If the error in the measurement of radius of a sphere is 2%, then the error in the determination of volume of the sphere will be
A)
4%
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B)
6%
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C)
8%
done
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D)
2%
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View Answer play_arrow
A body falls from a height h = 200 m (at New Delhi). The ratio of distance travelled in each \[2\sec \] during\[t=0\] to\[t=6\] seconds of the journey is
A)
1 : 4 : 9
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B)
1 : 2 : 4
done
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C)
1 : 3 : 5
done
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D)
1 : 2 : 3
done
clear
View Answer play_arrow
If \[\left| \vec{A}\times \vec{B} \right|=\sqrt{3}\vec{A}.\vec{B},\]then the value of \[\left| \vec{A}+\vec{B} \right|\]is:
A)
\[{{({{A}^{2}}+{{B}^{2}}+AB)}^{1/2}}\]
done
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B)
\[{{\left( {{A}^{2}}+{{B}^{2}}+\frac{AB}{\sqrt{3}} \right)}^{1/2}}\]
done
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C)
\[A+B\]
done
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D)
\[{{\left( {{A}^{2}}+{{B}^{2}}+\sqrt{3}AB \right)}^{1/2}}\]
done
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View Answer play_arrow
A man weighs 80 kg. He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of\[5m/{{s}^{2}}\]. What would be the reading on the scale?\[(g=10\,m/{{s}^{2}})\]
A)
400 N
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B)
800 N
done
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C)
1200 N
done
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D)
Zero
done
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View Answer play_arrow
A stationary particle explodes into two particles of a masses\[{{m}_{1}}\]and\[{{m}_{2}}\]which move in opposite directions with velocities \[{{v}_{1}}\]and \[{{v}_{2}}.\]The ratio of their kinetic energies\[{{E}_{1}}/{{E}_{2}}\] is
A)
\[{{m}_{1}}/{{m}_{2}}\]
done
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B)
1
done
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C)
\[{{m}_{1}}{{v}_{2}}/{{m}_{2}}{{v}_{1}}\]
done
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D)
\[{{m}_{2}}/{{m}_{1}}\]
done
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View Answer play_arrow
A solid cylinder of mass M and radius R rolls without slipping down an inclined plane of length \[L\] and height h. What is the speed of its centre of mass when the cylinder reaches its bottom
A)
\[\sqrt{\frac{3}{4}gh}\]
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B)
\[\sqrt{\frac{4}{3}gh}\]
done
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C)
\[\sqrt{4\,gh}\]
done
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D)
\[\sqrt{2\,gh}\]
done
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View Answer play_arrow
A round disc of moment of inertia\[{{I}_{2}}\]about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia \[{{I}_{1}}\] rotating with an angular velocity \[\omega \]about the same axis. The final angular velocity of the combination of discs is
A)
\[\frac{{{I}_{2}}\omega }{{{I}_{1}}+{{I}_{2}}}\]
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B)
\[\omega \]
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C)
\[\frac{{{I}_{1}}\omega }{{{I}_{1}}+{{I}_{2}}}\]
done
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D)
\[\frac{({{I}_{1}}+{{I}_{2}})\omega }{{{I}_{1}}}\]
done
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View Answer play_arrow
If the density of a small planet is the same as that of earth, while the radius of the planet is 0.2 times that of the earth, the gravitational acceleration on the surface of that planet is:
A)
0.2 g
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B)
0.4 g
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C)
2 g
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D)
4 g
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View Answer play_arrow
The Earth is assumed to be a sphere of radius R. A platform is arranged at a height R from the surface of the earth. The escape velocity of a body from this platform is \[f{{v}_{e}},\]where \[{{v}_{e}}\]is escape velocity from the surface of the earth is. The value of\[f,\]is
A)
\[\sqrt{2}\]
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B)
\[\frac{1}{\sqrt{2}}\]
done
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C)
\[\frac{1}{3}\]
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D)
\[\frac{1}{2}\]
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View Answer play_arrow
A wire is stretched by 0.01 m by a certain force F. Another wire of the same material whose diameter and length are double to the original wire is stretched by the same force. Then its elongation will be
A)
0.005 m
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B)
0.01 m
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C)
0.02 m
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D)
0.002 m
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View Answer play_arrow
An iceberg of density\[900\text{ }kg/{{m}^{3}}\]is floating in water of density\[1000\text{ }kg/{{m}^{3}}.\] The percentage of volume of ice cube outside the water is
A)
20%
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B)
35%
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C)
10%
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D)
25%
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View Answer play_arrow
A cylindrical rod having temperature\[{{T}_{1}}\]and \[{{T}_{2}}\] at its ends. The rate of flow of heat is \[{{Q}_{1}}\] cal/sec. If all the linear dimensions are doubled keeping temperature constant, then rate of flow of heat \[{{Q}_{2}}\] will be
A)
\[4\,{{Q}_{1}}\]
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B)
\[2\,{{Q}_{1}}\]
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C)
\[\frac{{{Q}_{1}}}{4}\]
done
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D)
\[\frac{{{Q}_{1}}}{2}\]
done
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View Answer play_arrow
A black body radiates 20 W at temperature\[{{227}^{o}}C\]. If temperature of the black body is changed to\[{{727}^{o}}C\], then its radiating power will be:
A)
120 W
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B)
240 W
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C)
320 W
done
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D)
360 W
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View Answer play_arrow
A scientist says that the efficiency of his heat engine which operates at source temperature \[{{127}^{o}}C\] and sink temperature \[{{27}^{o}}C\] is 26%, then
A)
It is impossible
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B)
It is possible but less probable
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C)
It is quite probable
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D)
Data are incomplete
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View Answer play_arrow
A perfect gas at \[{{27}^{o}}C\] is heated at constant pressure to\[{{327}^{o}}C\]. If original volume of gas at \[{{27}^{o}}C\] is V, then volume at \[{{327}^{o}}C\] is
A)
V
done
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B)
3V
done
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C)
2V
done
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D)
VII
done
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View Answer play_arrow
Displacement between maximum potential energy position and maximum kinetic energy position for a particle executing S.H.M. is
A)
\[-a\]
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B)
\[+a\]
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C)
\[\pm \,a\]
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D)
\[\pm \,\frac{a}{4}\]
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View Answer play_arrow
In case of a forced vibration, the resonance wave becomes very sharp when the
A)
restoring force is small
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B)
applied periodic force is small
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C)
quality factor is small
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D)
damping force is small
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View Answer play_arrow
A string of 7m length has a mass of 0.035 kg. If tension in the string is 60.5 N, then speed of a wave on the string is
A)
77 m/s
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B)
102 m/s
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C)
110 m/s
done
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D)
165 m/s
done
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View Answer play_arrow
A whistle revolves in a circle with an angular speed of 20 rad/sec using a string of length 50 cm. If the frequency of sound from the whistle is 385 Hz, then what is the minimum frequency heard by an observer, which is far away from the centre in the same plane? (v = 340 m/s)
A)
333 Hz
done
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B)
374 Hz
done
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C)
385 Hz
done
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D)
394 Hz
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View Answer play_arrow
Cathode rays travelling from east to west enter into region of electric field directed towards north to south in the plane of paper. The deflection of cathode rays is towards
A)
East
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B)
South
done
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C)
West
done
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D)
North
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View Answer play_arrow
A hollow cylinder has a charge q coulomb within it. If\[\phi \]is the electric flux in unit of volt- meter associated with the curved surface B, the flux linked with the plane surface A in unit of voltmeter will be:
A)
\[\frac{1}{2}\left( \frac{q}{{{\varepsilon }_{0}}}-\phi \right)\]
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B)
\[\frac{q}{2{{\varepsilon }_{0}}}\]
done
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C)
\[\frac{\phi }{3}\]
done
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D)
\[\frac{q}{{{\varepsilon }_{0}}}-\phi \]
done
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View Answer play_arrow
The capacity of a parallel plate condenser is \[10\mu F,\]when the distance between its plates is 8 cm. If the distance between the plates is reduced to 4 cm, then the capacity of this parallel plate condenser will be
A)
\[5\,\mu F\]
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B)
\[10\,\mu F\]
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C)
\[20\,\mu F\]
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D)
\[40\,\mu F\]
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View Answer play_arrow
An electric dipole has the magnitude of its charge as q and its dipole moment is p. It is placed in a uniform electric field E. If its dipole moment is along the direction of the field, the force on it and its potential energy are respectively
A)
2qE and minimum
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B)
qE and pE
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C)
zero and minimum
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D)
qE and maximum
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View Answer play_arrow
A voltmeter has a range\[0-V\]with a series resistance R. With a series resistance 2R, the range is\[0-V'.\]The correct relation between V and V? is
A)
\[V'=2V\]
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B)
\[V'>2V\]
done
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C)
\[V'>>2V\]
done
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D)
\[V'<2V\]
done
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View Answer play_arrow
Masses of 3 wires of same metal are in the ratio 1:2:3 and their lengths are in the ratio 3 : 2 : 1. The electrical resistances are in the ratio
A)
1 : 4 : 9
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B)
9 : 4 : 1
done
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C)
1 : 2 : 3
done
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D)
27 : 6 : 1
done
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View Answer play_arrow
Electric bulb 50 W-100 V glowing at full power is to be used in parallel with battery 120 V, \[10\Omega .\]Maximum number of bulbs that can be connected so that they glow in full power is
A)
2
done
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B)
8
done
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C)
4
done
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D)
6
done
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View Answer play_arrow
In India electricity is supplied for domestic use at 220 V. It is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in India is R, the resistance of a 60 W bulb for use in USA will be
A)
R
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B)
2R
done
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C)
\[\frac{R}{4}\]
done
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D)
\[\frac{R}{2}\]
done
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View Answer play_arrow
Lorentz force can be calculated by using the formula
A)
\[\vec{F}=q(\vec{E}+\vec{v}\times \vec{B})\]
done
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B)
\[\vec{F}=q(\vec{E}-\vec{v}\times \vec{B})\]
done
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C)
\[\vec{F}=q(\vec{E}+\vec{v}.\vec{B})\]
done
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D)
\[\vec{F}=q(\vec{E}\times \vec{B}+\vec{v})\]
done
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View Answer play_arrow
A galvanometer acting as a voltmeter will have
A)
a high resistance in parallel with its coil
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B)
a high resistance in series with its coil
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C)
a low resistance in parallel with its coil
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D)
a low resistance in series with its coil
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View Answer play_arrow
The direction of the null points is on the equatorial line of a bar magnet, when the north pole of the magnet is pointing
A)
North
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B)
South
done
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C)
East
done
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D)
West
done
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View Answer play_arrow
If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by\[{{\mu }_{d}},\,{{\mu }_{p}}\]and \[{{\mu }_{f}}\]respectively, then
A)
\[{{\mu }_{d}}\ne 0\]and\[{{\mu }_{f}}\ne 0\]
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B)
\[{{\mu }_{p}}\ne 0\] and \[{{\mu }_{f}}\ne 0\]
done
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C)
\[{{\mu }_{d}}\ne 0\]and \[{{\mu }_{p}}\ne 0\]
done
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D)
\[{{\mu }_{d}}\ne 0\]and\[{{\mu }_{p}}\ne 0\]
done
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View Answer play_arrow
A coil of resistance\[10\Omega \] and an inductance 5 H is connected to a 100 volt battery. Then energy stored in the coil is
A)
125 erg
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B)
125 J
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C)
250 erg
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D)
250 J
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View Answer play_arrow
Two coils of self-inductances 2 mH and 8 mH are placed so close together that the effective flux in one coil is completely linked with the other. The mutual inductance between these coils is
A)
10 mH
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B)
6 mH
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C)
4 mH
done
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D)
16 mH
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View Answer play_arrow
If the value of potential in an AC, circuit is 10 V, then the peak value of potential is
A)
\[\frac{10}{\sqrt{2}}\]
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B)
\[10\sqrt{2}\]
done
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C)
\[20\sqrt{2}\]
done
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D)
\[\frac{20}{\sqrt{2}}\]
done
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View Answer play_arrow
The core of a transformer is laminated be- Cause
A)
energy losses due to Eddy currents may be minimised
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B)
the weight of the transformer may be reduced
done
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C)
rusting of the core may be prevented
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D)
ratio of voltage in primary and secondary may be increased
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View Answer play_arrow
Which of the following shows greenhouse effect?
A)
Ultraviolet rays
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B)
Infrared rays
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C)
X-rays
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D)
None of these
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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)
\[\sqrt{\frac{{{\varepsilon }_{0}}}{{{\mu }_{0}}}}\]
done
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B)
\[\sqrt{{{\mu }_{0}}{{\varepsilon }_{0}}}\]
done
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C)
\[\sqrt{\frac{1}{\sqrt{{{\mu }_{0}}{{\varepsilon }_{0}}}}}\]
done
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D)
\[\sqrt{\frac{{{\mu }_{0}}}{{{\varepsilon }_{0}}}}\]
done
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View Answer play_arrow
Four lenses of focal length +15 cm, +20 cm, +150 cm and +250 cm are available for making an astronomical telescope. To produce the largest magnification, the focal length of the eye-piece should be
A)
+15 cm
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B)
+20 cm
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C)
+150 cm
done
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D)
+250 cm
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View Answer play_arrow
An object is at a distance of 0.5 m in front of a plane mirror. Distance between the object and image is
A)
0.5 m
done
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B)
1 m
done
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C)
0.25 m
done
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D)
1.5 m
done
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View Answer play_arrow
If two light waves having the same frequency have intensity ratio 4 : 1 and they interfere, the ratio of maximum to minimum intensity in the pattern will be
A)
9 : 1
done
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B)
3 : 1
done
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C)
25 : 9
done
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D)
16 : 25
done
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View Answer play_arrow
In Young's double-slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths\[{{\lambda }_{1}}=12000\,\overset{\text{o}}{\mathop{\text{A}}}\,\]and\[{{\lambda }_{2}}=10000\overset{\text{o}}{\mathop{\text{A}}}\,\]. At what minimum distance from the common central bright fringe on the screen 2 m from the slit will a bright fringe from one interference pattern coincide with a bright fringe from the other?
A)
8 mm
done
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B)
6 mm
done
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C)
4 mm
done
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D)
3 mm
done
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View Answer play_arrow
Two identical metal plates show photoelectric effect by a light of wavelength\[{{\lambda }_{A}}\]falls on plate A and\[{{\lambda }_{B}}\]on plate\[B({{\lambda }_{A}}=2{{\lambda }_{B}}).\]The maximum kinetic energy is
A)
\[2{{K}_{A}}={{K}_{B}}\]
done
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B)
\[{{K}_{A}}<{{K}_{B}}/2\]
done
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C)
\[{{K}_{A}}=2{{K}_{B}}\]
done
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D)
\[{{K}_{A}}={{K}_{B}}/2\]
done
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View Answer play_arrow
The work function of a metal is 4.2 eV, its threshold wavelength will be
A)
\[4000\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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B)
\[~3500\text{ }\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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C)
\[~2955\text{ }\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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D)
\[~2500\text{ }\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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View Answer play_arrow
In Bohr's model, the atomic radius of the first orbit is \[{{r}_{0}},\]then the radius of the third orbit is
A)
\[\frac{{{r}_{0}}}{9}\]
done
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B)
\[{{r}_{0}}\]
done
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C)
\[9{{r}_{0}}\]
done
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D)
\[3{{r}_{0}}\]
done
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View Answer play_arrow
The frequency of 1st line of Balmer series in \[{{H}_{2}}\]atom is \[{{v}_{0}}.\]The frequency of line emitted by singly ionised He atom is
A)
\[2{{v}_{0}}\]
done
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B)
\[4{{v}_{0}}\]
done
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C)
\[{{v}_{0}}/2\]
done
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D)
\[{{v}_{0}}/4\]
done
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View Answer play_arrow
Molarity of liquid HCl with density equal to g/mL is:
A)
36.5
done
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B)
18.25
done
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C)
32.05
done
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D)
4.65
done
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View Answer play_arrow
Which of the following is isoelectronic?
A)
\[C{{O}_{2}},N{{O}_{2}}\]
done
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B)
\[NO_{2}^{-},C{{O}_{2}}\]
done
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C)
\[C{{N}^{-}},CO\]
done
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D)
\[S{{O}_{2}},C{{O}_{2}}\]
done
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View Answer play_arrow
Among K, Ca, Fe and Zn, the element which can form more than one binary compound with chlorine is:
A)
Fe
done
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B)
Zn
done
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C)
K
done
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D)
Ca
done
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View Answer play_arrow
Which one of the following molecules will form a linear polymeric structure due to H-bonding?
A)
HCl
done
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B)
HF
done
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C)
\[{{H}_{2}}O\]
done
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D)
\[~N{{H}_{3}}\]
done
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View Answer play_arrow
The surface tension of which of the following liquid is maximum?
A)
\[{{C}_{2}}{{H}_{5}}OH\]
done
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B)
\[C{{H}_{3}}OH\]
done
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C)
\[{{H}_{2}}O\]
done
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D)
\[{{C}_{6}}{{H}_{6}}\]
done
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View Answer play_arrow
\[Pb{{O}_{2}}\xrightarrow{{}}pbO,\Delta {{G}_{298}}<0\]\[Sn{{O}_{2}}\xrightarrow{{}}SnO,\Delta {{G}_{298}}>0\]. Most probable oxidation states of Pb and Sn will be
A)
\[P{{b}^{4+}}+S{{n}^{4+}}\]
done
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B)
\[P{{b}^{4+}}+S{{n}^{2+}}\]
done
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C)
\[P{{b}^{2+}},S{{n}^{2+}}\]
done
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D)
\[P{{b}^{2+}},S{{n}^{4+}}\]
done
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View Answer play_arrow
Heat of combustion\[\Delta {{H}^{o}}\]for\[C(s),{{H}_{2}}(g)\]and \[C{{H}_{4}}(g)\]are -94, -68 and -213 kcal/mol. Then \[\Delta {{H }^{o}}\] for \[C(s)+2{{H}_{2}}(g)\Delta C{{H}_{4}}(g)\]is
A)
-17 kcal
done
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B)
-111 kcal
done
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C)
-170 kcal
done
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D)
-85 kcal
done
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View Answer play_arrow
Reaction\[Ba{{O}_{2}}(s)\rightleftharpoons BaO(s)+{{O}_{2}}(g);\Delta H =+ve\]. In equilibrium condition, pressure of 02 depends on
A)
increased mass of \[Ba{{O}_{2}}\]
done
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B)
increased mass of BaO
done
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C)
increased temperature of equilibrium
done
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D)
increased mass of\[Ba{{O}_{2}}\]and BaO both
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View Answer play_arrow
If the concentration of\[O{{H}^{-}}\]ions in the reaction\[Fe{{(OH)}_{3}}(s)\rightleftharpoons F{{e}^{3+}}(aq)+3\bar{O}H\]is decreased to \[\frac{1}{4}\] times, then equilibrium concentration of \[F{{e}^{3+}}\] will be increased to:
A)
16 times
done
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B)
64 times
done
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C)
4 times
done
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D)
8 times
done
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View Answer play_arrow
Solubility of\[{{M}_{2}}S\]type salt is \[3.5\times {{10}^{-6}},\] then find out its solubility product
A)
\[1.7\times {{10}^{-6}}\]
done
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B)
\[1.7\times {{10}^{-16}}\]
done
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C)
\[1.7\times {{10}^{-18}}\]
done
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D)
\[1.7\times {{10}^{-12}}\]
done
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View Answer play_arrow
The solubility product of a sparingly soluble salt \[A{{X}_{2}}\]is \[3.2\times {{10}^{-11}}.\] Its solubility (in mol/L) is
A)
\[5.6\times {{10}^{-6}}\]
done
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B)
\[3.1\times {{10}^{-4}}\]
done
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C)
\[2\times {{10}^{-4}}\]
done
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D)
\[4\times {{10}^{-4}}\]
done
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View Answer play_arrow
In which of the following compounds, nitrogen exhibits the highest oxidation state?
A)
\[{{N}_{3}}H\]
done
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B)
\[~N{{H}_{2}}OH\]
done
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C)
\[~{{N}_{2}}{{H}_{4}}\]
done
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D)
\[~N{{H}_{3}}\]
done
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View Answer play_arrow
The pair of compounds that can exist together is
A)
\[FeC{{l}_{3}},SnC{{l}_{2}}\]
done
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B)
\[HgC{{l}_{2}},SnC{{l}_{2}}\]
done
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C)
\[FeC{{l}_{2}},SnC{{l}_{2}}\]
done
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D)
\[FeC{{l}_{3}},KI\]
done
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View Answer play_arrow
At its melting point ice is lighter than water because
A)
\[{{H}_{2}}O\]molecules are more closely packed in solid state
done
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B)
Ice crystals have hollow hexagonal arrangement of \[{{H}_{2}}O\]molecules
done
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C)
On melting of ice the \[{{H}_{2}}O\]molecule shrinks in size
done
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D)
Ice forms mostly heavy water on first melting
done
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View Answer play_arrow
The volume strength of \[1.5\,N\,{{H}_{2}}{{O}_{2}}\] solution is
A)
4.8 L
done
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B)
5.2 L
done
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C)
8.4 L
done
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D)
8.8 L
done
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View Answer play_arrow
Which of the statements is not true?
A)
\[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] solution in acidic medium is orange
done
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B)
\[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] solution becomes yellow on increasing the pH beyond 7
done
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C)
On passing H2S through acidified \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]solution, a milky color is observed
done
clear
D)
\[N{{a}_{2}}C{{r}_{2}}{{O}_{7}}\]is preferred over\[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]in volumetric analysis
done
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View Answer play_arrow
A solid compound 'X' on heating gives \[C{{O}_{2}}\]gas and a residue. The residue mixed with water forms 'Y' on passing an excess of \[C{{O}_{2}}\]through 'Y' in water, a clear solution 'Z' is obtained. On boiling 'Z' compound, 'X' is reformed. The compound 'X' is
A)
\[Ca{{(HC{{O}_{3}})}_{2}}\]
done
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B)
\[CaC{{O}_{3}}\]
done
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C)
\[N{{a}_{2}}C{{O}_{3}}\]
done
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D)
\[{{K}_{2}}C{{O}_{3}}\]
done
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View Answer play_arrow
Which of the following structure is similar to graphite?
A)
B
done
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B)
\[{{B}_{4}}C\]
done
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C)
\[{{B}_{2}}{{H}_{6}}\]
done
clear
D)
BN
done
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View Answer play_arrow
Which property is common in diamond and graphite?
A)
Electrical conductivity
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B)
Crystal structure
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C)
Relative atomic mass
done
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D)
Density
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View Answer play_arrow
The most suitable method of separation of 1:1 mixture of ortho and para nitrophenols is:
A)
distillation
done
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B)
crystallization
done
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C)
sublimation
done
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D)
chromatography
done
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View Answer play_arrow
An organic compound contains carbon, hydro- gen and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67%. The empirical formula of the compound would be:
A)
\[C{{H}_{2}}O\]
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B)
CHO
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C)
\[C{{H}_{4}}O\]
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D)
\[C{{H}_{3}}O\]
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View Answer play_arrow
The most stable carbocation is
A)
\[\overset{+}{\mathop{C}}\,{{H}_{3}}\]
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B)
\[C{{H}_{3}}\overset{+}{\mathop{C}}\,{{H}_{2}}\]
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C)
\[{{(C{{H}_{3}})}_{2}}\overset{+}{\mathop{C}}\,H\]
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D)
\[{{(C{{H}_{3}})}_{3}}\overset{+}{\mathop{C}}\,\]
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View Answer play_arrow
A)
[c] > (2) > (1)
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B)
[a] > (3) > (2)
done
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C)
[a] > (2) > (3)
done
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D)
[b] > (1) > (3)
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Which one of the following pairs represent; stereoisomerism?
A)
Structural and geometrical isomerism
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B)
Linkage and geometrical isomerism
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C)
Chain and rotational isomerism
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D)
Optical and geometrical isomerism
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View Answer play_arrow
How many stereoisomers does this molecule has? \[C{{H}_{3}}CH=CHC{{H}_{2}}CHBrC{{H}_{3}}\]
A)
6
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B)
8
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C)
4
done
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D)
2
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View Answer play_arrow
In preparation of alkene from alcohol using \[A{{l}_{2}}{{O}_{3}}\]which is effective factor?
A)
Temperature
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B)
Concentration
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C)
Surface area of\[A{{l}_{2}}{{O}_{3}}\]
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D)
Porosity of \[A{{l}_{2}}{{O}_{3}}\]
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View Answer play_arrow
Reaction of HBr with propene in the presence of peroxides gives
A)
isopropyi bromide
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B)
3-bromopropane
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C)
allyl bromide
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D)
n-propyl bromide
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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
Roasting of sulphides gives the gas X as a byproduct. This is a colorless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as it results in acid rain. Its aqueous solution is acidic and acts as a reducing agent, and its acid has never been isolated. The gas X is
A)
\[S{{O}_{2}}\]
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B)
\[C{{O}_{2}}\]
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C)
\[S{{O}_{3}}\]
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D)
\[{{H}_{2}}S\]
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View Answer play_arrow
In the nuclear change \[{{\,}_{92}}{{U}^{235}}+{{\,}_{0}}{{n}^{1}}\xrightarrow{{}}\] Fission products + neutron + \[3.20\times {{10}^{-11}}\,J,\] the energy released when 1 g of\[{{\,}_{92}}{{U}^{235}}\]finally undergoes fission is
A)
\[12.75\times {{10}^{8}}\,kJ\]
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B)
\[18.60\,\times {{10}^{9}}kJ\]
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C)
\[8.21\times {{10}^{7}}\,kJ\]
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D)
\[6.55\times {{10}^{6}}\,kJ\]
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View Answer play_arrow
The radioisotope \[\,_{27}^{60}Co\]used in the treatment of cancer can be made by \[(n,p)\] reaction. For this reaction, the target nucleus is
A)
\[_{28}^{59}Ni\]
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B)
\[_{27}^{59}Ni\]
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C)
\[_{28}^{60}Ni\]
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D)
\[_{27}^{60}Ni\]
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View Answer play_arrow
When molten zinc is cooled to solid state it assumes hcp structure. Then the number of nearest neighbours of zinc atom will be
A)
4
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B)
6
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C)
8
done
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D)
12
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View Answer play_arrow
Which of the following statements is not correct?
A)
Molecular solids are generally volatile
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B)
The number of carbon atoms in an unit cell of diamond is 4
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C)
The number o Bravais lattices in which a crystal can be categorized is 14
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D)
The faction of the total volume occupied by the atoms in a primitive cell is 0.48
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View Answer play_arrow
A solution has a 1 : 4 mole ratio of pentane to hexane. The vapour pressures of pure hydrocarbons at \[20{}^\circ C\] are 440 mm Hg for pentane and 120 mm Hg for hexane. The mole fraction of pentane in vapour phase would be:
A)
0.786
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B)
0.478
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C)
0.549
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D)
0.200
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View Answer play_arrow
A solution containing 10 g per dm3 of urea (molar mass = 60) is isotonic with a 5% (mass by vol.) solution of a non-volatile solute. The molar mass (in g\[mo{{l}^{-1}}\]) of non-volatile solute is
A)
350
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B)
300
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C)
250
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D)
200
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View Answer play_arrow
Electrode potential of \[Z{{n}^{2+}}/Zn\]is -0.76 V and that of \[C{{u}^{2+}}/Cu\]is +0.34 V. The EMF of the cell constructed between these two electrodes is
A)
1.10 V
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B)
0.42 V
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C)
-1.1 V
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D)
-0.42 V
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View Answer play_arrow
The standard electrode potential of the half cells is given below:
\[Z{{n}^{2+}}+2{{e}^{-}}\xrightarrow{{}}Zn;E=-7.62\,V,\] \[F{{e}^{2+}}+2{{e}^{-}}\xrightarrow{{}}Fe;E=-7.81\,V,\] The emf of the cell \[F{{e}^{2+}}+Zn\xrightarrow{{}}Z{{n}^{2+}}+Fe\]is
A)
1.54 V
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B)
-1.54 V
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C)
-0.19 V
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D)
+0.19 V
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View Answer play_arrow
The given reaction \[2NO+{{O}_{2}}\to 2N{{O}_{2}}\] is an example of
A)
first-order reaction
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B)
second-order reaction
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C)
third-order reaction
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D)
none of these
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View Answer play_arrow
If the rate of the reaction is equal to the rate constant, the order of the reaction is
A)
3
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B)
0
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C)
1
done
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D)
2
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View Answer play_arrow
If \[x\]is amount of adsorbate and m is amount of adsorbent, which of the following relations is related to adsorption process?
A)
\[x/m=P\times T\]
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B)
\[x/m=f(P)\]at constant T
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C)
\[x/m=f(T)\] at constant P
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D)
\[P=f(T)\] at constant \[(x/m)\]
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View Answer play_arrow
Catalyst
A)
lowers activation energy
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B)
increases activation energy
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C)
may increase or may decrease activation energy
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D)
brings out equilibrium
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View Answer play_arrow
Which one of the following ores is a chloride?
A)
Horn silver
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B)
Zincite
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C)
Bauxite
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D)
Felspar
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View Answer play_arrow
Which of the following is not an ore of magnesium?
A)
Magnesite
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B)
Dolomite
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C)
Gypsum
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D)
Carnalite
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View Answer play_arrow
Which one has the highest percentage of nitro-gen?
A)
Urea
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B)
Ammonium sulphate
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C)
Ammonium nitrate
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D)
Calcium nitrate
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View Answer play_arrow
\[{{H}_{3}}P{{O}_{2}}\]has the name and basicity respectively:
A)
phosphorus acid and two
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B)
hypophosphorus acid and two
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C)
hypophosphorus acid and one
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D)
hypophosphoric acid and two
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View Answer play_arrow
In five kingdom system, the main basis of classification is:
A)
Structure of nucleus
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B)
Nutrition
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C)
Structure of cell wall
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D)
Asexual reproduction
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View Answer play_arrow
Plants reproducing by spores such as mosses and ferns are grouped under the general term:
A)
Cryptogams
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B)
Bryophytes
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C)
Sporophytes
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D)
Thallophytes
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View Answer play_arrow
ICBN stands for:
A)
Indian Code of Botanical Nomenclature
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B)
Indian Congress of Biological Names
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C)
International code of Botanical Nomenclature
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D)
International Congress of Biological Names
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View Answer play_arrow
Cauliflower mosaic virus contains:
A)
ss RNA
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B)
ds RNA
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C)
ds DNA
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D)
ss DNA
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View Answer play_arrow
Extranuclear inheritance occurs in:
A)
Killer paramaecium
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B)
Killer Amoeba
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C)
Euglena
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D)
Hydra
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View Answer play_arrow
In bacteria, plasmid is:
A)
Extra chromosomal material
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B)
Main DNA
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C)
Nonfunctional DNA
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D)
Repetitive gene
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View Answer play_arrow
In a moss the sporophyte
A)
is partially parasitic on the gametophyte
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B)
produces gametes that given rise to the Gametophyte
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C)
Arises from a spore produced from the gametophyte
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D)
Manufactures food for itself, as well as for the gametophyte
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View Answer play_arrow
If you are asked to classify the various algae into distinct groups, which of the following characters you should choose?
A)
Chemical composition of the cell wall
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B)
Types of pigments present in the cell
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C)
Nature of stored food materials in the cell
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D)
Structural organization of thallus
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View Answer play_arrow
In which one of the following, male and female gametophytes do not have free-living independent existence?
A)
Polytrichum
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B)
Cedrus
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C)
Pteris
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D)
Funaria
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View Answer play_arrow
In which of the following notochord is present in embryonic stage:
A)
All chordates
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B)
Some chordates
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C)
Vertebrates
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D)
Non-chordates
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View Answer play_arrow
Ommatidia serve the purpose of photoreception in:
A)
Cockroach
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B)
Frog
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C)
Humans
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D)
Sunflower
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View Answer play_arrow
The animals with bilateral symmetry in young stage and radial pentamerous symmetry in the adult stage, belong to the phylum:
A)
Mollusca
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B)
Cnidaria
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C)
Echinodermata
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D)
Annelida
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View Answer play_arrow
Which is correct pair for edible part?
A)
Tomato - Thalamus
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B)
Maize - Cotyledons
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C)
Guava - Mesocarp
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D)
Date palm - Pericarp
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View Answer play_arrow
The aleurone layer in maize grain is specially
A)
Proteins
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B)
Starch
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C)
Lipids
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D)
Auxins
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View Answer play_arrow
The filamentous threads protruding at the end young cob of maize are
A)
Anthers
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B)
Styles
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C)
Ovaries
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D)
Hairs
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View Answer play_arrow
Axillary bud and terminal bud derived from the activity of:
A)
Lateral meristem
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B)
Intercalary meristem
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C)
Apical meristem
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D)
Parenchyma
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View Answer play_arrow
The apical meristem of the root is present:
A)
Only in radicals
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B)
Only in tap roots
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C)
Only in adventitious roots
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D)
In all the rook
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View Answer play_arrow
In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues:
A)
Stem and root
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B)
All parts
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C)
Shoot tips and root tips
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D)
Flowers, fruit and leaves
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View Answer play_arrow
Which cells do not form layer and remains structurally separate?
A)
Epithelial cells
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B)
Muscle cells
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C)
Nerve cells
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D)
Gland cells
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View Answer play_arrow
Bowman's glands are found in
A)
Olfactory epithelium
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B)
External auditory canal
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C)
Cortical nephrons only
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D)
Juxtamedullary nephrons
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View Answer play_arrow
The kind of tissue that forms the supportive structure in our pinna (external ears) is also found in:
A)
Tip of the nose
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B)
Vertebrae
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C)
Nails
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D)
Ear ossicles
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View Answer play_arrow
Microtubules are absent in
A)
Mitochondria
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B)
Flagella
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C)
Spindle fibres
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D)
Centriole
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View Answer play_arrow
In which one of the following, nitrogen is not a constituent?
A)
Idioblast
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B)
Bacteriochlorophyll
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C)
Invertase
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D)
Pepsin
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View Answer play_arrow
According to widely accept "fluid mosaic model" cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements are incorrect:
A)
Proteins can also undergo flip-flop movements in the lipid bilayer
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B)
Many proteins remain completely embedded within the lipid bilayer
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C)
Proteins in cell membranes can travel within the lipid bilayer
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D)
Proteins can remain confined within certain domains of the membranes
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View Answer play_arrow
Most abundant organic compound on earth is:
A)
Protein
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B)
Cellulose
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C)
Lipids
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D)
Steroids
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View Answer play_arrow
Lipids are insoluble in water because lipids molecules are:
A)
Hydrophilic
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B)
Hydrophobic
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C)
Neutral
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D)
Zwitter ions
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View Answer play_arrow
Which of the following is the simplest amino acid?
A)
Alanine
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B)
Asparagine
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C)
Glycine
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D)
Tyrosine
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View Answer play_arrow
If a diploid cell is treated with colchicine, then it becomes:
A)
Triploid
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B)
Tetraploid
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C)
Diploid
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D)
Monoploid
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View Answer play_arrow
If you are provided with root-tips of onion in your class and are asked to count the chromosomes which of the following stages can you most conveniently look into:
A)
Telophase
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B)
Anaphase
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C)
Prophase
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D)
Metaphase
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View Answer play_arrow
Synapsis occurs between:
A)
two homolog chromosomes
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B)
a male and a female gamete
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C)
mRNA and ribosomes
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D)
spindle fibres and centromere
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View Answer play_arrow
When water moves through a semipermeable membrane, then which of the following pressure develops?
A)
OP
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B)
SP
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C)
TP
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D)
WP
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View Answer play_arrow
Potometer works on the principle of:
A)
Potential difference between the tip of the tube and that of the plant
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B)
Amount of water absorbed equals the amount transpired
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C)
Osmotic pressure
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D)
Root pressure
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View Answer play_arrow
The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of:
A)
weak gravitational pull
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B)
transpiration pull
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C)
lignified thick walls
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D)
cohesion and adhesion
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View Answer play_arrow
In plants inulin and pectin are:
A)
Reserved material
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B)
Wastes
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C)
Excretory material
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D)
Insect attracting material
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View Answer play_arrow
Boron in green plants assists in:
A)
Activation of enzymes
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B)
Acting of enzyme cofactor
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C)
Photosynthesis
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D)
Sugar transport
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View Answer play_arrow
The major role of minor elements inside living organisms is to act as:
A)
co-factors of enzymes
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B)
Building blocks of important amino acids
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C)
Constituent of hormones
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D)
Binder of cell structure
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View Answer play_arrow
Which pair is wrong?
A)
\[{{C}_{3}}-\]Maize
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B)
\[{{C}_{4}}-\]Kranz anatomy
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C)
Calvin cycle - PGA
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D)
Hatch and Slake cycle -O.A.A.
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View Answer play_arrow
Which element is located at the centre of the porphyrin ring in chlorophyll?
A)
Calcium
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B)
Magnesium
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C)
Potassium
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D)
Manganese
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View Answer play_arrow
Photosynthesis in\[{{C}_{4}}\]plants is relatively less limited by atmospheric\[C{{O}_{2}}\]levels because:
A)
The primary fixation of\[C{{O}_{2}}\]is mediated via PEP carboxylase
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B)
Effective pumping of \[C{{O}_{2}}\]into bundle sheath cells
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C)
Four carbon acids are the primary initial\[C{{O}_{2}}\] fixation products
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D)
Rubisco in\[{{C}_{4}}\]plants has higher Inanity for \[C{{O}_{2}}\]
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View Answer play_arrow
In which one of the following do the two names refer to one and the same thing:
A)
Krebs cycle and Calvin cycle
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B)
Tricarboxylic acid cycle and citric acid Cycle
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C)
Citric acid cycle and Calvin cycle
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D)
Tricarboxylic acid cycle and urea cycle
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View Answer play_arrow
In glycolysis, during oxidation electrons are removed by:
A)
Glyceraldehyde-3 -phosphate
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B)
\[~NA{{D}^{+}}\]
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C)
Molecular oxygen
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D)
ATP
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View Answer play_arrow
The overall goal of glycolysis, Krebs cycle and the electron transport system is the formation of:
A)
Nucleic acids
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B)
ATP in small stepwise units
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C)
ATP in one large oxidation reaction
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D)
Sugars
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View Answer play_arrow
Proteinaceous pigment which control the activities concerned with light:
A)
Phytochrome
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B)
Chlorophyll
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C)
Anthocyanin
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D)
Carotenoids
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View Answer play_arrow
Seed dormancy is due to the:
A)
Ethylene
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B)
Abscisic acid
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C)
IAA
done
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D)
Starch
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View Answer play_arrow
One set of a plant was grown at 12 hours day and 12 hours night period cycles and it flowered while in the other set night phase was interrupted by flash of light and it did not produce flower. Under which one of the following categories will you place this plant?
A)
Darkness neutral
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B)
Day neutral
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C)
Short day
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D)
Long day
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View Answer play_arrow
Hydrolytic enzymes which act on low pH are called:
A)
Protease
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B)
a-Amylase
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C)
Hydrolases
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D)
Peroxidase
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View Answer play_arrow
Duodenum has characteristic Brunner's glands which secrete two hormones called
A)
Secretin, cholecystokinin
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B)
Prolactin, parathormone
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C)
Extradiol, progesterone
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D)
Kinase, estrogen
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View Answer play_arrow
Examination of blood of a person suspected of having anemia shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following is likely to alleviate his symptoms?
A)
Thiamine
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B)
Folic acid and cobalamin
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C)
Riboflavin
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D)
Iron compounds
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View Answer play_arrow
Which one of the following statements is incorrect?
A)
The residual air in lungs slightly decreases the efficiency of respiration in mammals
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B)
The presence of non-respiratory air sacs, increases the efficiency of respiration in birds
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C)
In insects, circulating body fluids serve to distribute oxygen to tissues
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D)
The principle of countercurrent flow facilitates efficient respiration in gills of fishes
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View Answer play_arrow
A large proportion of oxygen is left unused in the human blood even after its uptakes by the body tissues. This \[{{O}_{2}}:\]
A)
helps in releasing more\[{{O}_{2}}\]to the epithelial tissues
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B)
acts as a reserve during muscular exercise
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C)
raises the\[pC{{O}_{2}}\]of blood to 75 mm of Hg
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D)
is enough to keep oxyhaemoglobin saturation at 96%
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View Answer play_arrow
People who have migrated from the planes to an area adjoining Rohtang Pass about six months back:
A)
Suffer from altitude sickness with symp- toms like nausea, fatigue, etc.
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B)
Have the usual RBC count but their hae- moglobin has very high binding affinity to\[{{O}_{2}}\]
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C)
Have more RBCs and their haemoglobin has a lower binding affinity to\[{{O}_{2}}\]
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D)
Are not physically fit to play games like football
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View Answer play_arrow
Sickle cell anaemia is due to:
A)
Change of amino acid in\[\alpha -\]chain of hae- moglobin
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B)
Change of amino acid in\[\beta -\]chain of haemoglobin
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C)
Change of amino acid in both\[\alpha \]and \[\beta \]chain of haemoglobin
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D)
Change of amino acid either\[\alpha \]or\[\beta \]chain of haemoglobin
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View Answer play_arrow
Bundle of His is a network of:
A)
Muscle fibres distributed throughout the heart walls
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B)
Muscle fibres found only in the ventricle wall
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C)
Nerve fibres distributed in ventricles
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D)
Nerve fibres found throughout the heart
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View Answer play_arrow
In humans, blood passes from the post caval to the diastolic right atrium of heart due to:
A)
stimulation of the sino auricular node
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B)
pressure difference between the post caval and atrium
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C)
pushing open of the venous valves
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D)
suction pull
done
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View Answer play_arrow
In Hydra, waste material of food digestion and nitrogenous waste material removed from:
A)
Mouth and mouth
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B)
Body wall and body wall
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C)
Mouth and body wall
done
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D)
Mouth and tentacles
done
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View Answer play_arrow
In omithine cycle which of the following wastes are removed from the blood:
A)
\[C{{O}_{2}}\]and ammonia
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B)
Ammonia and urea
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C)
\[C{{O}_{2}}\]and urea
done
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D)
Urea and urine
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What will happen if the stretch receptors of the urinary bladder wall are totally removed?
A)
There will be no micturition
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B)
Urine will continue to collect normally in bladder
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C)
Micturition will continue
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D)
Urine will not collect in the bladder
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What will happen if ligaments are cut or bro- ken?
A)
Bones will move freely at joints
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B)
No movement at joint
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C)
Bone will become unfix
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D)
Bone will become fixed
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Elbow joint is an example of:
A)
Ball and socket joint
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B)
Pivot joint
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C)
Hinge joint
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D)
Gliding joint
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Which of the following is not a function of the skeletal system?
A)
Locomotion
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B)
Production of erythrocytes
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C)
Storage of minerals
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D)
Production of body heat
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Characteristics character of human cornea is:
A)
Secreted by conjurctiva and glandular
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B)
It has lacrimal gland which secrete tears
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C)
Blood circulation is absent in cornea
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D)
In old age it become harden and white layer deposit on it which causes the cataract
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In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive:
A)
\[{{K}^{+}}\]and\[N{{a}^{+}}\]out of the cell
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B)
\[N{{a}^{+}}\]into the cell
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C)
\[N{{a}^{+}}\]out of the cell
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D)
\[{{K}^{+}}\]into the cell
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Bowman's glands are found in:
A)
Olfactory epithelium
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B)
External auditory canal
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C)
Cortical nephrons only
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D)
Juxtamedullary nephrons
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Which steroid is used for transformation?
A)
Cortisol
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B)
Cholesterol
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C)
Testosterone
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D)
Progesterone
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Melanin protect from:
A)
UV rays
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B)
Visible rays
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C)
Infrared rays
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D)
X-rays
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Which one of the following does not act as a neurotransmitter?
A)
Acetylcholine
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B)
Epinephrine
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C)
Norepinephrine
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D)
Cortisone
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What is true for cleavage?
A)
Size of embryo increase
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B)
Size of cells decrease
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C)
Size of cells increase
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D)
Size of embryo decrease
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Which one of the following is correctly matched?
A)
Chlamydomonas - Conidia
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B)
Yeast - Zoospores
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C)
Onion-Bulb
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D)
Ginger - Sucker
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Monoecious plant of Chara shows occurrence of:
A)
Antheridiophore and archegoniophore on the same plant
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B)
Stamen and carpel on the same plant
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C)
Upper antheridium and lower oogonium on the same plant
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D)
Upper oogonium and lower antheridium on the same plant
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Anemophily type of pollination is found in:
A)
Salvia
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B)
Bottle brush
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C)
Vallisneria
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D)
Coconut
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What is the direction of micropyle in anatropous ovule?
A)
Upward
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B)
Downward
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C)
Right
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D)
Left
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In which pair both the plants can be vegetatively propagated by leaf pieces:
A)
Bryophyllum and Kalanchoe
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B)
Agave and Kalanchoe
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C)
Asparagus and Bryophyllum
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D)
Chrysanthemum and Agave
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Grey crescent is the area:
A)
At the point of entry of sperm into ovum
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B)
Just opposite to the site of entry of sperm into ovum
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C)
At the animal pole
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D)
At the vegetal pole
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Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus?
A)
Yolk sac
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B)
Amnion
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C)
Chorion
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D)
Allantois
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Foetal ejection reflex in human female is induced by:
A)
Differentiation of mammary glands
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B)
Pressure exerted by amniotic fluid
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C)
Release of oxytocin from pituitary
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D)
Fully developed foetus and placenta
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Cu ions released from copper-releasing intra- uterine devices (lUDs):
A)
make uterus unsuitable for implantation
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B)
increase phagocytosis of sperms
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C)
suppress sperm motility
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D)
prevent ovulation
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The test-tube baby programme employs which one of the mowing techniques?
A)
Gamete intra fallopian transfer (GIFT)
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B)
Zygote intra fallopian transfer (ZIFT)
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C)
Intra cytoplasmic sperm injection (ICSI)
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D)
Intrauterine insemination (IUI)
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Assisted reproductive technology, IVF involves transfer of:
A)
Ovum into the fallopian tube
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B)
Zygote into the fallopian tube
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C)
Zygote into the uterus
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D)
Embryo with 16 blastomeres into the fal- lopian tube
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A and B genes are linked. What shall be genotype of progeny in a cross between AB/ab and ab/ab:
A)
AAbb and aabb
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B)
AaBb and aabb
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C)
AABB and aabb
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D)
None
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Ratio of complementary genes is:
A)
9 : 3 : 4
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B)
12 : 3 : 1
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C)
9 : 3 : 3 : 4
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D)
9 : 7
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There are three genes a, b and c. The percentage of crossing over between a and b is 20%, b and c is 28% and a and c is 8%. What is the sequence of genes on chromosome?
A)
b, a, c
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B)
a, b, c
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C)
a, c, b
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D)
None
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At the time of organogenesis genes regulate the process at different levels and at different time due to:
A)
Promoter
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B)
Regulator
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C)
Intron
done
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D)
Exon
done
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Exon part of m-RNAs have code for:
A)
Protein
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B)
Lipid
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C)
Carbohydrate
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D)
Phospholipid
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In E. coli, during lactose metabolism represser binds to:
A)
Regulator gene
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B)
Operator gene
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C)
Structural gene
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D)
Promoter gene
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Half-life period of\[{{C}^{14}}\]is:
A)
500 years
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B)
5000 years
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C)
50 years
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D)
\[5\times {{10}^{4}}\]years
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According to fossils which discovered up to present time, origin and evolution of man was started from which country
A)
France
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B)
Java
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C)
Africa
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D)
China
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Sequence of which of the following is used to know the phylogeny:
A)
m-RNA
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B)
r-RNA
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C)
t-RNA
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D)
DNA
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Which statement correct about centre of origin of plant?
A)
More diversity in improved variety
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B)
Frequency of dominant gene is more
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C)
Climatic condition more favourable
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D)
None
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Which one of the following is correct match?
A)
Reserpine - Tranquilliser
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B)
Cocaine - opiatic narcotic
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C)
Morphine - Hallucinogenic
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D)
Bhang-Analgesic
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Short-lived immunity acquired from mother to foetus across placenta or through mother's milk to the infant is categorised as:
A)
Active immunity
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B)
Passive immunity
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C)
Cellular immunity
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D)
Innate non-specific immunity
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