The change in the value of 'g' at a height 'h' above the surface of the earth is the same as at a depth 'd' below the surface of the earth. When both ?d? and 'h' are much smaller than the radius of earth, then which one of the following relation is correct?
A)
\[d=\frac{3h}{2}\]
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B)
\[d=\frac{h}{2}\]
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C)
\[d=h\]
done
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D)
\[d=2h\]
done
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An electron of a stationary hydrogen atom passes from the fifth energy level to the ground level. The velocity that the atom acquired as a result of photon emission will be
A)
\[\frac{24hR}{25m}\]
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B)
\[\frac{25hR}{24m}\]
done
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C)
\[\frac{25m}{24hR}\]
done
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D)
\[\frac{24m}{25hR}\]
done
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A particle of mass of 4 kg suspended from a spring of force constant \[800\,\,N\,\,{{m}^{-1}}\] executes simple harmonic oscillations. If the total energy of the oscillator is 4 J, the maximum acceleration \[(in\,\,m\,{{s}^{-2}})\] of the particle is
A)
5
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B)
15
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C)
45
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D)
20
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A body of mass \[2\,\,kg\] is rotating on a circular path of radius \[0.8\,\,m\] with an angular velocity \[44\,\,red/\sec .\] If radius of path becomes \[1\,\,m\] then value of angular velocity will be
A)
35.28 rad/sec
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B)
14.08 rad/sec
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C)
28.16 rad/sec
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D)
24.08 rad/sec
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The motion of particle is described by the equation \[x=a+b{{t}^{2}},\] where \[a=15\,\,cm\] and \[b=3\,\,cm/{{\sec }^{2}}.\] Its instant velocity at time \[3\,\,\sec \] will be
A)
3 6 cm/sec
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B)
9 cm/sec
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C)
4.5 cm/sec
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D)
18 cm/sec
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An observer moves towards a stationary source of sound with a speed 1/5th of the speed of sound. The wavelength and frequency of the source emitted by any source be\[\lambda \] and f respectively. The apparent frequency and wavelength recorded by the observer are respectively
A)
\[0.8f,\]\[0.8\lambda \]
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B)
\[1.2f,\]\[1.2\lambda \]
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C)
\[1.2f,\]\[\lambda \]
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D)
\[f,\]\[1.2\lambda \]
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A coil of insulated wire is connected to a battery. If it is taken to galvanometer, its pointer is deflected, because
A)
induced current is produced
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B)
the coil acts like a magnet
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C)
the number of turns in the coil of the galvanometer are changed
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D)
None of these
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View Answer play_arrow
A heater of 220 V heats a volume of water in 5 minutes. A heater of 110 V heats the same volume of water in
A)
5 minutes
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B)
8 minutes
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C)
10 minutes
done
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D)
20 minutes
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A mass of m kg moving with a speed of 1.5 m/s on a horizontal smooth surface, collides with a nearly weightless spring of force constant k= 50 N/m. If the maximum compression of the spring is 0.15 m, the value of mass m is
A)
0.5 kg
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B)
0.15 kg
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C)
0.12 kg
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D)
1.5 kg
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View Answer play_arrow
The perfect gas equation for 4 gram of hydrogen gas is
A)
\[PV=RT\]
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B)
\[PV=2RT\]
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C)
\[PV=\frac{1}{2}RT\]
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D)
\[PV=4RT\]
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A parallel monochromatic beam of light is incident normally on a narrow slit. A dim-action pattern is formed on a screen placed perpendicular to the direction of the incident beam. At the first minimum of the diffraction pattern, the phase difference between the rays coming from the two edges of the slit is
A)
\[0\]
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B)
\[\pi /2\]
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C)
\[\pi \]
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D)
\[2\pi \]
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View Answer play_arrow
According to Einstein's photoelectric equation, the plot of the kinetic energy of the emitted photoelectrons from a metal vs the frequency of the incident radiation gives a straight line whose slope
A)
depends on the intensity of the radiation
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B)
depends on the nature of the metal used
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C)
depends both on the intensity of the radiation and the metal used
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D)
is the same for all metals and independent of the intensity of the radiation
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View Answer play_arrow
If a body of mass 3 kg is dropped from the top of a tower of height 45 m. Then its kinetic energy after 3 sec is \[[take\,\,g=10m/{{s}^{2}}]\]
A)
557 J
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B)
1450 J
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C)
1050 J
done
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D)
1296 J
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View Answer play_arrow
In a nuclear fission, 0.1% mass is converted into energy. The energy released by the fission of 1 kg mass will be
A)
\[9\times {{10}^{19}}\,J\]
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B)
\[9\times {{10}^{17}}\,J\]
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C)
\[9\times {{10}^{16}}\,J\]
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D)
\[9\times {{10}^{13}}\,J\]
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View Answer play_arrow
If the coefficient of cubical expansion is x times of the coefficient of superficial expansion, then value of x is
A)
3
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B)
2.5
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C)
1.5
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D)
2
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A projectile is thrown in the upward direction making an angle of \[60{}^\circ \] with the horizontal direction, with a velocity of \[147\,m{{s}^{-1}}.\] Then the time after which inclination with the horizontal is \[45{}^\circ ,\] is
A)
\[15(\sqrt{3}-1)\,s\]
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B)
\[15(\sqrt{3}+1)\,s\]
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C)
\[7.5(\sqrt{3}-1)\,s\]
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D)
\[7.5(\sqrt{3}+1)\,s\]
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View Answer play_arrow
An equilateral prism is placed on a horizontal surface. A ray PQ is incident onto it. For minimum deviation
A)
PQ is horizontal
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B)
QR is horizontal
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C)
RS is horizontal
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D)
any one will be horizontal
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View Answer play_arrow
A tin nucleus (atomic number Z = 50) has a radius of \[6.6\times {{10}^{-15}}m.\] The potential on its surface will be (the charge on the proton \[=1.6\times {{10}^{-19}}C\])
A)
\[1.1\times {{10}^{7}}\,V\]
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B)
\[2.1\times {{10}^{7}}\,V\]
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C)
\[3.1\times {{10}^{7}}\,V\]
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D)
\[0.15\times {{10}^{7}}\,V\]
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View Answer play_arrow
Consider an electric field \[\overrightarrow{E}={{E}_{0}}\hat{x}\] where \[{{E}_{0}}\] is a constant. The flux through the shaded area (as shown in the figure) due to this field is
A)
\[2{{E}_{0}}{{a}^{2}}\]
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B)
\[\sqrt{2}{{E}_{0}}{{a}^{2}}\]
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C)
\[{{E}_{0}}\,{{a}^{2}}\]
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D)
\[\frac{{{E}_{0}}{{a}^{2}}}{\sqrt{2}}\]
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Two rods of the same length and areas of cross- section \[{{A}_{1}}\] and \[{{A}_{2}}\] have their ends at the same temperature \[{{K}_{1}}\] and \[{{K}_{2}}\] are the thermal conductivities of the two rods. The rate of flow of heat is same in both rods if
A)
\[\frac{{{A}_{1}}}{{{A}_{2}}}=\frac{{{K}_{1}}}{{{K}_{2}}}\]
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B)
\[\frac{{{A}_{1}}}{{{A}_{2}}}=\frac{{{K}_{2}}}{{{K}_{1}}}\]
done
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C)
\[{{A}_{1}}{{A}_{2}}={{K}_{1}}{{K}_{2}}\]
done
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D)
\[{{A}_{1}}{{K}_{1}}^{2}={{A}_{2}}{{K}_{2}}^{2}\]
done
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View Answer play_arrow
A photon collides with a stationary hydrogen atom in ground state in elastically. Energy of the colliding photon is 10.2 eV. After a time interval of the order of micro second another photon collides with same hydrogen atom in elastically with an energy of 15 eV. What will be observed by the detector?
A)
2 photon of energy 10.2 eV
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B)
2 photon of energy 1.4 eV
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C)
One photon of energy 10.2 eV and an electron of energy 1.4 eV
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D)
One photon of energy 10.2 eV and another photon of 1.4 eV
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View Answer play_arrow
A cylindrical resonance tube, open at both ends, has a fundamental frequency fin air. If half of the length is dipped vertically in water, the fundamental frequency of the air column will be
A)
\[\frac{3f}{2}\]
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B)
\[2f\]
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C)
\[f\]
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D)
\[\frac{f}{2}\]
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View Answer play_arrow
The ionisation energy of hydrogen atom is 13.6 eV. Following Bohr's theory, the energy corresponding to a transition between the 3rd and the 4th orbit is
A)
\[3.40\,eV\]
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B)
\[1.51\,eV\]
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C)
\[0.85\,eV\]
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D)
\[0.66\,eV\]
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The kinetic energy of a body becomes four times its initial value. The new momentum will be
A)
same as initial value
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B)
twice the initial value
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C)
thrice the initial value
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D)
four times the initial value
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View Answer play_arrow
Error in the measurement of radius of a sphere is 1%. Then error in the measurement of volume is
A)
1%
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B)
5%
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C)
3%
done
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D)
8%
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The voltage time (V-t) graph for triangular wave having peak value \[{{V}_{0}}\] is as shown in figure. The rms value of V in time interval from t = 0 to T/4 is \[\frac{{{V}_{0}}}{\sqrt{x}}\]then find the value of x.
A)
5
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B)
4
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C)
7
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D)
3
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View Answer play_arrow
The \[I-V\]characteristics shown in figure represents
A)
ohmic conductors
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B)
non-ohmic conductors
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C)
insulators
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D)
superconductors
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View Answer play_arrow
A 2 kg copper block is heated to \[500{}^\circ C\] and then it is placed on a large block of ice at \[0{}^\circ C.\] If the specific heat capacity of copper is \[400\,J/kg{}^\circ C\] and latent heat of fusion of water is \[3.5\times {{10}^{5}}J/kg,\]the amount of ice that can melt is
A)
(7/8) kg
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B)
(7/5) kg
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C)
(8/7) kg
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D)
(5/7) kg
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View Answer play_arrow
A gymnast takes turns- with her arms & legs stretched. When she pulls her arms and legs in
A)
the angular velocity decreases
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B)
the moment of inertia decreases
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C)
the angular velocity stays constant
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D)
the angular momentum increases
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A current of I ampere flows in a wire forming a circular arc of radius r metres subtending an angle \[\theta \]at the centre as shown. The magnetic field at the centre O in tesla is
A)
\[\frac{{{\mu }_{0}}I\theta }{4\pi r}\]
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B)
\[\frac{{{\mu }_{0}}\,I\theta }{2\pi r}\]
done
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C)
\[\frac{{{\mu }_{0}}\,I\theta }{2r}\]
done
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D)
\[\frac{{{\mu }_{0}}\,I\theta }{4r}\]
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View Answer play_arrow
The number of degrees of freedom for each atom of a monoatomic gas is
A)
3
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B)
5
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C)
6
done
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D)
1
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View Answer play_arrow
A radioactive nuclei with decay constant 0.5/s is being produced at a constant rate of 100 nuclei/s. If at t = 0 there were no nuclei, the time when there are 50 nuclei is:
A)
\[1\,s\]
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B)
\[2\ln \left( \frac{4}{3} \right)s\]
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C)
\[\ln \,2\,s\]
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D)
\[\ln \left( \frac{4}{3} \right)s\]
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View Answer play_arrow
The velocity of electromagnetic radiation in a medium of permittivity \[{{\varepsilon }_{0}}\] and permeability \[{{\mu }_{0}}\] is given by
A)
\[\sqrt{\frac{{{\in }_{0}}}{{{\mu }_{0}}}}\]
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B)
\[\sqrt{{{\mu }_{0}}\,\,{{\in }_{0}}}\]
done
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C)
\[\frac{1}{\sqrt{{{\mu }_{0}}\,\,{{\in }_{0}}}}\]
done
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D)
\[\sqrt{\frac{{{\mu }_{0}}}{{{\in }_{0}}}}\]
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A uniform solid cylindrical roller of mass 'm' is being pulled on a horizontal surface with force F parallel to the surface and applied at its centre. If the acceleration of the cylinder is 'a' and it is rolling without slipping then the value of 'F' is:
A)
\[ma\]
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B)
\[\frac{5}{3}\,ma\]
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C)
\[\frac{3}{2}\,ma\]
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D)
\[2\,ma\]
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If L denotes the inductance of an inductor through which a current i is flowing, the dimensions of L \[{{i}^{2}}\] are
A)
\[[M{{L}^{2}}{{T}^{-2}}]\]
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B)
\[[ML{{T}^{-2}}]\]
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C)
\[[{{M}^{2}}{{L}^{2}}{{T}^{-2}}]\]
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D)
Not expressible in \[M,\,L,\,T\]
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View Answer play_arrow
Figure shows three oscillating LC circuit with identical inductors and capacitors. If \[{{t}_{1}},{{t}_{2}},{{t}_{3}}\] are the time taken by the circuits I, II, III for fully discharge, then
A)
\[{{t}_{1}}>{{t}_{2}}>{{t}_{3}}\]
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B)
\[{{t}_{1}}<{{t}_{2}}<{{t}_{3}}\]
done
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C)
\[{{t}_{2}}<{{t}_{1}}<{{t}_{3}}\]
done
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D)
\[{{t}_{3}}=\sqrt{{{t}_{1}}{{t}_{2}}}\]
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View Answer play_arrow
The internal resistance of a 2.1V cell which gives a current of 0.2 A through a resistance of \[10\Omega \]is
A)
\[0.5\,\Omega \]
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B)
\[0.8\,\Omega \]
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C)
\[1.0\,\Omega \]
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D)
\[0.2\,\Omega \]
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A spherical ball of iron of radius 2 mm is falling through a column of glycerine. If densities of glycerine and iron are respectively \[1.3\times {{10}^{3}}kg/{{m}^{3}}\] and \[8\times {{10}^{3}}kg/{{m}^{3}},\]\[\eta \]for glycerine \[=0.83N{{m}^{-2}}\sec ,\] then the terminal velocity is
A)
0.7 m/s
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B)
0.07 m/s
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C)
0.007 m/s
done
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D)
0.0007 m/s
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The time taken by light to pass through 4 mm thick glass slab of refractive index 1.5 will be (velocity of light in air \[=3\times {{10}^{8}}\,m/s\])
A)
\[8\times {{10}^{-11}}s\]
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B)
\[2\times {{10}^{-11}}s\]
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C)
\[3\times {{10}^{-11}}s\]
done
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D)
\[4\times {{10}^{-11}}s\]
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Surface tension of a solution is \[30\times {{10}^{-2}}N/m.\] The radius of the soap bubble is 5 cm. The surface energy of soap bubble is
A)
\[1.8\times {{10}^{1}}\,J\]
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B)
\[1.8\times {{10}^{2}}\,J\]
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C)
\[1.0\times {{10}^{-1}}\,J\]
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D)
\[1.8\times {{10}^{-2}}\,J\]
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View Answer play_arrow
The half-life \[o{{f}^{215}}\] At is\[100\mu s.\] The time taken for the radioactivity of a sample \[o{{f}^{215}}\]At to decay to\[1/{{16}^{th}}\]of its initial value is
A)
\[400\mu s\]
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B)
\[6.3\mu s\]
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C)
\[40\mu s\]
done
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D)
\[300\mu s\]
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View Answer play_arrow
In household electric circuit, which of the following statements is/are incorrect
A)
all electric appliances drawing power are joined in parallel
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B)
a switch may be either in series or in parallel with the appliance which it controls
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C)
if a switch is in parallel with an appliance, it will draw power when the switch is in the 'off position (open)
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D)
if a switch is in parallel with an appliance, the fuse will blow (burn out) when the switch is put 'on' closed.
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View Answer play_arrow
In an p-n-p transistor working as a common base amplifier current gain is 0.96 and emitter current is 7.2 mA. The base current is
A)
0.5 mA
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B)
0.29 mA
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C)
0.35 mA
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D)
0.4 mA
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An intersteller spacecraft far away from the influence of any star or planet is moving at high speed under the influence of fusion rockets (due to thrust exerted by fusion rockets, the space crafts is accelerating). Suddenly the engine malfunctions and stops. The spacecraft will
A)
immediately stops, throwing all of the occupants to the front
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B)
begins slowing down and eventually comes to rest
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C)
keep moving at constant speed for a while, and then begins to slow down
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D)
keeps moving forever with constant speed
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View Answer play_arrow
A capacitor of \[4\,\mu F\] is connected as shown in the circuit. The internal resistance of the battery is \[0.5\Omega .\] The amount of charge on the capacitor plates will be
A)
\[0\mu C\]
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B)
\[4\mu C\]
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C)
\[16\mu C\]
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D)
\[8\mu C\]
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View Answer play_arrow
IUPAC name of the following compound:
A)
N, N-dimethylcyclopropanecarboxamide
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B)
N-methylcyclopropanamide
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C)
cyclopropionamide
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D)
none of the above
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View Answer play_arrow
Match the columns
Column-I Column-II [A] Argyrol (p) Kalazar [B] Antimony (q) Intramuscular injection [C] Colloidal gold (r) Stomach disorders [D] Milk of magnesia (s) Eye lotion
A)
A-(r), B-(p), C-(s), D-(q)
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B)
A-(r), B-(p), C-(q), D-(s)
done
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C)
A-(s), B-(q), C-(p) D-(s)
done
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D)
A-(s), B-(p), C-(q), D-(r)
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A is a lighter phenol and B is an aromatic carboxylic acid. Separation of a mixture of A and B can be carried out easily by using a solution of:
A)
Sodium hydroxide
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B)
Sodium sulphate
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C)
Calcium chloride
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D)
Sodium bicarbonate
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View Answer play_arrow
\[(Ag+Pb)\,alloy\xrightarrow[Zinc\,\,is\,\,added]{Melt\,\,and}\] \[(Ag+Pb+Zn)\,melt\xrightarrow{Cool}\,\,\xrightarrow[Layer\,\,Y]{Layer\,\,X}\] Select correct statement based on above scheme.
A)
Layer X contains Zn and Ag
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B)
Layer Y contains Pb and Ag but amount of silver in this layer is smaller than in layer X
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C)
X and Y are immiscible layers
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D)
All are correct statements
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View Answer play_arrow
The rate of a reaction A doubles on increasing the temperature from 300 to 310 K. By how much, the temperature of reaction B should be increased from 300 K so that rate doubles if activation energy of the reaction B is twice to that of reaction A.
A)
9.84 K
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B)
4.92 K
done
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C)
2.45 K
done
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D)
19.67 K
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View Answer play_arrow
Which of the following is not correct? Silent electric
A)
\[3{{O}_{2}}\underset{disch\arg e}{\overset{Silent\,\,electric}{\longleftrightarrow}}2{{O}_{3}};\,\,\Delta H=+284.5\,kJ.\]
done
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B)
Ozone undergoes addition reaction with unsaturated carbon compounds.
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C)
Sodium thiosulphate reacts with L to form sodium tetrathionate and sodium iodide.
done
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D)
Ozone oxidises lead sulphide to lead sulphate.
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View Answer play_arrow
(I) \[n=3,\] \[l=2,\]\[{{m}_{1}}=-2\] (II) \[n=3,\] \[l=1,\]\[{{m}_{1}}=0\] (III) \[n=3,\] \[l=0,\] \[{{m}_{1}}=-1\] (IV) \[n=3,\] \[l=2,\] \[{{m}_{1}}=0\] (V) \[n=3,\] \[l=3,\] \[{{m}_{1}}=-2\] Of these question state designation which does not describe an allowed state for an electron in an atom?
A)
I and IV
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B)
III and V
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C)
II and V
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D)
IV and V
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View Answer play_arrow
Which of the following compounds is a good conductor of electricity in solution state?
A)
covalent
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B)
molecular solid
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C)
metallic solid
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D)
ionic compounds
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View Answer play_arrow
Which is the most suitable reagent among the following to distinguish compound (3) from rest of the compounds? 1. \[C{{H}_{3}}-C\equiv C-C{{H}_{3}}\] 2. \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\] 3. \[C{{H}_{3}}-C{{H}_{2}}C\equiv CH\] 4. \[C{{H}_{3}}-CH=C{{H}_{2}}.\]
A)
Bromine in carbon tetrachloride
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B)
Bromine in acetic acid
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C)
Alk\[KMn{{O}_{4}}\]
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D)
Ammonical silver nitrate.
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View Answer play_arrow
\[{{N}_{2}}+3{{H}_{2}}\xrightarrow{{}}2N{{H}_{3}}.\] In this reaction equivalent weight of\[{{N}_{2}}\] is
A)
4.67
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B)
28
done
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C)
14
done
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D)
2.33
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View Answer play_arrow
Which of the following is/are the hazardous pollutant(s) present in automobile exhaust gases?
(i) \[{{N}_{2}}\] (ii) \[CO\] (iii) \[C{{H}_{4}}\] (iv) Oxides of nitrogen
A)
(ii) and (iii)
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B)
(i) and (ii)
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C)
(ii) and (iv)
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D)
(i) and (iii)
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View Answer play_arrow
\[Z{{n}^{2+}}\to Z{{n}_{(s)}};\,\,{{E}^{0}}=-0.76\,\,V\] \[C{{u}^{2+}}\to C{{u}_{(s)}};\,\,{{E}^{0}}=-0.34\,\,V\] Which of the following is spontaneous?
A)
\[Z{{n}^{2+}}+Cu\to Zn+C{{u}^{2+}}\]
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B)
\[C{{u}^{2+}}+Zn\to Cu+Z{{n}^{2+}}\]
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C)
\[Z{{n}^{2+}}+C{{u}^{2+}}\to Zn+Cu\]
done
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D)
None of these
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View Answer play_arrow
In the form of dichromate, Cr (VI) is a strong oxidising agent in acidic medium but Mo (VI) in \[Mo{{O}_{3}}\] and W (VI) in\[W{{O}_{3}}\]are not because\[\_\_\_\_\_\_\_\_.\]
(i) Cr (VI) is more stable than Mo (VI) and W (VI). (u) Mo (VI) and W (VI) are more stable than Cr (VI). (iii) Higher oxidation states of heavier members of group-6 of transition series are more stable. (iv) Lower oxidation states of heavier members of group-6 of transition series are more stable.
A)
(i) and (ii)
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B)
(ii) and (iii)
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C)
(i) and (iv)
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D)
(ii) and (iv)
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A)
I and II represent tetrahedral holes
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B)
II, III and IV represent tetrahedral holes
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C)
I and II represent octahedral holes
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D)
I, II and IV represent octahedral holes
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View Answer play_arrow
An alkene having molecular formula\[{{C}_{7}}{{H}_{14}}\]was subjected to ozonolysis in the presence of zinc dust. An equimolar amount of the following two compounds was obtained
and
The IUPAC name of the alkene is .
A)
3, 4-dimethyl-3-pentene
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B)
3, 4-dimethyl-2-pentene
done
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C)
2, 3-dimethyl-3-pentene
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D)
2, 3-dimethyl-2-pentene
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View Answer play_arrow
At a particular temperature, the vapour pressures of two liquids A and B are respectively 120 and 180 mm of mercury. If 2 moles of A and 3 moles of B are mixed to form an ideal solution, the vapour pressure of the solution at the same temperature will be (in mm of mercury)
A)
156
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B)
145
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C)
150
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D)
108
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View Answer play_arrow
Which of the following complex ions is expected to absorb visible light?
A)
\[{{[Ti\,\,{{(en)}_{2}}{{(N{{H}_{3}})}_{2}}]}^{4+}}\]
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B)
\[{{[Cr\,\,{{(N{{H}_{3}})}_{6}}]}^{3+}}\]
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C)
\[{{[Zn\,\,{{(N{{H}_{3}})}_{6}}]}^{2+}}\]
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D)
\[{{[Sc\,\,{{({{H}_{2}}O)}_{3}}{{(N{{H}_{3}})}_{3}}]}^{3+}}\] (At. no. Zn = 30, Sc = 21, Ti = 22, Cr = 24)
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View Answer play_arrow
According to the adsorption theory of catalysis, the speed of the reaction increases because-
A)
Adsorption lowers the activation energy of the reaction.
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B)
The concentration of reactant molecules at the active centers of the catalyst becomes high due to strong adsorption.
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C)
In the process of adsorption, the activation energy of the molecules becomes large.
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D)
Adsorption produces heat which increases the speed of the reaction.
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View Answer play_arrow
A pressure cooker reduces cooking time for food because
A)
boiling point of water involved in cooking is increased.
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B)
the higher pressure inside the cooker crushes the food material.
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C)
cooking involves chemical changes helped by a rise in temperature.
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D)
heat is more evenly distributed in the cooking space.
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View Answer play_arrow
Most reactive halide towards\[{{S}_{N}}1\] reaction is
A)
n-Butyl chloride
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B)
sec-Butyl chloride
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C)
tert-Butyl chloride
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D)
Allyl chloride
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View Answer play_arrow
The absolute configuration of the following :
A)
2S, 3R
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B)
2S, 3S
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C)
2R, 3S
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D)
2R, 3R
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View Answer play_arrow
The rate constant k, for the reaction \[{{N}_{2}}{{O}_{5}}(g)\xrightarrow{{}}2N{{O}_{2}}(g)+\frac{1}{2}{{O}_{2}}(g)\] is\[1.3\times {{10}^{-2}}{{s}^{-1}}.\] Which equation given below describes the change of\[[{{N}_{2}}{{O}_{5}}]\]with time? \[{{[{{N}_{2}}{{O}_{5}}]}_{0}}\]and\[{{[{{N}_{2}}{{O}_{5}}]}_{t}}\]correspond to concentration \[{{N}_{2}}{{O}_{5}}\]of initially and at time t.
A)
\[[{{N}_{2}}{{O}_{5}}]t={{[{{N}_{2}}{{O}_{5}}]}_{0}}+kt\]
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B)
\[{{[{{N}_{2}}{{O}_{5}}]}_{0}}={{[{{N}_{2}}{{O}_{5}}]}_{t}}{{e}^{kt}}\]
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C)
\[log{{[{{N}_{2}}{{O}_{5}}]}_{t}}=\log {{[{{N}_{2}}{{O}_{5}}]}_{0}}+kt\]
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D)
In \[\frac{{{[{{N}_{2}}{{P}_{5}}]}_{0}}}{{{[{{N}_{2}}{{P}_{5}}]}_{t}}}=kt\]
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View Answer play_arrow
Among the following the most stable compound is :
A)
cis-1, 2-cyclohexanediol
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B)
trans-1, 2-cyclohexanediol
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C)
cis-1, 3 ?cyclohexanediol
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D)
trans-1, 3-cyclohexanediol
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View Answer play_arrow
Lead is not affected by dil. HCl in cold because
A)
Pb is less electronegative than H.
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B)
PbO film is formed which resists chemical attack by acid.
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C)
\[PbC{{L}_{2}}\] protective coating gets formed on Pb surface.
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D)
\[Pb{{O}_{2}}\]film is always present on Pb surface, which resist chemical attack.
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View Answer play_arrow
Aniline is reacted with bromine water and the resulting product is treated with an aqueous solution of sodium nitrite in presence of dilute hydrochloric acid. The compound so formed is converted into a tetrafluoroborate which is subsequently heated dry. The final product is
A)
1,3,5-tribromobenzene
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B)
p-bromofluorobenzene
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C)
p-bromoaniline
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D)
2, 4, 6-tribromofluorobenzene
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View Answer play_arrow
With which one of the following elements silicon should be doped so as to give p-type of semiconductor?
A)
Germanium
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B)
Arsenic
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C)
Selenium
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D)
Boron
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View Answer play_arrow
X is identified as
A)
2, 4, 6-tribromophenol
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B)
2-bromo-4-hydroxylbenzene sulphonic acid
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C)
3, 5-dibromo-4-hydroxybenzene sulphonic acid
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D)
2-bromophenol
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View Answer play_arrow
The packing efficiency of the two-dimensional square unit cell shown below is:
A)
39.27%
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B)
68.02%
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C)
74.05%
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D)
78.54%
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View Answer play_arrow
Aminoglycosides are usually used as:
A)
Antibiotic
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B)
Analgesic
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C)
Hypnotic
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D)
Antifertility
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View Answer play_arrow
Aluminium displaces hydrogen from acids but copper does not. A galvanic cell prepared by combining \[Cu/C{{u}^{2+}}\]and\[Al/A{{l}^{3+}}\]has an e.m.f of 2.0 V at \[298{}^\circ K.\] If the potential of copper electrode is \[+0.34\,\,V\] that of aluminium is
A)
\[+1.66\,\,V\]
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B)
\[-1.66\,\,V\]
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C)
\[+2.34\,\,V\]
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D)
\[-2.3\,\,V\]
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View Answer play_arrow
An organic compound X on treatment with pyridinium chlorochromate in dichloromethane gives compound Y. Compound Y reacts with \[{{I}_{2}}\]and alkali to form triiodomethane. The compound 'X' is
A)
\[{{C}_{2}}{{H}_{5}}OH\]
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B)
\[C{{H}_{3}}CHO\]
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C)
\[C{{H}_{3}}COC{{H}_{3}}\]
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D)
\[C{{H}_{3}}COOH\]
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View Answer play_arrow
A sudden large jumps between the values of second and third ionization energies of an element, would be associated with which of the following electronic configuration?
A)
\[1{{s}^{2}},\]\[2{{s}^{2}},\]\[2{{p}^{6}},\]\[3{{s}^{1}}\]
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B)
\[1{{s}^{2}},\]\[2{{s}^{2}},\]\[2{{p}^{6}},\]\[3{{s}^{1}},\]\[3{{p}^{1}}\]
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C)
\[1{{s}^{2}},\]\[2{{s}^{2}},\]\[2{{p}^{6}},\]\[3{{s}^{2}}\]
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D)
\[1{{s}^{2}},\]\[2{{s}^{2}},\]\[2{{p}^{6}},\]\[3{{s}^{2}},\]\[3{{p}^{2}}\]
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View Answer play_arrow
Which is major product formed when acetone is heated with iodine and potassium hydroxide?
A)
lodoacetone
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B)
Acetic acid
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C)
lodoform
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D)
Acetophenone
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View Answer play_arrow
On increasing the pressure, the gas phase reaction proceed forward to re-establish equilibrium, as predicted by applying the Le-Chatelier's principle. Consider the reaction. \[{{N}_{2}}(g)+3{{H}_{2}}(g)2N{{H}_{3}}(g)\] Which of the following is correct, if the total pressure at which the equilibrium is established, is increased without changing the temperature?
A)
K will remain same
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B)
K will decrease
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C)
K will increase
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D)
K will increase initially and decrease when pressure is very high
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View Answer play_arrow
Ethanol can be prepared more easily by which reaction?
(i) \[C{{H}_{3}}C{{H}_{2}}Br+{{H}_{2}}O\xrightarrow{{}}C{{H}_{3}}C{{H}_{2}}OH\] (ii) \[C{{H}_{3}}C{{H}_{2}}Br+A{{g}_{2}}O\](in boiling water)\[\xrightarrow{{}}C{{H}_{3}}C{{H}_{2}}OH\]
A)
by (i) reaction
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B)
by (ii) reaction
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C)
Both reactions proceed at same rate
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D)
by none
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View Answer play_arrow
The oxidation states of iodine in \[HI{{O}_{4}},\]\[{{H}_{3}}I{{O}_{5}}\] and \[{{H}_{5}}I{{O}_{6}}\] are respectively
A)
+1, +3, +7
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B)
+7, +7, +3
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C)
+7, +7, +7
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D)
+7, +5, +3
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View Answer play_arrow
Which is correct statement?
A)
Starch is a polymer of \[\alpha \text{-}\]glucose.
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B)
In cyclic structure of fructose, there are four carbons and one oxygen atom.
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C)
Amylose is a component of cellulose.
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D)
Proteins are composed of only one type of amino acids.
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View Answer play_arrow
Regarding \[{{F}^{-}}\] and \[C{{l}^{-}}\] which of the following statements is/are correct?
(i) \[C{{l}^{-}}\]can give up an electron more easily than\[{{F}^{-}}.\] (ii) \[C{{l}^{-}}\]is a better reducing agent than \[{{F}^{-}}.\] (iii) \[C{{l}^{-}}\]is smaller in size than \[{{F}^{-}}.\] (iv) \[{{F}^{-}}\]can be oxidized more readily than \[C{{l}^{-}}.\]
A)
(i) and (ii)
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B)
(i), (ii) and (iv)
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C)
(iii) and (iv)
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D)
only (i)
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View Answer play_arrow
Among the following, the species having square planar geometry for central atom are
(i) \[Xe{{F}_{4}}\] (ii) \[S{{F}_{4}}\] (iii) \[{{[NiC{{l}_{4}}]}^{2-}}\] (iv) \[{{[PtC{{l}_{4}}]}^{2-}}\]
A)
(i) and (iv)
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B)
(i) and (ii)
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C)
(ii) and (iii)
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D)
(iii) and (iv)
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View Answer play_arrow
Carbon and silicon belong to group 14. The maximum coordination number of carbon in commonly occurring compounds is 4, whereas that of silicon is 6. This is due to
A)
large size of silicon.
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B)
more electropositive nature of silicon.
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C)
availability of d-orbitals in silicon.
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D)
Both [a] and [b]
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View Answer play_arrow
Which one of the following statement is not true?
A)
In vulcanization the formation of sulphur bridges between different chains make rubber harder and stronger.
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B)
Natural rubber has the trans ?configuration at every double bond.
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C)
Buna-S is a copolymer of butadiene and styrene.
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D)
Natural rubber is a 1, 4 - polymer of isoprene.
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View Answer play_arrow
For a first order reaction, to obtain a positive slope, we need to plot {where [A] is the concentration of reactant A}
A)
\[-{{\log }_{10}}[A]\,\,vs\,\,t\]
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B)
\[-{{\log }_{e}}[A]\,\,vs\,\,t\]
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C)
\[{{\log }_{10}}[A]\,\,vs\,\,\log \,\,t\]
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D)
\[[A]\,\,vs\,\,t\]
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View Answer play_arrow
Among the following molecules
(i) \[Xe{{O}_{3}}\] (ii) \[XeO{{F}_{4}}\] (iii) \[Xe{{F}_{6}}\] Those having same number of lone pairs on Xe are
A)
(i) and (ii) only
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B)
(i) and (iii) only
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C)
(ii) and (iii) only
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D)
(i), (ii) and (iii)
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View Answer play_arrow
If the energy difference between the ground state of an atom and its excited state is\[4.4\times {{10}^{-4}}J,\] the wavelength of photon required to produce the transition :
A)
\[2.26\times {{10}^{-22}}m\]
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B)
\[1.13\times {{10}^{-22}}m\]
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C)
(e) \[4.52\times {{10}^{-26}}m\]
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D)
\[4.52\times {{10}^{-22}}m\]
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View Answer play_arrow
Which of the following is not a fat soluble vitamin?
A)
Vitamin B complex
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B)
Vitamin D
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C)
Vitamin E
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D)
Vitamin A
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View Answer play_arrow
The first organisms to appear on earth were
A)
photoautotrophs
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B)
chemoautotrophs
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C)
chemoheterotrophs
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D)
heterotrophs
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View Answer play_arrow
Which of the following bacteria is/are photosynthetic autotrophs?
A)
Purple sulphur bacteria
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B)
Green sulphur bacteria
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C)
Cyanobacteria
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D)
All of the above
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View Answer play_arrow
A water fern which is used as a green manure in rice fields is
A)
Salvinia
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B)
Mucor
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C)
Aspergillus
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D)
Azolla
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View Answer play_arrow
Which of the following does not have stomata?
A)
Hydrophytes
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B)
Mesophytes
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C)
Xerophytes
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D)
Submerged hydrophytes
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View Answer play_arrow
Which is correct about transport or conduction of substances?
A)
Organic food moves up through phloem
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B)
Organic food moves up through xylem
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C)
Inorganic food moves upwardly and downwardly through xylem
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D)
Organic food moves upwardly and downwardly through phloem
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View Answer play_arrow
The quiescent centre in root meristem serves as a
A)
site for storage of food which is utilized during maturation.
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B)
reservoir of growth hormones.
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C)
reserve for replenishment of damaged cells of the meristem.
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D)
region for absorption of water.
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View Answer play_arrow
This plant was introduced in India because of its beautiful flowers and shape of leaves but it became a notorious weed in Indian water bodies. Identify this plant.
A)
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B)
done
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C)
done
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D)
done
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View Answer play_arrow
The given figures (A and B) show the modification of roots. Which of the following statements regarding the figures is correct?
A)
Tap roots of carrot, turnip and adventitious root of sweet potato, get swollen and store food.
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B)
Pneumatophores conducts water, minerals & photosynthesis
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C)
Pneumatophore is found in the plants that grow in sandy soil.
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D)
Turnip & carrot shows adventitious roots and sweet potato shows tap root.
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View Answer play_arrow
Conifers are especially sensitive to acid rain because their needles literally take moisture out of clouds. Because of acid rain, Mt. Mitchell, the highest peak in the eastern Appalachians, has seen dramatic loss of pine forest. The damage on this mountain most likely stems from
A)
drought-like conditions in the region.
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B)
excessive sulphur in the atmosphere due to industrialization along the eastern seaboard.
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C)
loss of biomass throughout the Appalachians.
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D)
All of the above
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View Answer play_arrow
Which of the following steps is not taken for reducing vehicular pollution?
A)
Use of unleaded petrol.
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B)
Use of high-sulphur petrol and diesel.
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C)
Use of catalytic converters in vehicles.
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D)
Application of stringent pollution-level norms for vehicles.
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View Answer play_arrow
Stirred tank bioreactors have been designed for
A)
addition of preservatives to the product
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B)
purification of theproduct
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C)
ensuring anaerobic conditions in the culture vessel
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D)
availability of oxygen throughout the process
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View Answer play_arrow
Which of the following pair has haploid structures?
A)
Nucellus and antipodal cells
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B)
Antipodal cells and egg cell
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C)
Antipodal cells and megaspore mother cell
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D)
Nucellus and primary endosperm nucleus
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View Answer play_arrow
Identify the different parts of a typical dicot embryo labelled as A, B and C and select the correct option.
A)
A - Plumule B - Cotyledons C ? Radicle
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B)
A - Radicle B - Cotyledons C ? Plumule
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C)
A - Cotyledons B - Plumule C ? Radicle
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D)
A - Cotyledons B - Radicle C - Plumule
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View Answer play_arrow
Double fertilization is fusion of
A)
two eggs
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B)
two eggs and polar nuclei with pollen nuclei
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C)
one male gamete with egg and other with synergid
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D)
one male gamete with egg and other with secondary nucleus
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View Answer play_arrow
Acacia trees endure a 7-month dry season in the African savanna by dropping their leaves. This adaptation allows the trees to
A)
conserve valuable water.
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B)
trap extra carbon dioxide.
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C)
increase the rate of photosynthesis.
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D)
move water and nutrients upward from the roots.
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View Answer play_arrow
'Whip-tail' disease in cauliflower is noted due to deficiency of
A)
manganese
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B)
magnesium
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C)
molybdenum
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D)
nitrogen
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View Answer play_arrow
Six tubes containing preparations from animal tis- sue were set up as shown in the table. Tube con- tents
(i) glucose + homogenised cells (ii) glucose + mitochondria (iii) glucose + cytoplasm lacking organelles (iv) pyruvic acid + homogenised cells (v) pyruvic acid + mitochondria (vi) pyruvic add + cytoplasm lacking organelles After incubation, in which three tubes would carbon dioxide be produced?
A)
(i), (ii) and (iii)
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B)
(i), (iv) and (v)
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C)
(iii), (iv) and (vi)
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D)
(iii), (v) and (vi)
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View Answer play_arrow
Carbon dioxide labelled with \[^{14}C\] has been used to identify the intermediate compounds in the Calvin cycle, the light independent stage in photosynthesis. Which compound would be the first to contain the \[^{14}C?\]
A)
glucose
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B)
starch
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C)
GP(PGA)
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D)
triose phosphate
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View Answer play_arrow
Which one of the following is essential for photolysis of water?
A)
Manganese
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B)
Zinc
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C)
Copper
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D)
Boron
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View Answer play_arrow
Three or four of the following elements are absorbed by terrestrial plants as ions or components of ions. Which, if any, of the following is NOT absorbed by plants as an ion? If all are absorbed in ionic form, choose answer :
A)
Phosphorus
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B)
Carbon
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C)
Nitrogen
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D)
Magnesium
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View Answer play_arrow
The graph below shows the relationship between diameter of stomatal aperture and rate of transpiration in still air and in moving air.
At which point on the graph is the rate of transpiration independent of stomatal aperture?
A)
A or E
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B)
C
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C)
D
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D)
B
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View Answer play_arrow
The dihybrid ratio in \[{{F}_{2}}\] - generation is
A)
1 : 1 : 1 : 1
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B)
2 : 1 : 2 : 1
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C)
3 : 1
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D)
9 : 3 : 3 : 1
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View Answer play_arrow
The zone of atmosphere that lies near the ground is
A)
troposphere
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B)
stratosphere
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C)
homosphere
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D)
ionosphere
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View Answer play_arrow
Reverse transcriptase is
A)
RNA dependent RNA polymerase
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B)
DNA dependent RNA polymerase
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C)
DNA dependent DNA polymerase
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D)
RNA dependent DNA polymerase
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View Answer play_arrow
Which of the following is a variety of Brassica resistant to white rust disease?
A)
Himgiri
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B)
Pusa komal
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C)
Pusa swamim (Karan rai)
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D)
Pusa Sadabahar
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View Answer play_arrow
A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this.
(i) Lots of urea and phosphate fertilizer were used in the crops in the vicinity (ii) The area was sprayed with DDT by an aircraft (iii) The lake water turned green and stinky (iv) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis.
A)
(i) and (iii)
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B)
(i), (ii) and (iv)
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C)
(iii) and (iv)
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D)
(ii), (iii) and (iv)
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View Answer play_arrow
Which of the following features would be characteristic of the stratosphere but not of the troposphere?
A)
Most ozone resides here
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B)
Most water vapour resides here
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C)
Most of the mass of the atmosphere lies here
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D)
Circulation of this layer influences oceans currents
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View Answer play_arrow
Glycogen is a polymer of
A)
galactose
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B)
glucose
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C)
fructose
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D)
sucrose
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View Answer play_arrow
What is the end product of glycolysis of a glucose molecule?
A)
Fructose 1, 6-diphosphate
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B)
Pyruvate and ATP
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C)
Phosphoglyceraldehyde
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D)
Lactic acid and ATP
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View Answer play_arrow
In some succulent plants like Opuntia the R. Q. is zero because
A)
\[C{{O}_{2}}\] is released without any absorption of \[{{O}_{2}}\]
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B)
\[{{O}_{2}}\] is absorbed but \[C{{O}_{2}}\] is not released
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C)
There is often compensation point in these plants due to thick phylloclades
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D)
None of these
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View Answer play_arrow
Electrons are picked up by an electron acceptor which passes them to an electron transport system consisting of
A)
phytochromes
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B)
cytochromes
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C)
Z-scheme
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D)
redox potential scale
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View Answer play_arrow
In humans, the hormone testosterone enters cells and binds to specific proteins, which in turn bind to specific sites on the cells' DNA. These proteins probably act to
A)
help KNA polymerase transcribe certain genes.
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B)
alter the pattern of DNA splicing.
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C)
stimulate protein synthesis.
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D)
unwind the DNA so that its genes can be transcribed.
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View Answer play_arrow
Given below is the pathway (2-scheme) of light reaction. Identify the blanks indicated by A, B, C and D.
A)
A - P 700 B - \[{{H}^{+}}\] acceptor C - P680 D - \[NAD{{P}^{+}}\]
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B)
A ? Photosystem I B - \[{{e}^{-}}\] acceptor C - Photosystem II D - \[NADP{{H}_{2}}+ATP\]
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C)
A ? Photosystem I B - \[{{H}^{+}}\] acceptor C - P700 D - \[NADPH\]
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D)
A ? Photosystem III B - \[{{e}^{-}}\] acceptor C - Photosystem I D - \[NADPH+{{H}^{+}}\]
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View Answer play_arrow
Consumption of which one of the following foods can prevent the kind of blindness associated with vitamin 'A' deficiency?
A)
'Flavr Savr' tomato
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B)
Canola
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C)
Golden rice
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D)
Bt-Brinjal
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View Answer play_arrow
Biodiversity of a geographical region represents
A)
endangered species found in the region.
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B)
the diversity in the organisms living in the region.
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C)
genetic diversity present in the dominant species of the region.
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D)
species endemic to the region.
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View Answer play_arrow
Use of transgenic plants as biological factories for the production of special chemicals is called-
A)
Molecular farming
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B)
Molecular genetics
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C)
Molecular mapping
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D)
Dry farming
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View Answer play_arrow
Which of the following sets consists of endangered wild life species of India?
A)
Egret, black boar and spotted deer
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B)
Himalayan musk deer, black buck, Indian lion and rhino
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C)
Himalayan musk deer, Indian lion, rhino and wild buffalo
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D)
Himalayan musk deer, great Indian bustard, wild ass and Kashmir stag
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Agarose extracted from sea weeds finds use in:
A)
Spectrophotometry
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B)
Tissue culture
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C)
PCR
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D)
Gel electrophoresis
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Select the wrongly matched pair of antibiotic to its source
A)
Terramycin - Streptomyces rimosus
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B)
Erythromycin - Streptomyces griseus
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C)
Neomycin - Streptomyces fradiae
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D)
Gramicidin - Bacillus brevis
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Which organelle is surrounded by a double phospholipid bilayer with many large pores?
A)
Nuclear envelope
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B)
Plasma membrane
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C)
Golgi apparatus
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D)
Mitochondrion
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Niche overlap indicates
A)
two different parasites on the same host
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B)
sharing of one or more resources between the two species
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C)
mutualism between two species
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D)
active cooperation between two species
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Coconut milk (coconut water) is widely used in tissue culture because it contains
A)
auxins
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B)
ethylene
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C)
cytokinin
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D)
gibberellins
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The okazaki fragments in DNA chain growth
A)
polymerize in the 3' - to - 5' direction and forms replication fork
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B)
proves semi-conservative nature of DNA replication
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C)
polymerize in the 5' - to - 3' direction and explain 3' - to - 5' DNA replication
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D)
result in transcription
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Leghaemoglobin helps in
A)
nitrogen fixation
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B)
protecting nitrogenase from \[{{O}_{2}}\]
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C)
destroys bacteria
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D)
transport of food in plants
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Important objective of biotechnology in agriculture section is -
A)
To produce pest resistant varieties of plants
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B)
To increase the nitrogen content
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C)
To decrease the seed number
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D)
To increase the plant weight
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The combination of a true coelom and repeating body segmentation allows the annelids to do which of the following that anatomically "simpler" worms cannot?
A)
Move through loose marine sediments
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B)
Attain complex body shapes and thus locomote more precisely
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C)
Feed as external parasites on other animals
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D)
Be hermaphroditic
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Which bacteria is utilized in gober gas plant?
A)
Methanogens
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B)
Nitrifying bacteria
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C)
Ammonifying bacteria
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D)
Denitrifying bacteria
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Excretory organs of Cockroach are
A)
flame cells
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B)
nephridia
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C)
green glands
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D)
malpighian tubules
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What is common among silverfish, scorpion, crab and honey bee?
A)
Compound eyes
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B)
Poison gland
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C)
Jointed legs
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D)
Metamorphosis
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Tendons and ligaments are the example of
A)
areolar connective tissue
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B)
adipose tissue
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C)
dense regular connective tissue
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D)
loose connective tissue
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The type of epithelial cells which line inner surface of fallopian tubes, bronchioles and small bronchi are known as
A)
squamous epithelium
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B)
columnar epithelium
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C)
ciliated epithelium
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D)
cubical epithelium
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The graph below shows how gaseous exchange in an amphibian varies with temperature.
The graph shows that at all temperatures the lungs:
A)
absorb more oxygen than the skin
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B)
absorb less oxygen than the skin
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C)
release more carbon dioxide than the skin
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D)
release less carbon dioxide than the skin
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Mark the unmatched one
A)
Neutrophils ? Phagocytic
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B)
Basophils - Secrete histamine
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C)
Acidophils - Secrete heparin
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D)
Lymphocytes - Secrete antibodies
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Match Column-1 with Column-11 and select the correct option from the codes given below.
Column-I Column-II A Cleavage (I) Fertilization B Morula (II) Mitotic divisions C Polyspermy (III) Endometric D Implantation (IV) Little mulberry
A)
A\[\to \](II), B\[\to \](I), C\[\to \](IV), D\[\to \](III)
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B)
A\[\to \](I), B\[\to \](IV), C\[\to \](II), D\[\to \](III)
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C)
A\[\to \](IV), B\[\to \](II), C\[\to \](I), D\[\to \](III)
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D)
A\[\to \](II), B\[\to \](IV),C\[\to \](III), D\[\to \](I)
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If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from
A)
testes to epididymis
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B)
epididymis to vas deferens
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C)
ovary to uterus
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D)
vagina to uterus
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Where is one least likely to find complete semen (all components are present)?
A)
At the junction of the bulbourethral duct and the urethra
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B)
In the epididymis
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C)
At the male urethral orifice
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D)
In the vagina of a woman whose trying to become pregnant
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Plants of salty sea shore wet lands are :
A)
heliophytes
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B)
hydrophytes
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C)
halophytes
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D)
saprophytes
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Colostrum
A)
is a hormone essential for milk secretion.
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B)
can be synthesized by the newborn infant but not by a foetus.
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C)
stimulates further secretion of oxytocin for uterine contraction.
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D)
is a source of antibodies essential to develop resistance against diseases in new born babies.
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The diagram below shows a mammalian nephron and indicate how it functions in three parts, x, y and z. In x the adrenal glands have been removed In y the adrenal glands have been left intact (control). In z the adrenal glands have been removed and an extract of adrenal hormone produced which was then injected back into the same animal.
Which one of the following accounts for the higher rate of reabsorption of \[N{{a}^{+}}\] in z?
A)
The hormone present was purer in the extract.
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B)
The extract may have contained impurities.
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C)
The amount of hormone injected was greater than the amount of hormone in y.
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D)
The \[N{{a}^{+}}\] content of the body fluids was low in the experimental animals.
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The logistic population growth is expressed by the equation :
A)
\[dt/dN=Nr\left( \frac{K-N}{K} \right)\]
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B)
\[dN/dt=rN\left( \frac{K-N}{K} \right)\]
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C)
\[dN/dt=rN\]
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D)
\[dN/dt=rN\left( \frac{N-K}{N} \right)\]
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Which one of the following pairs of food components in humans reaches the stomach totally undigested?
A)
Starch and cellulose
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B)
Protein and starch
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C)
Starch and fat
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D)
Fat and cellulose
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Which one of the following is a correct matching pair?
A)
Lubb - Sharp closure of AV valves at the beginning of ventricular systole.
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B)
Dup - Sudden opening of semilunar valves at the beginning of ventricular diastole.
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C)
Pulsation of the radial artery valves in the blood vessels.
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D)
Purkinje fibers - Initiation of the heartbeat.
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Proximal and distal convoluted tubules are parts of
A)
Seminiferous tubules
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B)
Nephron
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C)
Oviduct
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D)
Vas deferens
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Which one of the components of ECG in human is correctly interpreted below?
A)
Complex QRS-One complete Pulse
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B)
Peak T - Initiation of total cardiac contraction
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C)
Peak P and Peak R together-Systolic and diastolic blood pressures
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D)
Peak P- Initiation of left atrial contraction only
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Which tube in the accompanying diagram of a heart correctly represents the result of a successful coronary bypass operation?
A)
A
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B)
D
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C)
B
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D)
C
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Deposition of uric acid crystals within the synovial joint causes:
A)
Osteoarthritis
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B)
Rheumatoid arthritis
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C)
Gout
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D)
Paralysis
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Homologous organs are
A)
Wings of Insects and Bat
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B)
Gills of Fish and lungs of Rabbit
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C)
Pectoral fins of Fish and fore limbs of Horse
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D)
Wings of Grosshopper and Crow
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In down's syndrome of a male child, the sex complement is
A)
XO
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B)
45XY
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C)
45 XX
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D)
XXY
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Which one of the following is a freshwater fish?
A)
Catla
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B)
Rohu
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C)
Common carp
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D)
All of these
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Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to
A)
repulsion
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B)
recombination
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C)
linkage
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D)
crossing over
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Jurassic period of the mesozoic era was characterised by
A)
Radiation of reptiles and origin of mammal- like reptiles
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B)
Dinosaurs become extinct and angiosperms appeared
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C)
Flowering plants and first dinosaurs appeared
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D)
Gymnosperms were dominant plants and first birds appeared
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The "Cri-du-Chat" syndrome is caused by change in chromosome structure involving
A)
deletion
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B)
duplication
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C)
inversion
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D)
translocation
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In history of biology, human genome project led to the development of:
A)
biotechnology
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B)
biomonitoring
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C)
bioinformatics
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D)
biosystematics
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Look at the diagram given below.
Parts labelled as 'A', 'B', 'C', 'D' and ' E 'respectively indicate
A)
ilium, femur, tibia, pubis and sacrum
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B)
pubis, tibia, femur, ilium and sacrum
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C)
ilium, femur, tibia, pubis, and sacrum
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D)
pubis, femur, tibia, ilium and sacrum
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Oxygen dissociation curve of haemoglobin is
A)
Sigmoid
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B)
Hyperbolic
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C)
Linear
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D)
Hypobolic
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Which of the following is made up of a single bone in mammal?
A)
Dentary
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B)
Hyoid
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C)
Upper jaw
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D)
All of these
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Intercostal muscles are found attached with
A)
diaphragm
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B)
ribs
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C)
pleura
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D)
lungs
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Eustachian tube connects
A)
External ear with middle ear
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B)
External ear with internal ear
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C)
Middle ear with pharynx
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D)
Internal pharynx
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Match Column-1 with Column-11 and select the correct option from the codes given below.
Colunm-I Column-II A ANF (I) Regulatates blood calcium levels B MSH (II) Decreases blood pressure C GIP (III) Pigmentation D CT (IV) Inhibits gastric secretion
A)
A\[\to \](IV), B\[\to \](I), C\[\to \](II), D\[\to \](III)
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B)
A\[\to \](II), B\[\to \](I), C\[\to \](IV), D\[\to \](III)
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C)
A\[\to \](IV), B\[\to \](I), C\[\to \](III), D\[\to \](II)
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D)
A\[\to \](II), B\[\to \](III), C\[\to \](IV), D\[\to \](I)
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Which one of the following is not a second messenger in hormone action?
A)
Calcium
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B)
Sodium
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C)
cAMP
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D)
cGMP
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A genetically engineered bacteria used for clearing oil spills is:
A)
Escherisechia coli
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B)
Bacillus subtilis
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C)
Agrobacterium tumifaciens
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D)
Pseudomonas putida
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What is true about T-lymphocytes in mammals?
A)
These are produced in thyroid
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B)
There are three main types - cytotoxic T-cells, helper T-cells and suppressor T-cells
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C)
These originate in lymphoid tissues
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D)
They scavenge damaged cells and cellular Debris
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The use of Cannabis products (bhang, ganja, charas, marijuana or hashish) causes
A)
depression of brain activity and feeling of calmness
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B)
alters thoughts, perceptions and feelings
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C)
suppresses brain function and relieves pain
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D)
stimulates the nervous system and increases alterness and activity.
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During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undegraded?
A)
Lipids
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B)
Lignin
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C)
Hemi-cellulose
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D)
Cellulose
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Carcinoma refers to
A)
benign tumours of the connective tissue
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B)
malignant tumours of the connective tissue
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C)
malignant tumours of the skin or mucous membrane
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D)
malignant tumours of the colon
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Atropine is a drug that causes relaxation of the smooth muscle of the digestive tract, a dry mouth sensation, and dilated pupils. Therefore, atropine is a(n)______ drug and mimics the effect of the ______ nervous system.
A)
Adrenergic, parasympathetic
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B)
Adrenergic, sympathetic
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C)
Cholinergic, parasympathetic
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D)
Cholinergic, sympathetic
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African sleeping sickness is due to
A)
Plasmodium vivax transmitted by Tsetse fly
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B)
Trypanosoma lewsii transmitted by Bed Bug
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C)
Trypanosoma gambiense transmitted by Glossina palpalis
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D)
Entamoeba gingivalis spread by Housefly
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Which one of the following are rich in fructose, calcium and some enzymes?
A)
Male accessory glands
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B)
Liver
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C)
Pancreas
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D)
Salivary glands
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The number of floating ribs, in the human body, is
A)
6 pairs
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B)
5 pairs
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C)
3 pairs
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D)
2 pairs
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Which one of the following statements is correct?
A)
Cro-Magnon man's fossil has been found in Ethiopia
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B)
Homo erectus is the ancestor of man
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C)
Neanderthal man is the direct ancestor of
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D)
Homo sapiens Australopithecus is the real ancestor of modern man
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