Solved papers for Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2007

done Chhattisgarh PMT Solved Paper-2007

  • question_answer1) Dimensional formula for \[{{\varepsilon }_{0}}\] is

    A) \[\text{ }\!\![\!\!\text{ }{{\text{M}}^{\text{-1}}}{{\text{L}}^{\text{-2}}}{{\text{A}}^{\text{2}}}{{\text{T}}^{\text{2}}}\text{ }\!\!]\!\!\text{ }\]

    B) \[\text{ }\!\![\!\!\text{ M}{{\text{L}}^{\text{-2}}}{{\text{A}}^{\text{-2}}}{{\text{T}}^{4}}\text{ }\!\!]\!\!\text{ }\]

    C) \[\text{ }\!\![\!\!\text{ }{{\text{M}}^{-1}}{{\text{L}}^{-3}}{{\text{A}}^{\text{2}}}{{\text{T}}^{4}}\text{ }\!\!]\!\!\text{ }\]

    D) \[\text{ }\!\![\!\!\text{ M}{{\text{L}}^{3}}{{\text{A}}^{\text{-2}}}{{\text{T}}^{-4}}\text{ }\!\!]\!\!\text{ }\]

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  • question_answer2) The velocity v (in cm/s) of a particle is given in terms of time t (in sec) by the relation \[y=at+\frac{b}{t+c};\] the dimensions of a, b and c are

    A) \[a\,\text{=}\,\text{ }\!\![\!\!\text{ }{{\text{L}}^{\text{2}}}\text{ }\!\!]\!\!\text{ ,}\,\text{b}\,\text{=}\,\text{ }\!\![\!\!\text{ T }\!\!]\!\!\text{ ,}\,\text{c}\,\text{=}\,\text{ }\!\![\!\!\text{ L}{{\text{T}}^{\text{2}}}\text{ }\!\!]\!\!\text{ }\]

    B) \[a\,\text{=}\,\text{ }\!\![\!\!\text{ L}{{\text{T}}^{\text{2}}}\text{ }\!\!]\!\!\text{ ,}\,\text{b}\,\text{=}\,\text{ }\!\![\!\!\text{ LT }\!\!]\!\!\text{ ,}\,\text{c}\,\text{=}\,\text{ }\!\![\!\!\text{ L }\!\!]\!\!\text{ }\]

    C) \[a\,\text{=}\,\text{ }\!\![\!\!\text{ L}{{\text{T}}^{\text{-2}}}\text{ }\!\!]\!\!\text{ ,}\,\text{b}\,\text{=}\,\text{ }\!\![\!\!\text{ L }\!\!]\!\!\text{ ,}\,\text{c}\,\text{=}\,\text{ }\!\![\!\!\text{ T }\!\!]\!\!\text{ }\]

    D) \[a\,\text{=}\,\text{ }\!\![\!\!\text{ L }\!\!]\!\!\text{ ,}\,\text{b}\,\text{=}\,\text{ }\!\![\!\!\text{ LT }\!\!]\!\!\text{ ,}\,\text{c}\,\text{=}\,\text{ }\!\![\!\!\text{ }{{\text{T}}^{2}}\text{ }\!\!]\!\!\text{ }\]

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  • question_answer3) Car A starts initially with the acceleration \[{{a}_{1}},\] after 2 s the car B starts with acceleration \[{{a}_{2}}.\]If in \[{{\text{5}}^{\text{th}}}\text{s}\] both car travels same distance, then the ratio of a \[{{a}_{1}}\] and \[{{a}_{2}}\] will be

    A) 5 : 9

    B) 5 : 7

    C) 9 : 5

    D) 9 : 7

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  • question_answer4) The \[\text{v-t}\] graph of a moving object is given in figure. The maximum acceleration is

    A) \[1\text{ }cm/{{s}^{2}}\]

    B) \[\text{2 }cm/{{s}^{2}}\]

    C) \[\text{3 }cm/{{s}^{2}}\]

    D) \[\text{6 }cm/{{s}^{2}}\]

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  • question_answer5) A 2 kg stone at the end of a string 1 m long is whirled in a vertical circle at a constant speed. The speed of the stone is 4 m/s. The tension in the string will be 52 N, when the stone is

    A) at the top of the circle

    B) at the bottom of the circle

    C) halfway down

    D) None of the above

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  • question_answer6) Figure shows four paths for a kicked football. Ignoring the effects of air on the flight, rank the paths according to initial horizontal velocity component, highest first

    A) 1, 2, 3, 4

    B) 2, 3, 4,1

    C) 3, 4, 1, 2

    D) 4, 3, 2, 1

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  • question_answer7) A body floats in a liquid contained in a beaker. If the whole system as shown in figure falls freely under gravity, then the upthrust on the body due to liquid is

    A) zero

    B) equal to the weight of liquid displaced

    C) equal to the weight of the body in air

    D) None of the above

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  • question_answer8) Two carts of masses 200 kg and 300 kg on horizontal rails are pushed apart. Suppose the coefficient of friction between the carts and the rails are same. If the 200 kg cart travels a distance of 36 m and stops, then the distance travelled by the cart weighing 300 kg is

    A) 32m

    B) 24m

    C) 16m

    D) 12m

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  • question_answer9) The force constant of weightless spring is 16 N/m. A body of mass 1.0 kg suspended from it is pulled down through 5 cm and then released. The maximum kinetic energy of the system (spring +body) will be

    A) \[\text{2 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-2}}}\text{J}\]

    B) \[\text{4 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-2}}}\text{J}\]

    C) \[\text{8 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-2}}}\text{J}\]

    D) \[\text{16 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-2}}}\text{J}\]

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  • question_answer10) A frictionless track A B C D E ends in a circular loop of radius R. A body slides down the track from point A which is at a height h = S cm. Maximum value of R for the body to successfully complete the loop is

    A) \[\text{5}\,\text{cm}\]

    B) \[\frac{15}{4}\,\text{cm}\]

    C) \[\frac{10}{3}\,\text{cm}\]

    D) \[\text{2}\,\text{cm}\]

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  • question_answer11) A constant torque acting on a uniform circular wheel changes its angular momentum from \[{{\text{A}}_{\text{0}}}\] to \[\text{4}{{\text{A}}_{\text{0}}}\] in 4 s. The magnitude of this torque is

    A) \[\frac{3{{A}_{0}}}{4}\]

    B) \[{{A}_{0}}\]

    C) \[4{{A}_{0}}\]

    D) \[121{{A}_{0}}\]

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  • question_answer12) The rotational kinetic energy of a body is KE and its moment of inertia is \[I\] The angular momentum is

    A) \[KEI\]

    B) \[2\sqrt{KEI}\]

    C) \[\sqrt{2KEI}\]

    D) \[KE/I\]

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  • question_answer13) A planet is moving around the sun in an elliptic orbit. Its speed

    A) is the same at all points of the orbit

    B) is maximum when it is farthest from the sun

    C) is maximum when it is nearest to the sun

    D) is maximum at the two points in which the orbit is intersected by the line which passes through the focus of the orbit and which is perpendicular to its major axis

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  • question_answer14) Rohini satellite at a height of 500 km and INSAT-B at a height of 3600 km from surface of earth, then relation between their orbital velocity \[({{v}_{R,}}{{v}_{I}})\] is

    A) \[({{v}_{R}}>{{v}_{I}})\]

    B) \[({{v}_{R}}<{{v}_{I}})\]

    C) \[{{v}_{R}}={{v}_{I}})\]

    D) No relation

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  • question_answer15) A wire of cross-sectional area 3 mm2 is first stretched between two fixed points at a temperature of \[20{}^\circ C\]. Determine the tension when the temperature falls to \[10{}^\circ C\]. Coefficient of linear expansion \[a={{10}^{5}}{{\,}^{\text{o}}}{{\text{C}}^{-1}}\]and

    A) 20 N

    B) 30 N

    C) 60 N

    D) 120 N

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  • question_answer16) If the length of a wire is reduced to half, then it can hold the................. load

    A) half

    B) same

    C) double

    D) one-fourth

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  • question_answer17) If two soap bubbles of different radii are in communication with each other

    A) Air flows from larger bubble into the smaller one

    B) The size of the bubbles remains the same

    C) Air flows from the smaller bubble into the larger one and the larger bubble grows at the expense of the smaller one

    D) The air flows from the larger

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  • question_answer18) Two capillary tubes of same diameter are put vertically one each in two liquids whose relative densities are 0.8 and 0.6 and surface tensions are 60 and 50 dyne cm respectively ratio of heights of liquids in the two tubes is

    A) 10/9

    B) 3/10

    C) 10/3

    D) 9/10

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  • question_answer19) At which temperature the velocity of \[{{O}_{2}}\] molecules will be equal to the velocity of \[{{N}_{2}}\] molecules at \[O{{\,}^{\text{o}}}\text{C}\] ?

    A) \[40{}^\circ C\]

    B) \[93{}^\circ C\]

    C) \[39{}^\circ C\]

    D) Cannot be calculated

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  • question_answer20) If the volume of the gas containing m number of molecules is V, then the pressure will decrease due to force of intermolecular attraction in the proporation.

    A) \[n/V\]

    B) \[n/{{V}^{2}}\]

    C) \[~{{(n/V)}^{2}}\]

    D) \[1/{{V}^{2}}\]

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  • question_answer21) Work done in converting one gram of ice at WC into steam at \[100{}^\circ C\] is

    A) 3045 J

    B) 6056 J

    C) 721 J

    D) 616 J

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  • question_answer22) A Carnot engine working between 300 K and 600 K has a work output of 800 J per cycle. What is the amount of heat energy supplied to the engine from source per cycle ?

    A) 1200 J/cycle

    B) 1600 J/cycle

    C) 1400 J/cycle

    D) None of the above

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  • question_answer23) Two large closely spaced concentric spheres (both are black body radiators) are maintained at temperature of 200 K and 300 K respectively. The space between them is evacuated. The net rate of energy transfer between the two spheres will be (\[\sigma \]\[=5.672\times {{10}^{8}}MKS\] unit)

    A) 368.68W/m2

    B) 3686.8 W/m2

    C) 36.868 W/m2

    D) 36868 W/m2

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  • question_answer24) Two identical vessels made up of same material are filled with same amount of ice. If in the vessels the ice melts in time \[{{t}_{1}}\] and \[{{t}_{2}}\] respectively, then the ratio of their thermal conductivities will be

    A) \[{{t}_{2}}:{{t}_{1}}\]

    B) \[{{t}_{1}}:{{t}_{2}}\]

    C) \[t_{2}^{2}:t_{1}^{2}\]

    D) \[t_{1}^{2}:t_{2}^{2}\]

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  • question_answer25) The velocity-time diagram of harmonic oscillator is shown in the adjoining figure. The frequency of oscillation is

    A) \[\text{25}\,\text{Hz}\]

    B) \[\text{50}\,\text{Hz}\]

    C) \[12.25\,\text{Hz}\]

    D) \[33\,\text{Hz}\]

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  • question_answer26) The frequency of oscillation of system shown in the figure will be

    A) \[\frac{1}{2\pi }\sqrt{\frac{k}{M}}\]

    B) \[\frac{1}{2\pi }\sqrt{\frac{2k}{5M}}\]

    C) \[\frac{1}{2\pi }\sqrt{\frac{k}{5M}}\]

    D) \[\frac{1}{2\pi }\sqrt{\frac{2k}{M}}\]

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  • question_answer27) On a smooth inclined plane, a body of mass M b attached between two springs. The other ends of the springs are fixed to firm supports. If each spring has force constant k, the period of oscillation of the body (assuming the springs as massless) is

    A) \[2\pi {{\left( \frac{M}{2k} \right)}^{1/2}}\]

    B) \[2\pi {{\left( \frac{2M}{k} \right)}^{1/2}}\]

    C) \[2\pi \frac{Mg\,\sin \,\text{ }\!\!\theta\!\!\text{ }}{2k}\]

    D) \[2\pi {{\left( \frac{2Mg}{k} \right)}^{1/2}}\]

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  • question_answer28) in the arrangement shown in the figure, for vertical oscillations of the mass m, the period is

    A) \[T=2\pi \sqrt{\frac{m}{{{k}_{1}}-{{k}_{2}}}}\]

    B) \[T=2\pi \sqrt{\frac{{{k}_{1}}+{{k}_{2}}}{m}}\]

    C) \[T=2\pi \sqrt{\frac{m({{k}_{1}}+{{k}_{2}})}{{{k}_{1}}{{k}_{2}}}}\]

    D) \[T=2\pi \sqrt{\frac{mg}{{{k}_{1}}+{{k}_{2}}}}\]

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  • question_answer29) A string fixed at both the ends is vibrating in two segments. The wavelength of the corresponding time is

    A) \[l/4\]

    B) \[l/2\]

    C) \[l\]

    D) \[2l\]

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  • question_answer30) A sitar wire vibrates with frequency 330 vib/s. If its length is increased three times and tension is increased four times, then the frequency of the wire will be

    A) 330 Hz

    B) 220 Hz

    C) 110 Hz

    D) 440 Hz

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  • question_answer31) A wire of 1m length and \[9\times {{10}^{3}}g/{{m}^{3}}\] density is clamped between two points. If its extension on loading is 0.36 mm, then frequency of small transverse vibration is (Young's modulus \[=9\times {{10}^{10}}N/{{m}^{2}}\])

    A) 30 Hz

    B) 40 Hz

    C) 50 Hz

    D) 60 Hz

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  • question_answer32) The length of a sonometer wire AB is 110 cm. Where should the two bridges be placed from A to divide the wire in 3 segments whose fundamental frequencies are in the ratio of =1:2:3

    A) 30 cm and 60 cm

    B) 40 cm and 80 cm

    C) 60 cm and 90 cm

    D) 30 cm and 90 cm

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  • question_answer33) If the amplitude ratio of two sources producing interference is 3 : 5, the ratio of intensities at maxima and minima is

    A) 25 : 16

    B) 5 : 3

    C) 16 : 1

    D) 25 : 9

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  • question_answer34) In two separate set-ups of the Young's double slit experiment fringes of equal width are observed when lights of wavelengths in the ratio 1:2 are- used. If the ratio of the slit separation in the two cases is 2:1 the ratio of the distance between the plane of the slits and the screen in the two set-ups is

    A) 4:1

    B) 1:1

    C) 1:4

    D) 2:1

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  • question_answer35) Radius of curvature of concave mirror is 40 cm and the size of image is twice as that of object, then the object distance is

    A) 60 cm

    B) 20 cm

    C) 40cm

    D) 30cm

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  • question_answer36) If an object is placed 10 cm in front of a concave mirror of focal length 20 cm, the image will be

    A) diminished, upright, virtual

    B) enlarged, upright, virtual

    C) diminished, inverted, real

    D) enlarged, upright, real

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  • question_answer37) It is desired to photograph the image of an object placed at a distance of 3 m from the plane mirror. The camera which is at a distance of 4.5 m from the mirror should be focused for a distance of

    A) 3 m

    B) 4.5 m

    C) 6 m

    D) 7.5 m

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  • question_answer38) A white screen illuminated by green and red light appears to be

    A) green

    B) red

    C) yellow

    D) white

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  • question_answer39) The critical angle of light passing from glass to air is minimum for

    A) red light

    B) yellow light

    C) green light

    D) violet light

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  • question_answer40) A ray of light is incident on a equilateral prism kept on a horizontal table (as shown). Which of the following statement is wrong for the angle of minimum deviation ?

    A) P Q should be parallel to the base

    B) Q R should be parallel to the base

    C) RS should be parallel to the base

    D) Any one of PQ and RS should be horizontal

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  • question_answer41) A person cannot see objects clearly beyond 50 cm. They power of the lens to correct the vision is

    A) -5.0D

    B) -0.5D

    C) +2D

    D) -2D

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  • question_answer42) The focal length of objective and eye lens of microscope are 1.6 cm and 2.5 cm respectively. The distance between the two lenses is 21.7 cm. If the final image is formed at infinity, then the distance between the object lens and object is

    A) 1.80 cm

    B) 1.70 cm

    C) 1.65 cm

    D) 1.75 cm

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  • question_answer43) The minimum magnifying power of a telescope is m. If the focal length of its eye lens is halved, the magnifying power will become

    A) m/2

    B) 2m

    C) 3m

    D) 4m

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  • question_answer44) The rest energy of an electron is 0.511 Me V. The electron is accelerated from rest to a velocity 0.5c. The change in its energy will be

    A) 0.026 MeV

    B) 0.051 MeV

    C) 0.079 MeV

    D) 0.105 MeV

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  • question_answer45) An electron beam has a kinetic energy equal to 100 eV. Find its wavelength associated with a beam, if mass of electron \[=9.1\times {{10}^{-31}}\]kg and 1 eV\[=1.6\times {{10}^{-19}}\]J/eV (Planck's constant \[=6.6\times {{10}^{-34}}\text{J-s})\]

    A) \[6.3\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    B) \[3.8\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    C) \[24.6\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    D) \[0.12\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

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  • question_answer46) The energy of a photon of light of wavelength 450 nm is

    A) \[4.4\times {{10}^{-19}}\text{J}\]

    B) \[2.5\times {{10}^{-19}}\text{J}\]

    C) \[1.25\times {{10}^{-17}}\text{J}\]

    D) \[2.5\times {{10}^{-17}}\text{J}\]

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  • question_answer47) The wavelength of the most energetic X-ray emitted when a metal target is bombarded by 100 ke V electrons is approximately.

    A) \[12\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    B) \[4\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    C) \[0.31\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    D) \[0.124\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

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  • question_answer48) For production of characteristic \[{{K}_{\text{ }\!\!\beta\!\!\text{ }}}\] X-rays, the electron transition is

    A) \[n=2\,to\,n=1\]

    B) \[n=3\,to\,n=2\]

    C) \[n=3\,to\,n=1\]

    D) \[n=4\,to\,n=2\]

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  • question_answer49) An X-ray tube operates on 30 kV. What is the minimum wave length emitted ? \[c=3\times {{10}^{8}}\text{m}{{\text{s}}^{\text{-1}}}\text{,}\]\[e=1.6\times {{10}^{-19}}C)\] \[e=1.6\times {{10}^{-19}}C)\]

    A) \[0.133\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    B) \[0.4\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    C) \[1.2\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    D) \[6.6\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

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  • question_answer50) Atomic hydrogen is excited to the \[{{\text{n}}^{\text{th}}}\] energy level. The maximum number of spectral lines which it can emit while returning to the ground state is

    A) \[\frac{1}{2}n(n-1)\]

    B) \[\frac{1}{2}n(n+1)\]

    C) \[n(n-1)\]

    D) \[n(n+1)\]

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  • question_answer51) \[a\]-particles of energy 400 ke V are bombarded on nucleus of \[_{\text{82}}\text{Pb}\text{.}\] In scattering of \[a\]-particles, its minimum distance form nucleus will be

    A) 0.59 nm

    B) \[0.59\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    C) 5.9pm

    D) 0.59pm

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  • question_answer52) If half-life of a radioactive atom is 2.3 days, then its decay constant would be

    A) 0.1

    B) 0.2

    C) 0.3

    D) 2.3

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  • question_answer53) In a good conductor the energy gap between the conduction band and the valence band is

    A) infinite

    B) wide

    C) narrow

    D) zero

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  • question_answer54) A semiconductor has an electron concentration density of\[8\times {{10}^{14}}\text{/c}{{\text{m}}^{\text{3}}}\] and that of holes is \[5\times {{10}^{12}}\text{/c}{{\text{m}}^{\text{3}}}\text{.}\] The semiconductor is

    A) n-type

    B) p-type

    C) intrinsic

    D) p-n-p type

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  • question_answer55) The current relationship between two current gains a and \[\text{ }\!\!\beta\!\!\text{ }\] in a transistor is

    A) \[\text{ }\!\!\beta\!\!\text{ }\,\text{=}\,\frac{a}{1+a}\]

    B) \[\text{ }\!\!\beta\!\!\text{ }\,\text{=}\,\frac{a+1}{a}\]

    C) \[a\,\text{=}\,\frac{\text{ }\!\!\beta\!\!\text{ }}{a+\text{ }\!\!\beta\!\!\text{ }}\]

    D) \[\,\text{ }\!\!\beta\!\!\text{ =}\,\frac{\text{ }\!\!\beta\!\!\text{ +1}}{\text{ }\!\!\beta\!\!\text{ }}\]

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  • question_answer56) Two bar magnets of the same mass, length and breadth but magnetic moments M and 2 M respectively, when placed in same position, time period is 3 s. What will be the time period when they are placed in different position?

    A) \[\sqrt{2}\,s\]

    B) \[3\sqrt{3}\,s\]

    C) 3 s

    D) 6 s

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  • question_answer57) Vibration magnetometer works on the principle of

    A) torque acting on the bar magnet

    B) force acting on the bar magnet

    C) Both the force and the torque acting on the bar magnet

    D) None of the above

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  • question_answer58) The time period of a freely suspended magnet is 2 s. If it is broken in length into two equal parts and one part is suspended in the same way, then its time period will be

    A) 4s

    B) 2s

    C) \[\sqrt{2}\,s\]

    D) 1 s

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  • question_answer59) Which of the following charge is not possible?

    A) \[1.6\times {{10}^{-19}}C\]

    B) \[4.8\times {{10}^{-19}}C\]

    C) \[8\times {{10}^{-19}}C\]

    D) \[6\times {{10}^{-19}}C\]

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  • question_answer60) If dielectric constant of water is 81, then its permittivity is

    A) \[7.2\times {{10}^{10}}\frac{{{\text{C}}^{\text{2}}}}{\text{N-}{{\text{m}}^{\text{2}}}}\]

    B) \[8.86\times {{10}^{-9}}\frac{{{\text{C}}^{\text{2}}}}{\text{N-}{{\text{m}}^{\text{2}}}}\]

    C) \[1.02\times {{10}^{-12}}\frac{{{\text{C}}^{\text{2}}}}{\text{N-}{{\text{m}}^{\text{2}}}}\]

    D) None of these

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  • question_answer61) An electron of 100 eV energy is projected towards large negatively charged plate having charge density \[-2\times 10{{-}^{6}}C/{{m}^{2}}.\] Then, what must be the distance of electron, so it does not strike the plate?

    A) 0.44mm

    B) 0.44cm

    C) 044m

    D) None of these

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  • question_answer62) Two opposite and equal charges of \[4\times {{10}^{-8}}C\] when placed \[2\times {{10}^{-2}}cm\] away form a dipole. If this dipole is placed in an external electric field \[4\times {{10}^{8}}N/C,\] the value of maximum torque and the work done in rotating it through \[180{}^\circ C\] will be

    A) \[64\times {{10}^{-4}}Nm\text{ }and\text{ }64\times {{10}^{-4}}J\]

    B) \[32\times {{10}^{-4}}Nm\text{ }and\text{ }32\times {{10}^{-4}}J\]

    C) \[64\times {{10}^{-4}}Nm\text{ }and\text{ }32\times {{10}^{-4}}J\]

    D) \[32\times {{10}^{-4}}Nm\text{ }and\text{ }64\times {{10}^{-4}}J\]

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  • question_answer63) Water is a good solvent because its molecules are

    A) neutral

    B) polar

    C) non-polar

    D) anode

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  • question_answer64) In Figure, \[a<r<b\] then intensity at r distance from centre is

    A) \[\frac{1}{4\pi {{\varepsilon }_{0}}}\left[ \frac{3q}{{{r}^{2}}}-\frac{q}{{{(b-r)}^{2}}} \right]\]

    B) \[\frac{1}{4\pi {{\varepsilon }_{0}}}\left[ \frac{-q}{{{r}^{2}}} \right]\]

    C) \[\frac{1}{4\pi {{\varepsilon }_{0}}}\left( \frac{3q}{{{r}^{2}}} \right)\]

    D) \[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{3q}{{{a}^{2}}}\]

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  • question_answer65) An electron falls through 4 cm in uniform field f \[5\times {{10}^{4}}\text{N/C,}\] then time required must be

    A) \[2.99\times {{10}^{-7}}\text{s}\]

    B) \[2.99\times {{10}^{-8}}\text{s}\]

    C) \[2.99\times {{10}^{-9}}\text{s}\]

    D) \[2.99\times {{10}^{-10}}\text{s}\]

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  • question_answer66) A capacitor of \[6\mu F\] capacitance is charged up to 100 V. It is touched and then removed with another uncharged capacitor of \[14\mu F,\] then ratio of charges on both and potential at \[6\mu F\] capacitor is

    A) 6/14 and 50V

    B) 3/7 and 30V

    C) 7/3 and 30V

    D) None of these

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  • question_answer67) Capacity of parallel plate capacitor is \[10\mu F,\] when gap between plates is 8 cm, then what will be its capacity if gap is reduced to 4 cm?

    A) \[10\text{ }\mu F\]

    B) \[40\text{ }\mu F\]

    C) \[20\text{ }\mu F\]

    D) \[30\text{ }\mu F\]

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  • question_answer68) Capacitor of 12 pF capacitance is connected to 50V battery then electrostatic potential energy will be

    A) \[1.5\times {{10}^{-8}}\text{J}\]

    B) \[2.5\times {{10}^{-7}}\text{J}\]

    C) \[3.5\times {{10}^{-5}}\text{J}\]

    D) \[4.5\times {{10}^{-2}}\text{J}\]

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  • question_answer69) Two sphere of radii 4 cm and 6 cm are given \[80\text{ }\mu C\] and \[40\text{ }\mu C\]charges and both are joined by wire, then charge will flow.

    A) \[32\mu C\] from A to B

    B) \[24\text{ }\mu C\] from A to B

    C) \[32\text{ }\mu C\] from B to A

    D) None of the above

    View Answer play_arrow
  • question_answer70) If initial capacitance of capacitor is C, then final capacity of capacitor will be

    A) \[KC\]

    B) \[(K+1)C\]

    C) \[(K+1)C\text{/2}\]

    D) \[(K-1)C\]

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  • question_answer71) Potential difference across capacitor of 4.5 uF capacitance is

    A) 8/3 V

    B) 4V

    C) 6V

    D) 8V

    View Answer play_arrow
  • question_answer72) Equivalent capacitance between A and B for circuit shown in figure.

    A) \[3\mu F\]

    B) \[2\text{ }\mu F\]

    C) \[4\text{ }\mu F\]

    D) 8 uF

    View Answer play_arrow
  • question_answer73) Lengths of two wires are 50 cm, 100 cm respectively and their diameters are 1 mm, 2 mm then ratio between their specific resistances is

    A) 1:2

    B) 1:1

    C) 2 :1

    D) 1:4

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  • question_answer74) A torch battery consisting of two cells of 1.45 V and an internal resistance 0.15\[\Omega \] each cell sending currents through the filament of the lamps having resistance 1.5 \[\Omega .\] The value of current will be.

    A) 16.11 A

    B) 1.611 A

    C) 0.1611 A

    D) 2.6 A

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  • question_answer75) Two wires of same material and same lengths having cross-sections 3:1. If resistance of thicker wire is \[10\,\Omega \] and both are joined in series then equivalent resistance is

    A) \[10\,\Omega \]

    B) \[20\,\Omega \]

    C) \[30\,\Omega \]

    D) \[40\,\Omega \]

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  • question_answer76) In the measurement of a resistance by Wheatstone bridge the known and the unknown resistances are interchanged to neutralise

    A) end error

    B) index error

    C) error due to thermoelectric effect

    D) random error

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  • question_answer77) Equivalent resistance between A and B of circuit shown in figure.

    A) \[25\,\Omega \]

    B) \[35\,\Omega \]

    C) \[10\,\Omega \]

    D) \[5\,\Omega \]

    View Answer play_arrow
  • question_answer78) Resistances of \[6\,\Omega \] each are connected in the manner shown in adjoining figure. With the current 0.5 A as shown in figure, the potential difference \[{{\text{V}}_{\text{P}}}\text{-}{{\text{V}}_{\text{Q}}}\] is

    A) 3.5V

    B) 6.0V

    C) 3.0V

    D) 7.2V

    View Answer play_arrow
  • question_answer79) Which of the following are true when the cells are connected in series ?

    A) Current capacity decreases

    B) Current capacity increases

    C) The emf decrease

    D) The emf increases

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  • question_answer80) 34 kcal heat is liberated when \[1\text{ }g\text{ }{{H}_{1}}(ECE=1.044\times {{10}^{-8}})\] is converted into water. Minimum voltage required for it is

    A) 0.75 V

    B) 1.5 V

    C) 3.0V

    D) 4.5V

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  • question_answer81) Emf of lead accumulator after complete charging is

    A) 2.0V

    B) 1.8V

    C) 1.5V

    D) 2.2V

    View Answer play_arrow
  • question_answer82) ECE is equal to that mass of substance which is deposited on electrode in half sec by current

    A) 5 A

    B) 6 A

    C) 8A

    D) 2A

    View Answer play_arrow
  • question_answer83) Ratio of resistance of two bulbs 40 W and 60 W connected across 220 V source is

    A) 3:2

    B) 3:8

    C) 4:3

    D) 9:4

    View Answer play_arrow
  • question_answer84) If current is passed through Sb-Bi thermocouple then

    A) heat is produced at junction where current is from Sb the Bi

    B) heat is absorbed at junction where current is from Sb to Bi

    C) Both junction will become hot

    D) Both junction will become cold

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  • question_answer85) 100 W-220 V bulb is connected to 110 V source. then power consumed is

    A) 25 W

    B) 50 W

    C) 100 W

    D) 200 W

    View Answer play_arrow
  • question_answer86) Thermo emf of a couple is \[3\mu \text{ }V{{/}^{0}}C\] if temperature of cold junction is 20'C and thermo emf is increased to 0.3 mV the r. temperature of hot junction

    A) \[80{}^\circ C\]

    B) \[100{}^\circ C\]

    C) \[120{}^\circ C\]

    D) \[140{}^\circ C\]

    View Answer play_arrow
  • question_answer87) A coil has 25 turns and 10 cm radius. If it carries a 4 A current, then magnetic field at its centre is

    A) \[6.28\times {{10}^{-5}}\text{T}\]

    B) \[6.28\times {{10}^{-3}}\text{T}\]

    C) \[6.28\times {{10}^{-4}}\text{T}\]

    D) \[6.28\times {{10}^{-2}}\text{T}\]

    View Answer play_arrow
  • question_answer88) A and B are two concentric circular conductors of centre 0 and carrying currents \[{{\text{I}}_{\text{1}}}\]and \[{{\text{I}}_{2}}\] as shown in the figure. The ratio of their radii is 1: 2 and ratio of the flux densities at 0 due to A and B is 1 : 3.The value of \[{{\text{I}}_{1}}\text{/}{{\text{I}}_{2}}\]will be

    A) 1/6

    B) 1/4

    C) 1/2

    D) 1/3

    View Answer play_arrow
  • question_answer89) A power line carrying 10 A current from east to west in earth's magnetic field of 10-T, then force acting on its 1 m length is

    A) zero

    B) \[{{10}^{-2}}N\]

    C) \[{{10}^{-3}}N\]

    D) \[{{10}^{-4}}N\]

    View Answer play_arrow
  • question_answer90) If an electron moving with the kinetic energy of \[6\times {{10}^{-16}}J\] enters perpendicularly into the magnetic field of intensity \[6\times {{10}^{-3}}Wb/\text{ }{{m}^{2}},\] then the radius of the path described by it will be

    A) 3.42cm

    B) 4.23cm

    C) 5.17cm

    D) 7.7cm

    View Answer play_arrow
  • question_answer91) A conducting circular loop of radius r carries a constant current \[\text{I}\text{.}\] It is placed in a uniform magnetic field, such that B is perpendicular to the plane of the loop. The magnetic force acting on the loop is given by

    A) \[IrB\]

    B) \[2\pi IrB\]

    C) zero

    D) \[\pi IrB\]

    View Answer play_arrow
  • question_answer92) Emf of generator is 6V and internal resistance is 0.5\[k\,\Omega .\] If internal resistance of voltmeter is 2.5 \[k\,\Omega .\] then reading of voltmeter must be

    A) 10-3V

    B) 1V

    C) 5V

    D) 10 V

    View Answer play_arrow
  • question_answer93) In a tangent galvanometer a current of 0.1 A produces a deflection of \[30{}^\circ C\]. The current required to produce a deflection of \[60{}^\circ \] will be

    A) 0.6 A

    B) 0.5 A

    C) 0.4 A

    D) 0.3 A

    View Answer play_arrow
  • question_answer94) If magnetic flux linked with a coil is given by \[\phi =5{{t}^{2}}+3t+16.\] Then, induced emf in 4th sec is

    A) 10 V

    B) -10 V

    C) -43V

    D) -33V

    View Answer play_arrow
  • question_answer95) Self inductance of coil is L if it is covered with a medium of permeability u, then self inductance becomes

    A) L

    B) \[\mu \,\text{L}\]

    C) \[\mu {{\,}^{\text{2}}}\text{L}\]

    D) \[\,\text{L/}\mu \]

    View Answer play_arrow
  • question_answer96) A copper rod of length; is rotated about one end perpendicular to the uniform magnetic field B with the constant angular velocity\[\omega .\]The induced emf between the two ends is

    A) \[B\omega {{l}^{2}}\text{/2}\]

    B) \[B\omega {{l}^{2}}\]

    C) \[2B\omega {{l}^{2}}\]

    D) zero

    View Answer play_arrow
  • question_answer97) The reactance of a coil when used in the domestic AC power supply (220 V, 50 cycles/s) is 50 Q. The inductance of the coil is nearly

    A) 2.2 H

    B) 0.22 H

    C) 1.6 H

    D) 0.16 H

    View Answer play_arrow
  • question_answer98) In L-C-R circuit \[{{V}_{L}}={{V}_{C}}={{V}_{R}}=\] 10 V if C is short circuited then voltage across L will be

    A) \[\text{10/}\sqrt{\text{2}}\,\text{V}\]

    B) \[20\sqrt{\text{2}}\,\text{V}\]

    C) \[10\sqrt{\text{2}}\]

    D) \[10\,\text{V}\]

    View Answer play_arrow
  • question_answer99) A coil of resistance R and inductance L is connected to a battery of emf E volts. The final current in the coil is

    A) \[\frac{E}{R}\]

    B) \[\frac{E}{L}\]

    C) \[\sqrt{\left( \frac{E}{{{R}^{2}}+{{L}^{2}}} \right)}\]

    D) \[\sqrt{\left( \frac{EL}{{{R}^{2}}+{{L}^{2}}} \right)}\]

    View Answer play_arrow
  • question_answer100) Which quantity is increased in step down transformer ?

    A) Current

    B) Voltage

    C) Power

    D) Frequency

    View Answer play_arrow
  • question_answer101) For an electron impossible combination of quantum number is

    A) \[n=3,l=2,{{m}_{l}}=-2,{{m}_{s}}=+\frac{1}{2}\]

    B) \[n=3,l=2,{{m}_{l}}=-3,{{m}_{s}}=+\frac{1}{2}\]

    C) \[n=4,l=0,{{m}_{l}}=-3,{{m}_{s}}=-\frac{1}{2}\]

    D) \[n=5,l=3,{{m}_{l}}=0,{{m}_{s}}=-\frac{1}{2}\]

    View Answer play_arrow
  • question_answer102) The energy of an electron in nth orbit of hydrogen atom is

    A) \[\frac{13.6}{{{n}^{4}}}eV\]

    B) \[\frac{13.6}{{{n}^{3}}}eV\]

    C) \[\frac{13.6}{{{n}^{2}}}eV\]

    D) \[\frac{13.6}{n}eV\]

    View Answer play_arrow
  • question_answer103) Which of the following is not isoelectronic?

    A) \[N{{a}^{+}}\]

    B) \[M{{g}^{2+}}\]

    C) \[{{O}^{2-}}\]

    D) \[C{{l}^{-}}\]

    View Answer play_arrow
  • question_answer104) The number of unpaired electrons is maximum in (Atomic no. \[Ti=22,V=23,Cr=24,Fe=26)\])

    A) \[Fe\]

    B) \[Cr\]

    C) \[Ti\]

    D) \[V\]

    View Answer play_arrow
  • question_answer105) On moving from left to right in the second period along the periodic table the gram atomic volume of the element

    A) increases with constant velocity

    B) remains unchanged

    C) first increases and then decreases

    D) decreases

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  • question_answer106) Which of the following is the correct order of the size of iodine species?

    A) \[I>{{I}^{-}}>{{I}^{+}}\]

    B) \[{{I}^{-}}>I>{{I}^{+}}\]

    C) \[{{I}^{+}}>I>{{I}^{-}}\]

    D) \[I>{{I}^{+}}>{{I}^{-}}\]

    View Answer play_arrow
  • question_answer107) First ionisation potential of \[Be\] and B will be

    A) \[8.8\] and \[8.8\]

    B) \[6.6\] and \[6.6\]

    C) \[6.6\] and \[8.8\]

    D) \[8.8\] and \[6.6\]

    View Answer play_arrow
  • question_answer108) Which of the following electronic configuration will have maximum IP difference between II nd and IIIrd ionisation potential?

    A) \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{1}}\]

    B) \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}\]

    C) \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}\]

    D) \[1{{s}^{2}}2{{s}^{2}}2{{p}^{5}}\]

    View Answer play_arrow
  • question_answer109) Which of the following is true for a reaction in which all the products are liquid?

    A) \[\Delta H=\Delta E\]

    B) \[\Delta H=\Delta W\]

    C) \[\Delta H>\Delta E\]

    D) None of these

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  • question_answer110) Cell reaction is spontaneous when

    A) \[\Delta {{G}^{o}}\] is negative

    B) \[\Delta {{G}^{o}}\] is positive

    C) \[\Delta E_{red}^{o}\]is positive

    D) \[\Delta E_{red}^{o}\] is negative

    View Answer play_arrow
  • question_answer111) At \[{{27}^{o}}C\]latent heat of fusion of a compound is \[2930\text{ }J/mol,\] then entropy change is

    A) \[9.77J/mol-K\]

    B) \[10.77\text{ }J/mol-K\]

    C) \[9.07\text{ }J/mol-K\]

    D) \[0.977\text{ }J/mol-K\]

    View Answer play_arrow
  • question_answer112) For the reaction,\[{{C}_{2}}{{H}_{5}}OH(l)+3{{O}_{2}}(g)\xrightarrow{{}}2C{{O}_{2}}(g)+3{{H}_{2}}O(l)\] Which one is true?

    A) \[\Delta H=\Delta E-RT\]

    B) \[\Delta H=\Delta E+RT\]

    C) \[\Delta H=\Delta E+2RT~\]

    D) \[\Delta H=\Delta E-2RT~\]

    View Answer play_arrow
  • question_answer113) \[1.1\]moles of A and \[2.2\] moles of B are mixed in a container of one litre volume to obtain the equilibrium \[A+2B\rightleftharpoons 2C+D.\]. At equilibrium 0.2 moles of C are formed. The equilibrium constant for the above reaction is

    A) \[0.001\]

    B) \[0.002\]

    C) \[0.003\]

    D) \[0.004\]

    View Answer play_arrow
  • question_answer114) In which solution/solvent the solubility of \[AgCl\] is minimum?

    A) \[0.01\text{ }M\text{ }NaCl\]

    B) \[0.01\text{ }M\,\,CaC{{l}_{2}}\]

    C) Pure water

    D) \[0.001\text{ }M\,\,AgN{{O}_{3}}\]

    View Answer play_arrow
  • question_answer115) The volume strength of \[1.5\,N\,\,{{H}_{2}}{{O}_{2}}\] solution is

    A) \[8.4\]

    B) \[4.8\]

    C) \[5.2\]

    D) \[8.8\]

    View Answer play_arrow
  • question_answer116) Which one of the following salts gives an acidic solution in water?

    A) \[C{{H}_{3}}COONa\]

    B) \[N{{H}_{4}}Cl\]

    C) \[NaCl\]

    D) \[C{{H}_{3}}COON{{H}_{4}}\]

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  • question_answer117) A cell, with cell constant \[0.4\text{ }c{{m}^{-1}},\] has the resistance of 40 ohm of a \[0.01\text{ }M\]solution of an electrolyte, then the molar conductivity in \[oh{{m}^{-1}}\text{ }c{{m}^{2}}\text{ }mo{{l}^{-1}}\]will be

    A) \[{{10}^{4}}\]

    B) \[{{10}^{3}}\]

    C) \[{{10}^{2}}\]

    D) \[1\]

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  • question_answer118) \[{{H}_{2}}{{O}_{2}}\] on oxidation gives

    A) \[{{O}^{2-}}\]

    B) \[O{{H}^{-}}\]

    C) \[O_{2}^{-}\]

    D) \[{{O}_{2}}\]

    View Answer play_arrow
  • question_answer119) If the standard electrode potential for the cell \[Zn|Z{{n}^{2+}}(aq)||C{{u}^{2+}}(aq)|Cu\] is \[1.10V\]then the maximum work done by this cell will be

    A) \[-106.15\text{ }kJ\]

    B) \[~-212.30\text{ }kJ\]

    C) \[-318.45\text{ }kJ\]

    D) \[-424.60\text{ }kJ\]

    View Answer play_arrow
  • question_answer120) The oxidation states of sulphur in the anions \[SO_{3}^{2-},{{S}_{2}}O_{4}^{2-}\] and \[{{S}_{2}}O_{6}^{2-}\] follow the order

    A) \[{{S}_{2}}O_{4}^{2-}<SO_{3}^{2-}<{{S}_{2}}O_{6}^{2-}\]

    B) \[SO_{3}^{2-}<{{S}_{2}}O_{4}^{2-}<{{S}_{2}}O_{6}^{2-}\]

    C) \[{{S}_{2}}O_{4}^{2-}<{{S}_{2}}O_{6}^{2-}<SO_{3}^{2-}\]

    D) \[{{S}_{2}}O_{6}^{2-}<{{S}_{2}}O_{4}^{2-}<SO_{3}^{2-}\]

    View Answer play_arrow
  • question_answer121) \[3A\xrightarrow{{}}2B,\] rate of reaction \[\frac{+d(B)}{dt}\]is equals to

    A) \[-\frac{3}{2}\frac{d(A)}{dt}\]

    B) \[-\frac{2}{3}\frac{d(A)}{dt}\]

    C) \[-\frac{1}{3}\frac{d(A)}{dt}\]

    D) \[+2\frac{d(A)}{dt}\]

    View Answer play_arrow
  • question_answer122) \[2A\xrightarrow{{}}B+C\] It would be a zero order reaction when

    A) the rate of reaction is proportional to square of concentration of A

    B) the rate of reaction remains same at any concentration of A

    C) the rate remains unchanged at any concentration of B and C

    D) the rate of reaction doubles if concentration of B is increased to double

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  • question_answer123) The activation energy for a simple chemical reaction \[A\xrightarrow{{}}B\]is \[{{E}_{a}}\] in forward direction. The activation energy for reverse reaction

    A) is negative of \[{{E}_{a}}\]

    B) is always less than \[{{E}_{a}}\]

    C) can be less than or more than \[{{E}_{a}}\]

    D) is always double of \[{{E}_{a}}\]

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  • question_answer124) The reaction \[A\xrightarrow{{}}B\] follows first order kinetics. The time taken for \[0.8\text{ }mole\]of A to produce 0.6 mole of B is\[1\text{ }h\]. What is the time taken for conversion of \[0.9\text{ }mole\]of A to produce \[0.675\text{ }mole\]of B?

    A) \[1h\]

    B) \[0.5\text{ }h\]

    C) \[0.25\text{ }h\]

    D) \[2\text{ }h\]

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  • question_answer125) Which of the following exhibits highest solubility in water?

    A) \[N{{H}_{3}}\]

    B) \[P{{H}_{3}}\]

    C) \[As{{H}_{3}}\]

    D) \[Sb{{H}_{3}}\]

    View Answer play_arrow
  • question_answer126) Chlorine cannot displace

    A) fluorine from \[NaF\]

    B) iodine from \[NaI\]

    C) bromine from \[NaBr\]

    D) None of these

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  • question_answer127) Very dilute nitric acid reacts with zinc to form. zinc nitrate and

    A) ammonium nitrate

    B) \[N{{O}_{2}}\]

    C) \[NO\]

    D) \[{{N}_{2}}O\]

    View Answer play_arrow
  • question_answer128) The ionic radii of \[{{N}^{3-}},{{O}^{2-}},{{F}^{-}}\] and \[N{{a}^{+}}\] follow the order

    A) \[{{N}^{3-}}>{{O}^{2-}}>{{F}^{-}}>N{{a}^{+}}\]

    B) \[{{N}^{3-}}>N{{a}^{+}}>{{O}^{2-}}>{{F}^{-}}\]

    C) \[N{{a}^{+}}>{{O}^{2-}}>{{N}^{3-}}>{{F}^{-}}\]

    D) \[{{O}^{2-}}>{{F}^{-}}>N{{a}^{+}}>{{N}^{3-}}\]

    View Answer play_arrow
  • question_answer129) The structure of ionic compound with Schottky defects has

    A) same number of cationic and anionic vacancies

    B) anionic vacancy and interstitial anion

    C) cationic vacancies

    D) cationic vacancies and interstitial cation

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  • question_answer130) If a pentavalent impurity is mixed in the crystal-lattice of germanium then the semiconductor formed will be

    A) p-type semiconductor

    B) n-type semiconductor

    C) (i) and (ii) both

    D) None of the above

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  • question_answer131) A compound formed by elements X and Y crystallises in a cubic structure in which the X atoms are at the corners of a cube and the Y atoms are at the face centres. The formula of the compound is

    A) \[X{{Y}_{3}}\]

    B) \[{{X}_{3}}Y\]

    C) \[XY\]

    D) \[X{{Y}_{2}}\]

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  • question_answer132) In a face centred cubic lattice, a unit cell a shared equally by how many unit cells?

    A) \[4\]

    B) \[2\]

    C) \[6\]

    D) \[8\]

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  • question_answer133) Acetic acid dissolved in benzene shows molecular weight

    A) \[60\]

    B) \[120\]

    C) \[180\]

    D) \[240\]

    View Answer play_arrow
  • question_answer134) The vapour pressure decreases by \[10\text{ }mm\] of \[Hg\]when mole fraction of solute in a solution is\[0.2\] If the vapour pressure decreases to \[20\text{ }mm\]of \[Hg\]then the mole fraction of solute will be

    A) \[0.2\]

    B) \[0.4\]

    C) \[0.6\]

    D) \[0.8\]

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  • question_answer135) Volume of \[C{{O}_{2}}\]obtained by the complete decomposition of \[9.85\text{ }g\] \[BaC{{O}_{3}}\] is

    A) \[2.24\text{ }L\]

    B) \[1.12L\]

    C) \[0.84\text{ }L\]

    D) \[0.56\text{ }L\]

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  • question_answer136) During osmosis, flow of water through a semipermeable membrane is

    A) from both sides of semipermeable membrane with equal flow rate

    B) from solution having lower concentration only

    C) from solution having higher concentration only

    D) None of the above

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  • question_answer137) What is the entropy change (in \[J{{K}^{-1}}\,\,mo{{l}^{-1}}\]) when one mole of ice is converted into water at \[{{0}^{o}}C\]? (The enthalpy change for the conversion of ice to liquid water is \[6.0\text{ }kJ\text{ }mo{{l}^{-1}}\]at\[{{0}^{o}}C\]).

    A) \[20.13\]

    B) \[2.013\]

    C) \[2.198\]

    D) \[21.98\]

    View Answer play_arrow
  • question_answer138) The molar heat capacity of water at constant pressure, is \[75J\,\,{{K}^{-1}}\text{ }mo{{l}^{-1}}\]. When \[1.0\text{ }kJ\]of heat is supplied to \[100\text{ }g\]of water which is free to expand, the increase in temperature of water is

    A) \[1.2K\]

    B) \[2.4\text{ }K\]

    C) \[4.8\text{ }K\]

    D) \[6.6\text{ }K\]

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  • question_answer139) Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction?

    A) Endothermic and decreasing disorder

    B) Exothermic and increasing disorder

    C) Endothermic and increasing disorder

    D) Exothermic and decreasing disorder

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  • question_answer140) Identify the correct statement for change of Gibbs energy for a system \[(\Delta {{G}_{system}})\] at constant temperature and pressure

    A) If \[\Delta {{G}_{system}}=0,\] the system has attained equilibrium

    B) If \[\Delta {{G}_{system}}=0,\] the system is still moving in a particular direction

    C) If \[\Delta {{G}_{system}}=0,\] the process is not spontaneous

    D) If \[\Delta {{G}_{system}}=0,\]the process is spontaneous

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  • question_answer141) In electrolysis of \[NaCl\]when \[Pt\] electrode is taken then \[{{H}_{2}}\] is liberated at cathode while with \[Hg\]electrode it forms sodium amalgam

    A) \[Hg\] is more inert than \[Pt\]

    B) more voltage is required to reduce \[{{H}^{+}}\] at \[Hg\] than at \[Pt\]

    C) \[Na\]is dissolved in \[Hg\] while it does not dissolve in \[Pt\]

    D) concentration of \[{{H}^{+}}\] ions is larger when P\[Pt\] electrode is taken

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  • question_answer142) On the basis of the information available from the reaction\[\frac{4}{3}Al+{{O}_{2}}\xrightarrow{{}}\frac{2}{3}A{{l}_{2}}{{O}_{3}},\,\Delta G=-827\,kJ\,mo{{l}^{-1}}\] of \[{{O}_{2}}\], the minimum emf required to carry out an electrolysis of \[A{{l}_{2}}{{O}_{3}}\]is \[(F=96500C\,\,mo{{l}^{-1}})\]

    A) \[2.14V\]

    B) \[4.28V\]

    C) 6.42V

    D) \[8.56V\]

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  • question_answer143) The standard emf of a galvanic cell involving cell reaction with \[n=2\] is found to be \[0.295\text{ }V\]at \[{{25}^{o}}C\]. The equilibrium constant of the reaction would be

    A) \[2.0\times {{10}^{11}}\]

    B) \[4.0\times {{10}^{12}}\]

    C) \[1.0\times {{10}^{2}}\]

    D) \[1.0\times {{10}^{10}}\] (Given,\[F=96500\text{ }C\text{ }mo{{l}^{-1}};\] \[R=8.314\text{ }J{{K}^{-1}}\text{ }mo{{l}^{-1}}\])

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  • question_answer144) 44. \[4.5g\] of aluminium (at. mass 27 u) is deposited at cathode from \[A{{l}^{3+}}\] solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from \[{{H}^{+}}\]ions in solution by the same quantity of electric charge will be

    A) \[44.8\text{ }L\]

    B) \[11.2L\]

    C) \[22.4\text{ }L\]

    D) \[5.6\text{ }L\]

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  • question_answer145) The time of completion of \[90%\] of a first order reaction is approximately

    A) 1.1 times that of half-life

    B) 2.2 times that of half-life

    C) 3.3 times that of half-life

    D) 4.4 times that of half-life

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  • question_answer146) When a biochemical reaction is carried out in laboratory from outside of human body in the absence of enzyme than rate of reaction obtained is \[{{10}^{-6}}\] times, then activation energy of reaction in the presence of enzyme is

    A) \[6/RT\]

    B) P is required

    C) different from, \[{{E}_{a}}\] obtained in laboratory

    D) can't say any things

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  • question_answer147) The rate of reaction between two reactants A and B decreases by a factor of 4 if the concentration of reactant B is doubled. The order of this reaction with respect to reactant B is

    A) \[2\]

    B) \[-1\]

    C) \[1\]

    D) \[-2\]

    View Answer play_arrow
  • question_answer148) In a first-order reaction \[A\xrightarrow{{}}B,\]if fc is rate constant and initial concentration of reactant A is \[0.5\text{ }M\]then the half-life is

    A) \[\frac{In\,\,2}{k}\]

    B) \[\frac{0.693}{0.5}\]

    C) \[\frac{\log \,2}{2k}\]

    D) \[\frac{\log \,2}{k\sqrt{0.5}}\]

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  • question_answer149) Which ion is colorless?

    A) \[C{{r}^{4+}}\]

    B) \[S{{c}^{3+}}\]

    C) \[T{{i}^{3+}}\]

    D) \[{{V}^{4+}}\]

    View Answer play_arrow
  • question_answer150) Which of the following statement is not correct?

    A) \[La{{(OH)}_{3}}\] is less basic than \[Lu{{(OH)}_{3}}\].

    B) In lanthanide series ionic radius of \[L{{u}^{3+}}\] ion decreases.

    C) \[La\] is actually an element of transition series rather lanthanide.

    D) Atomic radius of \[Zr\] and Hf are same because of lanthanide contraction.

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  • question_answer151) Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionisation enthalpy?

    A) Vanadium \[(Z=23)\]

    B) Manganese \[(Z=25)\]

    C) Chromium \[(Z=24)\]

    D) Iron \[(Z=26)\]

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  • question_answer152) Which of the following will replace \[B{{r}_{2}}\] from the aqueous solution having bromide ion?

    A) \[C{{l}_{2}}\]

    B) \[I_{3}^{\bigcirc -}\]

    C) \[{{I}_{2}}\]

    D) \[C{{l}^{\bigcirc -}}\]

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  • question_answer153) If \[2.0\text{ }g\]of a radioactive substance has half-life of 7 days, the half-life of \[1\text{ }g\]sample is

    A) 7 days

    B) 14 days

    C) 28 days

    D) 35 days

    View Answer play_arrow
  • question_answer154) \[_{n}{{X}^{m}}\] emit one a-and two P-particles. It is converted into

    A) \[_{n}{{X}^{m-4}}\]

    B) \[_{n-1}{{X}^{m-1}}\]

    C) \[_{n}{{Z}^{m-4}}\]

    D) None of these

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  • question_answer155) \[-{{[NH{{(C{{H}_{2}})}_{6}}NHCO{{(C{{H}_{2}})}_{4}}]}_{n}}-\] is a

    A) addition polymer

    B) thermosetting polymer

    C) homopolymer

    D) copolymer

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  • question_answer156) Isoprene is a valuable substance for making

    A) propene

    B) liquid fuel

    C) synthetic rubber

    D) petrol

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  • question_answer157) Enzymes are made up of

    A) edible proteins

    B) proteins with specific structure

    C) nitrogen containing carbohydrates

    D) carbohydrates

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  • question_answer158) According to the adsorption theory of catalysis. the speed of the reaction increase because

    A) the concentration of reactant molecules at the active centres of the catalyst becomes high due to adsorption

    B) in the process of adsorption, the activation energy of the molecules becomes large

    C) absorption produces heat which increases the speed of the reaction

    D) adsorption lowers the activation energy of the reaction

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  • question_answer159) In the metallurgy of which of the following cupellation process is used?

    A) Copper

    B) Silver

    C) Iron

    D) Aluminium

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  • question_answer160) Cryolite is used in the electrolytic extraction of aluminium

    A) to obtain more aluminium

    B) to decompose bauxite

    C) to protect anodes

    D) as a reducing agent

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  • question_answer161) 18 carat gold contains

    A) \[18%\] gold

    B) \[24%\] gold

    C) \[75%\] gold

    D) \[60%\] gold

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  • question_answer162) The brass is an alloy of

    A) gold and copper

    B) silver and zinc

    C) copper and zinc

    D) copper and aluminium

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  • question_answer163) Which of the following metals will not form an amalgam?

    A) Gold

    B) Silver

    C) Zinc

    D) Iron

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  • question_answer164) Which of the following is pseudo halogen?

    A) \[I{{F}_{7}}\]

    B) \[{{(CN)}_{2}}\]

    C) \[ICl_{2}^{-}\]

    D) \[I_{3}^{-}\]

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  • question_answer165) The element which liberates oxygen gas from water is

    A) \[P\]

    B) \[Na\]

    C) \[F\]

    D) \[I\]

    View Answer play_arrow
  • question_answer166) Which element from group V gives most basic compound with hydrogen?

    A) Nitrogen

    B) Bismuth

    C) Arsenic

    D) Phosphorus

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  • question_answer167) Which is the weakest acid out of \[HF,\] \[HCl,\] \[HBr\]and\[HI\]?

    A) \[HF\]

    B) \[HCl\]

    C) \[HBr\]

    D) \[HI\]

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  • question_answer168) The molecular formula of bleaching powder is

    A) \[CaC{{l}_{2}}\]

    B) \[C{{a}_{2}}OC{{l}_{2}}\]

    C) \[CaOC{{l}_{2}}\]

    D) \[CaC{{l}_{2}}.CaOCl\]

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  • question_answer169) The strongest oxidising agent amongst \[{{F}_{2}},\] \[C{{l}_{2}};\]\[B{{r}_{2}}\] and \[{{I}_{2}}\] is

    A) \[{{F}_{2}}\]

    B) \[{{I}_{2}}\]

    C) \[C{{l}_{2}}\]

    D) \[B{{r}_{2}}\]

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  • question_answer170) Point out in which of the following properties oxygen differs from the rest of the members of its family (Group-VIA)?

    A) High value of ionisation energies

    B) Oxidation states (2, 4, 6)

    C) Polymorphism

    D) Formation of hydrides

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  • question_answer171) Which of the following properties increases on going down from F to I in group VII-A of the periodic table?

    A) Electronegativity

    B) Volatile nature

    C) Ionic radius

    D) Oxidising power

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  • question_answer172) The oxidation state of oxygen is zero in

    A) \[CO\]

    B) \[{{O}_{3}}\]

    C) \[S{{O}_{2}}\]

    D) \[{{H}_{2}}{{O}_{2}}\]

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  • question_answer173) A solution of sodium metal in liquid ammonia is a strong reducing agent due to the presence of

    A) sodium atoms

    B) sodium hydride

    C) sodium amide

    D) solvated electron

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  • question_answer174) A mixture containing \[C{{u}^{2+}}\] and \[N{{i}^{2+}}\] can be separated for identification by

    A) passing \[{{H}_{2}}S\] in acid medium

    B) passing \[{{H}_{2}}S\] in alkaline medium

    C) passing \[{{H}_{2}}S\] in neutral medium

    D) passing \[{{H}_{2}}S\] in dry mixture

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  • question_answer175) The indicator used in the titration of acetic add with sodium hydroxide for quantitative estimation is

    A) phenolphthalein

    B) methyl orange

    C) methyl red

    D) a mixture of methyl red and methyl orange

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  • question_answer176) A compound has the empirical formula \[C{{H}_{2}}O\]. Its vapour density is 30. Its molecular formula is

    A) \[{{C}_{2}}{{H}_{4}}{{O}_{2}}\]

    B) \[{{C}_{2}}{{H}_{6}}O\]

    C) \[{{C}_{2}}{{H}_{6}}{{O}_{2}}\]

    D) \[{{C}_{2}}{{H}_{4}}O\]

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  • question_answer177) The IUPAC name of the compound \[C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,H-\underset{{{C}_{2}}{{H}_{5}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\]is

    A) \[2-ethyl-3-methyl\text{ }butane\]

    B) \[2,3-dimethyl\text{ }pentane\]

    C) \[2-methyl-3-ethyl\text{ }butane\]

    D) \[3,4-dimethyl\text{ }pentane\]

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  • question_answer178) Out of the following fractions of petroleum the one having the lowest boiling point is

    A) kerosene oil

    B) diesel oil

    C) gasoline

    D) heavy oil

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  • question_answer179) Coordination number of Fe in the complexes \[{{[Fe{{(CN)}_{6}}]}^{4-}},{{[Fe{{(CN)}_{6}}]}^{3-}}\]and \[{{[FeC{{l}_{4}}]}^{-}}\] would be respectively

    A) \[6,3,4\]

    B) \[6,6,4\]

    C) \[2,3,3\]

    D) \[6,4,6\]

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  • question_answer180) Methoxy methane and ethanol are

    A) functional isomers

    B) chain isomers

    C) optical isomers

    D) geometrical isomers

    View Answer play_arrow
  • question_answer181) Most stable ion is

    A) \[{{C}_{6}}{{H}_{5}}CH_{2}^{+}\]

    B) \[{{(C{{H}_{3}})}_{3}}-{{C}^{+}}\]

    C) \[{{(C{{H}_{3}})}_{2}}C{{H}^{+}}\]

    D) \[C{{H}_{3}}CH_{2}^{+}\]

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  • question_answer182) Formation of 2-butene as major product by dehydration of 2-butanol is according to

    A) Markownikoff?s rule

    B) Saytzeffrule

    C) Peroxide effect

    D) Anti-Markownikoff?s rule

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  • question_answer183) \[64\text{ }g\]of an organic compound contains \[24\text{ }g\]of carbon, \[\text{8 }g\] of hydrogen and the rest oxygen. The empirical formula of the compound is

    A) \[C{{H}_{2}}O\]

    B) \[{{C}_{2}}{{H}_{4}}O\]

    C) \[C{{H}_{4}}O\]

    D) \[{{C}_{2}}{{H}_{8}}{{O}_{2}}\]

    View Answer play_arrow
  • question_answer184) \[[Pt{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]B{{r}_{2}}\] and \[[Pt{{(N{{H}_{3}})}_{4}}B{{r}_{2}}]C{{l}_{2}}\] are related to each other as

    A) optical isomers

    B) coordinate isomers

    C) ionisation isomers

    D) linkage isomers

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  • question_answer185) Which one of the following substances is used as an anti-knock compound?

    A) Tetra ethyl lead

    B) Lead tetrachloride

    C) Lead acetate

    D) Ethyl acetate

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  • question_answer186) How many isomeric butanes are there?

    A) \[2\]

    B) \[3\]

    C) \[4\]

    D) \[5\]

    View Answer play_arrow
  • question_answer187) Ethene gives with acidic \[KMn{{O}_{4}}\] solution

    A) ethylene glycol

    B) ethylene oxide

    C) formaldehyde

    D) acetaldehyde

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  • question_answer188) Which of the following is an organo-metallic compound?

    A) Lithium ethoxide

    B) Ethyl lithium

    C) Lithium acetate

    D) Lithium carbide

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  • question_answer189) When phenol is distilled with \[Zn\] dust it gives

    A) benzaldehyde

    B) benzoic acid

    C) toluene

    D) benzene

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  • question_answer190) Ethane is formed by the reaction of methyl iodide and sodium metal in dry ether solution. This reaction is known as

    A) Clemmensen's reduction

    B) Kolbe's reaction

    C) Wurtz reaction

    D) Cannizaro's reaction

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  • question_answer191) At normal room temperature iodoform is

    A) volatile liquid

    B) thick viscous liquid

    C) gas

    D) solid

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  • question_answer192) The compound added to prevent chloroform to form phosgene gas (poisonous gas) is

    A) \[C{{H}_{3}}COOH\]

    B) \[C{{H}_{3}}OH\]

    C) \[C{{H}_{3}}COC{{H}_{3}}\]

    D) \[{{C}_{2}}{{H}_{5}}OH\]

    View Answer play_arrow
  • question_answer193) The formula of freon-12 is

    A) \[CCl{{F}_{3}}\]

    B) \[C{{H}_{2}}C{{l}_{2}}\]

    C) \[CC{{l}_{2}}{{F}_{2}}\]

    D) \[C{{H}_{2}}{{F}_{2}}\]

    View Answer play_arrow
  • question_answer194) The reaction of benzaldehyde with alkali gives

    A) phenol + sodium benzoate

    B) benzene + benzyl alcohol

    C) benzyl alcohol + sodium benzoate

    D) phenol + benzene

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  • question_answer195) The reaction \[{{C}_{2}}{{H}_{5}}ONa+Br{{C}_{2}}{{H}_{5}}\xrightarrow{{}}\]\[{{C}_{2}}{{H}_{5}}-O-{{C}_{2}}{{H}_{5}}+NaBr\]is called

    A) Frank land reaction

    B) Wurtz reaction

    C) Williamson's synthesis

    D) Cannizaro reaction

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  • question_answer196) Diethyl ether on heating with cone. HI gives two moles of

    A) ethyl iodide

    B) ethanol

    C) iodoform

    D) methyl iodide

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  • question_answer197) Positive Fehling test is shown by

    A) acetaldehyde

    B) acetone

    C) benzaldehyde

    D) acetophenone

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  • question_answer198) \[RCON{{H}_{2}}+B{{r}_{2}}+KOH\xrightarrow{{}}\text{Amine}\]This reaction is

    A) Carbyl amine reaction

    B) Mustard oil reaction

    C) Hofmann bromide reaction

    D) Cannizzaro reaction

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  • question_answer199) Which of the following is reducing agent?

    A) \[LiAl{{H}_{4}}\]

    B) \[Zn+HCl\]

    C) \[Sn+HCl\]

    D) All of these

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  • question_answer200) Reduction of an aldehyde gives

    A) primary alcohol

    B) monocarboxylic acid

    C) secondary alcohol

    D) tertiary alcohol

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  • question_answer201) Cells of the epithelial tissue rest on a basement membrane, which is made up of

    A) mono saccharides

    B) muco polysaccharides

    C) disaccharides

    D) lipids

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  • question_answer202) The cells of a tissue are similar in

    A) structure

    B) function

    C) origin

    D) Both [a] and [b]

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  • question_answer203) The intercellular matrix is negligible or absent in which of the following tissues?

    A) Connective tissue

    B) Epithelial tissue

    C) Muscular tissue

    D) Cardiac tissue

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  • question_answer204) The basement membrane acts as

    A) plasma membrane

    B) plasmalemma

    C) Both [a] and [b]

    D) None of these

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  • question_answer205) The filaments arising from desmosomes are called

    A) tonofibril

    B) tonofilament

    C) Both [a] and [b]

    D) None of these

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  • question_answer206) Pseudo stratified epithelium is always

    A) single layered

    B) double layered

    C) multilayered

    D) uncertain

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  • question_answer207) Most of the glands of the body are of

    A) holocrine type

    B) merocrine type

    C) apocrine type

    D) None of these

    View Answer play_arrow
  • question_answer208) Pyruvic acid before combining with oxaloaceric acid of Krebs' cycle becomes

    A) lactic acid

    B) acetoacetic acid

    C) cis-aconitic acid

    D) acetyl Co-A

    View Answer play_arrow
  • question_answer209) Dissociation curve shifts to the right when

    A) \[C{{O}_{2}}\] concentration decreases

    B) \[C{{O}_{2}}\]concentration increases

    C) \[{{O}_{2}}\]concentration decreases

    D) \[\text{C}{{\text{l}}^{-}}\] concentration increases

    View Answer play_arrow
  • question_answer210) Which of the following glands is present in frog's skin and not in rabbit's skin?

    A) Sebaceous gland

    B) Sweat gland

    C) Mucous gland

    D) Moll's gland

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  • question_answer211) Cutaneous glands are

    A) gastric glands

    B) sebaceous glands

    C) thyroid gluids

    D) thymus glands

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  • question_answer212) Teeth are absent in

    A) fishes

    B) reptiles

    C) frogs

    D) turtle

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  • question_answer213) Ivory of teeth is

    A) enamel

    B) dentine

    C) Both [a] and [b]

    D) None of these

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  • question_answer214) In the gut of a mammal, haustra and taeniae are the parts of

    A) rectum

    B) colon

    C) caecum

    D) ileum

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  • question_answer215) Space between incisor and cheek teeth in rabbit is

    A) diapause

    B) diastema

    C) dialysis

    D) diapedesis

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  • question_answer216) Taste buds are absent in

    A) foliate papillae

    B) circumvallate papillae

    C) fungiform papillae

    D) fili form papillae

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  • question_answer217) Which one respires through gills ?

    A) Crocodile

    B) Whale

    C) Frog

    D) Prawn

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  • question_answer218) Fish brought out of water dies because of

    A) absence of pressure

    B) inability to respire

    C) inability to feed

    D) rise in temperature

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  • question_answer219) Skin is an accessory organ of respiration in

    A) human

    B) frog

    C) rabbit

    D) lizard

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  • question_answer220) In Pheretima, lymph glands produce

    A) phagocytic cells

    B) lymphocytic cells

    C) amoebocytic cells

    D) oxyntic cells

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  • question_answer221) How many lateral hearts are in Pheretima

    A) 4

    B) 8

    C) 16

    D) 12

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  • question_answer222) Four pairs of pulsatile heart in Pheretima are located in segments

    A) 7, 9, 12 and 13

    B) 11,14, 17 and 18

    C) 10,13,16 and 17

    D) 4, 5,10 and 13

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  • question_answer223) Open circulatory system is observed in

    A) cockroach

    B) frog

    C) fish

    D) reptiles

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  • question_answer224) Single circuit circulatory system is characteristic of

    A) fishes

    B) amphibians

    C) aves

    D) mammals

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  • question_answer225) Which of the following are uricotelic animals ?

    A) Rohu and frog

    B) Lizard and crow

    C) Camel and frog

    D) Earthworm and eagle

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  • question_answer226) In gout patients, high level of which of the following is found in blood?

    A) Urea

    B) Uric add

    C) Cholesterol

    D) Amino acid

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  • question_answer227) Excretion of nitrogenous waste products in semisolid form occurs in

    A) ureotelic animals

    B) ammonotelic animals

    C) uricotelic animals

    D) ammonites

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  • question_answer228) The phenomenon, which represents terrestrial mode (dry habitat) of life, is

    A) ammonotelism

    B) ureotelism

    C) uricotelism

    D) All of these

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  • question_answer229) Aquatic reptiles are

    A) ammonotelic

    B) ureotelic over land

    C) ureotelic

    D) ureotelic in water

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  • question_answer230) Ammonia is the chief excretory substance in

    A) camel and whale

    B) cartilaginous fishes

    C) whale and tortoise

    D) fresh water fishes

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  • question_answer231) The chief nitrogenous waste in urine of rabbit or terrestrial mammals is

    A) urea

    B) uric acid

    C) ammonia

    D) None of these

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  • question_answer232) The correct sequence of meninges from outer to the inner side is

    A) Arachnoid-piamater-duramater

    B) Arachnoid-duramater-piamater

    C) Piamater-arachnoid-duramater

    D) Duramater-arachnoid-piamater

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  • question_answer233) On the basis of body organization, animals are grouped as

    A) Metazoa and Eumetazoa

    B) Protozoa and Parazoa

    C) Parazoa and Metazoa

    D) Protozoa and Metazoa

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  • question_answer234) Which one of the following cells form the lining of brain ?

    A) Ependymal cells

    B) Neurons

    C) Schwann cells

    D) Neurilemma

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  • question_answer235) Cerebrospinal fluid is produced by

    A) ependymal cells

    B) choroid plexuses

    C) neuroglial cells

    D) neurons

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  • question_answer236) The ventricles of the brain are filled with

    A) cerebrospinal fluid

    B) lymph

    C) blood

    D) amniotic fluid

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  • question_answer237) Which one of the following phenomenon is not common to both oestrous and menstrual cycles?

    A) Growth of ovarian follicles under the influence of FSH and LH

    B) Formation of corpus luteum in the ovarian follicles.

    C) Sexual receptivity limited to a definite period in the cycle

    D) Regulation of cycles by estrogen and progesterone

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  • question_answer238) For ovulation in reflex ovulators

    A) coitus is not necessary

    B) coitus is necessary

    C) plenty of food is necessary

    D) plenty of food is not necessary

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  • question_answer239) Secondary sexual characters in females develop in response to hormone

    A) relaxin

    B) progesterone

    C) estrogen

    D) gonadotropin

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  • question_answer240) The period of restoration of uterine epithelium is called

    A) menstrual phase

    B) proliferative phase

    C) secretory or luteal phase

    D) None of the above

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  • question_answer241) Which one of the following exhibits menstruation ?

    A) Tiger

    B) Chimpanzee

    C) Civet cat

    D) None of these

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  • question_answer242) Glenoid cavity is found in

    A) pelvic girdle

    B) pectoral girdle

    C) skull

    D) humerus

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  • question_answer243) Axis vertebra is identified by

    A) olecranon process

    B) odontoid process

    C) sigmoid notch

    D) odontoblast

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  • question_answer244) When the intensity of light is low during night the light is detected by

    A) rods

    B) cones

    C) lens

    D) Both [a] and [b]

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  • question_answer245) Colourblindness results from

    A) absence of rods

    B) absence of cones

    C) absence of eyelids

    D) inverted retina

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  • question_answer246) Who is the "Father of Endocrinology" ?

    A) Whittaker

    B) Einthoven

    C) Pasteur

    D) T Addison

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  • question_answer247) Steroid is a

    A) thyroid acid

    B) vitamin-A

    C) cholesterol

    D) easter and fatty acid

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  • question_answer248) The feedback control mechanism is related with

    A) bile secretion

    B) \[\text{HCl}\]secretion

    C) hormonal secretion

    D) hering breuer reflex

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  • question_answer249) All functions of the body are regulated and integrated by

    A) respiratory system

    B) digestive system

    C) neuroendocrine system

    D) excretory system

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  • question_answer250) Which of the following does not secrete any hormone ?

    A) Ovary

    B) Testis

    C) Spleen/liver

    D) Pancreas

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  • question_answer251) The name second messenger is given to

    A) ATP

    B) Cyclic-AMP

    C) GTP

    D) Both [a] and [b]

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  • question_answer252) Endocrine glands produce or action of endocrine gland is mediated through

    A) hormones

    B) enzymes

    C) minerals

    D) vitamins

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  • question_answer253) The word 'hormone' means

    A) to move

    B) to exdte

    C) to initiate

    D) to increase

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  • question_answer254) In which of the following organisms hormones are normally absent?

    A) Monkey

    B) Cat

    C) Cockroach

    D) Bacteria

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  • question_answer255) Which of the following vitamins is Necessary for blood clotting ?

    A) Vitamin-A

    B) Vitamin-E

    C) Vitamin-C

    D) Vitamin-K

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  • question_answer256) Deficiency of vitamin-'C' causes

    A) beri beri

    B) rickets

    C) scurvy

    D) night blindness

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  • question_answer257) The hardest substance of vertebrate body is

    A) keratin

    B) enamel

    C) dentine

    D) chondrin

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  • question_answer258) The term blastocyst is applied to the blastula of which one of the following ?

    A) Kangaroo

    B) Platypus

    C) Monkey

    D) Both [a] and [b]

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  • question_answer259) Substances synthesized during growth are

    A) protoplasmic

    B) apoplasmic

    C) Both [a] and [b]

    D) nucleic acid

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  • question_answer260) Growth in the first 10-13 years of age is controlled by

    A) somatotrophic hormone

    B) thyroxin

    C) thymosin

    D) gonadotropic hormone

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  • question_answer261) In old age, there is decrease in amount of urine output and difficulty in micturition it is due to

    A) increase in number of nephrons

    B) increase in glomerular filtration

    C) decrease in number of nephrons and glomerular filtration

    D) Both [a] and [b]

    View Answer play_arrow
  • question_answer262) Growth is an irreversible process seen at all organizational levels. It consists of

    A) organ growth

    B) subcellular growth

    C) cell growth

    D) All of the above

    View Answer play_arrow
  • question_answer263) When growth takes place only by increase in volume of existing cells it is called as

    A) auxetic growth

    B) multiplicative growth

    C) accretionary growth

    D) differential growth

    View Answer play_arrow
  • question_answer264) The following cells cannot be grown under tissue culture conditions

    A) hela cells

    B) leucocytes

    C) kidney cells

    D) nerve cells

    View Answer play_arrow
  • question_answer265) Growth in most warm blooded vertebrates is

    A) determinate

    B) indeterminate

    C) uncontrolled

    D) None of these

    View Answer play_arrow
  • question_answer266) Wilkins X-ray diffraction showed the diameter of the DNA helix as

    A) \[10\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    B) \[20\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    C) \[30\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    D) \[40\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    View Answer play_arrow
  • question_answer267) The number of autosomes in man is

    A) 22 pairs

    B) 11 pairs

    C) 43 pairs

    D) 23 pairs

    View Answer play_arrow
  • question_answer268) A normal metaphase chromosome with a middle centromere is

    A) metacentric

    B) sub-metacentric

    C) acrocentric

    D) telocentric

    View Answer play_arrow
  • question_answer269) Lampbrush chromosomes are found inside

    A) salivary glands of Drosophila

    B) salivary glands of silk moth

    C) oocytes of frog

    D) nucleus of man

    View Answer play_arrow
  • question_answer270) Depending upon size and centromere position the 46 chromosomes have been divided into a number of groups

    A) 6

    B) 5

    C) 7

    D) 10

    View Answer play_arrow
  • question_answer271) Chromosome number is

    A) fixed for a species

    B) fixed for an ecosystem

    C) fixed for a community

    D) fixed for a biosphere

    View Answer play_arrow
  • question_answer272) The twenty third pair of chromosomes in man is known as

    A) chromatid

    B) heterosome

    C) autosome

    D) gene

    View Answer play_arrow
  • question_answer273) The careers of hereditary material are

    A) chromosomes

    B) gene

    C) gametes

    D) gametocytes

    View Answer play_arrow
  • question_answer274) In man, the normal number of chromosomes are

    A) 42

    B) 44

    C) 46

    D) 48

    View Answer play_arrow
  • question_answer275) The genetic material of virus is

    A) DNA

    B) RNA

    C) Both [a] and [b]

    D) DNA or RNA

    View Answer play_arrow
  • question_answer276) The chromosomes as thread like structures in nucleus was first described by

    A) Mendel

    B) Strasburger

    C) Darwin

    D) Levitzky

    View Answer play_arrow
  • question_answer277) Genes are made up of

    A) histones

    B) lipoproteins

    C) polynucleotides

    D) hydrocarbons

    View Answer play_arrow
  • question_answer278) The function of chromosomes of carrying the genetic information from one cell generation to another is performed by

    A) RNA

    B) DNA

    C) histones

    D) calcium

    View Answer play_arrow
  • question_answer279) In chromosomes, the material controlling heredity is

    A) DNA

    B) histones

    C) chromocentres

    D) RNA

    View Answer play_arrow
  • question_answer280) Sex ratio in a species indicates the numerical relation between the number of

    A) male and female producing gametes

    B) black and white

    C) unisexual and bisexual

    D) None of the above

    View Answer play_arrow
  • question_answer281) The aggregate of processes that determine the size and composition of any population is called

    A) population dispersal

    B) population dynamics

    C) population explosion

    D) population density

    View Answer play_arrow
  • question_answer282) Intracellular digestion is found in the

    A) protozoans only

    B) porifers only

    C) in some coelenterates only

    D) All of the above

    View Answer play_arrow
  • question_answer283) Radial symmetry is usually exhibited in an which

    A) have one opening of alimentary canal

    B) have colliery mode of feeding

    C) are attached to the substratum

    D) live in water

    View Answer play_arrow
  • question_answer284) Absence of excretory organs, great power regeneration and exclusively marine animals belong to the phylum

    A) Mollusca

    B) Echinodermata

    C) Fishes

    D) Arthropoda

    View Answer play_arrow
  • question_answer285) Select the correct statement

    A) birds are poikilothermic

    B) flatworms are coelomic animal

    C) earthworm is metameric ally segmented

    D) fishes are radially symmetrical

    View Answer play_arrow
  • question_answer286) Characteristic features such as four-chambered heart, feather and pneumatic bone is applicable to the class of vertebrate

    A) Cyclostomata

    B) Aves

    C) Reptilia

    D) Mammalia

    View Answer play_arrow
  • question_answer287) Which of the following animals is predaceous

    A) Pheretima

    B) Nereis

    C) Hirudinaria

    D) None of these

    View Answer play_arrow
  • question_answer288) Taxon is the

    A) name of a taxonomy journal

    B) name of a branch of taxonomy

    C) a rank of classification as phylum, class, order, species

    D) group of similarly constituted organisms

    View Answer play_arrow
  • question_answer289) Which of the following is the oldest living fossil?

    A) Architeuthis

    B) Neopilina

    C) Nautilus

    D) Limulus

    View Answer play_arrow
  • question_answer290) The non-nucleated, unicellular organisms of Whittaker's (1969) classification are included in the kingdom

    A) Protista

    B) Monera

    C) Animalia

    D) Plantae

    View Answer play_arrow
  • question_answer291) In human evolution, which is most recent?

    A) Middle paleolithic

    B) Upper Paleolithic

    C) Neolithic

    D) Mesolithic

    View Answer play_arrow
  • question_answer292) The concept of sudden genetic change, which breeds true in a species is represented as

    A) inheritance of acquired characters

    B) natural selection

    C) law of inheritance

    D) mutation

    View Answer play_arrow
  • question_answer293) Silkworm is a

    A) fly

    B) worm

    C) moth

    D) beetle

    View Answer play_arrow
  • question_answer294) Who is referred to as father of pearl industry ?

    A) Iwanovsky

    B) Louis Pasteur

    C) Kokichi Mikimoto

    D) Harvey

    View Answer play_arrow
  • question_answer295) The biological name of the Java man is

    A) Homo erectus

    B) Homo sapiens

    C) Homo habilis

    D) Pithecanthropus erectus

    View Answer play_arrow
  • question_answer296) plasmodium in man is in no cleated by

    A) Anopheles male

    B) Anopheles female

    C) Both [a] and [b]

    D) Culex female

    View Answer play_arrow
  • question_answer297) Smoking addiction is harmful because it produces polycyclic aromatic hydrocarbons which cause

    A) reduction in oxygen transport

    B) increase in blood pressure

    C) cancer

    D) retardation of growth of foetus

    View Answer play_arrow
  • question_answer298) Alcohol addiction is harmful because it causes

    A) protein depositions in liver

    B) deposition of extra fat in liver

    C) rise in blood sugar level

    D) cancer

    View Answer play_arrow
  • question_answer299) In which state is the Kanha National Park?

    A) Rajasthan

    B) Uttar Pradesh

    C) Madhya Pradesh

    D) Assam

    View Answer play_arrow
  • question_answer300) The lion tailed monkeys Malaca silenus are found only in these regions

    A) Kaziranga and other pans of Assam

    B) Eastern ghats and Chennai

    C) Western ghats including Travancore Mysore

    D) Himalayan mountains

    View Answer play_arrow
  • question_answer301) The resolution of light microscope could be improved to 1.5 times by using.

    A) Red light and immersion oil between the specimen and objective

    B) Blue light and glycerine between the specimen and objective

    C) Blue light and immersion oil between specimen and objective

    D) Day light and air between specimen and objective

    View Answer play_arrow
  • question_answer302) Separation of proteins on the basis of their being polyelectrolytes can be brought about by

    A) centrifugation

    B) electrophoresis

    C) chromatography

    D) crystallography

    View Answer play_arrow
  • question_answer303) Taylor (1958) studied chromosome replication by using radioactive

    A) uridine

    B) thymidine

    C) histones

    D) phosphate

    View Answer play_arrow
  • question_answer304) The amount of which of the following elements greatest in protoplasm

    A) hydrogen

    B) oxygen

    C) nitrogen

    D) carbon

    View Answer play_arrow
  • question_answer305) Normal pH of protoplasm is

    A) 7.8

    B) 6.8

    C) 5

    D) 6.5

    View Answer play_arrow
  • question_answer306) The theory strongly advocating the morphological nature of protoplasm is

    A) granular theory of Altmann

    B) fibrical theory of Flemming

    C) nuclear theory of Altmann

    D) colloidal theory of Wilson Fischer and Hardy

    View Answer play_arrow
  • question_answer307) In rotation type of cyclosis, the cytoplasmic matrix flows in

    A) one direction

    B) two opposite directions

    C) different directions

    D) side wise

    View Answer play_arrow
  • question_answer308) The function of centrosome is

    A) to inhibit cell division

    B) to initiate cell division

    C) to increase protein synthesis

    D) None of the above

    View Answer play_arrow
  • question_answer309) At which stage of mitosis, chromatids separate and start moving towards poles?

    A) Prophase

    B) Metaphase

    C) Anaphase

    D) Telophase

    View Answer play_arrow
  • question_answer310) Micro bodies differ from lysosomes in that

    A) micro bodies are surrounded by a single unit membrane, while lysosome membrane is double

    B) micro bodies are surrounded by double membrane, while lysosome membrane is single unit

    C) micro bodies contain lytic enzymes, while lysosomes do not

    D) lysosomes contain lytic enzymes, while micro bodies do not

    View Answer play_arrow
  • question_answer311) The haploid complement of chromosomes of an organism constitutes

    A) genome

    B) genotype

    C) phenotype

    D) genetic system

    View Answer play_arrow
  • question_answer312) The cross used to ascertain whether the plant is homozygous or heterozygous is

    A) linkage cross

    B) reciprocal cross

    C) test cross

    D) monohybrid cross

    View Answer play_arrow
  • question_answer313) The dihybrid ratio in \[{{F}_{2}}\] generation is

    A) 1: 1: 1 : 1

    B) 2 : 1: 2

    C) 3 :1

    D) 9 : 3 : 3 :1

    View Answer play_arrow
  • question_answer314) Which of the following trait of garden pea studied by Mendel was recessive feature?

    A) Round seed shape

    B) Axial flower position

    C) Green seed colour

    D) Green pod colour

    View Answer play_arrow
  • question_answer315) Which of the following scientist rediscovered Mendel's theory ?

    A) T H Morgan

    B) W Bateson

    C) E Strasburger

    D) E Von Tschermak

    View Answer play_arrow
  • question_answer316) Which of the following is an example of pleiotropic gene ?

    A) Thalassemia

    B) Haemophilia

    C) Colour blindness

    D) Sickle cell anaemia

    View Answer play_arrow
  • question_answer317) By double fertilization, is formed

    A) endosperm

    B) megaspore

    C) seed

    D) fruit

    View Answer play_arrow
  • question_answer318) In split genes, the coding sequences are called

    A) cistrons

    B) operons

    C) exons

    D) introns

    View Answer play_arrow
  • question_answer319) Extra nuclear genes occur in

    A) plastids and inherited

    B) plasmid and not inherited

    C) mitochondria and inherited by male

    D) mitochondria and inherited by female

    View Answer play_arrow
  • question_answer320) How many different types of genetically different gametes will be produced by a heterozygous plant having the genotype AA Bb Cc ?

    A) Two

    B) Four

    C) Six

    D) Nine

    View Answer play_arrow
  • question_answer321) Drosophila melanogaster has

    A) 2 pairs of autosomes and 1 pair of as chromosomes

    B) 3 pairs of autosomes and 1 pair of as chromosomes

    C) 1 pair of autosome and 3 pairs of sea chromosomes

    D) 2 pairs of autosomes and 2 pairs of sea chromosomes

    View Answer play_arrow
  • question_answer322) The four daughter cells derived from a single meiosis differ from each other due to

    A) difference in chromosome number

    B) crossing over only

    C) independent assortment of chromosomes

    D) crossing over as well as independent assortment of chromosomes

    View Answer play_arrow
  • question_answer323) In which kingdom, would you classify the archaea and nitrogen fixing organisms, if the five kingdom system of classification is used ?

    A) Plantae

    B) Fungi

    C) Protista

    D) Monera

    View Answer play_arrow
  • question_answer324) Which one of the following is correct for structure of cell wall of fungi and bacteria?

    A) Both have glycopeptide

    B) Both are made up of N-acetyl glycosamine

    C) Both are made up of N-acetyl muramic acid

    D) Both are made up of chitin

    View Answer play_arrow
  • question_answer325) Muramic acid is present in the cell wall of

    A) bacteria

    B) green algae

    C) red algae

    D) Rhizopus

    View Answer play_arrow
  • question_answer326) Most of the bacteria can tolerate high temperature due to

    A) type of cell wall

    B) cell organization

    C) homopolar bonds in their proteins

    D) absence of phospholipids in their walls

    View Answer play_arrow
  • question_answer327) For reproduction, endospores are formed in the following genera

    A) Bacillus and Clostridium

    B) Mucor and Bacillus

    C) Mono coccus and Clostridium

    D) Saccharomyces and Clostridium

    View Answer play_arrow
  • question_answer328) Plasmids are ideal vectors for gene cloning as they

    A) can be multiplied in a laboratory using enzymes

    B) can be multiplied by culturing

    C) are self-replicating

    D) replicate freely outside the bacterial cells

    View Answer play_arrow
  • question_answer329) Root nodules for nitrogen fixation in non leguminous trees are produced by species of the genus

    A) Rhizobium

    B) Azotobacter

    C) Frankia

    D) Thiobacillus

    View Answer play_arrow
  • question_answer330) Activity of one of the following bacteria is very helpful in the preparation and flavouring of tea leaves

    A) Bacillus subtilis

    B) Bacillus megatherium

    C) Bacillus aceti

    D) Bacillus radicicola

    View Answer play_arrow
  • question_answer331) Why surgical instruments are boiled in water before use?

    A) For killing the pathogens present on them

    B) So that doctors can use them easily

    C) Provides pleasure to the patient

    D) All the saprophytes die on the operative surface

    View Answer play_arrow
  • question_answer332) Pasteurization of milk involves heating for

    A) 60 minute at about

    B) 60 minute at about

    C) 30 minute at about

    D) 30 minute at about

    View Answer play_arrow
  • question_answer333) Which kingdom incorporates photoautotrophs, chemoautotrophs and heterotrophs?

    A) Monera

    B) Protista

    C) Plantae

    D) Both [b] and [c]

    View Answer play_arrow
  • question_answer334) Blue-green algae are placed in the kingdom

    A) Plantae

    B) Protista

    C) Fungi

    D) Monera

    View Answer play_arrow
  • question_answer335) 35. Protozoan, Protista are differentiated on the basis of

    A) Nuclei

    B) size

    C) shape

    D) locomotory structures

    View Answer play_arrow
  • question_answer336) Endoparasitic protistan protozoans belong to

    A) Sporozoa

    B) Ciliata

    C) Sarcodina

    D) Mastigophora

    View Answer play_arrow
  • question_answer337) The winged pollen grains are the characteristic feature of

    A) Cycas

    B) Ephedra

    C) Gnetum

    D) Pinus

    View Answer play_arrow
  • question_answer338) What is the similarity between gymnospenns and angiosperms?

    A) Phloem of both have companian cells

    B) Endosperm is formed before fertilization in both

    C) Origin of ovule and seed is similar in both

    D) Both have leaves, stem and roots

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  • question_answer339) Circinate venation is found in

    A) Cycas

    B) Fern

    C) Both [a] and [b]

    D) None of these

    View Answer play_arrow
  • question_answer340) In gymnosperm, the endosperm is

    A) haploid

    B) diploid

    C) triploid

    D) None of these

    View Answer play_arrow
  • question_answer341) Primitive types of stomata are found in the

    A) leaves of moss plant

    B) axis of the moss plant

    C) apophysis of capsule of moss

    D) All of the above

    View Answer play_arrow
  • question_answer342) Paraphysis in moss are

    A) one celled and club shaped

    B) multicelled and club shaped

    C) one celled and bottle shaped

    D) multicelled and bottle shaped

    View Answer play_arrow
  • question_answer343) The development of a sporophyte without fertilization from the vegetative cells of the gametophyte is called

    A) zygospory

    B) aplanospory

    C) apospory

    D) apogamy

    View Answer play_arrow
  • question_answer344) One of the following is not a method of asexual reproduction

    A) cutting

    B) grafting

    C) budding

    D) conjugation

    View Answer play_arrow
  • question_answer345) In Capsella, meiosis takes place during

    A) development of pollen grains

    B) development of egg

    C) gemination of zygote

    D) development of ovule

    View Answer play_arrow
  • question_answer346) Generally archesporium in an ovule is

    A) single celled and hypodermal in origin

    B) single celled and lies in the centre of the ovule

    C) single celled and terminal in origin

    D) many celled and lie in the centre

    View Answer play_arrow
  • question_answer347) When the pollen grains are not transferred from anthers to the stigma in flower due to the barrier of fence, it is referred as or when some natural barriers, exist between androecium and gynoecium to check self pollination, it is known as

    A) heterostyly

    B) herkogamy

    C) dichogamy

    D) cleistogamy

    View Answer play_arrow
  • question_answer348) Aerenchyma is found in

    A) lithophytes

    B) hydrophytes

    C) sciophytes

    D) xerophytes

    View Answer play_arrow
  • question_answer349) Collenchyma differs from sclerenchyma

    A) retaining protoplasm at maturity

    B) having thick walls

    C) having wide lumen

    D) being meristematic

    View Answer play_arrow
  • question_answer350) Water stomata are found in

    A) plants inhabiting humid region

    B) plants inhabiting dry regions

    C) all plants

    D) plants lacking normal stomata

    View Answer play_arrow
  • question_answer351) Multiple epidermis on dorsal and ventral side of the leaf is found in

    A) Zea mays

    B) Triticum aestivum

    C) Mangifera indica

    D) Nerium oleander

    View Answer play_arrow
  • question_answer352) The axillary buds arise

    A) endogenously from the pericycle

    B) exogenously from the tissues of the main growing point

    C) endogenously from the cambial tissues

    D) exogenously from the innermost cortex

    View Answer play_arrow
  • question_answer353) Potassium is useful in development of

    A) fibre

    B) pith

    C) parenchyma

    D) None of these

    View Answer play_arrow
  • question_answer354) Plants absorb sulphur in the form of

    A) \[S{{O}_{4}}\] from soil

    B) \[S{{O}_{2}}\] from air

    C) Both [a] and [b]

    D) \[S{{O}_{3}}\] from soil

    View Answer play_arrow
  • question_answer355) Grey spots of oat are caused by deficiency of

    A) Cu

    B) Zn

    C) Mn

    D) Fe

    View Answer play_arrow
  • question_answer356) Motile leaf in citrus plants is due to deficienp

    A) boron

    B) magnesium

    C) zinc

    D) None of these

    View Answer play_arrow
  • question_answer357) Nodules with nitrogen fixing bacteria present in roots of

    A) cotton

    B) gram

    C) wheat

    D) maize

    View Answer play_arrow
  • question_answer358) A pigment, which absorbed red and far-red light is

    A) phytochrome

    B) carotene

    C) cytochrome

    D) xanthophylls

    View Answer play_arrow
  • question_answer359) 85-90% of all photosynthesis of the world is carried out by

    A) shrubs

    B) herbs

    C) oceanic algae

    D) trees with large branches

    View Answer play_arrow
  • question_answer360) The role of phycobilins in photosynthes is to

    A) absorb and transfer energy to chlorophyll

    B) donate electrons to the electron transport system

    C) fix carbon dioxide

    D) carry hydrogen or electrons

    View Answer play_arrow
  • question_answer361) Chlorophyll-b differs from chlorophyll-a in the it does not

    A) CHO

    B) COOH

    C) \[C{{H}_{3}}\] and-CH

    D) None of these

    View Answer play_arrow
  • question_answer362) Plants do not store carbohydrate as glucose but do so as starch because glucose

    A) is unstable

    B) attracts herbivores

    C) will change nucleic acids

    D) alters osmotic balance

    View Answer play_arrow
  • question_answer363) If oxygen content is reduced to 1%, the rate of respiration becomes

    A) optimum

    B) minimum

    C) maximum

    D) None of these

    View Answer play_arrow
  • question_answer364) Oxidative phosphorylation is the formation of

    A) \[NADP{{H}_{2}}\] in respiration

    B) ATP in respiration

    C) \[NADP{{H}_{2}}\] in photosynthesis

    D) ATP in photosynthesis

    View Answer play_arrow
  • question_answer365) A typical anther wall has

    A) exothecium and endothecium

    B) endothecium and tapetum

    C) exothecium, endothecium and tapetum

    D) exothecium and tapetum

    View Answer play_arrow
  • question_answer366) The tissue of highest respiratory activity is

    A) meristems

    B) ground tissue

    C) phloem

    D) mechanical tissue

    View Answer play_arrow
  • question_answer367) Why do fruit juices turn bitter if kept in an open place for some time?

    A) Juices have something inside them which makes it bitter

    B) It is due to fermentation brought about by yeast cells

    C) It is due to the activity of fungi present in the atmosphere

    D) All of the above

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  • question_answer368) Which one belongs to hydrolase group?

    A) Amylase

    B) Transaminase

    C) Citrate synthetase

    D) Enolase

    View Answer play_arrow
  • question_answer369) Dry seeds can enduce higher temperature that the germinating seeds because

    A) dry seeds have more reserve food

    B) hydration makes the enzymes more sensitive to temperature

    C) dry seeds are hard

    D) the seedlings are tender

    View Answer play_arrow
  • question_answer370) Name of the enzyme that acts both as carboxylase at one time and oxygenase at another time

    A) Carbonic anhydrase

    B) PEP carboxylase

    C) RuBP carboxylase

    D) None of the above

    View Answer play_arrow
  • question_answer371) Enzymes, which act normally with in cells are ailed

    A) apoenzymes

    B) exoenzymes

    C) endoenzymes

    D) ferments

    View Answer play_arrow
  • question_answer372) A coenzyme is

    A) same enzyme that occurs in different tissues such as heart and muscle

    B) one that shares the function of other enzyme

    C) organic or inorganic in nature and helps activate metabolic enzymes

    D) organic non-protein in nature and helps to activate metabolic enzymes

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  • question_answer373) When food supply is poor, the rate of growth is

    A) fast

    B) slow

    C) intermediate

    D) nil

    View Answer play_arrow
  • question_answer374) Energy for the early growth of a developing bean embryo comes from

    A) sunlight

    B) water in the soil

    C) food in the soil

    D) leaves in the seed

    View Answer play_arrow
  • question_answer375) Plant response to environment is mainly through

    A) induction of dormancy

    B) abscission of parts

    C) synthesis of pigments

    D) growth

    View Answer play_arrow
  • question_answer376) Substances, which originate at the tip of stem, root and control the growth of different organs are

    A) enzymes

    B) hormones

    C) vitamins

    D) food substances

    View Answer play_arrow
  • question_answer377) Gibberellins induce

    A) flowering

    B) production of hydrolyzing enzymes in germinating seeds

    C) Both [a] and [c]

    D) hasten leaf senescence

    View Answer play_arrow
  • question_answer378) One of the preventive methods of fruit drop is by spraying

    A) auxin

    B) ethylene gas

    C) gibberellins

    D) cytokinin

    View Answer play_arrow
  • question_answer379) An important finding in Went's experiment was

    A) unequal distribution of elongation promoting substance in Avena coleoptile

    B) presence of elongation factor in all cells of root

    C) curvature of coleoptile is proportional to auxin concentration

    D) curvature occurred due to irregular elongation of cells

    View Answer play_arrow
  • question_answer380) A bird enters the mouth of crocodile and feed on parasitic leeches. The bird gets food and crocodile gets ribs of blood sucking leeches. Both the partners can live independently. Such an association is

    A) mutualism

    B) amensalism

    C) commensalism

    D) proto co-operation

    View Answer play_arrow
  • question_answer381) Which of the following species are restricted to a given area ?

    A) Sympatric species

    B) All opatric species

    C) Sibling species

    D) Endemic species

    View Answer play_arrow
  • question_answer382) The factor governing the structure of earth surface is

    A) topographic

    B) edaphic

    C) biotic

    D) temperature

    View Answer play_arrow
  • question_answer383) Excessive aerenchyma is characteristic of

    A) hydrophytes

    B) xerophytes

    C) mesophytes

    D) heliophytes

    View Answer play_arrow
  • question_answer384) Species are considered as

    A) real unit of classification devised by taxonomists

    B) real basic units of classification

    C) the lowest units of classification

    D) artificial concept of human mind, which cannot be defined in absolute terms

    View Answer play_arrow
  • question_answer385) Mark the correct pair

    A) plants growing in shady - heliophytes places

    B) plants growing in light - sdophytes

    C) plants growing in saline - halophytes soil

    D) roots are absent - xerophytes

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  • question_answer386) Ephemerals are xerophytes that are

    A) draught escapers

    B) true xerophytes

    C) draught resisting

    D) None of the above

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  • question_answer387) The sun loving plants are referred to as

    A) halophytes

    B) heliophytes

    C) heterotrophs

    D) heliophytes

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  • question_answer388) The lentic ecosystem includes, which of the following water?

    A) Rain

    B) Running

    C) Standing

    D) Gravitational

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  • question_answer389) Succulent xerophytes are likely to be found in

    A) tropical rain forest

    B) deciduous forest

    C) desert

    D) tundra

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  • question_answer390) Which alkaloids are present in opium ?

    A) Codeine

    B) Morphine

    C) Perthidine

    D) All of these

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  • question_answer391) Which of the following is used as local an aesthesia?

    A) Aloe

    B) Cocaine

    C) Calotropis latex

    D) None of the above

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  • question_answer392) Study of drug plants is known as

    A) Pharmacy

    B) Pharmacology

    C) Pharmacognosy

    D) Pharmaceutical chemistry

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  • question_answer393) The correct representation of the alkaloids obtained from opium is

    A) Morphine > Codeine > Pethidine

    B) Morphine < Codeine < Perthidine

    C) Morphine > Codeine > Perthidine

    D) Morphine < Codeine < Nicotine

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  • question_answer394) Cinchona plant is also known as

    A) prickly bark

    B) turmeric bark

    C) peruvian bark

    D) devil's dung bark

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  • question_answer395) Which is more suitable in jelly preparation?

    A) Sugar

    B) Salt

    C) Pectin

    D) Protein

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  • question_answer396) Botulism is a

    A) type of food poisoning due to saprophya Clostridium botulinum bacterium

    B) disease of man due to parasitic bacterium

    C) disease in various organisms

    D) disease of plants due to viruses

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  • question_answer397) In fruit preservation, which substance is used as preservative?

    A) Calcium carbonate

    B) Potassium metabisulphate

    C) Potassium nitrate

    D) Ammonium sulphate

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  • question_answer398) The main aim of plant breeding is

    A) to produce improved varieties

    B) to make soil fertile

    C) to control pollution

    D) to become more progressive

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  • question_answer399) Which cultivation method is most popular in Madhya Pradesh to cultivate rice?

    A) Intensive

    B) Dry

    C) Wet