The flux linked with a coil at any instant t is given by\[\phi =10{{t}^{2}}-50t+250.\] The induced emf at t = 3 s is
A)
10 V
done
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B)
190 V
done
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C)
-190 V
done
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D)
-10 V
done
clear
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A bar magnet of length \[l\]and magnetic dipole moment M is bent in the form of an arc as shown in figure. The new magnetic dipole moment will be
A)
M
done
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B)
\[\frac{3}{\pi }M\]
done
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C)
\[\frac{2}{\pi }\,M\]
done
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D)
\[\frac{M}{2}\]
done
clear
View Answer play_arrow
If a diamagnetic substance is brought near the North or the South pole of a bar magnet, it is
A)
repelled by both the poles
done
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B)
repelled by the North pole and attracted by the South pole
done
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C)
attracted by the North pole and repelled by the South pole
done
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D)
attracted by both the pole
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View Answer play_arrow
A crown of gold and copper weighs 210 gm in air and 198 gm is water. The weight of gold in crown is (Given: density of gold\[=19.3~gm/c{{m}^{3}}\] and density of copper\[=8.5\text{ }gm/c{{m}^{3}}\])
A)
93 gm
done
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B)
100 gm
done
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C)
150 gm
done
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D)
193 gm
done
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View Answer play_arrow
A magnetic needle is kept in a non-uniform magnetic field. It experiences.
A)
a force and a torque.
done
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B)
a force but not a torque.
done
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C)
a torque but not a force.
done
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D)
neither a force nor a torque.
done
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View Answer play_arrow
A Cannot engine takes \[3\times {{10}^{6}}\,\text{cal}\]of heat from a reservoir at \[627{}^\circ C\] and given it to a sink at \[27{}^\circ C\]. The work done by the engine is:
A)
\[4.2\times {{10}^{6}}\,J\]
done
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B)
\[8.4\times {{10}^{6}}\,J\]
done
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C)
\[16.8\times {{10}^{6}}\,J\]
done
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D)
0
done
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View Answer play_arrow
When n-p-n transistor is used as an amplifier:
A)
Electrons move from base to collector
done
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B)
Holes move from collector to base
done
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C)
Electrons move from collector to base
done
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D)
Holes move from base to emitter
done
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View Answer play_arrow
Current through wire XY of circuit shown is:
A)
1 A
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B)
4 A
done
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C)
2 A
done
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D)
3 A
done
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View Answer play_arrow
In the circuit shown in the figure, with steady current, the potential drop across the capacitor must be:
A)
V
done
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B)
\[\frac{1}{2}V\]
done
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C)
\[\frac{1}{3}\,V\]
done
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D)
\[\frac{2}{3}\,V\]
done
clear
View Answer play_arrow
A particle of mass m and having a positive charge q is projected from origin with a speed \[{{v}_{0}}\]along the positive \[x-\]axis in a magnetic field \[\vec{B}=-{{B}_{0}}\hat{k}\]where B is a positive constant. If the particle passes through (0, y, 0), then y is equal to:
A)
\[\frac{2m{{v}_{0}}}{q{{B}_{0}}}\]
done
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B)
\[\frac{m{{v}_{0}}}{qB}\]
done
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C)
\[\frac{m{{v}_{0}}}{qB}\]
done
clear
D)
\[\frac{2m{{v}_{0}}}{q{{B}_{0}}}\]
done
clear
View Answer play_arrow
The total current supplied to the circuit by the battery is:
A)
1 A
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B)
2 A
done
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C)
4 A
done
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D)
6 A
done
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View Answer play_arrow
In the series LCR circuit, the voltmeter and ammeter readings are:
A)
V=100 volt, I = 2 amp
done
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B)
V = 100 volt, I = 5
done
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C)
V = 1000 volt, I =2 amp
done
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D)
V = 300 volt, I = 1 amp
done
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View Answer play_arrow
The position of an object moving in the xy plane given by \[\vec{r}=x\hat{i}+y\hat{j}.\]Point O is at the origin. The object is definitely moving towards 0 when
A)
\[{{v}_{_{x}}}<0,\,{{V}_{y}}<0\]
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B)
\[{{v}_{_{x}}}>0,\,{{V}_{y}}>0\]
done
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C)
\[x{{v}_{x}}+y{{v}_{y}}>0\]
done
clear
D)
\[x{{v}_{x}}+y{{v}_{y}}<0\]
done
clear
View Answer play_arrow
A short linear object of length L lies on the axis of a spherical mirror of focal length \[f\] at a distance is from the mirror. Its image has an axial length \[L'\] equal to:
A)
\[L{{\left[ \frac{f}{u-f} \right]}^{1/2}}\]
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B)
\[L{{\left[ \frac{(u+f)}{f} \right]}^{1/2}}\]
done
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C)
\[L{{\left[ \frac{f}{(u-f)} \right]}^{2}}\]
done
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D)
\[L{{\left[ \frac{f}{(u+f)} \right]}^{2}}\]
done
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View Answer play_arrow
The magnification of an object placed in front of a convex lens of focal length 20 cm is +2. To obtain a magnification of -2, the object has to be moved a distance equal to
A)
10 cm
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B)
20 cm
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C)
30 cm
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D)
40 cm
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View Answer play_arrow
Two balls A and B are thrown vertically upwards from the same location on the surface of earth with velocities \[2\sqrt{\frac{gR}{3}}\]and \[\sqrt{\frac{2gR}{3}}\] respectively, where R is the radius of earth and g is the acceleration due to gravity. The ratio of the maximum heights attained by A to that attained by B is:
A)
8
done
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B)
\[4\sqrt{2}\]
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C)
4
done
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D)
2
done
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View Answer play_arrow
If the displacement (x) and velocity (v) of a particle executing simple harmonic motion are related through the expression \[4{{v}^{2}}=25-{{x}^{2}},\] then its time period is
A)
\[\pi \]
done
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B)
\[2\pi \]
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C)
\[4\pi \]
done
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D)
\[6\pi \]
done
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View Answer play_arrow
In the circuit shown in the figure, the potential difference across the\[4.5\,\mu F\]capacitor is:
A)
8 V
done
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B)
6 V
done
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C)
4 V
done
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D)
\[\frac{8}{3}\,V\]
done
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View Answer play_arrow
The potentiometer wire AB shown in the adjoining figure is 100 cm long when AD = 30 cm, no deflection occurs in the galvanometer. The value of R is:
A)
\[6\Omega \]
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B)
\[9\Omega \]
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C)
\[14\Omega \]
done
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D)
\[15\Omega \]
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View Answer play_arrow
A long straight wire carrying a current of 30 A is placed in an external uniform magnetic field of induction \[4\times {{10}^{-4}}T.\] The magnetic field is acting parallel to the direction of current. The magnitude of the resultant magnetic induction in tesla at a point 2.0 cm away from the wire is:\[({{\mu }_{0}}=4\pi \times {{10}^{-7}}H/m)\]
A)
\[{{10}^{-4}}\]
done
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B)
\[3\times {{10}^{-4}}\]
done
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C)
\[5\times {{10}^{-4}}\]
done
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D)
\[6\times {{10}^{-4}}\]
done
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View Answer play_arrow
A thin prism of angle \[7{}^\circ \] made of glass of refractive index 1.50 is combined with another prism made of glass of refractive index 1.75 to produce dispersion without deviation. The angle of the second prism is:
A)
\[6.47{}^\circ \]
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B)
\[4.67{}^\circ \]
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C)
\[9{}^\circ \]
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D)
\[5{}^\circ \]
done
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View Answer play_arrow
The pushing of the block will be possible along the surface if
A)
\[\tan \theta \ge \mu \]
done
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B)
\[\cot \theta \ge \mu \]
done
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C)
\[\tan \frac{\theta }{2}\ge \mu \]
done
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D)
\[\cot \frac{\theta }{2}\ge \mu \]
done
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View Answer play_arrow
A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that:
A)
its velocity is constant
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B)
its kinetic energy is constant
done
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C)
it moves in a circular path
done
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D)
both [b] and [c] are correct
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View Answer play_arrow
The resistance \[R=\frac{V}{i}\]where \[V=100\pm 5\]volts and \[i=10\pm 0.2\]amperes. What is the total error in R
A)
5%
done
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B)
7%
done
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C)
5.2%
done
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D)
\[\frac{5}{2}%\]
done
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View Answer play_arrow
The graph shows the variation of stopping potential \[{{V}_{S}}\]with the frequency v of the incident light in a photoelectric experiment. From the graph it can be concluded that (e is electronic charge)
A)
the work function of the mental is eb.
done
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B)
the work function of the metal is ea.
done
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C)
the value of Planck's constant is equal to \[\frac{2eb}{a}\]
done
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D)
the value of Planck's constant is equal to \[\frac{ea}{b}\]
done
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View Answer play_arrow
In the given figure a sphere of radius 2 m rolls on a plank. The accelerations of the sphere and the plank are indicated. The value of the angular acceleration a of the sphere is
A)
\[2\,rad/{{s}^{2}}\]
done
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B)
\[4\,rad/{{s}^{2}}\]
done
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C)
\[~3\,rad/{{s}^{2}}\]
done
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D)
\[1\,rad/{{s}^{2}}\]
done
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View Answer play_arrow
AB and CD are two identical rods each of length and mass m joined to form a cross as shown in the figure. The moment of inertia of these two rods about a bisector (XY)of angle between the rods is
A)
\[\frac{m{{\ell }^{2}}}{12}\]
done
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B)
\[\frac{m{{\ell }^{2}}}{3}\]
done
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C)
\[\frac{2m{{\ell }^{2}}}{3}\]
done
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D)
\[\frac{m{{\ell }^{2}}}{6}\]
done
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View Answer play_arrow
Temperature of 1 mole of an ideal gas is increased from 300 K to 310 K under isochoric process. Heat supplied to the gas in this process is Q = 25 R where R = universal gas constant. What amount of work has to be done by the gas if temperature of the gas decreases from 310 K to 300 K adiabatically
A)
10 R
done
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B)
50 R
done
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C)
25 R
done
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D)
\[\left( \frac{25}{2} \right)R\]
done
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View Answer play_arrow
n moles of an ideal gas undergo a process in which the temperature changes with volume as \[T=K{{V}^{2}}.\]The work done by the gas as the temperature changes from \[{{T}_{0}}\]to \[4{{T}_{0}}\]is:
A)
\[3nR{{T}_{0}}\]
done
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B)
\[\left( \frac{5}{2}nR{{T}_{0}} \right)\]
done
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C)
\[\left( \frac{3}{2} \right)nR{{T}_{0}}\]
done
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D)
0
done
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View Answer play_arrow
The wavelength of \[{{K}_{\alpha }}\]line from an element of atomic number 41 is\[\lambda .\]Then the. wavelength of\[{{K}_{\alpha }}\]line of an element of atomic number 21 is
A)
\[4\,\lambda \]
done
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B)
\[\frac{\,\lambda }{4}\]
done
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C)
\[3.08\,\lambda \]
done
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D)
\[0.26\,\lambda \]
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View Answer play_arrow
The ratio of the wavelengths of the longest wavelength lines in the Lyman and Balmer series of hydrogen spectrum is
A)
\[\frac{3}{23}\]
done
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B)
\[\frac{5}{27}\]
done
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C)
\[\frac{7}{29}\]
done
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D)
\[\frac{9}{31}\]
done
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View Answer play_arrow
An\[\alpha -\]particle of energy 5 MeV is scattered through \[180{}^\circ \] by a fixed uranium nucleus. The distance of closest approach is of the order of
A)
\[1\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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B)
\[{{10}^{-10\text{ }}}cm\]
done
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C)
\[~{{10}^{-12}}\text{ }cm\]
done
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D)
\[~{{10}^{-15}}\text{ }cm\]
done
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View Answer play_arrow
A mass of 0.5 kg moving with a speed of 1.5 m/s on a horizontal smooth surface, collides with a nearly weightless spring of force constant\[k=50\,N/m.\]The maximum compression of the spring would be:
A)
0.15 m
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B)
0.12 m
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C)
1.5 m
done
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D)
0.5 m
done
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View Answer play_arrow
A ball of mass m moving with velocity\[\upsilon \] strikes the bob of a pendulum at rest. The mass of the bob is also m. If the collision is perfectly inelastic, the height to which the bob will rise is given by:
A)
\[\frac{{{U}^{2}}}{8g}\]
done
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B)
\[\frac{{{U}^{2}}}{4g}\]
done
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C)
\[\frac{{{U}^{2}}}{2g}\]
done
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D)
\[\frac{{{U}^{2}}}{g}\]
done
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View Answer play_arrow
The linear momentum P of a body moving in one dimension varies with time according to the equation \[P=a+b{{t}^{2}}\]where a and b are positive constants. The net force acting on the body is
A)
A constant
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B)
Proportional to \[{{t}^{2}}\]
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C)
Inversely proportional to t
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D)
Proportional to t
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View Answer play_arrow
In the arrangement shown in figure, the tension in the string connecting A and B is:
A)
g
done
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B)
\[\frac{g}{9}\]
done
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C)
\[\frac{8g}{9}\]
done
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D)
\[\frac{10g}{9}\]
done
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View Answer play_arrow
A trolley is falling on a frictionless inclined plane as shown in figure. The angle of string of pendulum with the ceiling of trolley is \[(\alpha )\] equal to
A)
\[{{0}^{o}}\]
done
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B)
\[{{90}^{o}}-{{\theta }^{o}}\]
done
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C)
\[{{90}^{o}}\]
done
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D)
\[{{0}^{o}}\]
done
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View Answer play_arrow
A projectile is moving with speed \[60\,\,m{{s}^{-1}}\] at its highest point, where it breaks into two equal parts due to internal explosion. One part moves vertically up at\[50\,m{{s}^{-1}}\] with respect to ground. The other part will move at
A)
\[10\sqrt{61}\,m{{s}^{-1}}\]
done
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B)
\[110\,m{{s}^{-1}}\]
done
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C)
\[120\,m{{s}^{-1}}\]
done
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D)
\[130\,m{{s}^{-1}}\]
done
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View Answer play_arrow
A capacitor of capacitance C is charged by a battery of emf V and then disconnected. The work done by an external agent to slowly insert a dielectric of dielectric strength k of the length of the capacitor is
A)
\[\frac{1}{2}C{{V}^{2}}\left( \frac{k-1}{k+1} \right)\]
done
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B)
\[\frac{1}{2}C{{V}^{2}}\left( \frac{1-k}{k+1} \right)\]
done
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C)
\[\frac{1}{2}C{{V}^{2}}(k-1)\]
done
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D)
\[\frac{1}{2}C{{V}^{2}}(1-k)\]
done
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View Answer play_arrow
A particle crossing the origin of co-ordinates at time t = 0, moves in the \[xy-\]plane with a constant acceleration a in the y direction. If its equation of motion is \[y=b{{x}^{2}}\](b is a constant), its velocity component along \[x-\]axis is
A)
\[\sqrt{\frac{2b}{a}}\]
done
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B)
\[\sqrt{\frac{a}{2b}}\]
done
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C)
\[\sqrt{\frac{a}{b}}\]
done
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D)
\[\sqrt{\frac{b}{a}}\]
done
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View Answer play_arrow
A projectile is thrown from ground which of the following graph represents the variation of its height \[(h)\] with time (t)
A)
done
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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
There are N coplanar vectors each of magnitude V. Each vector is inclined to the preceding vector at angle\[\frac{2\pi }{N}.\]What is the magnitude of their resultant?
A)
\[\frac{V}{N}\]
done
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B)
V
done
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C)
0
done
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D)
\[\frac{N}{V}\]
done
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View Answer play_arrow
A whistle emitting a sound of frequency 440 Hz is tied to a string of 1.5 m length and rotated with an angular velocity of 20 rad/sec in the horizontal plane. Then the range of frequencies heard by an observer stationed at a large distance from the whistle will be: (U = 330 m/s):
A)
400.0 Hz to 484.0 Hz
done
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B)
403.3 Hz to 480.0 Hz
done
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C)
400.0 Hz to 480.0 Hz
done
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D)
403.3 Hz to 484.0 Hz
done
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View Answer play_arrow
The position coordinate\[x\]of a particle moving along the\[x-\]axis is given by \[x=6-3t+2{{t}^{2}}.\]The speed (s) versus time (t) of the particle is given by.
A)
done
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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
Which logic gate is represented by the following combination of logic gates?
A)
OR
done
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B)
NAND
done
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C)
AND gate
done
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D)
NOR gate
done
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View Answer play_arrow
What is the formula of bleaching powder?
A)
\[Ca{{(OCl)}_{2}}\]
done
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B)
\[Ca(OCl)Cl\]
done
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C)
\[CaO(OCl)\]
done
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D)
\[Ca{{(OCl)}_{2}}Cl\]
done
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View Answer play_arrow
Unit of mole fraction is
A)
Mol/L
done
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B)
Mol-L
done
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C)
\[~Mol/{{L}^{2}}\]
done
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D)
Dimensionless
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View Answer play_arrow
\[R-NH-COOH\xrightarrow[Pyridine]{POC{{L}_{3}}}product\]. In the given reaction, what will be the product?
A)
\[R-N=C=O\]
done
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B)
\[R-\overset{+}{\mathop{N}}\,\equiv {{C}^{-}}\]
done
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C)
\[R=C\equiv N\]
done
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D)
None of these
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View Answer play_arrow
\[A+BC+D.\]If initially the concentration of A and B are both equal but at equilibrium concentration of D will be twice of that of A, then what will be the equilibrium constant of that reaction?
A)
\[\frac{7}{8}\]
done
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B)
\[\frac{4}{9}\]
done
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C)
\[\frac{2}{6}\]
done
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D)
4
done
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View Answer play_arrow
Which of the following is secondary pollutant?
A)
\[S{{O}_{2}}\]
done
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B)
\[C{{O}_{2}}\]
done
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C)
PAN
done
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D)
\[{{N}_{2}}O\]
done
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View Answer play_arrow
The geometry of \[Ni{{(CO)}_{4}}\]and\[Ni{{(PP{{h}_{3}})}_{2}}C{{l}_{2}}\] are
A)
Square planar and tetrahedral respectively
done
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B)
Both square planar
done
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C)
Both tetrahedral
done
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D)
Tetrahedral and square planar respectively
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View Answer play_arrow
Cr is a member of 3d transition series of atomic number 24. What will be its electronic configuration?
A)
\[~3{{d}^{4}}4{{s}^{2}}\]
done
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B)
\[~3{{d}^{6}}4{{s}^{2}}\]
done
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C)
\[~3{{d}^{5}}4{{s}^{2}}\]
done
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D)
\[~3{{d}^{5}}4{{s}^{1}}\]
done
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View Answer play_arrow
Glucose has difference from fructose in that it
A)
Monosaccharide
done
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B)
Gives silver mirror with Tollen's reage
done
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C)
Does not undergo hydrolysis
done
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D)
None of the above
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View Answer play_arrow
What amount of \[C{{l}_{2}}\]gas is liberated at an 1 ampere current is passed for 30 minute from NaCl solution?
A)
0.44 moles
done
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B)
0.24 moles
done
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C)
0.66 g
done
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D)
0.21 g
done
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View Answer play_arrow
Certain crystals produce electric signals on application of pressure. This phenomenon is called
A)
Ferroelectricity
done
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B)
Ferrielectricity
done
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C)
Piezoelectricity
done
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D)
Pyroelectrici
done
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View Answer play_arrow
Aspirin is
A)
Antipyretic
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B)
An aesthetic
done
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C)
Tranquillizer
done
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D)
Narcotic
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View Answer play_arrow
Which of the following is not a property of liquid state?
A)
Lower the boiling point of a liquid, greater is its vapour pressure at room temperature.
done
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B)
All liquids accompanied by cooling evaporation.
done
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C)
Intermolecular force of attraction in a liquid is quite large.
done
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D)
A liquid boils at high temperature at top of a mountain than at the sea level.
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View Answer play_arrow
In Williamson's synthesis, ethoxyethane is prepared by
A)
Treating ethanol over heated alumina.
done
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B)
Heating sodium ethoxie with ethyl bromide.
done
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C)
Heating ethanol with dry \[A{{g}_{2}}O.\]
done
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D)
Treating ethyl alcohol with excess of \[{{H}_{2}}S{{O}_{4}}\]at 430 to 44 K.
done
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View Answer play_arrow
If for a sucrose solution, elevation in boiling point is \[0.1{}^\circ C\], then what will be the boiling point of NaCl solution for the same molal concentration?
A)
\[0.5{}^\circ C\]
done
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B)
\[0.2{}^\circ C\]
done
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C)
\[0.06{}^\circ C\]
done
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D)
\[0.03{}^\circ C\]
done
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View Answer play_arrow
Which of the following have maximum number of unpaired electrons?
A)
\[F{{e}^{3+}}\]
done
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B)
\[C{{o}^{3+}}\]
done
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C)
\[F{{e}^{2+}}\]
done
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D)
\[C{{o}^{2+}}\]
done
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View Answer play_arrow
Which of the following statements is false?
A)
Diamond and graphite are allotropes of carbon.
done
clear
B)
Calomel is \[H{{g}_{2}}C{{l}_{2}}.\]
done
clear
C)
Bleaching action of\[C{{l}_{2}}\] in moist condition is not permanent.
done
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D)
\[CaOC{{l}_{2}}\] gives\[O{{H}^{-}},C{{l}^{-}}\]and\[OC{{l}^{-}}\] in aqueous solution.
done
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View Answer play_arrow
What will be the order of 1st ionization energy?
A)
Li > Na > K
done
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B)
Na > Li > K
done
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C)
K > Li > Na
done
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D)
Li > K > Na
done
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View Answer play_arrow
The element\[{{\,}_{90}}T{{h}^{232}}\]belongs to thorium series. Which of the following will act as the end product of the series?
A)
\[{{\,}_{82}}P{{b}^{208}}\]
done
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B)
\[{{\,}_{82}}B{{i}^{206}}\]
done
clear
C)
\[{{\,}_{82}}P{{b}^{202}}\]
done
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D)
\[{{\,}_{82}}P{{b}^{205}}\]
done
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View Answer play_arrow
Which one of the following contain isopropyl group?
A)
2, 2, 3-trimethylpentane
done
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B)
2-methylpentane
done
clear
C)
2, 2, 3, 3-tetramethylpentane
done
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D)
3, 3-dimethylpentane
done
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View Answer play_arrow
Given pH of a solution A is 3 and it is mixed with another solution B having pH 2. If both are mixed, then resultant pH of the solution will be
A)
2.3
done
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B)
1.9
done
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C)
4.3
done
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D)
5.1
done
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View Answer play_arrow
With which of the given pairs \[C{{O}_{2}}\]resembles?
A)
\[HgC{{l}_{2}},{{C}_{2}}{{H}_{2}}\]
done
clear
B)
\[{{C}_{2}}{{H}_{2}},N{{O}_{2}}\]
done
clear
C)
\[{{N}_{2}}O\]and\[N{{O}_{2}}\]
done
clear
D)
\[HgC{{l}_{2}},\,SnC{{l}_{4}}\]
done
clear
View Answer play_arrow
What will be the IUPAC name of the given compound?
A)
3,5-dimethyl-6-ethylheptane
done
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B)
3,4, 6-trimethyloctane
done
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C)
2,5-diethyl-4-methylhexane
done
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D)
2,5, 6-trimethyloctane
done
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View Answer play_arrow
Which of the following will show geometrical isomerism?
A)
2, 3-dichlorobutane
done
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B)
But-2-ene
done
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C)
Ethene
done
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D)
But-1-ene
done
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View Answer play_arrow
If magnetic quantum number of a given atom is represented by -3, then what will be its principle quantum number?
A)
1
done
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B)
6
done
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C)
4
done
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D)
8
done
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View Answer play_arrow
Which of the following compounds is carborundum?
A)
\[Sn{{O}_{2}}\]
done
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B)
\[A{{l}_{2}}{{O}_{3}}\]
done
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C)
\[SiC\]
done
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D)
\[Si{{O}_{2}}\]
done
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View Answer play_arrow
HCHO reacts with \[C{{H}_{3}}MgI\]to give
A)
\[C{{H}_{3}}C{{H}_{2}}OH\]
done
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B)
\[C{{H}_{3}}C{{H}_{2}}I\]
done
clear
C)
\[C{{H}_{3}}I\]
done
clear
D)
\[C{{H}_{3}}OH\]
done
clear
View Answer play_arrow
\[\underset{CH}{\mathop{\underset{|||}{\mathop{CH}}\,}}\,\]reacts with acetic acid in presence of\[H{{g}^{2+}}\]to give
A)
\[\underset{CH{{(C{{H}_{3}}COO)}_{2}}}{\mathop{\underset{|}{\mathop{C{{H}_{3}}}}\,}}\,\]
done
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B)
\[\underset{CH{{(C{{H}_{3}}COO)}_{2}}}{\mathop{\underset{|}{\mathop{CH{{(C{{H}_{3}}COO)}_{2}}}}\,}}\,\]
done
clear
C)
\[\underset{C{{H}_{2}}(C{{H}_{3}}COO)}{\mathop{\underset{|}{\mathop{C{{H}_{3}}}}\,}}\,\]
done
clear
D)
None of the above
done
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View Answer play_arrow
Which of the following has high electron affinity?
A)
N
done
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B)
Cl
done
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C)
O
done
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D)
F
done
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View Answer play_arrow
Which among the following is the strongest acid?
A)
\[H(ClO)O\]
done
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B)
\[H(ClO){{O}_{3}}\]
done
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C)
\[H(ClO)\]
done
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D)
\[H(ClO){{O}_{2}}\]
done
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View Answer play_arrow
Which of the following amino acid is optically inactive?
A)
Asparagine
done
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B)
Glycine
done
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C)
Phenylalanine
done
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D)
Glutamic acid
done
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View Answer play_arrow
A mixture of camphor and benzoic acid can be se rated by
A)
Chemical method
done
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B)
Fractional distillation
done
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C)
Sublimation
done
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D)
Extraction with a solvent
done
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View Answer play_arrow
Which of the following gives the correct of compound involved based on their bond strength?
A)
\[~HF>HCl>HBr>HI\]
done
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B)
\[~HCl>HF>HBr>HI\]
done
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C)
\[~HI>HBr>HCl>HI\]
done
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D)
\[~HF>HBr>HCl>HF\]
done
clear
View Answer play_arrow
The enthalpy of combustion at \[25{}^\circ C\] of \[{{H}_{2}},\]cyclohexane\[({{C}_{6}}{{H}_{12}})\]and cyclohexene \[({{C}_{6}}{{H}_{10}})\]are -241. -3920 and -3800 kJ/mol respectively. The heat of hydrogenation of cyclohexene is
A)
-121 kJ/mol
done
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B)
-222 kJ/mol
done
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C)
+432 kJ/mol
done
clear
D)
+123 kJ/mol
done
clear
View Answer play_arrow
The entropy values (in\[J{{K}^{-1}}mo{{l}^{-1}}\]) of \[{{H}_{2(g)}}=130.6,\]and \[HC{{l}_{(g)}}=186.7\]at 298 K and 1 atm pressure. Then entropy change for the reaction: \[{{H}_{2(g)}}+C{{l}_{2(g)}}\to 2HC{{l}_{(g)}}\]is
A)
+450.3
done
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B)
+235.4
done
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C)
-156.7
done
clear
D)
+19.8
done
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View Answer play_arrow
A certain sample of gas has a volume of 0.2 L measured at 1 atm pressure and \[0{}^\circ C\]. At the same pressure but \[273{}^\circ C\], its volume will be
A)
0.4 L
done
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B)
0.1 L
done
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C)
43. 9 L
done
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D)
65.6 L
done
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View Answer play_arrow
Hardness of water is due to the presence of salts of
A)
\[C{{a}^{2+}}\]and \[{{K}^{+}}\]
done
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B)
\[C{{a}^{2+}}\]and\[M{{g}^{2+}}\]
done
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C)
\[N{{a}^{+}}\]and\[{{K}^{+}}\]
done
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D)
\[C{{a}^{2+}}\]and\[N{{a}^{+}}\]
done
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View Answer play_arrow
Total number of atoms represented by the compound \[CuS{{O}_{4}}.5{{H}_{2}}O\]is
A)
20
done
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B)
21
done
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C)
6
done
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D)
10
done
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View Answer play_arrow
The ratio of charge and mass would be greater for
A)
Neutron
done
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B)
Electron
done
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C)
Proton
done
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D)
Alpha
done
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View Answer play_arrow
Which will be the product in the following reaction?
A)
done
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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 half-life of a first order reaction having a rate constant\[k=1.7\times {{10}^{-5}}\]is
A)
10.1 h
done
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B)
7.9 h
done
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C)
11.3h
done
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D)
8.0 h
done
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View Answer play_arrow
Trapped into the crystal in anion vacancy, this defect is known as
A)
Frenkel defect
done
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B)
Schottky defect
done
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C)
Stoichiometric defect
done
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D)
F-centres
done
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View Answer play_arrow
The equivalent weight of phosphoric acid \[({{H}_{3}}P{{O}_{4}})\]in the below reaction is \[NaOH+{{H}_{3}}OH\to Na{{H}_{2}}P{{O}_{4}}+{{H}_{2}}O\]
A)
67
done
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B)
49
done
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C)
34
done
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D)
89
done
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View Answer play_arrow
Dumas method involves the determination of nitrogen content in the organic compound in the form of
A)
NaCN
done
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B)
\[~{{N}_{2}}\]
done
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C)
\[~N{{H}_{3}}\]
done
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D)
\[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}\]
done
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View Answer play_arrow
Which of the following is optically active?
A)
2-methylheptane
done
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B)
Butane
done
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C)
3-methylphetane
done
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D)
4-methylheptane
done
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View Answer play_arrow
Which of the following is a chiral carbon?
A)
\[C{{H}_{3}}I\]
done
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B)
\[C{{H}_{2}}C{{l}_{2}}\]
done
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C)
\[C{{H}_{4}}\]
done
clear
D)
\[CHIBrCl\]
done
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View Answer play_arrow
The correct order of hybridization of the central atom in the following species: \[N{{H}_{3}},{{[PtC{{l}_{4}}]}^{2-}},PC{{l}_{5}}\]and \[BC{{l}_{3}}\]is
A)
\[~ds{{p}^{2}},\text{ }s{{p}^{2}},\text{ }s{{p}^{3}},\text{ }ds{{p}^{3}}\]
done
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B)
\[~s{{p}^{3}},\text{ }ds{{p}^{3}},\text{ }ds{{p}^{3}},\text{ }s{{p}^{2}}\]
done
clear
C)
\[~ds{{p}^{2}},\text{ }sp\text{ },\text{ }s{{p}^{2}},\text{ }s{{p}^{3}}\]
done
clear
D)
\[~ds{{p}^{3}},\text{ }ds{{p}^{3}},\text{ }s{{p}^{2}},\text{ }s{{p}^{3}}\]
done
clear
View Answer play_arrow
By which one of the following compounds both \[C{{H}_{4}}\]and \[C{{H}_{3}}-C{{H}_{3}}\]can be prepared in one step?
A)
\[~C{{H}_{3}}I\]
done
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B)
\[{{C}_{2}}{{H}_{5}}OH\]
done
clear
C)
\[~C{{H}_{3}}OH\]
done
clear
D)
\[~C{{H}_{3}}C{{H}_{2}}I\]
done
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View Answer play_arrow
Transition metals show paramagnetism
A)
Due to high lattice energy.
done
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B)
Due to variable oxidation states.
done
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C)
Due to characteristic configuration.
done
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D)
Due to unpaired electrons.
done
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View Answer play_arrow
The reaction of HBr with\[C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,=C{{H}_{2}}\]in the presence of peroxide will give
A)
\[\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C{{H}_{3}}CBrC{{H}_{3}}}}\,}}\,\]
done
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B)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}\]
done
clear
C)
\[\underset{C{{H}_{3}}CHC{{H}_{2}}Br}{\mathop{\underset{|}{\mathop{C{{H}_{3}}}}\,}}\,\]
done
clear
D)
\[\underset{C{{H}_{3}}C{{H}_{2}}CHC{{H}_{3}}}{\mathop{\underset{|}{\mathop{C{{H}_{3}}}}\,}}\,\]
done
clear
View Answer play_arrow
DDT is prepared by reacting chlorobenzene with
A)
\[CC{{l}_{4}}\]
done
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B)
\[CC{{l}_{3}}CHO\]
done
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C)
\[{{C}_{2}}{{H}_{6}}\]
done
clear
D)
\[CHC{{l}_{3}}\]
done
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View Answer play_arrow
Which of the following represents the family of mango?
A)
Sapindales
done
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B)
Anacardiaceae
done
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C)
Poales
done
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D)
Poaceae
done
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View Answer play_arrow
Which one of the following is not a category?
A)
Species
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B)
Class
done
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C)
Phylum
done
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D)
Convolvulaceae
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View Answer play_arrow
Plant cells have all except
A)
Chloroplast
done
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B)
Cellulosic cell wall
done
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C)
Large vacuole
done
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D)
Centriole
done
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View Answer play_arrow
Whittaker's kingdom is
A)
Plantae and Animalia
done
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B)
Monera and Protista
done
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C)
Fungi
done
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D)
All
done
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View Answer play_arrow
Viruses which infect animals have
A)
Single stranded RNA
done
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B)
Double stranded RNA
done
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C)
Double stranded DNA
done
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D)
Any of the above
done
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View Answer play_arrow
Natural classification system developed were
A)
Natural affinities amongst organism
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B)
Ultra structure and anatomy
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C)
Embryology
done
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D)
All the above
done
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View Answer play_arrow
Complex post fertilization events are seen in
A)
Chlorella and spirulina
done
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B)
Gracilaria and porphyra
done
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C)
Volvox and Ulothrix
done
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D)
All the above
done
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View Answer play_arrow
Vegetative reproduction in mosses takes place by
A)
Fragmentation and budding in secondary protonema
done
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B)
Binary fission
done
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C)
Spore dispersal
done
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D)
All the above
done
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View Answer play_arrow
Which of the following is true about reproduction in mollusca?
(1) Mostly dioecious (2) Oviparous (3) Mainly indirect development (4) Fertilization in external or internal
A)
All except (4)
done
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B)
All except (3)
done
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C)
All except (2)
done
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D)
All of the above
done
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View Answer play_arrow
Which of the following is known as Portuguese man- of-war?
A)
Gorgonia
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B)
Aurelia
done
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C)
Physalia
done
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D)
Obelia
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View Answer play_arrow
Which of the following is a fresh water cartilaginous fish?
A)
Scoliodon (dog fish)
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B)
Trygon (Sting ray)
done
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C)
Torpedo (Electric ray)
done
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D)
None of these
done
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View Answer play_arrow
In wheat (monocot)
A)
Primary root is short lived
done
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B)
Primary root is replaced by fibrous roots
done
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C)
Fibrous roots arises from the base of stem
done
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D)
All are correct
done
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View Answer play_arrow
Select from the following total number of plant showing axile placentation. Dianthus, primrose, China rose, Tomato, Lemon Tulip, Aloe, Asparagus, Colchicine, Trifolium, Lupin, Arhar
A)
6
done
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B)
7
done
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C)
8
done
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D)
9
done
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View Answer play_arrow
Bulliform or motor cells are present in
A)
Dicot stem
done
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B)
Upper epidermis of dicot leaves
done
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C)
Lower epidermis of monocot leaves
done
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D)
Upper epidermis of monocot leaves
done
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View Answer play_arrow
Heartwood contains
A)
Live lignified elements
done
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B)
Dead highly lignified elements
done
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C)
Live non-lignified elements
done
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D)
Dead non-lignified elements
done
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View Answer play_arrow
Which of the following contain simple epithelium as their lining?
A)
Ducts
done
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B)
Tubes
done
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C)
Both [a] and [b]
done
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D)
Skin of mouth
done
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View Answer play_arrow
How many ootheca is produced by a female cockroach
A)
9 to 10
done
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B)
14 to 16
done
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C)
13
done
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D)
1 to 2
done
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View Answer play_arrow
The infoldings of cell membrane in prokaryote is called
A)
Mesosomes
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B)
Lysosomes
done
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C)
Both
done
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D)
None
done
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View Answer play_arrow
What is the length of mycoplasma cell?
A)
300 mm
done
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B)
\[0.3\mu m\]
done
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C)
3000 cm
done
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D)
All the above
done
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View Answer play_arrow
The macromolecular fraction is comprised of
A)
Polynucleotides
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B)
Polypeptides
done
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C)
Polysaccharides
done
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D)
All the above
done
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View Answer play_arrow
Sequence or positional information of amino acid is given by the
A)
\[2{}^\circ \text{ }structure\]
done
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B)
\[1{}^\circ \text{ }structure\]
done
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C)
Tertiary structure
done
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D)
Quaternary structure
done
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View Answer play_arrow
When apoenzyme is separated from its metal component its activity is
A)
Decreased
done
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B)
Increased
done
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C)
Lost
done
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D)
Remains unaffected
done
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View Answer play_arrow
Interphase is also known as resting stage because
A)
Cell has stopped differentiation
done
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B)
Cell is metabolically inactive
done
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C)
No visible changes occur in the nucleus
done
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D)
Cell is not growing
done
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View Answer play_arrow
If a cell has 2n number of chromosome in \[{{G}_{1}}\]Gpphase, what is the number of chromosome in cell after S-phase?
A)
n
done
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B)
4n
done
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C)
2n
done
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D)
8n
done
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View Answer play_arrow
Guttation occurs in
A)
Morning
done
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B)
Noon
done
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C)
Evening
done
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D)
Morning 10 a.m.
done
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View Answer play_arrow
Plant factor which affects transpiration are
A)
Number and distribution of stomata
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B)
Number of open stomata
done
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C)
Water status of plant
done
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D)
All the above
done
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View Answer play_arrow
A cell placed in strong solution will shrink because
A)
Cytoplasm will decompose
done
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B)
Mineral salt will break the cell wall
done
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C)
Salt water enters the cell
done
clear
D)
Water comes out by exosmosis
done
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View Answer play_arrow
Neurosis, particularly leaf tissue is caused by
A)
Ca and Mg
done
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B)
Cu
done
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C)
K
done
clear
D)
All the above
done
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View Answer play_arrow
Select the incorrect match:
A)
Element Absorbable form Nitrogen \[NO_{3}^{-},NO_{2}^{-},NH_{4}^{+}\]
done
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B)
Element Absorbable form Sulphur \[{{S}^{2-}}\]
done
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C)
Element Absorbable form Iron \[F{{e}^{3+}}\]
done
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D)
Element Absorbable form Boron \[BO_{3}^{3-},{{B}_{4}}O_{7}^{2-}\]
done
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View Answer play_arrow
In \[{{C}_{4}}\] plants, the Calvin cycle occurs in
A)
Stroma of bundle sheath chloroplast
done
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B)
Mesophyll chloroplast
done
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C)
Grana of bundle sheath chloroplast
done
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D)
Does not occur as \[C{{O}_{2}}\]is fixed mainly by PEP and no \[C{{O}_{2}}\]is left for Calvin cycle.
done
clear
View Answer play_arrow
What happens during light reaction?
A)
The pH of stroma decreases
done
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B)
The pH of lumen increases
done
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C)
The pH of lumen decreases
done
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D)
The pH of stroma has no effect
done
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View Answer play_arrow
Which of the following acts as a transmembrane channel?
A)
\[{{F}_{0}}\]of ATPase
done
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B)
\[{{F}_{1}}\]of ATPase
done
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C)
Both [a] and [b]
done
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D)
None of these
done
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View Answer play_arrow
Which of the following is a '5C' compound?
A)
Oxaloacetic acid
done
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B)
Citric acid
done
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C)
\[\alpha -\]Ketoglutaric acid
done
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D)
Succinic acid
done
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View Answer play_arrow
The common factor that occurs in all living organisms is
A)
Kreb's cycle
done
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B)
EMP pathway
done
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C)
ETC
done
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D)
All the above
done
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View Answer play_arrow
Gibberella fujikuroi causes what disease in rice plants?
A)
Foolish seeding
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B)
Bikaner
done
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C)
Both [a] and [b]
done
clear
D)
None of these
done
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View Answer play_arrow
The name 'Auxin' was given to which chemical?
A)
Indole-3-acetic acid
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B)
Indole-6-acetic acid
done
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C)
Indole-3-butyric acid
done
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D)
Indole-6-butyric acid
done
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View Answer play_arrow
One single maize root apical meristem can give rise to how many cells per hour?
A)
17500
done
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B)
>17500
done
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C)
<17500
done
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D)
None of these
done
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View Answer play_arrow
Maximum absorption of digested food takes place in
A)
Mouth
done
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B)
Stomach
done
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C)
Small intestine
done
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D)
Large intestine
done
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View Answer play_arrow
Select the total number of true statement
A. from the following: B. In stomach bolus is converted to chyme. C. Chief cells secrets intrinsic factor required for absorption of Vitamin \[{{B}_{12}}.\] C.\[\text{Pepsinogen}\xrightarrow{\text{HCl}}\text{pepsin}\] D. Pepsin converts protein into amino acids.
A)
1
done
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B)
2
done
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C)
3
done
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D)
4
done
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View Answer play_arrow
The blood leaving the lungs has all its haemoglobin oxygenated and gives up oxygen to the tissues, because
A)
The tissue can absorb \[{{O}_{2}}\]from oxyhaemoglobin.
done
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B)
\[{{O}_{2}}\] concentration in tissues is lower and \[C{{O}_{2}}\]concentration is higher as compared to lungs.
done
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C)
\[{{O}_{2}}\]concentration in tissues is higher and \[C{{O}_{2}}\]concentration is lower as compared to lungs.
done
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D)
Oxyhaemoglobin undergoes reduction.
done
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View Answer play_arrow
Diffusion membrane is made up of
A)
Thin squamous epithelium of alveoli
done
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B)
Endothelium of alveolar capillaries
done
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C)
Basement membrane between the above- mentioned two layers
done
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D)
All
done
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View Answer play_arrow
T wave on an ECG represents
A)
Depolarization of ventricles
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B)
Repolarization of ventricles
done
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C)
Repolarization of atria
done
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D)
Depolarization of atria
done
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View Answer play_arrow
When ventricular systole occurs
A)
Atrial diastole coincides
done
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B)
Tricuspid and bicuspid valves close
done
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C)
Semilunar valves guarding the pulmonary artery and aorta are forced to open.
done
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D)
All the above
done
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View Answer play_arrow
In an open circulatory system
A)
There is no heart
done
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B)
There is no need of blood vessels
done
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C)
There are open spaces or sinuses in the body
done
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D)
All the above
done
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View Answer play_arrow
Select the ammonotelic from the following:
A)
Many bony fishes
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B)
Aquatic amphibians
done
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C)
Aquatic insects
done
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D)
All the above
done
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View Answer play_arrow
Malfunctioning of kidney may lead to accumulation of ____ in blood.
A)
Glucose
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B)
Amino acid
done
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C)
Urea
done
clear
D)
All the above
done
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View Answer play_arrow
Electron microscopic studies of the sarcomeres have revealed that during muscle contraction
A)
The width of A-band remains constant.
done
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B)
The width of H-zone increases.
done
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C)
The width of I-band increases.
done
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D)
The diameter of the fibre increases.
done
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View Answer play_arrow
Put the following statement in proper order to describe muscle contraction.
1. Signal sent by CNS via motor neuron. 2. Generation of action potential in the sarcolemma. 3. Release of\[C{{a}^{+2}}\]from sarcoplasmic reticulum. 4. The neurotransmitter acetyl choline is released motor endplate. 5. I band reduced
A)
\[1\to 2\to 4\to 3\to 5\]
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B)
\[1\to 4\to 2\to 3\to 5\]
done
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C)
\[1\to 4\to 3\to 2\to 5\]
done
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D)
\[5\to 4\to 3\to 2\to 1\]
done
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View Answer play_arrow
Striped muscles have
A)
One nucleus
done
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B)
Many nuclei
done
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C)
Two nuclei
done
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D)
No nuclei
done
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View Answer play_arrow
The iris of the eye is an extension of
A)
Cornea
done
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B)
Sclerotic
done
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C)
Retina
done
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D)
Choroid
done
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View Answer play_arrow
Identify the correct sequence of organs/regions in the organization of human ear as an auditory mechanoreceptor organ:
A)
Pinna - Cochlea - Tympanic membrane - Auditory canal - Malleus - Stapes - Incus Auditory nerve
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B)
Pinna - Cochlea - Tympanic membrane - Auditory canal - Malleus - Stapes - Incus Auditory nerve
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C)
Pinna - Tympanic membrane - Auditory canal - Incus - Malleus - Stapes - Cochlea - Auditory nerve
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D)
Pinna - Malleus - Incus - Stapes - Auditory canal - Tympanic membrane - Cochlea - Auditory nerve
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Identify A to F in the given figure?
A)
A: Hypothalamus, B: Pineal, C: Thymus, D: Adrenal, E: Pituitary, F: Thyroid and parathyroid
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B)
A: Pituitary, B: Pineal, C: Hypothalamus, D: Thyroid and parathyroid, E: Thymus, F: Adrenal
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C)
A: Thymus, B: Pituitary, C: Thyroid and parathyroid, D: Pineal, E: Hypothalamus, F: Adrenal
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D)
A: Pineal, B: Thyroid and parathyroid, C: Pituitary, D: Hypothalamus, E: Adrenal, F: Pineal
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Select the total number of endocrine glands from the following. Pituitary, pineal, thyroid, parathyroid, adrenal, pancreas, thymus, gonads
A)
7
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B)
8
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C)
6
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D)
5
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Which of the following is/are male gametes?
A)
Egg
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B)
Ovum
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C)
Antherozoids
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D)
Zygote
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Which of these organisms has/have diploid parental body?
A)
Pteridophyte and gymnosperm
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B)
Angiosperm
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C)
Most of the animals
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D)
All the above
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Identify A and B in this figure?
A)
A: Thalamus, B: Endocarp
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B)
A: Thalamus, B: Achene
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C)
A: Endocarp, B: Mesocarp
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D)
A: Mesocarp, B: Endocarp
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In young anther, the tissue occupying the centre of each microsporangium is called
A)
Megaspore mother cell
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B)
Sporogenous tissue
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C)
Parietal tissue
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D)
None of these
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Match the following:
Column -I Column -II [a] Vegetative cell (1) Sporopollenin [b] Generative cell (2) Spindle-shaped cell [c] Exine (3) Large sized and has abundant food reserve [d] Intine (4) Cellulose and pectin
A)
A: 1, B: 2, C: 3, D: 4
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B)
A: 4, B: 3, C: 2, D: 1
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C)
A: 3, B: 2, C: 1, D: 4
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D)
A: 2, B: 1, C: 4, D: 3
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Which one of the following is not a male sex accessory gland?
A)
Seminal vesicle
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B)
Epididymis
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C)
Prostate
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D)
Bulbourethral
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Which of the following action the placenta does not perform?
A)
Supply of \[{{O}_{2}}\]
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B)
Supply of excretory materials
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C)
Supply of nutrients
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D)
Removal of\[C{{O}_{2}}\]
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Each testicular lobule contains ____ seminiferous tubule.
A)
Only three
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B)
Only one
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C)
One to three
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D)
More than three
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A natural method of contraception, periodic abstinence is
A)
Abstaining from coitus from days 1 to 5 of the menstrual cycle.
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B)
Abstaining from coitus from days 17 to 22 of the menstrual cycle.
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C)
Abstaining from coitus from days 10 to 17 of the menstrual cycle.
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D)
Abstaining from coitus from days 5 to 10 of the menstrual cycle.
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Fertilization outside the body in almost similar conditions as that in the body is termed as
A)
In vitro fertilization
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B)
Ex vivo fertilization
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C)
In vivo fertilization
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D)
Ex vitro fertilization
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Name the amino acid which has its 2 molecules presents in the first 7 amino acid of P-chain of haemoglobin.
A)
Val
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B)
His
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C)
Leu
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D)
Glu
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The following are the characteristics of Down's syndrome except
A)
Congenital heart disease
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B)
Broad flat face
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C)
Small and wrinkled tongue
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D)
Many 'loops' on fingertips
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Which symbol represents parents with male child affected with diseases?
A)
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B)
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C)
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D)
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The experiment which provides unequivocal proof that DNA is a genetic material came from the experiment of
A)
Watson and Crick
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B)
Wilkins and Franklin
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C)
Hershey and Chase
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D)
Avery, MacLeod and Maclyn McCarty
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HGP was closely associated with the rapid development of ____.
A)
Chemo informatics
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B)
Modern genetics
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C)
Pharmacoinformatics
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D)
Bioinformatics
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A, B, C represents which kind of selection respectively?
A)
A: Stabilizing, B: Disruptive, C: Directional
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B)
A: Stabilizing, B: Directional, C: Disruptive
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C)
A: Disruptive, B: Stabilizing, C: Directional
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D)
A: Directional, B: Disruptive, C: Stabilizing
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Which of the following matched diagrams does not correctly represent the convergent evolution?
A)
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B)
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C)
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D)
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All these are animals except
A)
Synapsids
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B)
Therapsids
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C)
Sphenopsids
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D)
Sauropsids
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Before any graft/organ transplant, which procedure should be performed?
A)
Tissue matching
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B)
Pedigree analysis
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C)
CT scan
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D)
X-ray
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If females are administered anabolic steroids, the following symptoms are observed
A)
Abnormal menstruation
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B)
Excessive hair growth
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C)
Enlargement of clitoris
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D)
All the above
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In case of_____. a piece of suspected tissue is cut into thin sections, stained and examined under microscope:
A)
Post-mortem
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B)
Biopsy
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C)
DNA fingerprinting
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D)
Pedigree analysis
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Scientists have succeeded in culturing meristems of which of the following plants?
A)
Banana
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B)
Sugarcane
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C)
Potato
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D)
All the above
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Wheat variety Atlas 66 is rich in
A)
Lipid content
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B)
Water
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C)
Protein content
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D)
Mineral content
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Which gas is the main constituent of biogas?
A)
\[{{H}_{2}}S\]
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B)
\[C{{H}_{4}}\]
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C)
\[{{C}_{2}}{{H}_{6}}\]
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D)
\[{{C}_{3}}{{H}_{8}}\]
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Once BOD from the sewage is reduced significantly, the 'floes' are allowed to sediment and it is known as _____.
A)
Primary Sludge
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B)
Secondary Sludge
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C)
Activated Sludge
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D)
Inactivated Sludge
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Restriction endonuclease
A)
Cuts DNA molecule at random
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B)
Cuts DNA from specific palindromic site
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C)
Restrict DNA synthesis
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D)
Synthesize DNA
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Plasmids are
A)
Extranuclear genes of bacteria
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B)
Endosymbiont of bacterial cells
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C)
Best vector DNA
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D)
All the above
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In RNAi, the genes are silenced using
A)
ssDNA
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B)
dsDNA
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C)
dsRNA
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D)
ssRNA
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Which of the following is true about RNAi process?
A)
Method of cellular defence
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B)
It involves the silencing of a specific mRNA due to a complementary dsRNA molecule.
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C)
Source of complementary RNA in this process may be infection by viruses having RNA genomes.
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D)
All are correct
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Adaptation includes ____ attribute of an organism.
A)
Behavioural
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B)
Physiological
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C)
Morphological
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D)
All the above
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The population size of Siberian cranes at Bharatpur wetlands in any year is ____.
A)
<10
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B)
<100
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C)
<1000
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D)
<5
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Which of the following nutrient cycle is the most complex?
A)
Nitrogen cycle
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B)
Phosphorous cycle
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C)
Carbon cycle
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D)
Oxygen cycle
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Herbivores are
A)
Producers
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B)
Primary consumers
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C)
Secondary consumers
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D)
Tertiary consumers
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Which of the following have more number of species?
A)
Fungi
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B)
Mosses
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C)
Angiosperm
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D)
Lichens
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Hotspot is a region of
A)
Endemism
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B)
Accelerated habitat loss
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C)
Low level of species richness
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D)
Both [a] and [b]
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Select the correct statement
[a] Use of incinerator is crucial to disposal of hospital waste. [b] Recycling is the only solution for the treatment of e-waste. [c] Fish-eating birds containing 2 ppm DDT because of biomagnifications [d] Polyblend is a fine powder of bitumen.
A)
A and B only
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B)
B and C only
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C)
C and D only
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D)
A, B and C only
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Which of the following biomolecule absorbs UV radiation?
A)
DNA
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B)
Protein
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C)
Both [a] and [b]
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D)
Carbohydrates
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