A particle of mass m is observed from an inertial frame of reference and is found to move in a circle of radius r with a uniform speed v. The centrifugal force on it is :-
A)
\[\frac{m{{v}^{2}}}{r}\]towards the centre
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B)
\[\frac{m{{v}^{2}}}{r}\] away from the centre
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C)
\[\frac{m{{v}^{2}}}{r}\] along the tengent through the particle
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D)
Zero
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Which of the following statement is correct :-
A)
If \[\theta ={{45}^{o}},\] then \[\bigcirc -\vec{A}\times \vec{B}=-\vec{A}.\vec{B}\]
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B)
If \[\left| {\vec{A}} \right|=\left| {\vec{B}} \right|,\] then \[(\vec{A}+\vec{B})\] must be parallel to \[(\vec{A}-\vec{B})\]
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C)
If \[\vec{A}=\vec{O},\] then \[\left| \vec{A}+\vec{B} \right|=\left| \vec{A}-\vec{B} \right|\]
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D)
None of the above
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Maximum displacement of \[x=3\,\sin \omega t+4\,\cos \omega t\]will be:
A)
3
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B)
4
done
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C)
5
done
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D)
7
done
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A simple harmonic progressive wave is represented by the equation \[:y\,=8\,\sin 2\pi (0.1x-2t)\] where x and y are in cm at t is in seconds. At any instant the phase difference two particles separated by 2 cm in the x direction is :-
A)
\[{{18}^{o}}\]
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B)
\[{{36}^{o}}\]
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C)
\[{{54}^{o}}\]
done
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D)
\[{{72}^{o}}\]
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Where is the minimum mass of two bodies of equal weight :-
A)
At moon
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B)
At equator
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C)
At sun
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D)
At poles
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A body is falling from height 'h'. It takes t seconds to reach the ground. Calculate the time taken by it to cover the first h/16 height:-
A)
\[t/\sqrt{2}\]
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B)
\[t/2\]
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C)
\[t/4\]
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D)
\[t/8\]
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View Answer play_arrow
Which of the following is not measured in units of energy :-
A)
\[\text{Couple }\times \text{ angle of rotation}\]
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B)
\[\text{Moment of inertia }\times \text{ (angular velocity}{{\text{)}}^{\text{2}}}\]
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C)
\[\text{Force }\!\!\times\!\!\text{ distance}\]
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D)
\[\text{Impulse }\times \text{ time }\!\!~\!\!\text{ }\]
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Torque acting on a body which is in x-y plane, then angular momentum will be conserved in
A)
x-direction
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B)
y-direction
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C)
in x-y plane
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D)
z-direction
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Three equal mass (m) are placed at vertex of an equilateral triangle of side r. work required to double the separation between masses will be:
A)
\[\frac{G{{m}^{2}}}{r}\]
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B)
\[\frac{3G{{m}^{2}}}{r}\]
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C)
\[\frac{3}{2}\frac{G{{m}^{2}}}{r}\]
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D)
None
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In a cyclic process change in internal energy of a system over one complete cycle is
A)
Positive
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B)
Zero
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C)
Negative
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D)
Cannot say
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In the figure shown, for an angle of incidence \[{{45}^{o}},\]at the top surface, what is the minimum refractive index needed for total internal reflection at vertical face:-
A)
\[\frac{\sqrt{2}+1}{2}\]
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B)
\[\sqrt{\frac{3}{2}}\]
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C)
\[\sqrt{\frac{1}{2}}\]
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D)
\[\sqrt{2}+1\]
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A spring executes SHM with mass of 10 kg attached to it. The force constant of spring is 10 N/m. If at any instant its velocity is 40 cm/sec, the displacement will be (here amplitude is\[0.5m\]):
A)
\[0.06\text{ }m\]
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B)
\[0.3\text{ }m\]
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C)
\[0.01\text{ }m\]
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D)
\[1.0\text{ }m\]
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A sonometer wire resonates with a given tuning fork forming standing waves with five antinodes between the two bridges when a mass of 9 kg is suspended from the wire. When this mass is replaced by a mass M, the wire resonates with the same tuning fork forming three antinodes for the same positions of the bridges. The value of M is:-
A)
\[25\text{ }kg\]
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B)
\[5\text{ }kg\]
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C)
\[12.5\text{ }kg\]
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D)
\[\frac{1}{25}\,\,kg\]
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If the escape velocity of a body of mass 2 Kg for a planet is 9 km/sec. Then the potential energy of the body on planet's surface will be:-
A)
\[-81\,MJ\]
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B)
\[-81\text{ }KJ\]
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C)
\[-81\text{ }J\]
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D)
\[~-162\text{ }MJ\]
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One mole of monoatomic gas is brought from state A to state B. The initial temperature at A is \[{{T}_{0}}\] The temperature at B will
A)
\[3\,{{T}_{0}}\]
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B)
\[6\,{{T}_{0}}\]
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C)
\[4\,{{T}_{0}}\]
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D)
\[9\,{{T}_{0}}\]
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A lens of refractive index n is put in a liquid of refractive Index n' of focal length of lens in air is f, its focal length in liquid will be :-
A)
\[-\frac{f\,n'(n-1)}{n'-n}\]
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B)
\[-\frac{f(\,n'-n)}{n'(n-1)}\]
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C)
\[-\frac{n'(\,n-1)}{f\,(n'-n)}\]
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D)
\[\frac{fn'n}{n-n'}\]
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The ratio of K.E. of the particle executing S.H.M.at mean position to the K.E. at point whose distance is half of amplitude is :
A)
\[\frac{1}{3}\]
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B)
\[\frac{2}{3}\]
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C)
\[\frac{4}{3}\]
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D)
\[\frac{3}{2}\]
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A particle is projected at angle 0 with speed u from the ground. The time after that its acceleration and velocity are perpendicular is:-
A)
\[\frac{u}{g}\]
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B)
\[\frac{2u\,\sin \theta }{g}\]
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C)
\[\frac{u\,\sin \theta }{g}\]
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D)
\[\frac{u}{g\,\,\sin \theta }\]
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View Answer play_arrow
The temperature above which the gas cannot be liquefied by applying pressure alone, is called:-
A)
Temperature of inversion
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B)
Boyle temperature
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C)
Boiling temperature
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D)
Critical temperature
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View Answer play_arrow
The chromatic Aberration in lenses becomes due to:-
A)
Disimilarity of main axis of rays
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B)
Disimilarity of radii of curvature
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C)
Variation of focal length of lenses with wavelength
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D)
None of these
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A torque of SON m is acted on a 5kg wheel of moment of inertia \[2\text{ }kg\text{ }{{m}^{2}}\]for 10 second. Then the angle rotated by wheel in 10 second
A)
750 rad
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B)
1500 rad
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C)
3000 rad
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D)
6000 rad
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The block of mass m moving on the frictionless horizontal surface collides with a spring of spring constant 'K' and compresses it by length L. The maximum momentum of the block after the .collision is :-
A)
Zero
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B)
\[M{{L}^{2}}/R\]
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C)
\[\sqrt{MK}\,\,L\]
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D)
\[K{{L}^{2}}/2M\]
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A particle moves in a circle of radius 20 cm. Its linear speed is given v = 5t, where t is in second and v in m/s. Which is correct statement -
A)
Acceleration of particle is constant
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B)
Centripetal acceleration of particle is constant
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C)
Tangential acceleration of particle is constant
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D)
Angular acceleration of particle is constant
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View Answer play_arrow
\[{{(tan\gamma )}_{gas}}<{{(\tan \beta )}_{liquid}}<{{(\tan \alpha )}_{solid}}\]What does it signify
A)
Specific heat of the gaseous state is highest
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B)
Specific heat of the solid state is highest
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C)
Specific heat decreases with temperature
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D)
None of the above
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The power of an achromatic convergent lens of two lenses is\[+2D\]. The power of convex lens is\[+5D\]. The ratio of dispersive power of convex and concave lens will be :-
A)
\[5:3~\]
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B)
\[3:5\]
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C)
\[\text{2}:5\]
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D)
\[5:2\]
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A simple pendulum is suspended from the ceiling of a stationary vehicle, its time period is T. If the vehicle is moving with constant velocity, then time period of simple pendulum will be :
A)
less than T 10
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B)
equal to 2T
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C)
more than T
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D)
unchanged
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A bus moves on a horizontal path with constant acceleration a. A boy in the bus drops a ball outside. The acceleration of the ball w.r.t. The earth and the bus respectively are --
A)
a and g-a
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B)
\[a+g\]and g
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C)
g and \[\sqrt{{{a}^{2}}+{{g}^{2}}}\]
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D)
\[a-g\]and \[a+g\]
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The r.m.s. velocity of a gas at a certain temperature is \[\sqrt{2}\] times than that of the oxygen molecules at that temperature. The gas can be:-
A)
\[{{H}_{2}}\]
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B)
He
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C)
\[C{{H}_{4}}\]
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D)
\[S{{O}_{2}}\]
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View Answer play_arrow
The figures represent three cases of a ray passing through a prism of angle A. The case corresponding to minimum deviation is :-
A)
a
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B)
b
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C)
c
done
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D)
None of these
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A second pendulum is kept in a satellite. It is revolving around the earth at the height of 3R from the earth surface. Time period of second pendulum will be:
A)
zero
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B)
\[2\sqrt{3}\,\sec \]
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C)
4 sec
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D)
infinity
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If the increase in kinetic energy of a body is 21 % then the increase in the momentum is:-
A)
22 %
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B)
44%
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C)
10%
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D)
300%
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Two stones are thrown up simultaneously with initial speeds \[{{u}_{1}}\] and \[{{u}_{2}}({{u}_{2}}-{{u}_{1}})\]. They hit the ground after 6s and 10s respectively. Which graph represents variation in distance between them with time. Assume that the stones do not rebound:-
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
Liquid Wax contracts on freezing. The melting point of wax :-
A)
Will increase with pressure increase
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B)
Will decrease with pressure increase
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C)
Will remain unchanged with pressure increase
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D)
Will increase first & then decrease with pressure increase
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A student can distinctly see the object upto a distance 15 cm. He wants to see the black board at a distance of 3 m. Focal length and power of lens used respectively will be :-
A)
\[-4.8\text{ }cm,-3.3\text{ }D~\]
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B)
\[-5.8\text{ }cm,-4.3\text{ }D\]
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C)
\[-7.5\text{ }cm,-6.3\text{ }D\]
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D)
\[-15.8\text{ }cm,-6.3\text{ }D\]
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Two discs of moment of inertia \[{{I}_{1}}\] and \[{{I}_{2}}\] are rotated about their geometrical axis with angular velocity \[{{\omega }_{1}}\]and \[{{\omega }_{2}}\] respectively. If the two discs are joint face to face coinciding their axes, then the kinetic energy of system:
A)
\[\frac{1}{2}\,({{I}_{1}}+{{I}_{2}})\,{{({{\omega }_{1}}+{{\omega }_{2}})}^{2}}\]
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B)
\[\frac{1}{2}\,({{I}_{1}}+{{I}_{2}})\,({{\omega }_{1}}+{{\omega }_{2}})\]
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C)
\[\frac{1}{2}\frac{{{({{I}_{1}}{{\omega }_{1}}+{{I}_{2}}{{\omega }_{2}})}^{2}}}{({{I}_{1}}+{{I}_{2}})}\]
done
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D)
\[\frac{1}{16}\,({{I}_{1}}+{{I}_{2}})\,{{({{\omega }_{1}}+{{\omega }_{2}})}^{2}}\]
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A rod of length 1m and mass 4kg is fixed at one end and is initially hanging vartical. The free end is now raised until it makes an angle of \[{{60}^{o}}\] with the vertical. The amount of work required will be:-
A)
\[9.8\text{ }J\]
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B)
\[19.6\text{ }J\]
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C)
\[4.9\text{ }J\]
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D)
\[2.45\text{ }J\]
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A body is projected vertically upwards with speed 100 m/s. During its assending journey it traversed x distance in last one second then distance traversed in last two second will be:-
A)
\[2x\]
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B)
\[3x\]
done
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C)
\[4x\]
done
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D)
x
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View Answer play_arrow
The PV versus P curve at Boyle temperature is
A)
A
done
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B)
B
done
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C)
C
done
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D)
D
done
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View Answer play_arrow
A ring is suspended from its one end and oscillating then its time period for small oscillations will be :-
A)
\[2\pi \sqrt{\frac{R}{g}}\]
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B)
\[2\pi \sqrt{\frac{2R}{g}}\]
done
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C)
\[2\pi \sqrt{\frac{R}{2g}}\]
done
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D)
\[2\pi \sqrt{\frac{3R}{2g}}\]
done
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Electromagnetic waves is invented by :-
A)
Maxwel
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B)
Hertz
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C)
J.C. Bose
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D)
Henary
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An automobile engine develops a torque of 280 Nm at 4000 rpm. The horse power of engine is
A)
157
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B)
176
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C)
206
done
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D)
226
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Speed-time graph of two cars A and B approaching towards each other is shown in figure. Initial distance between them is 60m. The two cars will cross each other after time
A)
2 sec
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B)
3 sec
done
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C)
\[1.5\text{ }sec\]
done
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D)
\[\sqrt{2}\text{ }sec\]
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View Answer play_arrow
The temperature gradient in a rod of \[0.5\text{ }m\]long is\[{{80}^{o}}C/m\]. If the temperature of hotter end of the rod is \[{{30}^{o}}C,\]then the temperature of the cooler end is:-
A)
\[{{40}^{o}}C\]
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B)
\[-{{10}^{o}}C\]
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C)
\[{{10}^{o}}C\]
done
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D)
\[{{20}^{o}}C\]
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View Answer play_arrow
A body of mass 10 kg and radius of gyration \[0.1\text{ }m\]is rotating about an axis. If angular speed is 10 rad/s, then angular momentum will be:
A)
\[1\,kg\,{{m}^{2}}/s\]
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B)
\[0.1\,kg\,{{m}^{2}}/s\]
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C)
\[100\,\,kg\,{{m}^{2}}/s\]
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D)
\[10\,\,kg\,{{m}^{2}}/s\]
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Displacement current goes through the gap between the plates of a capacitor when the charge of the capacitor:-a. Increases b. Decreases c. Does not change d. Is zero
A)
a, b, c
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B)
a, b
done
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C)
a, c
done
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D)
a, b, c, d
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View Answer play_arrow
A hybrid rocket propellant uses :-
A)
A liquid oxidizer and a solid fuel
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B)
A composite solid propellant
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C)
A biliquid propellant
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D)
A solid, liquid and gas as a propellant
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View Answer play_arrow
Reaction \[A+B\xrightarrow{{}}C+D+38\]kcal has activation energy 20 kcal. Activation energy for the reaction \[C+D\xrightarrow{{}}A+B\]is :-
A)
28 kcal
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B)
-20 kcal
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C)
18 kcal
done
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D)
58 kcal
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View Answer play_arrow
Property of colloidal particle is :-
A)
Attraction of medium
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B)
Tyndal effect
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C)
Emulsion
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D)
Dialysis
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View Answer play_arrow
Gold is extracted by hydrometallurgical process, based on its property :-
A)
Of being electropositive
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B)
Of being less reactive
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C)
To form complexes which are water soluble
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D)
To form salts which are water soluble
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View Answer play_arrow
Which compound has D-configuration :-
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 of the following compounds does not give carbyl amine test:-
A)
\[C{{H}_{3}}C{{H}_{2}}-N{{H}_{2}}\]
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B)
done
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C)
\[C{{H}_{3}}-NH-C{{H}_{3}}\]
done
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D)
done
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View Answer play_arrow
Beryllium fourth electron will have the four quantum numbers :-
A)
n - 1 \[\ell \]- 0 m - 0 s - \[1/2\]
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B)
n - 1 \[\ell \]- 1 m - 1 s - \[1/2\]
done
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C)
n - 2 \[\ell \]- 0 m - 0 s - \[-1/2\]
done
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D)
n - 2 \[\ell \]- 1 m - 0 s - \[+1/2\]
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View Answer play_arrow
The number of unit cells in \[58.5\text{ }g\]of \[NaCl\]is approximately:-
A)
\[6\times {{10}^{20}}\]
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B)
\[1.5\times {{10}^{23}}\]
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C)
\[6\times {{10}^{23}}\]
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D)
\[0.5\times {{10}^{24}}\]
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View Answer play_arrow
Which is insoluble in \[NaOH\]solution :-
A)
\[C{{H}_{3}}N{{O}_{2}}\]
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B)
\[{{(C{{H}_{3}})}_{2}}CHN{{O}_{2}}\]
done
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C)
\[C{{H}_{3}}CHO\]
done
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D)
\[HCHO\]
done
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View Answer play_arrow
Which of the following will react with water :-
A)
\[C{{l}_{3}}CCHO\]
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B)
\[C{{H}_{3}}COC{{H}_{3}}\]
done
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C)
\[C{{H}_{3}}CHO\]
done
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D)
\[HCHO\]
done
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View Answer play_arrow
What is the \[O{{H}^{-}}\] concentration of an aqueous solution of a substance whose \[pH=3.2\]:-
A)
\[{{10}^{-3.8}}\]
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B)
\[{{10}^{-3.2}}\]
done
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C)
\[{{10}^{-10.8}}\]
done
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D)
\[{{10}^{-10.2}}\]
done
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View Answer play_arrow
\[.....CH=CH....+{{H}_{2}}\xrightarrow{Ni}.....C{{H}_{2}}-C{{H}_{2}}....\]Promoters in this reaction can be :-
A)
\[Cu,\text{ }Te\]
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B)
\[Cu,\,Fe\]
done
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C)
\[Mo,\text{ }Fe\]
done
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D)
\[A{{l}_{2}}{{O}_{3}},C{{r}_{2}}{{O}_{3}}\]
done
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View Answer play_arrow
When \[C{{O}_{2}}\]is bubbled through a solution of barium peroxide in water :-
A)
\[{{O}_{2}}\] is released
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B)
Carbonic acid is formed
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C)
\[{{H}_{2}}{{O}_{2}}\] is formed
done
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D)
No reaction occurs
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View Answer play_arrow
Which of the following is aromatic compound:-
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
\[C{{H}_{3}}C{{H}_{2}}OH+C{{l}_{2}}\xrightarrow{{}}\] Product
A)
\[C{{H}_{3}}CC{{l}_{2}}OH\]
done
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B)
\[CC{{l}_{3}}C{{H}_{2}}OH\]
done
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C)
\[C{{H}_{3}}CHO\]
done
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D)
\[{{C}_{2}}C{{l}_{5}}OH\]
done
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View Answer play_arrow
In the reaction \[N{{H}_{3}}+{{H}_{2}}ONH_{2}^{-}+{{H}_{3}}{{O}^{+}}\]the conjugate base of \[N{{H}_{3}}\]is :-
A)
\[{{H}_{3}}{{O}^{+}}\]
done
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B)
\[NH_{2}^{-}\]
done
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C)
\[{{H}_{2}}O\]
done
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D)
None of the above
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View Answer play_arrow
To prepare a solution that is \[0.50\text{ }M\text{ }KCl\]starting with \[100\text{ }ml,\] of 0.40 M KC1 : (Mol. wt = 75) :-
A)
Add \[0.75\text{ }g\text{ }KCl\]
done
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B)
Add 20 ml of water
done
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C)
Add \[0.10\text{ }mol\text{ }KCl\]
done
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D)
Evaporate 10ml water
done
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View Answer play_arrow
In the Wurtz reaction with ethyl chloride, major product is :-
A)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\]
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B)
\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\]
done
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C)
\[C{{H}_{3}}C{{H}_{3}}\]
done
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D)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{3}}\]
done
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View Answer play_arrow
Which test is not shown by acetaldehyde :-
A)
Tollen's test
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B)
Fehling's test
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C)
Lucas test
done
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D)
All the above
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View Answer play_arrow
The number of significant figures in 0.0035 are
A)
2
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B)
3
done
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C)
4
done
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D)
5
done
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View Answer play_arrow
\[34.2\text{ }gm\]of cane sugar is dissolved in 180 gm of water. The relative lowering of vapour pressure will be:-
A)
\[0.0099\]
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B)
\[1.1597\]
done
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C)
\[0.840\]
done
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D)
\[0.9901\]
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View Answer play_arrow
When \[NaOH\]pallets are left-open in air, they acquire a fluid layer around each pallet because :-
A)
They start melting
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B)
They absorb moisture from air
done
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C)
They absorb \[C{{O}_{2}}\] from air
done
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D)
They react with air to form a liquid compound
done
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View Answer play_arrow
Which of the following alkene will show maximum hyper conjugation effect: -
A)
done
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B)
done
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C)
done
clear
D)
done
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View Answer play_arrow
Which is incorrect statement :-
A)
PVC is a polymer of vinyl chloride
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B)
Chloroprene is a monomer of neoprene
done
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C)
Teflon is a polymer of acrylonitrile
done
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D)
Bakelite is a thermosetting polymer of phenol and farmaldehyde
done
clear
View Answer play_arrow
Heat capacity at constant temperature and constant pressure for \[{{H}_{2}}\]is :-
A)
5 cal mol-1 K-1
done
clear
B)
7 cal mol-1 K-1
done
clear
C)
8 cal mol-iK-1
done
clear
D)
\[\infty \]
done
clear
View Answer play_arrow
A green coloured solution of some salt changes its colour to light pink on passing ozone through it. Which of following species represent pink and green colour respectively:-
A)
\[M{{n}^{2+}}\] and \[Mn{{O}_{2}}\]
done
clear
B)
\[Mn{{O}_{4}}^{2-}\] and \[Mn{{O}_{4}}^{-}\]
done
clear
C)
\[Mn{{O}_{4}}^{-}\] and \[Mn{{O}_{4}}^{2-}\]
done
clear
D)
\[C{{u}^{+}}\] and \[C{{u}^{2+}}\]
done
clear
View Answer play_arrow
Which is maximum reactive with \[NaN{{H}_{2}}\] :-
A)
\[C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,H-Cl\]
done
clear
B)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-I\]
done
clear
C)
\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-Br\]
done
clear
D)
\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-I\]
done
clear
View Answer play_arrow
Proteins are made up of :-
A)
Amino acids
done
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B)
Nucleosides
done
clear
C)
Phospholipids
done
clear
D)
Fats
done
clear
View Answer play_arrow
For the reaction C (graphite) \[+1/2{{O}_{2}}\,(g)\xrightarrow{{}}CO(g)\]at \[300\,K\] and 1 atm \[\Delta H=-26.4\]kcal. What is \[\Delta E\] \[(R=0.002\text{ }kcal\text{ }mo{{l}^{-1}}\text{ }{{k}^{-1}})\]
A)
\[-26.1\text{ }kcal\]
done
clear
B)
\[-26.7\text{ }kcal\]
done
clear
C)
\[-37.4\text{ }kcal\]
done
clear
D)
0
done
clear
View Answer play_arrow
Among the oxides given below which are acidic?
I. \[(Cr{{O}_{3}});\] II. \[(NiO);\] III. \[(M{{n}_{2}}{{O}_{7}});\] IV. \[(S{{O}_{2}});\] V. \[(CO)\]
A)
I, III, IV
done
clear
B)
I and II
done
clear
C)
III, IV
done
clear
D)
III, V
done
clear
View Answer play_arrow
An element A has outer shell configuration of\[5{{s}^{2}}5{{p}^{6}}\] . If forms covalent compounds \[A{{F}_{2}}\] with fluorine. The orbitals used by A for bonding are:-
A)
d-orbitals
done
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B)
p-orbitals
done
clear
C)
sp-hybridised orbital
done
clear
D)
\[s{{p}^{3}}d\]hybrid orbitals
done
clear
View Answer play_arrow
Which of the following is least stable :-
A)
\[C{{H}_{3}}-\overset{\oplus }{\mathop{C}}\,H-C{{H}_{3}}\]
done
clear
B)
\[C{{H}_{3}}-C{{H}_{2}}-\overset{\oplus }{\mathop{C}}\,{{H}_{2}}\]
done
clear
C)
\[C{{H}_{3}}-\overset{\oplus }{\mathop{\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,}}\,-C{{H}_{3}}\]
done
clear
D)
\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-\overset{\oplus }{\mathop{C}}\,H-{{C}_{6}}{{H}_{5}}\]
done
clear
View Answer play_arrow
In a body-centered cubic cell (bcc) of lattice parameter a, the atomic radius is:-
A)
\[\frac{\sqrt{3}\,a}{4}\]
done
clear
B)
\[\frac{\,a}{\sqrt{3}}\]
done
clear
C)
\[2\sqrt{2}a\]
done
clear
D)
\[\frac{a}{4}\]
done
clear
View Answer play_arrow
The enthalpy of combustion of cyclohexane, cyclohexene and \[{{H}_{2}}\] are respectively \[-3920,-3800\]and\[-241\text{ }kJ\text{ }mo{{l}^{-1}}\]. The heat of hydrogenation of cyclohexene is :-
A)
\[-121\text{ }kJ\text{ }mo{{l}^{-1}}\]
done
clear
B)
\[+121\text{ }kJ\text{ }mo{{l}^{-1}}\]
done
clear
C)
\[-242\text{ }kJ\text{ }mo{{l}^{-1}}\]
done
clear
D)
\[+242\text{ kJ mo}{{\text{l}}^{-1}}\]
done
clear
View Answer play_arrow
Pb and Sn are extracted from their chief ore by :-
A)
Carbon reduction and self reduction
done
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B)
Self reduction and carbon reduction
done
clear
C)
Electrolysis and self reduction
done
clear
D)
Self reduction and electrolysis
done
clear
View Answer play_arrow
In which of the following species back-Ti bonding exists?
A)
\[N{{F}_{3}}\]
done
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B)
\[N{{H}_{3}}\]
done
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C)
\[B{{F}_{3}}\]
done
clear
D)
\[B{{F}_{4}}^{-}\]
done
clear
View Answer play_arrow
Among the following most basic compound is:-
A)
Aniline
done
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B)
Acetanilide
done
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C)
Pyrolle
done
clear
D)
Benzyl amine
done
clear
View Answer play_arrow
The amount of electricity that should be passed through \[CuS{{O}_{4}}\] solution with \[Cu\]electrodes to deposite \[0.1\] gram atom at \[Cu\]:-
A)
9650 Coulombs
done
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B)
96500 Coulombs
done
clear
C)
19300 Coulombs
done
clear
D)
193000 Coulombs
done
clear
View Answer play_arrow
The volume of water which must be added to a mixture of \[350\text{ }c{{m}^{3}}\]of \[6M\text{ }HCl\]and \[650\text{ }mL\]of \[3M\text{ }HCl\]to get a resulting solution of 3M concentration is
A)
\[75\text{ }mL.\]
done
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B)
\[150\text{ }mL.\]
done
clear
C)
\[100\text{ }mL.\]
done
clear
D)
\[350\text{ }mL.\]
done
clear
View Answer play_arrow
The decreasing order of the second ionization potential of \[K,\text{ }Ca\]and Ba is :-
A)
\[K>Ca>Ba\]
done
clear
B)
\[Ca>Ba>K\]
done
clear
C)
\[Ba>K>Ca\]
done
clear
D)
\[K>Ba>Ca\]
done
clear
View Answer play_arrow
Which of the following will not show geometrical isomerism?
A)
\[{{[Co{{(OX)}_{3}}]}^{3-}}\]
done
clear
B)
\[[Co{{(en)}_{2}}C{{l}_{2}}]Cl\]
done
clear
C)
\[[Cr{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]Cl\]
done
clear
D)
Both b and a
done
clear
View Answer play_arrow
Major product will be:-
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
Number of Faraday required to liberate 8 g. of \[{{H}_{2}}\] is :-
A)
8
done
clear
B)
16
done
clear
C)
4
done
clear
D)
2
done
clear
View Answer play_arrow
For a third order reactions: \[3X\xrightarrow{{}}Y+Z\]the initial rate is \[5\times {{10}^{-~2}}mol\,{{L}^{-1}}\,{{S}^{-1}}\] when the cone. of X is\[0.1\text{ }mol\text{ }{{L}^{-1}}\]. The value of rate constant for the reaction is :-
A)
\[5\times {{10}^{-2}}\text{ }{{L}^{2}}\text{ }mo{{l}^{-2}}{{s}^{-1}}\]
done
clear
B)
\[5\times {{10}^{-3}}\text{ }{{L}^{2}}\text{ }{{s}^{-1}}\]
done
clear
C)
\[5\times {{10}^{-4}}{{L}^{2}}\,mo{{l}^{-2}}{{s}^{-1}}\]
done
clear
D)
\[50\,{{L}^{2}}\,mo{{l}^{-2}}{{s}^{-1}}\]
done
clear
View Answer play_arrow
Which of the following statements is true for lithium?
A)
It is the most abundant alkali metal
done
clear
B)
It has the lowest melting point among alkali metals
done
clear
C)
It is the hardest alkali metal
done
clear
D)
It is the most reactive alkali metal
done
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View Answer play_arrow
Choose the substrate analogue acts as competitive inhibitor of Kreb's enzyme succinate dehydrogenase:-
A)
Succinic acid
done
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B)
Malic acid
done
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C)
\[\alpha \]-ketoglutarate
done
clear
D)
Malonic acid
done
clear
View Answer play_arrow
A plant posses critical day length of 13 hrs is provided with given photoperiod and observed that flowering occurs the plant should be a:-
A)
Long day plant
done
clear
B)
Short day plant
done
clear
C)
Day neutral plant
done
clear
D)
Data is insufficient
done
clear
View Answer play_arrow
Dorsal tubular nerve cord is found in :-
A)
All invertebrates
done
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B)
Some invertebrates
done
clear
C)
All chordates
done
clear
D)
Some chordates
done
clear
View Answer play_arrow
Per capita means :-
A)
Per individual
done
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B)
Per couple
done
clear
C)
Per capital
done
clear
D)
Per thousand individual
done
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View Answer play_arrow
In which process, embryo is formed out side the embryo sac :-
A)
Diplospory
done
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B)
Apospory
done
clear
C)
Adventive embryony
done
clear
D)
Apogamy
done
clear
View Answer play_arrow
Among the following organ which is vestigial organ in human :-
A)
Coccyx
done
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B)
Splint bone
done
clear
C)
Pelvic girdle
done
clear
D)
Long and pointed canine teeth
done
clear
View Answer play_arrow
Gene mutation is occure due to :-
A)
Random segregation of chromosomes
done
clear
B)
Change in base sequence
done
clear
C)
Linkage and crossing over
done
clear
D)
None
done
clear
View Answer play_arrow
Which of the following aquatic ecosystems has very little primary productively?
A)
River
done
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B)
Estuary
done
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C)
Lake
done
clear
D)
Marsh
done
clear
View Answer play_arrow
Choose the step of non cyclic ETS during light reaction where phosphorylation of ADP take place :-
A)
\[PS-I\to Fd\]
done
clear
B)
Pheophytin \[\to \]Plastoquinone
done
clear
C)
Cyto.\[{{b}_{6}}\to \] Cyto.
done
clear
D)
Both (a) and (c)
done
clear
View Answer play_arrow
The non essential amino acid Glycine and Alanine are synthesized from the respiratory intermediates of which process:-
A)
Glycolysis
done
clear
B)
Kreb's cycle
done
clear
C)
Link reaction
done
clear
D)
ETS
done
clear
View Answer play_arrow
In Biennial plants the growth is:-
A)
Unlimited
done
clear
B)
Limited
done
clear
C)
Determinate
done
clear
D)
Both b & c
done
clear
View Answer play_arrow
Aschelminthes has following characters except
A)
Bilateral symmetry
done
clear
B)
Triploblastic
done
clear
C)
Schizocoel
done
clear
D)
Coelomate
done
clear
View Answer play_arrow
Condom is first discovered for :-
A)
Contraceptive
done
clear
B)
S.T.D.
done
clear
C)
Both
done
clear
D)
Spermicidal agent
done
clear
View Answer play_arrow
How many nucleus are present in a embryosac at the time of fertilization in angiosperms :-
A)
7
done
clear
B)
6
done
clear
C)
8
done
clear
D)
4
done
clear
View Answer play_arrow
The testes of male and ovaries of female are:-
A)
Vestigial structure
done
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B)
Homologous structure
done
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C)
Analogous structures
done
clear
D)
None of the above
done
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View Answer play_arrow
Sickle cell anaemia disease is an example of which type of gene mutation :-
A)
Transition
done
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B)
Transversion
done
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C)
Substitution
done
clear
D)
Polyploidy
done
clear
View Answer play_arrow
Competition for light is most intense among the plant of a :-
A)
Tropical rain forest in any season
done
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B)
Tundra region in any season
done
clear
C)
Temperate deciduous forest in the warm season
done
clear
D)
Coniferous forest in cold season
done
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View Answer play_arrow
The mobile electron carrier of plastid electron transport system is:-
A)
Cyto. C
done
clear
B)
Co Q
done
clear
C)
PQ
done
clear
D)
All the above
done
clear
View Answer play_arrow
During fermentation what does not occurs:-
A)
Oxidation of glucose into pyruvate
done
clear
B)
Substrate level phosphorylation
done
clear
C)
Oxidation of \[NAD{{H}_{2}}\]
done
clear
D)
Oxidative phosphorylation
done
clear
View Answer play_arrow
Due to senescence of plants the entropy will:-
A)
Increases
done
clear
B)
Decreases
done
clear
C)
Remain unchanged
done
clear
D)
First increases and then decreases
done
clear
View Answer play_arrow
Which of the following animals is also known as sea mouse :-
A)
Didinium
done
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B)
Echiniscus
done
clear
C)
Both a & b
done
clear
D)
Aphrodite
done
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View Answer play_arrow
Which is darker in colour :-
A)
Spring wood
done
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B)
Autumn wood
done
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C)
Sap wood
done
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D)
All of the above
done
clear
View Answer play_arrow
Embryosac represent:-
A)
Microspore
done
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B)
Megaspore
done
clear
C)
Megagametophyte
done
clear
D)
Microgametophyte
done
clear
View Answer play_arrow
The major advantage of bipedal locomotion in human is that it :-
A)
Released forelimb for other purpose
done
clear
B)
Increased speed
done
clear
C)
Reduced body weight
done
clear
D)
Provides better support to the body
done
clear
View Answer play_arrow
Adaptation of a species is its :-
A)
Ecdysis
done
clear
B)
Metamorphosis
done
clear
C)
Acquired character
done
clear
D)
Hereditary character
done
clear
View Answer play_arrow
An ecological pyramid of biomass is a representation of the ecosystems :-
A)
Energy flow through each trophic level
done
clear
B)
Tissue at each trophic level
done
clear
C)
Populations in each food web
done
clear
D)
Biological material in relation to abiotic material
done
clear
View Answer play_arrow
Antenna pigment molecules transfer the light energy to the reaction centre of light harvesting complex. This phenomenon is called is:
A)
Shifting of light
done
clear
B)
Resonance transfer
done
clear
C)
Inductive resonance
done
clear
D)
Charge separation
done
clear
View Answer play_arrow
Which of the following step of EMP pathway shows allosteric regulation :-
A)
PGA \[\to \] PEP
done
clear
B)
Glucose \[\to \]Glucose 6 phosphate
done
clear
C)
Fructose 6 phosphate \[\to \] Fructose 1,6 Biphosphate
done
clear
D)
Both (b) & (c)
done
clear
View Answer play_arrow
According to susruta samhita, kulacara is :-
A)
Wild herbivorous quadrupeds
done
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B)
Carnivorous quadrupeds
done
clear
C)
Herbivorous who frequently visit the river banks
done
clear
D)
Fish
done
clear
View Answer play_arrow
An animal which causes 'Bilharzia" disease in human belongs to class :-
A)
Turbellaria
done
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B)
Cestoda
done
clear
C)
Trematoda
done
clear
D)
Tentoculata
done
clear
View Answer play_arrow
All the tissue become dead due to activity of phellogen in dicot root which are present :-
A)
Outside the pericycle
done
clear
B)
Outside the hypodermis
done
clear
C)
Outside the cortex
done
clear
D)
Outside the epidermis
done
clear
View Answer play_arrow
In a flowering plant, sporogenous cells give rise to:-
A)
Wall of the sporangium
done
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B)
Spore mother cell
done
clear
C)
Tapetum
done
clear
D)
Both b and c
done
clear
View Answer play_arrow
We are living in :-
A)
Tertiary period
done
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B)
Holocene epoch
done
clear
C)
Mesozoic era
done
clear
D)
Jurassic period
done
clear
View Answer play_arrow
Darwin finches are good examples of :-
A)
Mimicry
done
clear
B)
Camouflage
done
clear
C)
Seasonal migration
done
clear
D)
Bio-geographical evidence of evolution
done
clear
View Answer play_arrow
A consumer whose carbon atom have already passed through three species is a :-
a. Autotrophs b. Decomposer c. Secondary consumer d. Tertiary consumers
A)
a and d
done
clear
B)
b and c
done
clear
C)
Only c
done
clear
D)
Only d
done
clear
View Answer play_arrow
The chemiosmotic theory of ADP phosphorylation is applicable on :-
A)
Oxidative phosphorylation
done
clear
B)
Photophosphorylation
done
clear
C)
substrate level phosphorylation
done
clear
D)
Both (a) and (b)
done
clear
View Answer play_arrow
The direction of movement of water in given cells is:-
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
You are asked to classify an animal which has ramphotheca and cere. In which class do you place this animal :-
A)
Amphibia
done
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B)
Reptilia
done
clear
C)
Aves
done
clear
D)
Mammalia
done
clear
View Answer play_arrow
Parenchymula is larva of :-
A)
Hydra
done
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B)
Ascaris
done
clear
C)
Pheretima
done
clear
D)
Leucosolenia
done
clear
View Answer play_arrow
Pith is less developed in :-
A)
Dicot stem
done
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B)
Dicot root
done
clear
C)
Monocot stem
done
clear
D)
Monocot root
done
clear
View Answer play_arrow
Proteinaceous part of Maize endosperm is :-
A)
Aleurone layer
done
clear
B)
Scutellum
done
clear
C)
Hilum
done
clear
D)
Apophysis
done
clear
View Answer play_arrow
Carbonaria variety of peppered moth was originated by:-
A)
Mutation
done
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B)
Natural selection
done
clear
C)
Gradual changes
done
clear
D)
Pollution
done
clear
View Answer play_arrow
Aminopurine is base analogous of which nitrogenous base :-
A)
Purine
done
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B)
Pyrimidine
done
clear
C)
Both a & b
done
clear
D)
Thymine
done
clear
View Answer play_arrow
Similar environment on different continents produce similar ecological communities, Ecologically similar species in such non adjacent communities are known as :-
A)
Sibling species
done
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B)
Ecological equivalents
done
clear
C)
Parallel species
done
clear
D)
Geographic competitors
done
clear
View Answer play_arrow
Choose the reduction step of \[{{C}_{3}}\] cycle :-
A)
\[RuBp+C{{O}_{2}}\to 2PGA\]
done
clear
B)
\[PGA+ATP\to 1,3BiPGA+ADP\]
done
clear
C)
\[1,3\,BiPGA+NADP{{H}_{2}}\to 1,3BiPGAL+NADP\]
done
clear
D)
\[PGAL+DHAP~\to Fructose\text{ }1,6\text{ }Bi\text{ }phosphate\]
done
clear
View Answer play_arrow
Halophytic seeds shows the phenomenon of vivipary as :-
A)
High ABA content in seeds
done
clear
B)
Seeds not show imbibition in halophytic soil
done
clear
C)
Water potential of saline soil is highest
done
clear
D)
Seed posses premature embryo
done
clear
View Answer play_arrow
Exclusively marine animals are found in group
A)
Poriferaand Coelenterata
done
clear
B)
Porifera and Echinodermata
done
clear
C)
Echinodermata and Protochordata
done
clear
D)
Coelenterata and Echinodermata
done
clear
View Answer play_arrow
Which of the following is not a correct match
A)
Round worm - Pseudocoelomate
done
clear
B)
Arthropoda - Haemocoel
done
clear
C)
Flat worm - Eucoelomate
done
clear
D)
Chordata - Enterocoel
done
clear
View Answer play_arrow
Which is not a plant fibre :-
A)
Silk
done
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B)
Flax
done
clear
C)
Hemp
done
clear
D)
Coir
done
clear
View Answer play_arrow
Synergids are :-
A)
4n
done
clear
B)
3n
done
clear
C)
2n
done
clear
D)
n
done
clear
View Answer play_arrow
Most of the coal & petroleum providing plants are belong to which family :-
A)
Euphorbiaceae
done
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B)
Liliaceae
done
clear
C)
Rubiaceae
done
clear
D)
Ranunculaceae
done
clear
View Answer play_arrow
In which of these, the cranial capacity was smallest:"
A)
Peking man
done
clear
B)
Neanderthal man
done
clear
C)
Java man
done
clear
D)
Cro-magnon man
done
clear
View Answer play_arrow
Brood parasitism is shown by :-
A)
Deers
done
clear
B)
Kangaroo
done
clear
C)
Cowbird
done
clear
D)
Epiphytes
done
clear
View Answer play_arrow
Atriplex is a \[{{C}_{4}}\] plant which procure \[C{{O}_{2}}\]for glucose synthesis from :-
A)
PEP
done
clear
B)
OAA
done
clear
C)
Aspartate
done
clear
D)
Malonate
done
clear
View Answer play_arrow
The main method of water absorption in plants is :-
A)
Osmotic active water absorption
done
clear
B)
Non osmotic active water absorption
done
clear
C)
Passive water absorption
done
clear
D)
Root pressure method
done
clear
View Answer play_arrow
Heart pumps impure blood in case of :-
A)
Whale
done
clear
B)
Shark
done
clear
C)
Dolfin
done
clear
D)
Both b & c
done
clear
View Answer play_arrow
'Hay flick limit' is :-
A)
50 - 55 division
done
clear
B)
500 - 550 division
done
clear
C)
100 - 110 division
done
clear
D)
No divisions
done
clear
View Answer play_arrow
Replum is characteristic feature of family :-
A)
Malvaceae
done
clear
B)
Cruciferae
done
clear
C)
Compositae
done
clear
D)
Solanaceae
done
clear
View Answer play_arrow
Which is direction of egg apparatus in anatropous ovule:-
A)
Micropylar
done
clear
B)
Chalazal
done
clear
C)
Right side
done
clear
D)
Left side
done
clear
View Answer play_arrow
Which of the following disease is not caused by fungal pathogen :-
A)
Late blight of potato
done
clear
B)
Rust of wheat
done
clear
C)
Loose smut of wheat
done
clear
D)
Bacterial leaf blight of rice
done
clear
View Answer play_arrow
\[4\times {{10}^{13}}\text{ }kg\]is :-
A)
Amount of carbon is fixed in biosphere through photosynthesis annually
done
clear
B)
Solar constant
done
clear
C)
Amount of dissolved oxygen in pollution free water
done
clear
D)
Amount of ozone in atmosphere for the period 1997-2001
done
clear
View Answer play_arrow
The association between cattle egrets, which feed on insects and cow is :-
A)
Protocooperation
done
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B)
Mutualism
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C)
Commensalism
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D)
Predation
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The highest transpiration ratio is shown by :-
A)
\[{{C}_{3}}\] plants
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B)
\[{{C}_{4}}\] plants
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C)
CAM plants
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D)
Both b and c
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The growth of lateral branches in a plant can be promoted by the application of :-
A)
TIBA
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B)
BAP
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C)
Prunning
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D)
All the above
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Aristotle's lantern is found in :-
A)
Sea anemone
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B)
Sea urchin
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C)
Sea lily
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D)
Sea star
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Degrowth present during :-
A)
Dedifferentiation
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B)
Redifferentiation
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C)
Metamorphosis of tadpole
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D)
Death
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Fruit which dehisces by one suture only, is :-
A)
Siliqua
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B)
Capsule
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C)
Legume
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D)
Follicle
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Fragrant flowers with well developed nectaries are adapted for :-
A)
Anemophily
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B)
Entomophily
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C)
Hydrophily
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D)
Self pollination
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Which of the following product is produced by parasexual hybridisation :-
A)
Bromato
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B)
Pusa sawam variety of Okra
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C)
Sonora-64 variety of wheat
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D)
Pusa Gaurav variety of Brassica
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Clean fuel is :-
A)
LPG
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B)
Leaded petrol
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C)
CNG
done
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D)
Unleaded petrol
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Macroclimate is controlled mostly by factors associated with:-
A)
Vegetation
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B)
Latitude
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C)
Longitude
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D)
All of the above
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Present level of atmospheric \[C{{O}_{2}}\] is limiting factor for the process of photosynthesis in \[{{C}_{3}}\] plants as they show :-
A)
Kranz anatomy
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B)
Oxygenation of RuBP
done
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C)
Carboxylation of RuBP
done
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D)
Final \[C{{O}_{2}}\] fixation in mesophyll cells
done
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Enzyme Nitrogenase catalyse which of the following biological activity :-
A)
Nitrification
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B)
\[{{N}_{2}}\] fixation
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C)
Ammonification
done
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D)
Nitrate reduction
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Which one of the following sets of animal show a close taxonomic relationship :-
A)
Jelly fish. Cuttle fish. Cat fish
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B)
Honey bee, Cray fish. Spider
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C)
Alligator, Nautilus, Turtle
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D)
Kangaroo, Octopus, Salamender
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If the annual growth rate of a country is 1.5 % then its population will double in :-
A)
36 yrs
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B)
46 hrs
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C)
50 hrs
done
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D)
75 hrs
done
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Tyioses are mainly found in :-
A)
Tracheids
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B)
Vessels
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C)
Phloem
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D)
Sieve cell
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Which of the following event is example of directional natural selection :-
A)
Resistant for DDT in insect
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B)
Vestigial organ
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C)
Survival of human babies with average body weight
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D)
None
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"Central rice research institute" is situated at:-
A)
Lucknow
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B)
Cuttack
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C)
Nepanagar
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D)
Barrackpore
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When a species become extinct, the plant and animal species associated with it in an obligatory way also become extinct it is called.
A)
Competition
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B)
Background extinction
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C)
Co-extinction
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D)
Co-existence
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During progressive succession nutrient conservation and efficiency of energy use are:-
A)
Decreases
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B)
Increases
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C)
Constant
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D)
First increase then decrease
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The silk fibres are held together in cocoon by substance known as :-
A)
Sericin
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B)
Cement
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C)
Glue
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D)
None of the above
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Choose the photosynthetic pigment of plants similar to the non photosynthetic pigment phytochrome :-
A)
Chlorophyll-b
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B)
Phycobilin
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C)
Chlorophyll-c
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D)
Carotene
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A farmer wants to obtain seed from the crop of Brassica olerasea var. capitata your suggestion to him is :-
A)
Use IBA
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B)
Use Morphectin
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C)
Use \[G{{A}_{3}}\]
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D)
Spray 2, 4D with \[Zn\]
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Which one is correct statement :-
A)
The larva of Balanoglossus is called tomaria larva
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B)
The lateral line system is absent in Amphibian life
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C)
Placoid scales are present in bony fishes
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D)
All vertebrates are amniotes
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If the R.L. of a population is 5 and per couple children is 4 then the population will :-
A)
Increase
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B)
Decrease
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C)
Stable
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D)
Unstable
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Histogen are components of :-
A)
Secondary meristem
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B)
Apical meristem
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C)
Lateral meristem
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D)
Intercalary meristem
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Earth originated before :-
A)
5.6 billion years
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B)
3.9 billion years
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C)
4600 million years
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D)
None
done
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Which of the following crop is example of "Rabi crop" :-
A)
Maize
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B)
Moong
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C)
Wheat
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D)
None
done
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The niche of a population is the :-
A)
Set of conditions and resources it uses
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B)
Place where it lives
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C)
Geographic area it covers
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D)
Set of interactions it has with other population
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Which can reduce the unburnt HC in auto emissions:-
a. Multipoint fuel injection engine
b. Catalytic converters
c. Carbon filter
d. E.S.P.
A)
Only a
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B)
Only b
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C)
a and b
done
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D)
c and d
done
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