Omega \]
done
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C)
\[0.5\,\,\Omega \]
done
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D)
\[4\,\,\Omega \]
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question_answer26) A potentiometer consists of a wire of length 4m and resistance \[10\,\,\Omega \]. It is connected to a cell of emf 2V. The potential gradient of wire is:
A)
0.5 V/m
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B)
2 V/m
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C)
5 V/m
done
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D)
10 V/m
done
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question_answer27) Colours of thin soap bubbles are due to:
A)
refraction
done
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B)
dispersion
done
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C)
interference
done
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D)
diffraction
done
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question_answer28) A plano-convex lens is made of material of refractive index 1.6. The radius of curvature of the curved surface is 60 cm. The focal length of the lens is:
A)
50 cm
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B)
100 cm
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C)
200 cm
done
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D)
400 cm
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question_answer29) The refractive index of the material of the prism is \[\sqrt{3}\], then the angle of minimum deviation of the prism is:
A)
\[{{30}^{\text{o}}}\]
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B)
\[{{45}^{\text{o}}}\]
done
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C)
\[{{60}^{\text{o}}}\]
done
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D)
\[{{75}^{\text{o}}}\]
done
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question_answer30) The wavelength of light of frequency 100 Hz is:
A)
\[2\times {{10}^{6}}m\]
done
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B)
\[3\times {{10}^{6}}m\]
done
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C)
\[4\times {{10}^{6}}m\]
done
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D)
\[5\times {{10}^{6}}m\]
done
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question_answer31) The photoelectric work function for a metal surface is 4.125 eV. The cut-off wavelength for this surface is:
A)
\[4125\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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B)
\[3000\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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C)
\[6000\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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D)
\[2062.5\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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question_answer32) When intensity of incident light increases:
A)
photo-current increases
done
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B)
photo-current decreases
done
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C)
kinetic energy of emitted photoelectrons increases
done
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D)
kinetic energy of emitted photoelectrons decreases
done
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question_answer33) If a long hollow copper pipe carries a current, then magnetic field is produced:
A)
inside the pipe only
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B)
outside the pipe only
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C)
both inside and outside the pipe
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D)
no where
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question_answer34) A straight wire of diameter 0.5 mm carrying a current of 1A is replaced by another wire of diameter 1 mm carrying the same current. The strength of magnetic field far away is:
A)
twice the earlier value
done
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B)
one-half of the earlier value
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C)
one quarter of the earlier value
done
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D)
same as earlier value
done
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question_answer35) Magnetic field due to 0.1 A current flowing through a circular coil of radius 0.1m and 1000 turns at the centre of the coil is:
A)
0.2 T
done
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B)
\[2\times {{10}^{-4}}T\]
done
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C)
\[6.28\times {{10}^{-4}}T\]
done
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D)
\[9.8\times {{10}^{-4}}T\]
done
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question_answer36) A diamagnetic substance is brought near a strong magnet, then it is:
A)
attracted by a magnet
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B)
repelled by a magnet
done
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C)
repelled by north pole and attracted by south pole
done
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D)
attracted by north pole and repelled by south pole
done
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question_answer37) A bar magnet of magnetic moment \[\vec{M}\] is placed in a magnetic field of induction \[\vec{B}\]. The torque exerted on it is:
A)
\[\vec{M}\,\vec{B}\]
done
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B)
\[-\vec{M}\,\vec{B}\]
done
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C)
\[\vec{M}\times \,\vec{B}\]
done
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D)
\[-\vec{M}\times \,\vec{B}\]
done
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question_answer38) The internal resistance of a cell of emf 2 V is \[0.1\,\,\Omega \]. It is connected to a resistance of \[3.9\,\,\Omega \]. The voltage across the cell will be:
A)
0.5 V
done
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B)
1.9 V
done
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C)
1.95 V
done
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D)
2 V
done
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question_answer39) The electromagnetic radiations are caused by:
A)
a stationary charge
done
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B)
uniformly moving charges
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C)
accelerated charges
done
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D)
all of the above
done
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question_answer40)
In a circuit inductance L and capacitance C are connected as shown in figure. \[{{A}_{1}}\] and \[{{A}_{2}}\] are ammeters. When key K. is pressed to complete the circuit, then just after closing key (K), the reading of current will be: 
A)
zero in both \[{{A}_{1}}\] and \[{{A}_{2}}\]
done
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B)
maximum in both \[{{A}_{1}}\] and \[{{A}_{2}}\]
done
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C)
zero in \[{{A}_{1}}\] and maximum in \[{{A}_{2}}\]
done
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D)
maximum in \[{{A}_{1}}\] and zero in \[{{A}_{2}}\]
done
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question_answer41) Which of the following when added as an impurity into silicon produces n-type semiconductor?
A)
P
done
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B)
Al
done
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C)
B
done
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D)
Mg
done
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question_answer42) In a junction diode, the holes are due to:
A)
protons
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B)
extra electrons
done
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C)
neutrons
done
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D)
missing electrons
done
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question_answer43) Depletion layer consists of:
A)
electrons
done
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B)
protons
done
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C)
mobile charge carriers
done
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D)
immobile ions
done
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question_answer44) Alpha particles are:
A)
2 free protons
done
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B)
helium atoms
done
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C)
singly ionised helium atoms
done
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D)
doubly ionised helium atoms
done
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question_answer45) In forward bias the width of depletion layer in a p-n junction diode:
A)
increases
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B)
decreases
done
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C)
remains constant
done
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D)
first increases then decreases
done
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question_answer46) When a proton is accelerated through 1V its kinetic energy will be:
A)
1540 eV
done
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B)
13.6 eV
done
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C)
1 eV
done
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D)
zero
done
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question_answer47) In p-type semiconductor, the major charge carriers are:
A)
holes
done
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B)
electrons
done
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C)
protons
done
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D)
neutrons
done
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question_answer48) In one a and 2\[\beta \]-emissions:
A)
mass number reduces by 2
done
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B)
mass number reduces by 6
done
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C)
atomic number reduces by 2
done
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D)
atomic number remains unchanged
done
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question_answer49) Sodium has body centred packing. If the distance between two nearest atoms is \[\text{3}\text{.7}\overset{\text{o}}{\mathop{\text{A}}}\,\] then the lattice parameter is:
A)
3.3 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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B)
3.9 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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C)
4.3 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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D)
4.8 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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question_answer50)
The following circuit represents: 
A)
OR gate
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B)
XOR gate
done
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C)
AND gate
done
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D)
NAND gate
done
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question_answer51) Which of the following configuration is correct for iron?
A)
\[1{{s}^{2}},\text{ }2{{s}^{2}}2{{p}^{6}},\text{ }3{{s}^{2}}3{{p}^{6}}3{{d}^{5}}\]
done
clear
B)
\[1{{s}^{2}},\text{ }2{{s}^{2}}2{{p}^{6}},\text{ }3{{s}^{2}}3{{p}^{6}},\text{ }4{{s}^{2}}3{{d}^{5}}\]
done
clear
C)
\[1{{s}^{2}},\text{ }2{{s}^{2}}2{{p}^{6}},\text{ }3{{s}^{2}}3{{p}^{6}},\text{ }4{{s}^{2}}3{{d}^{7}}\]
done
clear
D)
\[1{{s}^{2}},\text{ }2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}},\text{ }3{{d}^{6}},4{{s}^{2}}\]
done
clear
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question_answer52) Which of the following has more unpaired d-electrons?
A)
\[Z{{n}^{+}}\]
done
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B)
\[F{{e}^{2+}}\]
done
clear
C)
\[{{N}^{3+}}\]
done
clear
D)
\[C{{u}^{+}}\]
done
clear
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question_answer53) Oxidation state of Fe in \[F{{e}_{3}}{{O}_{4}}\] is:
A)
\[\frac{3}{2}\]
done
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B)
\[\frac{4}{5}\]
done
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C)
\[\frac{5}{4}\]
done
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D)
\[\frac{8}{3}\]
done
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question_answer54) If 0.15 g of solute, dissolved in 15 g of solvent, is boiled at a temperature higher by \[{{0.216}^{\text{o}}}C,\] than that of the pure solvent, the molecular weight of the substance is (molal elevation constant for the solvent is \[{{2.16}^{\text{o}}}C\]):
A)
1.01
done
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B)
10
done
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C)
10.1
done
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D)
100
done
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question_answer55) How many gram of dibasic acid (mol. wt. 200) should be present in 100 mL of the aqueous solution to give 0.1 N?
A)
1 g
done
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B)
2 g
done
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C)
10 g
done
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D)
20 g
done
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question_answer56) At \[{{25}^{\text{o}}}C\] and 730 mm pressure, 380 mL of dry oxygen was collected. If the temperature is constant, what volume will the oxygen occupy at 760 mm pressure?
A)
365 mL
done
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B)
2 g
done
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C)
10 g
done
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D)
20 g
done
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question_answer57) For a first-order reaction, the half-life period is independent of:
A)
initial concentration
done
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B)
cube root of initial concentration
done
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C)
first power of final concentration
done
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D)
square root of final concentration
done
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question_answer58) The uncertainty in momentum of an electron is \[1\times {{10}^{-5}}\,m/s\]. The uncertainty in its position will be\[(h=6.62\times {{10}^{-34}}\,kg\,{{m}^{2}}/s)\]:
A)
\[1.05\times {{10}^{-28}}\,m\]
done
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B)
\[1.05\times {{10}^{-26}}\,m\]
done
clear
C)
\[5.27\times {{10}^{-30}}\,m\]
done
clear
D)
\[5.25\times {{10}^{-28}}\,m\]
done
clear
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question_answer59) Who modified Bohr's theory by introducing elliptical orbits for electron path?
A)
Hund
done
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B)
Thomson
done
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C)
Rutherford
done
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D)
Sommerfeld
done
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question_answer60) The de-Broglie wavelength of a particle with mass 1 g and velocity 100 m/s is:
A)
\[6.63\times {{10}^{-33}}\,m\]
done
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B)
\[6.63\times {{10}^{-34}}\,m\]
done
clear
C)
\[6.63\times {{10}^{-35}}\,m\]
done
clear
D)
\[6.65\times {{10}^{-36}}\,m\]
done
clear
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question_answer61) The concentration of \[[{{H}^{+}}]\] and concentration of \[[O{{H}^{-}}]\] of a 0.1 M aqueous solution of 2% ionised weak monobasic acid is: [ionic product of water \[=1\times {{10}^{-14}}\]]
A)
\[0.02\times {{10}^{-3}}\,M\] and \[5\times {{10}^{-11}}\,M\]
done
clear
B)
\[1\times {{10}^{-3}}\,M\] and \[3\times {{10}^{-11}}\,M\]
done
clear
C)
\[2\times {{10}^{-3}}\,M\] and \[5\times {{10}^{-12}}\,M\]
done
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D)
\[3\times {{10}^{-2}}\,M\] and \[4\times {{10}^{-13}}\,M\]
done
clear
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question_answer62) The strongest conjugate base is:
A)
\[NO_{3}^{-}\]
done
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B)
\[C{{l}^{-}}\]
done
clear
C)
\[SO_{4}^{2-}\]
done
clear
D)
\[C{{H}_{3}}CO{{O}^{-}}\]
done
clear
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question_answer63) The specific conductance of a 0.1 N KCl solution at \[{{23}^{\text{o}}}C\] is \[0.012\,\,oh{{m}^{-1}}\,c{{m}^{-1}}\]. The resistance of cell containing the solution at the same temperature was found to be 55 ohm. The cell constant will be:
A)
\[0.142\,c{{m}^{-1}}\]
done
clear
B)
\[0.66\,c{{m}^{-1}}\]
done
clear
C)
\[0.918\,\,c{{m}^{-1}}\]
done
clear
D)
\[1.12\,c{{m}^{-1}}\]
done
clear
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question_answer64) Which of the following is most acidic?
A)
\[{{N}_{2}}{{O}_{5}}\]
done
clear
B)
\[{{P}_{2}}{{O}_{5}}\]
done
clear
C)
\[A{{s}_{2}}{{O}_{5}}\]
done
clear
D)
\[S{{b}_{2}}{{O}_{5}}\]
done
clear
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question_answer65) The structure of \[{{H}_{2}}{{O}_{2}}\] is:
A)
planar
done
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B)
non-planar
done
clear
C)
spherical
done
clear
D)
linear
done
clear
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question_answer66) Which one of the following statements is wrong for gases?
A)
Gases do not have a definite shape and volume
done
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B)
Volume of the gas is equal to volume of container confining the gas
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C)
Confirmed gas exerts uniform pressure on the walls of its container in all directions
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D)
Mass of gas cannot be determined by weighing a container in which it is enclosed
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question_answer67) In an endothermic reaction, the value of \[\Delta H\] is:
A)
zero
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B)
positive
done
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C)
negative
done
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D)
constant
done
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question_answer68) In the reaction \[S(s)+\frac{3}{2}{{O}_{2}}(g)\xrightarrow{{}}S{{O}_{3}}(g)+2x\,kcal\] and \[S{{O}_{2}}(g)+\frac{1}{2}{{O}_{2}}(g)\xrightarrow{{}}S{{O}_{3}}(s)+y\,kcal\] the heat of formation of \[S{{O}_{2}}\] is:
A)
\[(x+y)\]
done
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B)
\[(x-y)\]
done
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C)
\[(2x+y)\]
done
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D)
\[(2x-y)\]
done
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question_answer69) Which of the following elements has maximum electron affinity?
A)
CI
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B)
Br
done
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C)
I
done
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D)
F
done
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question_answer70) The most suitable method of the separation of a mixture of ortho and para-nitrophenol mixed in the ratio of 1 : 1 is:
A)
distillation
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B)
crystallization
done
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C)
vaporisation
done
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D)
colour spectrum
done
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question_answer71) Sulphur = 35 (34.96903 amu) emits a \[\beta \]-particle but no \[\gamma \]-ray. The product is chlorine = 35 (34.96885 amu). The maximum energy emitted by the alpha-particle is:
A)
16.758 MeV
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B)
1.6758 MeV
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C)
0.16758 MeV
done
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D)
0.016758 MeV
done
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question_answer72) The type of hybridisation of boron in diborane is:
A)
sp-hybridisation
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B)
\[s{{p}^{2}}\]-hybridisation
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C)
\[s{{p}^{3}}\]-hybridisation
done
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D)
\[s{{p}^{3}}{{d}^{2}}\]-hybridisation
done
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question_answer73) Purification of aluminium, by electrolyte refining, is known as:
A)
Hall's process
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B)
Baeyer's process
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C)
Hoope's process
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D)
Serpeck's process
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question_answer74) Bell-metal is an alloy of:
A)
Cu + Pb
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B)
Cu + Sn
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C)
Cu + Zn
done
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D)
Cu + Ni
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question_answer75) Which of the following does not show electrical conduction?
A)
Potassium
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B)
Graphite
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C)
Diamond
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D)
Sodium
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question_answer76) Which of the following phosphorus, is the most reactive?
A)
Red phosphorus
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B)
White phosphorus
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C)
Scarlet phosphorus
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D)
Violet phosphorus
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question_answer77) Cassiterite is an ore of:
A)
Mn
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B)
Ni
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C)
Sb
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D)
Sn
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question_answer78) Which of the following is used in the preparation of chlorine?
A)
Only \[Mn{{O}_{2}}\]
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B)
Only \[KMn{{O}_{4}}\]
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C)
Both \[Mn{{O}_{2}}\] and \[KMn{{O}_{4}}\]
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D)
Either \[Mn{{O}_{2}}\] and \[KMn{{O}_{4}}\]
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question_answer79) Percentage of lead in lead pencil is:
A)
zero
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B)
20
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C)
80
done
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D)
70
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question_answer80) In which of the following compounds transition metal has zero oxidation state?
A)
\[[Fe{{(CO)}_{5}}]\]
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B)
\[N{{H}_{2}}.N{{H}_{2}}\]
done
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C)
\[NOCl{{O}_{4}}\]
done
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D)
\[Cr{{O}_{5}}\]
done
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question_answer81) When acetylene is passed through dil. \[{{H}_{2}}S{{O}_{4}}\] in presence of \[HgS{{O}_{4}}\], the compound formed is:
A)
ether
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B)
ketone
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C)
acetic acid
done
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D)
acetaldehyde
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question_answer82) The solubility of a saturated solution of calcium fluoride is \[2\times {{10}^{-4}}\] mol/L. Its solubility product is:
A)
\[12\times {{10}^{-2}}\]
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B)
\[14\times {{10}^{-4}}\]
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C)
\[22\times {{10}^{-11}}\]
done
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D)
\[32\times {{10}^{-12}}\]
done
clear
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question_answer83) The vapour pressure of benzene at a certain temperature is 640 mm. of Hg. A non-volatile and non-electrolyte solid, weighing 2.175 g is added to 39.08 g of benzene. If the vapour pressure of the solution is 600 mm of Hg, what is the molecular weight of solid substance?
A)
49.50
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B)
59.60
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C)
69.40
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D)
79.82
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question_answer84) The number of atoms in 4.25g of \[N{{H}_{3}}\] is approximately:
A)
\[1\times {{10}^{23}}\]
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B)
\[2\times {{10}^{23}}\]
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C)
\[4\times {{10}^{23}}\]
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D)
\[6\times {{10}^{23}}\]
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question_answer85) In the following radioactive decay, \[_{92}{{X}^{232}}\xrightarrow[{}]{{}}{{\,}_{89}}{{Y}^{220}}\], how many \[\alpha \] and \[\beta \] particles are ejected from X to Y?
A)
3\[\alpha \] and 2\[\beta \]
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B)
5\[\alpha \] and 3\[\beta \]
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C)
3\[\alpha \] and 3\[\beta \]
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D)
5\[\alpha \] and 5 \[\beta \]
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question_answer86) The half-life of \[_{6}{{C}^{14}},\] (\[\lambda =2.31\,\times {{10}^{4}}\]per year) is:
A)
\[2\times {{10}^{2}}\] year
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B)
\[3\times {{10}^{3}}\] year
done
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C)
\[3.3\times {{10}^{4}}\] year
done
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D)
\[4\times {{10}^{3}}\] year
done
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question_answer87) Ethyl chloride is converted into diethyl ether by:
A)
Wurtz synthesis
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B)
Grignard reaction
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C)
Perkin's reaction
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D)
Williamson's synthesis
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question_answer88) In the reaction \[C{{H}_{3}}CN+2H\xrightarrow[SnC{{l}_{2}}]{HCl}X\xrightarrow[{}]{\text{Boiling}\,{{H}_{2}}O}Y,\] the term Y is:
A)
acetone
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B)
ethanamine
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C)
acetaldehyde
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D)
dimethyl amine
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question_answer89) An organic compound containing C, H and N gave the following analysis C = 40% H = 13.33% and N = 46.67%. Its empirical formula would be:
A)
CHN
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B)
\[{{C}_{2}}{{H}_{2}}N\]
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C)
\[C{{H}_{4}}N\]
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D)
\[{{C}_{2}}{{H}_{7}}N\]
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question_answer90) In Friedel-Craft's alkylation, besides \[AlC{{l}_{3}}\] the other reactants are:
A)
\[{{C}_{6}}{{H}_{6}}+N{{H}_{2}}\]
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B)
\[{{C}_{6}}{{H}_{6}}+C{{H}_{4}}\]
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C)
\[{{C}_{6}}{{H}_{6}}+C{{H}_{3}}Cl\]
done
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D)
\[{{C}_{6}}{{H}_{6}}\,+C{{H}_{3}}COCl\]
done
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question_answer91) Phenyl isocyanides are prepared from which of the following reaction?
A)
Rosenmund's reaction
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B)
Carbylamine reaction
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C)
Reimcr-Tiemann reaction
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D)
Wurtz reaction
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question_answer92) The decomposition of organic compounds, in the presence of oxygen and without the development of odoriferous substances, is called:
A)
decay
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B)
\[{{N}_{2}}\]-fixation
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C)
nitrification
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D)
denitrification
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question_answer93) Which of the following is the sweetest sugar?
A)
Sucrose
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B)
Glucose
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C)
Fructose
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D)
Maltose
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question_answer94) Aldol condensation will not take place in:
A)
HCHO
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B)
\[C{{H}_{3}}CHO\]
done
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C)
\[C{{H}_{3}}COC{{H}_{3}}\]
done
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D)
\[C{{H}_{3}}C{{H}_{2}}CHO\]
done
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question_answer95) Gammexane is:
A)
chlorobenzene
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B)
benzyl chloride
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C)
bromobenzene
done
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D)
benzene hexachloride
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question_answer96) Amides can be converted into amines by a reaction named after:
A)
Perkin
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B)
Claisen
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C)
Hofmann
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D)
Kekule
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question_answer97) Which one of the following compounds will react with \[NaHC{{O}_{3}}\] solution to give sodium salt and carbon dioxide?
A)
Acetic acid
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B)
n-hexanol
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C)
Phenol
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D)
Both (b) and (c)
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question_answer98) Which of the following compounds will be more easily attacked by an electrophile?
A)
done
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B)
done
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C)
done
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D)
done
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question_answer99) Terylene is a condensation polymer of ethylene glycol and:
A)
benzoic acid
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B)
phthalic acid
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C)
salicylic acid
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D)
terephthalic acid
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question_answer100) Natural rubber is a polymer of:
A)
butadiene
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B)
ethyne
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C)
styrene
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D)
isoprene
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question_answer101) In soil, water available for plants is:
A)
capillary water
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B)
chemically bound water
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C)
gravitational water
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D)
hygroscopic water
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question_answer102) The plant which bears clinging roots is:
A)
Podostemon
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B)
Orchid
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C)
Trapa
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D)
Screw pine
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question_answer103) Which of the following organisms is likely to have more concentration of DDT in its body?
A)
Primary producers
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B)
Herbivores
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C)
Carnivores
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D)
Top carnivores
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question_answer104) Secretion of progesterone by corpus luteum is initiated by:
A)
thyroxine
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B)
LH
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C)
MSH
done
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D)
testosterone
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question_answer105) The respiratory centres which control inspiration and expiration are located in:
A)
spinal cord
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B)
diencephalon
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C)
cerebellum
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D)
medulla oblongata
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question_answer106) The term aquaculture means:
A)
aspergillosis
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B)
inland fisheries
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C)
marine fisheries
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D)
both (b) and (c)
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question_answer107) The proteins are synthesized at:
A)
ribosomes
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B)
mitochondria
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C)
centrosomes
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D)
Golgi bodies
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question_answer108) Which of the following is the main category of mutation?
A)
Somatic mutation
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B)
Genetic mutation
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C)
Zygotic mutation
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D)
All of the above
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question_answer109) In human beings, multiple genes are involved in the inheritance of:
A)
skin colour
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B)
phenylketonuria
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C)
colour blindness
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D)
sickle cell anaemia
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question_answer110) Ligament is a:
A)
modified yellow elastic fibrous tissue
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B)
inelastic white fibrous tissue
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C)
modified white fibrous tissue
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D)
none of the above
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question_answer111) The middle piece of the sperm contains:
A)
proteins
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B)
centriole
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C)
nucleus
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D)
mitochondria
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question_answer112) In which of the following would you place the plants having vascular tissue lacking seeds?
A)
Gymnosperms
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B)
Algae
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C)
Pteridophytes
done
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D)
Bryophytes
done
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question_answer113) Which of the following has single membrane?
A)
Mitochondria
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B)
Nucleus
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C)
Cell wall
done
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D)
Spherosomes
done
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question_answer114) Sympathetic nervous system induces:
A)
heart-beat
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B)
secretion of digestive juices
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C)
secretion of saliva
done
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D)
all of die above
done
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question_answer115) The book 'Genera Plantarum' was written by:
A)
Hutchinson
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B)
Bessey
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C)
Engler and Prantl
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D)
Bentham and Hooker
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question_answer116) In operon concept, regulator gene functions as:
A)
repressor
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B)
inhibitor
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C)
regulator
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D)
all of these
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question_answer117) Casparian strips are found in:
A)
hypodermis
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B)
endodermis
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C)
periderm
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D)
epidermis
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question_answer118) Fish which eradicate the mosquito larva are:
A)
Cutter fish
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B)
Anabus
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C)
Gambusia
done
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D)
Rohu
done
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question_answer119) A pair of insectivorous plants is:
A)
Venus fly trap and Rafflesia
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B)
Nepenthes and bladderwort
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C)
Drosera and Rafflesia
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D)
Dionaea and Viscum
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question_answer120) A system of classification in which a large number of traits are considered is:
A)
phylogenetic system
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B)
artificial system
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C)
natural system
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D)
synthetic system
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question_answer121) Hybridoma cells are:
A)
product of spore formation in bacteria
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B)
hybrid cells resulting from myeloma cells
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C)
nervous cells of frog
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D)
only cells having oncogenes
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question_answer122) The antherozoids of Funaria are:
A)
monociliated
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B)
biciliated
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C)
multiciliated
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D)
aciliated
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question_answer123) In DNA when AGCT occurs, their association is as per which of the following pair?
A)
AC-GT
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B)
AG-CT
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C)
AT-GC
done
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D)
All of these
done
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question_answer124) In 1984, Bhopal gas tragedy was caused due to the leakage of:
A)
potassium isocyanate
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B)
sodium monoxide
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C)
sodium thiocyanate
done
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D)
methyl isocyanate
done
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question_answer125) An average person not doing hard work requires energy per day about:
A)
2800 kcal
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B)
2000 kcal
done
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C)
1000 kcal
done
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D)
750 kcal
done
clear
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question_answer126) Phenomenon of ?Industrial melanism? demonstrates:
A)
reproductive isolation
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B)
induced mutation
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C)
natural selection
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D)
geographical isolation
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question_answer127) A marriage between normal-visioned man and colourblind woman will produce offspring:
A)
50% colourblind sons and 50% carrier daughters
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B)
colourblind sons and carrier daughters
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C)
normal males and carrier daughters
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D)
colourblind sons and 50% carrier daughters
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question_answer128) The problem due to \[R{{h}^{-}}\] factor arises when the blood of two (\[R{{h}^{+}}\] and \[R{{h}^{-}}\]) mix-up:
A)
during pregnancy
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B)
through transfusion
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C)
in a test tube
done
clear
D)
both (a) and (b)
done
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question_answer129) Active immunity means:
A)
resistance developed after disease
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B)
increasing quantity of blood
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C)
resistance developed before disease
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D)
increasing rate of heart-beat
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question_answer130) Haemophilic man marries a normal woman. Their offspring will be:
A)
all boys haemophilic
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B)
all normal
done
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C)
all girls haemophilic
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D)
all haemophilic
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question_answer131) Which of the following is mismatched?
A)
Vitamin K?beri-beri
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B)
Vitamin D?rickets
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C)
Vitamin C?scurvy
done
clear
D)
Vitamin A?xeropthalmia
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question_answer132) Glucose is carried from digestive tract to liver by:
A)
pulmonary vein
done
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B)
hepatic portal vein
done
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C)
hepatic artery
done
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D)
none of these
done
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question_answer133) The canal system is a characteristic feature of:
A)
echinoderms
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B)
helminthes
done
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C)
coelenterates
done
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D)
sponges
done
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question_answer134) Cholecystokinin and duocrinin are secreted by:
A)
adrenal cortex
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B)
thyroid gland
done
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C)
pancreas
done
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D)
intestine
done
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question_answer135) Tablets to prevent contraception contain:
A)
progesterone
done
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B)
FSH
done
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C)
LH
done
clear
D)
both (b) and (c)
done
clear
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question_answer136) Hybridization between \[Tt\times tt\] gives rise to the progeny of ratio:
A)
1 : 1
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B)
1 : 2 : 1
done
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C)
1 : 2
done
clear
D)
4 : 1
done
clear
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question_answer137) Which part of the world has high density of organisms?
A)
Deciduous forests
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B)
Grasslands
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C)
Savannas
done
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D)
Tropical rain forests
done
clear
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question_answer138) Some of the enzymes, which are associated in converting fats into carbohydrates are present in:
A)
microsomes
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B)
liposomes
done
clear
C)
Golgi bodies
done
clear
D)
glyoxysomes
done
clear
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question_answer139) Photosynthetic bacteria have pigments in:
A)
chromoplasts.
done
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B)
leucoplasts
done
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C)
chloroplasts
done
clear
D)
chromatophore
done
clear
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question_answer140) Dichotomous branching is found in:
A)
Marchantia
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B)
fern
done
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C)
liverworts
done
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D)
Funaria
done
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question_answer141) Edible part of litchi is:
A)
pericarp
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B)
fleshy aril
done
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C)
mesocarp
done
clear
D)
endosperm
done
clear
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question_answer142) Koch's postulates are not applicable to:
A)
Cholera
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B)
Leprosy
done
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C)
TB
done
clear
D)
Diphtheria
done
clear
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question_answer143) The maximum biomagnification would be in which of the following in case of aquatic ecosystem?
A)
Fishes
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B)
Phytoplanktons
done
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C)
Birds
done
clear
D)
Zooplanktons
done
clear
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question_answer144) The joint between atlas and axis is called:
A)
pivot joint
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B)
hinge joint
done
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C)
saddle joint
done
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D)
angular joint
done
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question_answer145) Land mass occupied by forests is about:
A)
60%
done
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B)
30%
done
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C)
22%
done
clear
D)
11%
done
clear
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question_answer146) The process of series of changes from larva to adult, after embryonic development is called:
A)
regeneration
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B)
metamorphosis
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C)
growth
done
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D)
ageing
done
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question_answer147) The Pneumococcits experiment proves that:
A)
DNA is the genetic material
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B)
RNA sometime controls the production of DNA and proteins
done
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C)
bacteria undergo binary fission
done
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D)
bacteria do not reproduce sexually
done
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question_answer148) ABA is involved in:
A)
dormancy of seeds
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B)
increased cell division
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C)
root elongation
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D)
shoot elongation
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question_answer149) DNA is mainly found in:
A)
nucleus only
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B)
cytoplasm only
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C)
nucleus and cytoplasm
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D)
nucleolus
done
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question_answer150) Which of the following is true about bryophytes?
A)
They are thalloid
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B)
They possess archegonia
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C)
They contain chloroplasts
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D)
All of the above
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question_answer151) The eukaryotic genome differs from the prokaryotic genome because:
A)
DNA is complexed with histones in prokaryotes
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B)
repetitive sequences are present in eukaryotes
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C)
genes in the former cases are organised into operons
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D)
DNA is circular and single stranded in prokaryotes
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question_answer152) Carbon dioxide acceptor in \[{{C}_{3}}\]-plants is:
A)
PGA
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B)
RuDP
done
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C)
PEP
done
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D)
none of these
done
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question_answer153) The antibodies are:
A)
germs
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B)
carbohydrates
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C)
proteins
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D)
lipids
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question_answer154) Temperature changes in the environment affect most of the animals which are:
A)
homoeothermic
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B)
aquatic
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C)
poikilothermic
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D)
desert living
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question_answer155) The term ?humulin? is used for:
A)
human insulin
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B)
powerful antibiotic
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C)
isoenzyme
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D)
hydrolytic enzyme
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question_answer156) The gonadotropic hormones are produced in:
A)
interstitial cells of testes
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B)
adrenal cortex
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C)
adenohypophysis of pituitary
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D)
posterior part of thyroid
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question_answer157) Which cranial nerve has the highest number of branches?
A)
Facial nerve
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B)
Trigeminal
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C)
Vagus nerve
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D)
None of these
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question_answer158) Haemoglobin is a type of:
A)
carbohydrate
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B)
vitamin
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C)
skin pigment
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D)
respiratory pigment
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question_answer159) After ovulation, Graafian follicle regresses into:
A)
corpus luteum
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B)
corpus callosum
done
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C)
corpus albicans
done
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D)
corpus artesia
done
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question_answer160) Which is the principal cation in the plasma of the blood?
A)
Magnesium
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B)
Sodium
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C)
Potassium
done
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D)
Calcium
done
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question_answer161) Which of the following is pollution related disorder?
A)
Fluorosis
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B)
Leprosy
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C)
Pneumonicosis
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D)
Silicosis
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question_answer162) Which of the following are homologous organs?
A)
Nails of human being and claws in animals
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B)
Wings of bird and wings of insect
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C)
Wings of bird and hand of human
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D)
Wings of bat and wings of cockroach
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question_answer163) Which of the following is a secondary pollutant?
A)
Aerosol
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B)
CO
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C)
PAN
done
clear
D)
\[C{{O}_{2}}\]
done
clear
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question_answer164) Due to which of the following organism yield of rice has been increased?
A)
Anabaena
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B)
Bacillus polymyxa
done
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C)
Bacillus popilliae
done
clear
D)
Sesbania
done
clear
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question_answer165) Which of the following is regarded as a unit of nervous tissue?
A)
Myelin sheath
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B)
Axons
done
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C)
Dendrites
done
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D)
Neurons
done
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question_answer166) To which of the following family do folic acid and pantothenic acid belong?
A)
Vitamin C
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B)
Vitamin K
done
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C)
Vitamin A
done
clear
D)
Vitamin B complex
done
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question_answer167) Which of the following is mainly responsible for extinction of wild life?
A)
Destruction of habitats
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B)
Pollution of air and water
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C)
Hunting for flesh
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D)
All of the above
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question_answer168) Life-span of a worker bee is:
A)
10 weeks
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B)
10 days
done
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C)
6 weeks
done
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D)
15 days
done
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question_answer169) The junction between the axon of one neuron and the dendrite of the next is called:
A)
junction point
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B)
a synapse
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C)
a joint
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D)
constant bridge
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question_answer170) Which of the following is the use of lichens in case of pollution?
A)
lichens are not related with pollution
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B)
They act as bioindicators of pollution
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C)
They treat the polluted water
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D)
They promote pollution
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question_answer171) Bryophytes comprise:
A)
small sporophyte phase generally parasitic on gametophyte
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B)
sporophyte of longer duration
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C)
dominant phase of gametophyte which produces spores
done
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D)
dominant phase of sporophyte which is parasitic
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question_answer172) Energy transfer from one trophic level to other in a food chain is:
A)
20%
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B)
10%
done
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C)
2%
done
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D)
1%
done
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question_answer173) The rate of photosynthesis is higher in:
A)
red light
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B)
blue light
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C)
green light
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D)
very high light
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question_answer174) The process of replication in plasmid DNA, other than initiation, is controlled by:
A)
mitochondrial gene
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B)
bacterial gene
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C)
plasmid gene
done
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D)
none of the above
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question_answer175) The closing and opening of the leaves of Mimosa pudica is due to:
A)
chemonastic movement
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B)
thermonastic movement
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C)
seismonastic movement
done
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D)
hydrotropic movement
done
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question_answer176) Green house effect refers to:
A)
production of cereals
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B)
cooling of earth
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C)
trapping of UV rays
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D)
warming of earth
done
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question_answer177) Which of the following is related to genetic engineering?
A)
Mutation
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B)
Plasmid
done
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C)
Plastid
done
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D)
Heterosis
done
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question_answer178) The first transgenic crop was:
A)
cotton
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B)
pea
done
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C)
tobacco
done
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D)
flax
done
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question_answer179) The thickening of walls of arteries are called:
A)
arthritis
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B)
atherosclerosis
done
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C)
anaeurysm
done
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D)
both (a) and (c)
done
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question_answer180) Rate of heart-beat is determined by:
A)
Purkinje fibres
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B)
Papillary muscles
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C)
SA node
done
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D)
AV node
done
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question_answer181) The endosperm of gymnosperm is:
A)
polyploid
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B)
haploid
done
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C)
triploid
done
clear
D)
diploid
done
clear
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question_answer182) Angiosperm to which the largest flowers belong is:
A)
partial root parasite
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B)
total stem parasite
done
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C)
total root parasite
done
clear
D)
partial root parasite
done
clear
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question_answer183) DDT is:
A)
a non-degradable pollutant
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B)
an antibiotic
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C)
a biodegradable pollutant
done
clear
D)
not a pollutant
done
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question_answer184) Initiation codon in eukaryotes is:
A)
AUG
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B)
AGU
done
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C)
UAG
done
clear
D)
GAU
done
clear
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question_answer185) Which part of body secretes die hormone secretin?
A)
Oesophagus
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B)
Duodenum
done
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C)
Stomach
done
clear
D)
Ileum
done
clear
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question_answer186) Brunner's glands are present in:
A)
stomach
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B)
duodenum
done
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C)
oesophagus
done
clear
D)
ileum
done
clear
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question_answer187) The Minimata disease in Japan was caused through pollution of water by:
A)
methyl isocyanate
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B)
mercury
done
clear
C)
lead
done
clear
D)
cyanide
done
clear
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question_answer188) The new verieties of plants are produced by:
A)
selection and hybridization
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B)
selection and introduction
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C)
mutation and selection
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D)
introduction and mutation
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question_answer189) The aquatic fern, which is an excellent biofertiliser, is:
A)
Azolla
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B)
Pteridium
done
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C)
Satvinia
done
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D)
Marsilia
done
clear
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question_answer190) Diabetes is due to:
A)
iodine deficiency
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B)
hormonal deficiency
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C)
\[N{{a}^{+}}\] deficiency
done
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D)
enzyme deficiency
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question_answer191) Tendon is made up of:
A)
adipose tissue
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B)
modified white fibrous tissue
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C)
areolar tissue
done
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D)
yellow fibrous connective tissue
done
clear
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question_answer192) The function of oxytocin is to help in:
A)
growth
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B)
lactation
done
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C)
childbirth
done
clear
D)
gametogenesis
done
clear
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question_answer193) Aquatic reptiles are:
A)
ammonotelic
done
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B)
ureotelic
done
clear
C)
ureotelic in water
done
clear
D)
ureotelic over land
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clear
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question_answer194) Which of the following is not found in birds?
A)
Hind-limb
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B)
Pectoral girdle
done
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C)
Pelvic girdle
done
clear
D)
Fore-limb
done
clear
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question_answer195) A gene pair hides the effect of another gene. This phenomenon is called:
A)
epistasis
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B)
segregation
done
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C)
mutation
done
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D)
dominance
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question_answer196) Columella is a specialised structure found in the sporangium of:
A)
Spirogyra
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B)
Rhizopus
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C)
Ulthorix
done
clear
D)
None of these
done
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question_answer197) The type of placentation in which ovary is syncarpous, unilocular and ovules on structures is called:
A)
marginal placentation
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B)
parietal placentation
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C)
axile placentation
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clear
D)
superficial placentation
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clear
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question_answer198) The blood group with antibody-a aid antibody-b is:
A)
B
done
clear
B)
A
done
clear
C)
O
done
clear
D)
AB
done
clear
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question_answer199) Net gain of ATP molecules during aerosol respiration is:
A)
36 molecules
done
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B)
60 molecules
done
clear
C)
38 molecules
done
clear
D)
48 molecules
done
clear
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question_answer200) In prokaryotes, the genetic material is:
A)
linear DNA without histones
done
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B)
linear DNA with histones
done
clear
C)
circular DNA with histones
done
clear
D)
circular DNA without histones
done
clear
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