Solved papers for Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2005

done Chhattisgarh PMT Solved Paper-2005

  • question_answer1) L, C and R represent physical quantities inductance, capacitance and resistance respectively. The combination representing dimension of frequency is

    A) LC

    B) \[{{(LC)}^{-1/2}}\]

    C) \[{{(L/C)}^{-1/2}}\]

    D) \[\text{C/L}\]

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  • question_answer2) Energy of a photon is given by \[\text{E=hv}\] where v is the number of vibrations per second and h is Planck's constant. Dimensions of Planck's constant are

    A) \[\text{ }\!\![\!\!\text{ }{{\text{M}}^{\text{0}}}{{\text{L}}^{\text{0}}}{{\text{T}}^{\text{0}}}\text{ }\!\!]\!\!\text{ }\]

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

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

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

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  • question_answer3) A particle moving with a uniform acceleration travels 24 m and 64 m in the first two consecutive intervals of 4s each. Its initial velocity is

    A) 1m/s

    B) 10m/s

    C) 5 m/s

    D) 2 m/s

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  • question_answer4) A bullet is fired with a speed of 1000 m/s in order to hit a target 100 m away. If g = 10 m/s2. The gun should be aimed

    A) directly towards the target

    B) 5 cm above the target

    C) 10 cm above the target

    D) 15 cm above the target

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  • question_answer5) A particle moves in the \[\text{xy-}\]plane under the action of a force \[\mathbf{\vec{F}}\] such that the components of its linear momentum \[\mathbf{\vec{P}}\] at any time t are \[{{P}_{x}}=2\,\cos \,t,\,{{P}_{y}}=2\,\sin \,t.\]The angle between F and p at time t is

    A) \[90{}^\circ \]

    B) \[0{}^\circ \]

    C) \[180{}^\circ \]

    D) \[30{}^\circ \]

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  • question_answer6) A uniform rope of length L, resting on a frictionless horizontal surface, is pulled at one end by a force F. The tension in the rope at a distance I from this end is

    A) F

    B) \[\frac{l}{L}F\]

    C) \[\frac{L}{l}F\]

    D) \[\left( 1-\frac{l}{L} \right)F\]

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  • question_answer7) A bicycle is in motion. The frictional force exerted by the ground on the two wheels acts

    A) backwards on the front wheel and forwards on the rear wheel

    B) forwards on the front wheel and backwards on the rear wheel

    C) backwards on both the wheel

    D) forwards on both the wheels

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  • question_answer8) If the momentum of a body increases by 50%, its kinetic energy will increase by

    A) 50%

    B) 100%

    C) 125%

    D) 150%

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  • question_answer9) In which case does the potential energy decrease?

    A) On compressing a spring

    B) On stretching a spring

    C) On moving a body against gravitational force

    D) On the rising of an air bubble in water

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  • question_answer10) A body is moved from rest along a straight line by a machine delivering constant power. The distance moved by the body in time t is proportional to

    A) \[{{t}^{1/2}}\]

    B) \[{{t}^{3/4}}\]

    C) \[{{t}^{3/2}}\]

    D) \[{{t}^{2}}\]

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  • question_answer11) The root-mean-square velocity for an ideal gas is (where the symbols have their usual meanings)

    A) \[{{v}_{rms}}=\sqrt{\frac{3MT}{R}}\]

    B) \[{{v}_{rms}}=\sqrt{\frac{3RT}{M}}\]

    C) \[{{v}_{rms}}=\sqrt{\frac{3RM}{T}}\]

    D) \[{{v}_{rms}}=\sqrt{3RMT}\]

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  • question_answer12) The radius of a rotating disc is suddenly reduced to half without any change in its mass. Then its angular velocity will be

    A) four times

    B) double

    C) half

    D) unchanged

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  • question_answer13) A heavy mass is attached to a thin wire and is whirled in a vertical circle. The wire is most likely to break

    A) when the mass is at the highest point of the circle

    B) when the mass is at the lowest point of the circle

    C) when the wire is horizontal

    D) at an angle of cos-1 (1/3) from the upward vertical

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  • question_answer14) The ratio of the weight of a man in a stationary lift and when it is moving downward with uniform acceleration \[a\] is 3 : 2. The value of \[a\] is (g = acceleration due to gravity of the earth)

    A) 3/2 g

    B) g/3

    C) 2/3 g

    D) g

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  • question_answer15) The masses and radii of the earth and moon are \[{{M}_{1}},\,{{R}_{1}}\] and \[{{M}_{2}},\,{{R}_{2}}\] respectively. Their centres are distance d apart. The minimum velocity with which a particle of mass m should be projected from a point midway between their centres so that it escapes to infinity is

    A) \[\sqrt[2]{\frac{G}{a}({{M}_{1}}+{{M}_{2}})}\]

    B) \[\sqrt[2]{\frac{2G}{a}({{M}_{1}}+{{M}_{2}})}\]

    C) \[\sqrt[2]{\frac{Gm}{a}({{M}_{1}}+{{M}_{2}})}\]

    D) \[\sqrt[2]{\frac{Gm({{M}_{1}}+{{M}_{2}})}{d({{R}_{1}}+{{R}_{2}})}}\]

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  • question_answer16) A geostationary satellite is taken from its orbit to another orbit. If the distance of the second orbit from the centre of the earth is double that of the first orbit, then its time period in the second orbit will be

    A) 4.8 h

    B) 48\[\sqrt{2}\] h

    C) 48 h

    D) 24 h

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  • question_answer17) Two wires of the same material have lengths in the ratio 1 : 2 and their radii are in the ratio 1: \[\sqrt{2}\]. If they are streched by applying equal forces, the increase in their lengths will be in the ratio

    A) 2:\[\sqrt{2}\]

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

    C) 1:1

    D) 1 : 2

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  • question_answer18) The amount of work done in forming a soap film of size \[10cm\times 10cm\] (Surface tension \[T=3\times {{10}^{-2}}N/m\]) is

    A) \[6\times {{10}^{-4}}\text{J}\]

    B) \[3\times {{10}^{-4}}\text{J}\]

    C) \[6\times {{10}^{-3}}\text{J}\]

    D) \[6\times {{10}^{-2}}\text{J}\]

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  • question_answer19) A number of water droplets each of radius r coalesce to form a bigger drop of radius R. The rise in temperature is

    A) \[\frac{3T}{RJ}\]

    B) \[\frac{3T}{rJ}\]

    C) \[\frac{3T}{J}\left( \frac{1}{r}+\frac{1}{R} \right)\]

    D) \[\frac{3T}{J}\left( \frac{1}{r}-\frac{1}{R} \right)\]

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  • question_answer20) Air is filled at \[60{}^\circ C\] in a vessel of open mouth. The vessel is heated to a temperature T so that \[\frac{1}{4}\]th part of air escapes. The value of T is

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

    B) \[444{}^\circ C\]

    C) \[333{}^\circ C\]

    D) \[171{}^\circ C\]

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  • question_answer21) The specific heat of a gas

    A) has only two values \[{{C}_{P}}\] and \[{{C}_{V}}\]

    B) has a unique value at a given temperature

    C) can have any value between 0 and \[\infty \]

    D) depends upon the mass of the gas

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  • question_answer22) The pressure of a gas is equal to

    A) the total translation kinetic energy of all the molecules in unit volume

    B) the total kinetic energy of all the molecules in unit volume

    C) two thirds of the total translational kinetic energy of all the molecules in unit volume

    D) two-thirds of the total kinetic energy of all the molecules in unit volume

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  • question_answer23) During the adiabatic expansion of 2 moles of a gas, the internal energy was found to have decreased by 100 J. The work done by the gas in this process is

    A) zero

    B) - 100 J

    C) 200 J

    D) 100 J

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  • question_answer24) Two samples A and B of a gas, initially at the same pressure and temperature, are compressed from volume V to V/2 (A isothermally and B adiabatically) the final pressure of A is

    A) greater than the final pressure of B

    B) equal to the final pressure of B

    C) less than the final pressure of B

    D) twice the final pressure of B

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  • question_answer25) When the potential energy of a particle executing simple harmonic motion is one-fourth of its maximum value during the oscillation, its displacement from the equilibrium position in terms of its amplitude \[a\] is

    A) \[a\text{/4}\]

    B) \[a\text{/3}\]

    C) \[a\text{/2}\]

    D) \[2a\text{/3}\]

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  • question_answer26) A wall has two layers A and B, each made of a different material. Both the layers have the same thickness. The thermal conductivity of the material of A is twice that of B. Under thermal equilibrium, the temperature difference across the wall is \[36{}^\circ C\]. The temperature difference across the layer A is

    A) \[6{}^\circ C\]

    B) \[12{}^\circ C\]

    C) \[18{}^\circ C\]

    D) \[24{}^\circ C\]

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  • question_answer27) The temperature of two bodies A and B are respectively \[727{}^\circ C\] and \[327{}^\circ C\]. The ratio of rates of heat radiated by them is

    A) 727:327

    B) 5 : 3

    C) 25 : 9

    D) 625 : 81

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  • question_answer28) A body takes T minutes to cool from \[62{}^\circ C\] to \[61{}^\circ C\] when the surrounding temperature is \[30{}^\circ C\]. The time taken by the body to cool from \[46{}^\circ C\] to \[45.5{}^\circ C\] is

    A) greater than T minutes

    B) equal to T minutes

    C) less than T minutes

    D) equal to T/2 minutes

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  • question_answer29) 41forks are so arranged that each produces 5 beats/s when sounded with its near fork. If the frequency of last fork is double the frequency of first fork, then the frequencies of the first and last fork are respectively

    A) 200, 400

    B) 205,410

    C) 195, 390

    D) 100, 200

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  • question_answer30) A motor car blowing a horn of frequency 124 vib/s moves with a velocity 72 km/h towards a tall wall. The frequency of the reflected sound heard by the driver will be [velocity of sound in air is 330 m/s]

    A) 109 vib/s

    B) 132 vib/s

    C) 140 vib/s

    D) 248 vib/s

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  • question_answer31) Young's experiment establishes the fact that

    A) light consists of particles

    B) light consists of waves

    C) light consists of neither particles nor waves

    D) fringe width do not depend on the separation of the two slits

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  • question_answer32) In the context of Doppler effect in light, the term red shift signifies

    A) decrease in frequency

    B) increase in frequency

    C) decrease in intensity

    D) increase in intensity

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  • question_answer33) In a concave mirror experiment, an object is placed at a distance\[{{x}_{1}}\] from the focus and the image is formed at a distance \[{{x}_{2}}\] from the focus. The focal length of the mirror would be

    A) \[{{x}_{1}}{{x}_{2}}\]

    B) \[\sqrt{{{x}_{1}}{{x}_{2}}}\]

    C) \[\sqrt{{{x}_{1}}/{{x}_{2}}}\]

    D) \[\frac{{{x}_{1}}+{{x}_{2}}}{2}\]

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  • question_answer34) Which of the following is a correct relation?

    A) \[_{\text{a}}{{\text{ }\!\!\mu\!\!\text{ }}_{\text{r}}}{{\text{=}}_{\text{a}}}{{\text{ }\!\!\mu\!\!\text{ }}_{\text{w}}}\,\text{ }\!\!\times\!\!\text{ }{{\,}_{\text{r}}}{{\text{ }\!\!\mu\!\!\text{ }}_{\text{w}}}\]                

    B) \[_{\text{a}}{{\text{ }\!\!\mu\!\!\text{ }}_{\text{r}}}{{\times }_{\text{a}}}{{\mu }_{w}}\,{{=}_{\text{w}}}{{\text{ }\!\!\mu\!\!\text{ }}_{\text{a}}}\]

    C) \[_{a}{{\text{ }\!\!\mu\!\!\text{ }}_{\text{r}}}/{{  }_{r}}{{\mu }_{a}}\,=0\]                        

    D) \[_{\text{a}}{{\text{ }\!\!\mu\!\!\text{ }}_{\text{r}}}/{{  }_{w}}{{\mu }_{r}}\,{{=}_{a}}{{\text{ }\!\!\mu\!\!\text{ }}_{w}}\]

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  • question_answer35) The focal length of a thin lens is \[f\] and the diameter of its aperture is d. This makes an image of brightness \[I\]. If the central portion of the aperture be covered upto d/2 diameter by an opaque paper, then the focal length and the brightness of image would respectively be

    A) \[f\text{/2}\,\text{and}\,\text{I/2}\]

    B) \[f\,\text{and}\,\text{I/4}\]

    C) \[f\text{/2}\,\text{and}\,\text{I/4}\]

    D) \[f\,\text{and}\,3\text{I/4}\]

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  • question_answer36) Fraunhofer lines are an example of

    A) continuous spectrum

    B) band spectrum

    C) emission spectrum

    D) absorption spectrum

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  • question_answer37) The reason for shining of air bubble in water is

    A) diffraction of light

    B) dispersion of light

    C) scattering of light

    D) total internal reflection of light

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  • question_answer38) The dispersive powers of glasses of lenses used in an achromatic pair are in the ratio 5:3. If the focal length of the concave lens is 15 cm, then the nature and focal length the other lens would be

    A) convex, 9 cm

    B) convex, 9 cm

    C) convex, 25 cm

    D) convex, 25 cm

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  • question_answer39) White light is passed through a prism whose angle is \[5{}^\circ \]. If the refractive indices for rays of red and blue colors are respectively 1.64 and 1.66, the angle of deviation between the two colors will be

    A) 0.1 degree

    B) 0.2 degree

    C) 0.3 degree

    D) 0.4 degree

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  • question_answer40) The resolving limit of healthy eye is about

    A) \[1'\]

    B) \[1''\]

    C) \[1{}^\circ \]

    D) \[\frac{1}{60}''\]

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  • question_answer41) While viewing a distant object with a telescope suddenly a housefly sits on objective lens. The correct statement is that

    A) housefly will be seen enlarged in image

    B) housefly will be seen reduced in image

    C) intensity of image will be decreased

    D) intensity of image will be increased

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  • question_answer42) An object of height 1.5 cm is placed on the axis of a convex lens of focal length 25 cm. A real image is formed at a distance of 75 cm from the lens. The size of the image will be

    A) 4.5cm

    B) 3.0cm

    C) 0.75cm

    D) 0.5cm

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  • question_answer43) Work function of a metal is 2.51 eV. Its threshold frequency is

    A) \[5.9\times {{10}^{14}}cycle/s\]

    B) \[6.5\times {{10}^{14}}cycle/s\]

    C) \[9.4\times {{10}^{14}}cycle/s\]

    D) \[6.08\times {{10}^{14}}cycle/s\]

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  • question_answer44) Energy conversion in a photoelectric cell takes place from

    A) chemical to electrical

    B) magnetic to electrical

    C) optical to electrical

    D) mechanical to electrical

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  • question_answer45) The momentum of a photon in an X-ray beam of \[{{10}^{-10}}m\] wavelength is

    A) \[1.5\times {{10}^{-23}}kg-m/s\]

    B) \[6.6\times {{10}^{-24}}kg-m/s\]

    C) \[6.6\times {{10}^{-44}}kg-m/s\]

    D) \[2.2\times {{10}^{-52}}kg-m/s\]

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  • question_answer46) The rest energy of an electron is 0.511 MeV The electron is accelerated from rest to a velocity 0.5 c. 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_answer47) X-rays from X-ray tube

    A) will be monochromatic

    B) will have all possible wavelengths less than a certain longest wavelength

    C) will have all possible wavelengths greater than a certain shortest wavelength

    D) will have all wavelengths between the longest and the shortest wavelength

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  • question_answer48) X-ray beam of intensity \[{{I}_{0}}\] passes through absorption plate of thickness d. If absorption coefficient of material of plate is u, the correct statement regarding the transmitted intensity \[I\] of X-ray is

    A) \[I={{I}_{0}}(1-{{e}^{-\mu d}})\]

    B) \[I={{I}_{0}}{{e}^{-\mu d}}\]

    C) \[I={{I}_{0}}e(1-{{e}^{-\mu /d}})\]

    D) \[I={{I}_{0}}{{e}^{-\mu /d}}\]

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  • question_answer49) At zero kelvin a piece of germanium

    A) becomes semiconductor

    B) becomes good conductor

    C) becomes bad conductor

    D) has maximum conductivity

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  • question_answer50) Electronic configuration of germanium is 2, 8, 18 and 4. To make it extrinsic semiconductor small quantity of antimony is added

    A) the material obtained will be n-type germanium in which electrons and holes are equal in number

    B) the material obtained will be p-type germanium

    C) the material obtained will be n-type germanium which has more electrons then holes at room temperature

    D) the material obtained will be n-type germanium which has less electrons than holes at room temperature

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  • question_answer51) A semiconductor is cooled from \[T{{  }_{1}}\]K to \[T{{  }_{2}}\]K its resistance

    A)  will decrease

    B)  will increase

    C)  will first decrease and then increase

    D)  will not change

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  • question_answer52) In a hydrogen atom an electron moves in a circular orbit of radius \[5.2\times {{10}^{-11}}m\] and produces a magnetic induction of 12.56 T at its nucleus. The current produced by the motion of the electron will be (Given \[{{\mu }_{0}}=4\pi \times {{10}^{-7}}\] Wb/ Am)

    A) \[6.53\times {{10}^{-}}\text{A}\]

    B) \[13.25\times {{10}^{-10}}\text{A}\]

    C) \[9.6\times {{10}^{6}}\text{A}\]

    D) \[1.04\times {{10}^{-3}}\text{A}\]

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  • question_answer53) The \[{{K}_{\alpha }}\] line for molybdenum (atomic no. = 42) has a wavelength of \[0.7078\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]. The wavelength of\[{{K}_{\alpha }}\] line of zinc (atomic no. = 30) will be

    A) \[1\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    B) \[1.388\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    C) \[0.3541\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    D) \[0.5\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

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  • question_answer54) In a hydrogen atom, which of the following electronic transitions would involve the maximum energy change?

    A) from n = 2 to n = 1

    B) from n = 3 to n = 1

    C) from n = 4 to n = 2

    D) from n = 3 to n = 2

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  • question_answer55) In the lowest energy level of hydrogen atom, the electron has the angular momentum

    A) \[\text{ }\!\!\pi\!\!\text{ /h}\]

    B) \[\text{h/ }\!\!\pi\!\!\text{ }\]

    C) \[\text{h/2 }\!\!\pi\!\!\text{ }\]

    D) \[\text{2 }\!\!\pi\!\!\text{ /h}\]

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  • question_answer56) In a radioactive decay, neither the atomic number nor the mass number changes. Which of the following would be emitted in the decay process?

    A) Proton

    B) Neutron

    C) Electron

    D) Photon

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  • question_answer57) The half-life of a radio isotope is 5 yr. What fraction of this material would decay in 15 yr?

    A) 1

    B) 3/4

    C) 7/8

    D) 1/8

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  • question_answer58) The disintegration constant of a radioactive element is\[\lambda .\]Its half-life and means life are respectively

    A) \[1\text{/ }\!\!\lambda\!\!\text{ }\] and In \[\text{2/ }\!\!\lambda\!\!\text{ }\]

    B) In \[\text{2/ }\!\!\lambda\!\!\text{ }\] and \[\text{1/ }\!\!\lambda\!\!\text{ }\]

    C) \[\text{ }\!\!\lambda\!\!\text{ }\] (In 2)and \[\text{1/ }\!\!\lambda\!\!\text{ }\]

    D) \[\text{ }\!\!\lambda\!\!\text{ /}\](In 2) and \[\text{1/ }\!\!\lambda\!\!\text{ }\]

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  • question_answer59) Magnetic lines of force

    A) always intersect

    B) are always closed

    C) tend to crowd far away from the poles of a magnet

    D) do not pass through vacuum

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  • question_answer60) Rate of change of torque t with deflection \[\text{ }\!\!\theta\!\!\text{ }\] is maximum for a magnet suspended freely in a uniform magnetic field of induction B, when

    A) \[\text{ }\!\!\theta\!\!\text{ }\,\text{=}\,{{\text{0}}^{\text{o}}}\]

    B) \[\text{ }\!\!\theta\!\!\text{ }\,\text{=}\,{{45}^{0}}\]

    C) \[\text{ }\!\!\theta\!\!\text{ }\,\text{=}\,{{60}^{0}}\]

    D) \[\text{ }\!\!\theta\!\!\text{ }\,\text{=}\,{{90}^{0}}\]

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  • question_answer61) The angle of dip at a place on the earth gives

    A) the horizontal component of the earth's magnetic field

    B) the location of the geographic meridian

    C) the vertical component of the earth's field

    D) the direction of the earth's magnetic field

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  • question_answer62) The tangent galvanometer, when connected in series with a standard resistance can be used as

    A) an ammeter

    B) a voltmeter

    C) a wattmeter

    D) Both an ammeter and a voltmeter

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  • question_answer63) In the vibration magnetometer, the magnet kept in the stirrup when disturbed vibrates with a period, given by

    A) \[2\pi \sqrt{I/MB}\]

    B) \[2\pi \sqrt{MB/I}\]

    C) \[2\pi \sqrt{MBI}\]

    D) \[2\pi \sqrt{I/g}\]

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  • question_answer64) When the symbols have their usual meaning. An electric dipole is put in north-south direction in a sphere filled with water. Which statement is correct?

    A) Electric flux is coming towards sphere

    B) Electric flux is coming out of sphere

    C) Electric flux entering into sphere and leaving the sphere are same

    D) Water does not permit electric flux to enter into sphere

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  • question_answer65) Deuteron and \[\alpha \]-particle are put 1 A apart in air, magnitude of intensity of electric field due to deuteron at \[\alpha \]-particle is

    A) \[2.88\times {{10}^{11}}\text{N/C}\]

    B) \[1.44\times {{10}^{11}}\text{N/C}\]

    C) \[5.76\times {{10}^{11}}\text{N/C}\]

    D) zero

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  • question_answer66)   The permittivity and permeability of vacuum are \[{{\varepsilon }_{0}}\] and \[{{\mu }_{0}}\] respectively. The corresponding quantities for a medium are \[\varepsilon \] and\[\mu .\] Refractive index of a medium is

    A) \[\sqrt{\frac{\mu \varepsilon }{\mu {{  }_{0}}{{\varepsilon }_{0}}}}\]                   

    B) \[\frac{\mu {{  }_{0}}{{\varepsilon }_{0}}}{\sqrt{\mu \varepsilon }}\]

    C) \[\frac{\sqrt{\mu {{  }_{0}}{{\varepsilon }_{0}}}}{\mu   \varepsilon }\]                              

    D) \[\sqrt{\frac{\mu {{  }_{0}}{{\varepsilon }_{0}}}{\mu   \varepsilon }}\]

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  • question_answer67) A force F acts between sodium and chlorine ions of salt (sodium chloride) when put 1 cm apart in the air. The permittivity of air and dielectric constant of water are \[{{\varepsilon }_{0}}\] and K respectively. When a piece of salt is put in water electrical force acting between sodium and chlorine ion 1 cm apart is

    A) \[F\]

    B) \[FK\text{/}{{\text{ }\!\!\varepsilon\!\!\text{ }}_{\text{0}}}\]

    C) \[\text{F/K}{{\text{ }\!\!\varepsilon\!\!\text{ }}_{\text{0}}}\]

    D) \[\text{F/K}\]

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  • question_answer68) The radii of two spheres forming a spherical condenser are 0.5 and 0.6 m. If a medium having dielectric constant 6 is completely filled in between, the capacity of the condenser will be

    A) \[3.3\times {{10}^{-10}}\text{F}\]

    B) \[2\times {{10}^{-9}}\text{F}\]

    C) \[2\text{F}\]

    D) \[\text{18F}\]

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  • question_answer69) A parallel plate capacitor is filled up by a substance of\[{{t}_{1}}\] thickness of dielectric constant \[{{K}_{1}}\] and other substance of \[{{t}_{2}}\] thickness of dielectric constant \[{{K}_{2.}}\] The capacity of this capacitor will be

    A) \[{{\varepsilon }_{0}}A/\left( \frac{{{t}_{1}}}{{{K}_{1}}}+\frac{{{t}_{2}}}{{{K}_{2}}} \right)\]

    B) \[{{\varepsilon }_{0}}A/\left( \frac{{{K}_{1}}}{{{K}_{2}}}+\frac{{{K}_{2}}}{{{t}_{2}}} \right)\]

    C) \[{{\varepsilon }_{0}}A/\left( \frac{{{t}_{1}}}{{{K}_{2}}}+\frac{{{t}_{2}}}{{{K}_{1}}} \right)\]

    D) \[{{\varepsilon }_{0}}A/\left( \frac{{{K}_{2}}}{{{t}_{1}}}+\frac{{{K}_{1}}}{{{t}_{2}}} \right)\]

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  • question_answer70) n identical condensers are joined in parallel and are charged to potential V. Now, they are separated and joined in series. Then, the total energy and potential difference of the combination will be

    A) energy remain the same and potential difference is also same

    B) energy remain the same and potential difference is \[nV\]

    C) energy increases n times and potential difference remains is \[nV\]

    D) energy increases n times and potential difference remains same

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  • question_answer71) The electromotive force of primary cell is 2 V. When it is short circuited it gives a current of 4 A. Its internal resistance in ohm is

    A) 0.5

    B) 5.0

    C) 2.0

    D) 8.0

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  • question_answer72) A potential differences of V is applied at the ends of a copper wire of length \[l\]and diameter d. On doubling only d, drift velocity

    A) becomes two times

    B) becomes half

    C) does not change

    D) becomes one-fourth

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  • question_answer73) Three equal resistances each of value R. are joined as shown in the figure. The equivalent resistance between M and N is

    A) R

    B) 2R

    C) R/2

    D) R/3

    View Answer play_arrow
  • question_answer74) In the measurement of a resistance by Wheatstone bridge the known and the unknown resistance are interchanged to neutralize

    A) end error

    B) index error

    C) error due to thermoelectric effect

    D) random error

    View Answer play_arrow
  • question_answer75) A thermoelectric couple is made from copper and iron. At hot junction, current

    A) flows from copper towards iron

    B) flows from iron towards copper

    C) flow decreases

    D) flow increases

    View Answer play_arrow
  • question_answer76) Which of the following is not a correct statement?

    A) Resistivity of electrolytes decreases on increasing temperature

    B) Resistance of mercury falls on decreasing its temperature

    C) When joined in series a 40 W bulb glows more than a 60W bulb

    D) Resistance of 40 W bulb is less than the resistance of 60 W bulb

    View Answer play_arrow
  • question_answer77) The relation between Farady constant F. electron charge e and Avogadro Number N is

    A) \[F=\text{N/e}\]

    B) \[F=\text{Ne}\]

    C) \[N=F{{\text{e}}^{2}}\]

    D) \[F={{N}^{2}}\text{e}\]

    View Answer play_arrow
  • question_answer78) The voltage V and current \[I\] graph for s conductor at two different temperatures \[{{T}_{1}}\] and \[{{T}_{2}}\] are shown in the figure. The relation between \[{{T}_{1}}\] and \[{{T}_{2}}\] is

    A) \[{{T}_{1}}>{{T}_{2}}\]

    B) \[{{T}_{1}}\approx {{T}_{2}}\]

    C) \[{{T}_{1}}={{T}_{2}}\]

    D) \[{{T}_{1}}<{{T}_{2}}\]

    View Answer play_arrow
  • question_answer79) Two bulbs of 500 W and 200 W are manufactured to operate on 220 V line. The ratio of heat produced in 500 W and 200 W, in two cases, when firstly they are joined in parallel and secondly in series, will be

    A) 5/2,2/5

    B) 5/2,5/2

    C) 2/5, 5/2

    D) 2/5, 2/5

    View Answer play_arrow
  • question_answer80) In the circuit as shown in the figure, the heat produced by \[6\,\,\Omega \] resistance due to current flowing in it is 60cal/s. The heat generated across\[3\,\,\Omega \] resistance per second will be

    A) 30cal

    B) 60cal

    C) 100 cal

    D) 120 cal

    View Answer play_arrow
  • question_answer81) The value of Faraday constant is

    A) \[9.65\times {{10}^{4}}C\]

    B) \[9.65\times {{10}^{4}}\text{J}\]

    C) \[6.03\times {{10}^{27}}\text{J}\]

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

    View Answer play_arrow
  • question_answer82) A proton and a deuteron both having the same kinetic energy, enter perpendicularly into a uniform magnetic field B. For motion of proton and deuteron on circular path of radius \[{{r}_{P}}\] and \[{{r}_{d}}\] respectively, the correct statement is

    A) \[{{r}_{d}}={{r}_{P}}\sqrt{2}\]

    B) \[{{r}_{d}}\frac{{{r}_{P}}}{\sqrt{2}}\]

    C) \[{{r}_{d}}={{r}_{P}}\]

    D) \[{{r}_{d}}=2{{r}_{P}}\]

    View Answer play_arrow
  • question_answer83) A short bar magnet placed with its axis at \[30{}^\circ \] with a uniform external magnetic field of 0.16 T experiences a torque of magnitude 0.032 J. The magnetic moment of the bar magnet will be

    A) 0.23 J/T

    B) 0.40 J/T

    C) 0.80 J/T

    D) zero

    View Answer play_arrow
  • question_answer84) Four wires each of length 2.0 n are bent into four loops P, Q, R and S and then suspended into uniform magnetic field. Same current is passed in each loop. Which statement is correct?

    A) Couple on loop P will be the highest

    B) Couple on loop Q will be the highest

    C) Couple on loop R will be the highest

    D) Couple on loop S will be the highest

    View Answer play_arrow
  • question_answer85) Force acting between two point charges (+q and + q) distance r apart in the air is F. One charge is rotated about the other charge on a circle of radius r. The work done will be

    A) \[F\times r\]

    B) \[F\times 2\pi r\]

    C) \[F\times 2r\]

    D) zero

    View Answer play_arrow
  • question_answer86) A current \[I\] is flowing in a rectangular loop. It is put close to a wire (long and straight) such that wire is parallel to one of the arms of loop and lies in the plane of loop. If as shown in the figure, a steady current \[I\] flows in the wire, the loop

    A) will rotate about an axis parallel to wire

    B) will move away from the wire

    C) will move towards the wire

    D) will remain steady

    View Answer play_arrow
  • question_answer87) A current of 1 A is passed through a straight wire of length 2 m. The magnetic field at a point in air at a distance of 3 m from either end of wire and lying on the axis of wire will be

    A) \[\frac{{{\mu }_{0}}}{2\pi }\]

    B) \[\frac{{{\mu }_{0}}}{4\pi }\]

    C) \[\frac{{{\mu }_{0}}}{8\pi }\]

    D) zero

    View Answer play_arrow
  • question_answer88) 5 cm long solenoid having \[10\,\Omega \] resistance and 5 mH inductance is joined to a 10 V battery. At steady state the current through the solenoid (in ampere) will be

    A) 5

    B) 1

    C) 2

    D) zero

    View Answer play_arrow
  • question_answer89) A conducting wire is moving towards right in a magnetic field B. The direction of induced current in the wire is shown in the figure. The direction of magnetic field will be

    A) in the plane of paper pointing towards right

    B) in the plane of paper pointing towards left

    C) perpendicular to the plane of paper and downwards

    D) perpendicular to the plane of paper and upwards

    View Answer play_arrow
  • question_answer90) The north pole of a bar magnet is moved swiftly downward towards a closed coil and then second time it is raised upwards slowly. The magnitude and direction of the induced currents in the two cases will be

    A)

    First case Second case
    Low value clockwise Higher value anticlockwise

    B)

    First case Second case
    Low value clockwise Equal value anticlockwise

    C)

    First case Second case
    Higher value clockwise low value anticlockwise

    D)

    First case Second case
    Higher value anticlockwise Low value clockwise

    View Answer play_arrow
  • question_answer91) "The direction of the inducedcurrentina circuit is always such that it opposes the cause due to which it is produced." This law is named as

    A) Ohm's Law

    B) Lenz's Law

    C) Kirchhoffs Law

    D) Faraday's Law

    View Answer play_arrow
  • question_answer92) At a place the value of horizontal component of the earth's magnetic field H is \[3\times {{10}^{-5}}Wb/{{m}^{2}}.\] A metallic rod AB of length 2m placed in east-west direction, having the end A towards east, falls vertically downward with a constant velocity of 50 m/s. Which end of the rod becomes positively charged and what is the value of induced potential difference between the two ends?

    A) \[EndA,3\times {{10}^{-3}}mV\]

    B) End A, 3 mV

    C) \[End\text{ }B,3\times {{10}^{-3}}mV\]

    D) End B, 3 mV

    View Answer play_arrow
  • question_answer93) A circular coil of radius 5 cm has 500 turns of a wire. The approximate value of the coefficient of self-induction of the coil will be

    A) 25 mH

    B) \[25\times {{10}^{-3}}mH\]

    C) \[50\times {{10}^{-3}}mH\]

    D) \[50\times {{10}^{-3}}mH\]

    View Answer play_arrow
  • question_answer94) An emf of 100 mV is induced in a coil when the current in another nearby coil becomes 10 A from zero in 0.1 s. The coefficient of mutual induction between the two coils will be

    A) 1mH

    B) 10 mH

    C) 100 mH

    D) 1000 mH

    View Answer play_arrow
  • question_answer95) A light source approaches the observer with velocity 0.8 c. The Doppler shift for the light of wavelength \[5500\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\] is

    A) \[5500\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    B) \[1833\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    C) \[4400\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    D) \[7333\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    View Answer play_arrow
  • question_answer96) Two plates are 2 cm apart, a potential difference of 10 V is applied between them, the electric field between the plates is

    A) 20N/C

    B) 500 N/C

    C) 5 N/C

    D) 250 N/C

    View Answer play_arrow
  • question_answer97) A 120 V AC source is connected across a pure inductor of inductance 0.70 H. If the frequency of the source is 60 Hz, the current passing through the inductor is

    A) 4.55 A

    B) 0.355 A

    C) 0.455 A

    D) 3.55 A

    View Answer play_arrow
  • question_answer98) An AC generator produced an output voltage e = 170 sin 377 t volt, where t is in second. The frequency of AC voltage is

    A) 50 Hz

    B) 110 Hz

    C) 60 Hz

    D) 230 Hz

    View Answer play_arrow
  • question_answer99) In L-R circuit, for the case of increasing current, the magnitude of current can be calculated by using the formula

    A) \[I={{I}_{0}}{{e}^{-Rt/L}}\]

    B) \[I={{I}_{0}}(1-{{e}^{-Rt/L}}\]

    C) \[I={{I}_{0}}(1-{{e}^{Rt/L}})\]

    D) \[I={{I}_{0}}{{e}^{Rt/L}}\]

    View Answer play_arrow
  • question_answer100) The efficiency of transformer is very high because

    A) there is no moving part in a transformer

    B) it produces very high voltage

    C) it produces very low voltage

    D) None of the above

    View Answer play_arrow
  • question_answer101) Which is correct statement about proton?

    A) Proton is nucleus of deuterium

    B) Proton is alpha particle

    C) proton is ionized hydrogen molecule

    D) Proton is ionized hydrogen

    View Answer play_arrow
  • question_answer102) In a given atom no two electrons can have the same values of all the quantum numbers. This is called

    A) Hund's rule

    B) Aufbau principle

    C) Uncertainty principle

    D) Pauli's exclusion principle

    View Answer play_arrow
  • question_answer103) Magnetic quantum number specifies

    A) size of orbitals

    B) shape of orbitals

    C) orientation of orbitals

    D) nuclear stability

    View Answer play_arrow
  • question_answer104) 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_answer105) If wavelength of photon is \[2.2\times {{10}^{-11}}m,\] \[h=6.6\times {{10}^{-34}}Js,\] then momentum of photon is

    A) \[3\times {{10}^{-23}}kg\,m{{s}^{-1}}\]

    B) \[3.33\times {{10}^{22}}kg\,m{{s}^{-1}}\]

    C) \[1.452\times {{10}^{-44}}\,kg\,m{{s}^{-1}}\]

    D) \[6.89\times {{10}^{43}}kg\,m{{s}^{-1}}\]

    View Answer play_arrow
  • question_answer106) The bond order of \[NO\]molecule is

    A) \[1.5\]

    B) \[2.0\]

    C) \[2.5\]

    D) \[3.0\]

    View Answer play_arrow
  • question_answer107) The bond angle in water \[({{H}_{2}}O)\] molecule is

    A) \[{{109}^{o}}28'\]

    B) \[{{180}^{o}}\]

    C) \[{{90}^{o}}\]

    D) \[{{105}^{o}}\]

    View Answer play_arrow
  • question_answer108) The triple bond between N atoms of nitrogen molecule \[(N\equiv N)\] consists of

    A) three \[\sigma \]-bond

    B) two \[\sigma \]-bonds and one \[\pi \]-bond

    C) one \[\sigma \]-bond and two \[\pi \]-bonds

    D) three \[\pi \]-bonds

    View Answer play_arrow
  • question_answer109) According to VSEPR theory the most probable shape of the molecule having 4 electron pairs in the outer shell of the central atom is

    A) linear

    B) tetrahedral

    C) hexahedral

    D) octahedral

    View Answer play_arrow
  • question_answer110) The number of \[\sigma \] bonds in o-xylene is

    A) \[6\]

    B) \[9\]

    C) \[12\]

    D) \[18\]

    View Answer play_arrow
  • question_answer111) \[50\text{ }mL\]\[10\text{ }N\] \[{{H}_{2}}S{{O}_{4}},\]\[25\text{ }mL\]\[12N\] \[HCl\]and \[40\text{ }mL\]\[5N\]\[HN{{O}_{3}}\] were mixed together and the volume of the mixture was made \[1000\text{ }mL\]by adding water. The normality of the resultant solution will be

    A) \[1\text{ }N\]

    B) \[\text{2 }N\]

    C) \[\text{3 }N\]

    D) \[\text{4 }N\]

    View Answer play_arrow
  • question_answer112) Which of the following will have the highest boiling point at 1 atm pressure?

    A) \[0.1\,M\,\,NaCl\]

    B) \[0.1\text{ }M\text{ }sucrose\]

    C) \[0.1\text{ }M\text{ }BaC{{l}_{2}}\]

    D) \[0.1\text{ }M\text{ }glucose\]

    View Answer play_arrow
  • question_answer113) What will be the molality of a solution having \[18\text{ }g\]of glucose (mol. wt.\[=180\]) dissolved in \[500g\]of water?

    A) \[1m\]

    B) \[0.5m\]

    C) \[0.2m\]

    D) \[2m\]

    View Answer play_arrow
  • question_answer114) An aqueous solution freezes at \[-{{0.186}^{o}}C\] \[({{k}_{f}}={{1.86}^{o}};\,{{k}_{b}}={{0.512}^{o}})\]What is the elevation in boiling point?

    A) \[0.186\]

    B) \[0.512\]

    C) \[\frac{0.512}{1.86}\]

    D) \[0.0512\]

    View Answer play_arrow
  • question_answer115) Which one of the following is a colligative property?

    A) Surface tension

    B) Osmotic pressure

    C) Viscosity

    D) Refractive index

    View Answer play_arrow
  • question_answer116) How many kinds of space lattices are possible in a crystal?

    A) \[23\]

    B) \[7\]

    C) \[230\]

    D) \[14\]

    View Answer play_arrow
  • question_answer117) Diamond is an example of

    A) covalent solid

    B) electrovalent solid

    C) solid with hydrogen bonding

    D) glass

    View Answer play_arrow
  • question_answer118) What is Y in the following nuclear reaction? \[_{7}{{H}^{14}}{{+}_{1}}{{H}^{1}}{{\xrightarrow{{}}}_{8}}{{O}^{15}}+'X'\]

    A) \[_{0}{{n}^{1}}\]

    B) \[_{-1}{{e}^{0}}\]

    C) \[_{+1}{{e}^{0}}\]

    D) Energy

    View Answer play_arrow
  • question_answer119) The end product of \[(4n+2)\] radioactive disintegration series is

    A) \[_{82}^{208}Pb\]

    B) \[_{82}^{206}Pb\]

    C) \[_{82}^{207}Pb\]

    D) \[_{83}^{210}Bi\]

    View Answer play_arrow
  • question_answer120) The radioactive isotope which is used to estimate the age of ancient geological formations is

    A) \[{{O}^{8}}\]

    B) \[P{{b}^{212}}\]

    C) \[F{{e}^{59}}\]

    D) \[_{6}{{C}^{14}}\]

    View Answer play_arrow
  • question_answer121) The half-life period of a radioactive element is \[140\]days. In \[560\,days\]a sample of this element would be reduced to ......of its initial mass.

    A) \[1/2\]

    B) \[1/4\]

    C) \[1/8\]

    D) \[1/16\]

    View Answer play_arrow
  • question_answer122) For the homogeneous gas reaction, \[4N{{H}_{3}}+5{{O}_{2}}\rightleftharpoons 4NO+6{{H}_{2}}O\] the equilibrium constant \[{{K}_{c}},\] has the dimension of

    A) \[conc{{.}^{+10}}\]

    B) \[conc{{.}^{+1}}\]

    C) \[conc{{.}^{-1}}\]

    D) it is dimensionless

    View Answer play_arrow
  • question_answer123) Formation of the \[S{{O}_{3}}\] takes place according to the reaction \[2S{{O}_{2}}+{{O}_{2}}\rightleftharpoons 2S{{O}_{3}};\] \[\Delta H=-45.2kcal\] Which of the following factors favours the formation of \[S{{O}_{3}}\]?

    A) Increase in temperature

    B) Increase in pressure

    C) Removal of oxygen

    D) Increase in volume

    View Answer play_arrow
  • question_answer124) In the equilibrium reaction, \[2HI(g)\rightleftharpoons {{H}_{2}}+{{I}_{2}}\] which of the following expressions is true?

    A) \[{{K}_{p}}={{K}_{c}}\]

    B) \[{{K}_{c}}=2{{K}_{p}}\]

    C) \[{{K}_{p}}>{{K}_{c}}\]

    D) \[{{K}_{c}}={{K}_{p}}{{(RT)}^{2}}\]

    View Answer play_arrow
  • question_answer125) \[{{K}_{p}}/{{K}_{c}}\]for the reaction,\[CO(g)+\frac{1}{2}{{O}_{2}}(g)\rightleftharpoons C{{O}_{2}}(g)\] is

    A) \[1\]

    B) \[RT\]

    C) \[\frac{1}{\sqrt{RT}}\]

    D) \[{{(RT)}^{1/2}}\]

    View Answer play_arrow
  • question_answer126) A monoprotic acid in a \[0.1\text{ }M\]solution ionises to \[0.001%\]. Its ionisation constant is

    A) \[1.0\times {{10}^{-3}}\]

    B) \[1.0\times {{10}^{-6}}\]

    C) \[1.0\times {{10}^{-8}}\]

    D) \[1.0\times {{10}^{-11}}\]

    View Answer play_arrow
  • question_answer127) The pH of a \[{{10}^{-8}}\] molar solution of \[HCl\]in water is

    A) \[8\]

    B) \[-8\]

    C) between \[7\] and \[8\]

    D) between \[6\] and \[7\]

    View Answer play_arrow
  • question_answer128) Which of the following salts when dissolved in water hydrolyse?

    A) \[NaCl\]

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

    C) \[KCl\]

    D) \[N{{a}_{2}}S{{O}_{4}}\]

    View Answer play_arrow
  • question_answer129) What is the correct representation for the solubility product of \[Sn{{S}_{2}}\]?

    A) \[[S{{n}^{2+}}]\,{{[{{S}^{2-}}]}^{2}}\]

    B) \[[S{{n}^{4+}}]\,{{[{{S}^{2-}}]}^{2}}\]

    C) \[[S{{n}^{2+}}]\,[2{{S}^{2-}}]\]

    D) \[[S{{n}^{2+}}]\,{{[2{{S}^{2-}}]}^{2}}\]

    View Answer play_arrow
  • question_answer130) If \[100\text{ }mL\] of \[1N\] hydrochloric acid were mixed with \[100\text{ }mL\] of \[1M\]sodium hydroxide, the solution will be

    A) acidic

    B) basic

    C) neutral

    D) slightly acidic

    View Answer play_arrow
  • question_answer131) Which of the following expressions represents the first law of thermodynamics?

    A) \[q=\Delta E-W\]

    B) \[\Delta E=q-W\]

    C) \[\Delta E=q+W\]

    D) \[\Delta E=q+pdV\]

    View Answer play_arrow
  • question_answer132) In a spontaneous process the entropy of the system and its surroundings

    A) equals zero

    B) decreases

    C) increases

    D) remains constant

    View Answer play_arrow
  • question_answer133) For the first order reaction with the constant k, which expression gives the half-life period? (Initial concentration = a)

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

    B) \[\frac{1}{k\times a}\]

    C) \[\frac{0.693}{k\times a}\]

    D) \[\frac{3}{2k{{a}^{2}}}\]

    View Answer play_arrow
  • question_answer134) The rate constant is given by the equation \[k=PZ{{e}^{-E/RT}},\] which factor should register a decrease for the reaction to proceed more rapidly?

    A) \[T\]

    B) \[Z\]

    C) \[E\]

    D) \[P\]

    View Answer play_arrow
  • question_answer135) For a reaction of the type \[A+B\to \]products, it is observed that doubling the concentration of A causes the reaction rate to be four times as great, but doubling the amount of B does not affect the rate. The rate equation is

    A) \[Rate=k[A]\,[B]\]

    B) \[Rate=\frac{k}{4}{{[A]}^{2}}\]

    C) \[Rate=k{{[A]}^{2}}[B]\]

    D) \[Rate=k{{[A]}^{2}}{{[B]}^{2}}\]

    View Answer play_arrow
  • question_answer136) Oxidation number of carbon in \[C{{H}_{3}}-Cl\]is

    A) \[-3\]

    B) \[-2\]

    C) \[-1\]

    D) \[0\]

    View Answer play_arrow
  • question_answer137) Which one of the following metals will not form an amalgam?

    A) Gold

    B) Silver

    C) Zinc

    D) Iron

    View Answer play_arrow
  • question_answer138) Incorrect statement regarding rusting is

    A) metallic iron is oxidised to \[F{{e}^{3+}}\]ions

    B) metallic iron is reduced to \[F{{e}^{2-}}\] ions

    C) oxygen gas is reduced to oxide ion

    D) yellowish-brown product is formed

    View Answer play_arrow
  • question_answer139) Which will be the proper alternative in place of A in the following equation? \[2F{{e}^{3+}}(aq)+S{{n}^{2+}}(aq)\xrightarrow{{}}2F{{e}^{2+}}(aq)+A\]

    A) \[S{{n}^{4+}}\]

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

    C) \[S{{n}^{2+}}\]

    D) \[S{{n}^{0}}\]

    View Answer play_arrow
  • question_answer140) \[{{E}^{o}}=\frac{RT}{nF}\] In\[{{K}_{eq}},\] this equation is called

    A) Gibb's equation

    B) Gibbs's-Helmholtz equation

    C) Nernst equation

    D) van der Waals' equation

    View Answer play_arrow
  • question_answer141) Which of the following acts both as oxidising and reducing agent?

    A) \[HN{{O}_{3}}\]

    B) \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]

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

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

    View Answer play_arrow
  • question_answer142) The oxidation number of oxygen in ozone is

    A) \[-3\]

    B) \[-2\]

    C) 0 (zero)

    D) \[+3\]

    View Answer play_arrow
  • question_answer143) If an iron wire is placed in a solution of copper sulphate

    A) copper will precipitate out

    B) iron will dissolve and precipitate out thereafter

    C) iron and copper both will go into solution

    D) no reaction will take place

    View Answer play_arrow
  • question_answer144) To which of the following, the mass of an element deposited at an electrode is directly proportional?

    A) Atomic weight

    B) Equivalent weight

    C) Molecular weight

    D) Atomic number

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  • question_answer145) From the solution of which of the following one faraday of electricity will liberate one gram atom of metal?

    A) \[NaCl\]

    B) \[BaC{{l}_{2}}\]

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

    D) \[AlC{{l}_{3}}\]

    View Answer play_arrow
  • question_answer146) In which of the following, oxygen has an oxidation state of \[+2\]?

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

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

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

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

    View Answer play_arrow
  • question_answer147) Point out the false statement.

    A) Brownian movement and Tyndall effect is shown by colloidal systems

    B) Gold number is a measure of the protective power of a lyophilic colloid

    C) The colloidal solution of a liquid in liquid is called gel

    D) Hardy-SchuIze rule is related with coagulation

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  • question_answer148) Which one of the following will have the highest coagulating power for a ferric hydroxide sol?

    A) \[NaCl\]

    B) \[BaC{{l}_{2}}\]

    C) \[{{K}_{2}}Cr{{O}_{4}}\]

    D) \[{{K}_{4}}[Fe{{(CN)}_{6}}]\]

    View Answer play_arrow
  • question_answer149) Which of the following statement is false?

    A) A catalyst is specific in its action

    B) A very small amount of the catalyst alters the rate of a reaction

    C) The number of free valencies on the surface of the catalyst increases on subdivision

    D) \[Ni\] is used as catalyst in the manufacture of ammonia

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  • question_answer150) The natural materials from which an element can be extracted economically are called

    A) ores

    B) minerals

    C) Gangue

    D) None of these

    View Answer play_arrow
  • question_answer151) When a metal is to be extracted from its ore, if the gangue associated with the ore is silica, then

    A) An acidic flux is needed

    B) a basic flux is needed

    C) Both acidic and basic flux are needed

    D) Neither of them is needed

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  • question_answer152) An example of an oxide ore is

    A) Bauxite

    B) malachite

    C) Zinc blende

    D) feldspar

    View Answer play_arrow
  • question_answer153) In the Hoopes process, for refining of aluminium, the fused materials form three different layers and they remain separated during electrolysis also, this is because

    A) the upper layer is kept attracted by the cathode and the lower layer is kept attracted by the anode

    B) There is special arrangement in the cell to keep the layers separate

    C) the three layers have different densities

    D) The three layers are maintained at different temperatures

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  • question_answer154) In galvanisation, iron surface is coated with

    A) tin

    B) chromium

    C) zinc

    D) nickel

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  • question_answer155) In order to refine "Blister copper" it is melted in a furnace and is stirred with green logs of wood. The purpose is

    A) To expel the dissolved gases in blister copper

    B) To bring the impurities to surface and oxidize them

    C) To increase the carbon content of copper

    D) To reduce the metallic oxide impurities with hydrocarbon gases liberated from the wood

    View Answer play_arrow
  • question_answer156) On going from right to left in a period in the periodic table, the electronegativity of the elements

    A) Increases

    B) Decreases

    C) Remains unchanged

    D) Decreases first then increases

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  • question_answer157) In the periodic table, the element with atomic number 16 will be placed in the group

    A) third

    B) fourth

    C) fifth

    D) sixth

    View Answer play_arrow
  • question_answer158) Metals belonging to the same group in the periodic table are

    A) Magnesium and sodium

    B) Magnesium and copper

    C) Magnesium and barium

    D) Magnesium and potassium

    View Answer play_arrow
  • question_answer159) The electronic configuration in the outermost shell of halogens is

    A) \[{{s}^{2}}{{p}^{4}}\]

    B) \[{{s}^{2}}{{p}^{5}}\]

    C) \[{{s}^{2}}{{p}^{3}}\]

    D) \[{{s}^{2}}{{p}^{6}}\]

    View Answer play_arrow
  • question_answer160) The ionic radii \[{{N}^{3-}},\] \[{{O}^{2-}},\] \[{{F}^{-}}\]and \[N{{a}^{+}}\]follow the order

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

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

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

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

    View Answer play_arrow
  • question_answer161) Which of the following electronic configurations is of a transition element?

    A) \[~1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}4{{s}^{2}}\]

    B) \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{10}}4{{s}^{2}}4{{p}^{1}}\]

    C) \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{p}^{6}}3{{d}^{10}}4{{s}^{2}}4{{p}^{6}}\]

    D) \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{2}}4{{s}^{2}}\]

    View Answer play_arrow
  • question_answer162) Nessler's reagent is

    A) \[K{{H}_{g}}{{I}_{4}}\]

    B) \[{{K}_{2}}Hg{{I}_{4}}+N{{H}_{4}}OH\]

    C) \[{{K}_{2}}Hg{{I}_{4}}+KOH\]

    D) \[KHg{{I}_{4}}+N{{H}_{4}}OH\]

    View Answer play_arrow
  • question_answer163) 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_answer164) By passing \[{{H}_{2}}S\] gas in acidified\[KMn{{O}_{4}}\]. solution, we get

    A) \[{{K}_{2}}S\]

    B) \[S\]

    C) \[{{K}_{2}}S{{O}_{3}}\]

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

    View Answer play_arrow
  • question_answer165) If molecular weight of \[KMn{{O}_{4}}\] is ?M? then its equivalent weight in acidic medium would be

    A) \[M\]

    B) \[M/2\]

    C) \[M/5\]

    D) \[M/4\]

    View Answer play_arrow
  • question_answer166) \[Xe{{F}_{6}}\] on hydrolysis gives

    A) \[Xe{{O}_{3}}\]

    B) \[XeO\]

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

    D) \[Xe\]

    View Answer play_arrow
  • question_answer167) Which one of the following should be most stable?

    A) \[H_{2}^{+}\]

    B) \[{{H}^{+}}\]

    C) \[{{H}^{-}}\]

    D) \[H\]

    View Answer play_arrow
  • question_answer168) Molecular formula of Glauber's salt is

    A) \[MgS{{O}_{4}},7{{H}_{2}}O\]

    B) \[CuS{{O}_{4}},5{{H}_{2}}O\]

    C) \[FeS{{O}_{4}}.7{{H}_{2}}O\]

    D) \[N{{a}_{2}}S{{O}_{4}}.10{{H}_{2}}O\]

    View Answer play_arrow
  • question_answer169) The metal that is extracted from sea water is

    A) \[Mg\]

    B) \[Ca\]

    C) \[Fe\]

    D) \[Ni\]

    View Answer play_arrow
  • question_answer170) Which of the following oxides reacts with \[HCl\] and\[NaOH\]?

    A) \[CaO\]

    B) \[ZnO\]

    C) \[{{N}_{2}}{{O}_{5}}\]

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

    View Answer play_arrow
  • question_answer171) The most basic element is

    A) fluorine

    B) iodine

    C) chlorine

    D) bromine

    View Answer play_arrow
  • question_answer172) An example of a double salt is

    A) Bleaching powder

    B) Hypo

    C) \[{{K}_{4}}{{[Fe(CN)]}_{6}}\]

    D) Potash alum

    View Answer play_arrow
  • question_answer173) Precipitate of \[AgCl\] dissolves in \[N{{H}_{4}}OH\] due to formation of a complex

    A) \[[Ag{{(N{{H}_{4}})}_{2}}]Cl\]

    B) \[[Ag{{(N{{H}_{4}})}_{3}}]Cl\]

    C) \[[Ag{{(N{{H}_{3}})}_{2}}]Cl\]

    D) \[[Ag{{(N{{H}_{3}})}_{2}}OH]\]

    View Answer play_arrow
  • question_answer174) The number of ions per mole of a complex \[[CoC{{l}_{2}}.{{(N{{H}_{3}})}_{4}}]Cl\] in aqueous solution will be

    A) nine

    B) four

    C) three

    D) two

    View Answer play_arrow
  • question_answer175) \[[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]N{{O}_{2}}\] and \[[Co{{(N{{H}_{3}})}_{4}}ClN{{O}_{2}}]Cl\] are isomers of which type?

    A) Geometrical

    B) Optical

    C) Linkage

    D) Ionization

    View Answer play_arrow
  • question_answer176) Which one of the following sulphides is only completely precipitated when the acidic solution is made dilute?

    A) \[HgS\]

    B) \[PbS\]

    C) \[CdS\]

    D) \[CuS\]

    View Answer play_arrow
  • question_answer177) Which of the following combines with \[F{{e}^{2+}}\] ions to form a brown complex?

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

    B) \[NO\]

    C) \[{{N}_{2}}{{O}_{3}}\]

    D) \[{{N}_{2}}{{O}_{5}}\]

    View Answer play_arrow
  • question_answer178) Which of the following substances consists of only one element?

    A) Marble

    B) Sand

    C) Diamond

    D) Glass

    View Answer play_arrow
  • question_answer179) An organic compound with \[C=40%\]and \[H=6.7%\]will have the empirical formula

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

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

    C) \[{{C}_{3}}{{H}_{6}}{{O}_{3}}\]

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

    View Answer play_arrow
  • question_answer180) The IUPAC name of the compound is \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{2}}-C{{H}_{2}}-Cl\]

    A) 1-chloro-3-methylbutane

    B) 2-methyl-4-chlorobutane

    C) 2-methyl-1-chlorobutane

    D) 1-chloropentane

    View Answer play_arrow
  • question_answer181) An organic compound will show optical isomerism if

    A) Four groups attached to C atom are different

    B) Three groups attached to C atom are different

    C) Two groups attached to C atom are different

    D) All the groups attached to C atom are same

    View Answer play_arrow
  • question_answer182) The arrangement of hydrogen atoms around carbon in the methane molecule is

    A) Triangular

    B) Square planar

    C) Tetrahedral

    D) Hexagonal

    View Answer play_arrow
  • question_answer183) The reaction between an Alkyl halide and sodium metal in dry ether is called

    A) Clemmensen reduction

    B) Kolbe's reaction

    C) Wurtz reaction

    D) Cannizaro's reaction

    View Answer play_arrow
  • question_answer184) Ethylene may be obtained by dehydration of which of the following with concentrated \[{{H}_{2}}S{{O}_{4}}\] at\[160-{{170}^{o}}C\]?

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

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

    C) \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\]

    D) \[{{(C{{H}_{3}})}_{2}}CHC{{H}_{2}}OH\]

    View Answer play_arrow
  • question_answer185) Ethylene reacts with bromine to form

    A) \[Br-C{{H}_{2}}-C{{H}_{3}}\]

    B) \[C{{H}_{3}}-C-B{{r}_{3}}\]

    C) \[Br-C{{H}_{2}}-C{{H}_{2}}-Br\]

    D) \[CHB{{r}_{3}}\]

    View Answer play_arrow
  • question_answer186) The shape of methane molecule is

    A) Tetrahedral

    B) Triangular

    C) Planar

    D) Octahedral

    View Answer play_arrow
  • question_answer187) When chloroform is left open in light and air, it forms

    A) Methylene chloride

    B) Formic acid

    C) Carbon tetrachloride

    D) Phosgene

    View Answer play_arrow
  • question_answer188) Distinction is made between ethyl alcohol and methyl alcohol by

    A) Chloroform test

    B) Victor Meyer test

    C) Rate of esterification

    D) Iodoform test

    View Answer play_arrow
  • question_answer189) Chloroform on reduction with zinc and \[HCl\] forms

    A) Formic acid

    B) Chloropicrin

    C) Methyl chloride

    D) Phosgene

    View Answer play_arrow
  • question_answer190) From which of the following tertiary butyl alcohol is obtained by the action of methyl magnesium iodide?

    A) \[HCHO\]

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

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

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

    View Answer play_arrow
  • question_answer191) For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of a saturated carboxylic acid is subjected to

    A) Hydrolysis

    B) Oxidation

    C) Hydrogenation

    D) Electrolysis

    View Answer play_arrow
  • question_answer192) If formaldehyde and \[KOH\]are heated, then we get

    A) Acetylene

    B) Methane

    C) Methyl alcohol

    D) Ethyl formate

    View Answer play_arrow
  • question_answer193) Which of the following reagent reacts differently with \[HCHO,\]\[C{{H}_{3}}CHO\] and\[C{{H}_{3}}COC{{H}_{3}}\]?

    A) \[HCN\]

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

    C) \[N{{H}_{2}}OH\]

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

    View Answer play_arrow
  • question_answer194) Identify the product C in the series\[C{{H}_{3}}CN\xrightarrow{Na/{{C}_{2}}{{H}_{5}}OH}A\xrightarrow{HN{{O}_{2}}}B\]\[\xrightarrow{\begin{smallmatrix} Tollen's \\ reagent \end{smallmatrix}}C\]

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

    B) \[C{{H}_{3}}C{{H}_{2}}NHOH\]

    C) \[C{{H}_{3}}CON{{H}_{2}}\]

    D) \[C{{H}_{3}}CHO\]

    View Answer play_arrow
  • question_answer195) Lower carboxylic acid are soluble in-water due to

    A) Low molecular weight

    B) Hydrogen bonding

    C) Dissociation into ions

    D) Easy hydrolysis

    View Answer play_arrow
  • question_answer196) Ethyl acetate reacts with \[C{{H}_{3}}MgBr\]to form

    A) Secondary alcohol

    B) Tertiary alcohol

    C) Primary alcohol and acid

    D) Acid

    View Answer play_arrow
  • question_answer197) Which is used for the formation of nylon 66?

    A) Sulphur hexafluoride

    B) Adipic acid

    C) Sulphurous acid

    D) Phthalic acid

    View Answer play_arrow
  • question_answer198) Which of the following statements is false in the context of enzyme?

    A) Temperature affects their functioning

    B) pH affects their functioning

    C) They always increase activation energy

    D) Their reactions are specific

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  • question_answer199) Oils and fats together are called

    A) enzymes

    B) soaps

    C) polymer

    D) lipids

    View Answer play_arrow
  • question_answer200) The secondary structure of proteins is due to

    A) Peptide bond

    B) Hydrogen bond

    C) van der Waals' forces

    D) Ionic bond

    View Answer play_arrow
  • question_answer201) Whose secretion forms the peari?

    A) Prismatic layer

    B) Columnar epithelial cells of mantle

    C) Ciliated epithelial cells of mantle

    D) Connective tissue of mantle

    View Answer play_arrow
  • question_answer202) Striped muscles are present in

    A) lungs

    B) gallbladder

    C) blood vessels

    D) limb muscles

    View Answer play_arrow
  • question_answer203) The stored food material found in muscles is

    A) protein

    B) glycogen

    C) lipid

    D) phosphogen

    View Answer play_arrow
  • question_answer204) Striped muscles are

    A) syncytial

    B) uninucleate

    C) binucleate

    D) anucleate

    View Answer play_arrow
  • question_answer205) The main function of tendon is

    A) to join two bones

    B) to join two muscles

    C) to join muscles and bones

    D) to join muscles and nerves

    View Answer play_arrow
  • question_answer206) Nails are formed by

    A) bones

    B) chitin

    C) cartilage

    D) keratin

    View Answer play_arrow
  • question_answer207) In our body, the blood bank is

    A) red bone marrow

    B) spleen

    C) liver

    D) heart

    View Answer play_arrow
  • question_answer208) What type of poison is ethylene dichloride?

    A) Stomach poison

    B) Contact poison

    C) Fumigant

    D) Biological control

    View Answer play_arrow
  • question_answer209) Vocal cords are situated at

    A) pharynx

    B) larynx

    C) glottis

    D) bronchial tube

    View Answer play_arrow
  • question_answer210) Cutaneous glands are

    A) gastric glands

    B) sebaceous glands

    C) thyroid gland

    D) thymus gland

    View Answer play_arrow
  • question_answer211) Desmosome is the modification of

    A) Golgi bodies

    B) endoplasmic membrane

    C) plasma membrane

    D) ER-nucleus complex

    View Answer play_arrow
  • question_answer212) Bilirubin and biliverd in are present in

    A) pancreatic juice

    B) saliva

    C) bile juice

    D) intestinal juice

    View Answer play_arrow
  • question_answer213) Enzyme 'renin' is secreted by

    A) cells of stomach

    B) cells of intestine

    C) the cortical cells of kidney

    D) the cells of juxtaglomerular apparatus of kidney

    View Answer play_arrow
  • question_answer214) Dental formula of man is

    A) \[\frac{2123}{2123}\]

    B) \[\frac{1223}{1223}\]

    C) \[\frac{2132}{2132}\]

    D) \[\frac{2213}{2213}\]

    View Answer play_arrow
  • question_answer215) Muscles of alimentary canal are chiefly

    A) striated and neurogenic

    B) un striated and neurogenic

    C) striated and myogenic

    D) un striated and myogenic

    View Answer play_arrow
  • question_answer216) What is the total vital capacity of lungs in man?

    A) 500 mL

    B) 2,000 mL

    C) 4,600 mL

    D) 5,800 mL

    View Answer play_arrow
  • question_answer217) Loop of Henie is meant for absorption of

    A) potassium

    B) glucose

    C) water

    D) \[C{{O}_{3}}\]

    View Answer play_arrow
  • question_answer218) In muscular contraction

    A) ATP breaks

    B) ATP is formed

    C) GTP breaks

    D) None of these

    View Answer play_arrow
  • question_answer219) pH of human blood is

    A) 8.4

    B) 7.4

    C) 6.4

    D) 5.4

    View Answer play_arrow
  • question_answer220) Oxygen is transported by

    A) blood plasma

    B) leucocytes

    C) RBC

    D) thrombocytes

    View Answer play_arrow
  • question_answer221) Lymph is colourless because

    A) WBCs are absent

    B) WBCs are present

    C) Haemoglobin is absent

    D) RBCs are absent

    View Answer play_arrow
  • question_answer222) Lymph (nodes) glands forms

    A) hormones

    B) lymph

    C) antigens

    D) antibodies

    View Answer play_arrow
  • question_answer223) In human beings, the function of spleen is

    A) to assist kidneys

    B) to control blood pressure

    C) to assist liver

    D) to produce blood

    View Answer play_arrow
  • question_answer224) Bowman's capsule is part of

    A) uriniferous tubule

    B) renal artery

    C) renal portal vein

    D) ureter

    View Answer play_arrow
  • question_answer225) Filtration takes place in

    A) Malpighian capsule

    B) Bowman's capsule

    C) glomerulus

    D) collecting tubule

    View Answer play_arrow
  • question_answer226) Main function of cerebellum is

    A) balancing

    B) to see

    C) to hear

    D) remembering

    View Answer play_arrow
  • question_answer227) Third ventricle is present in

    A) heart

    B) brain

    C) kidney

    D) liver

    View Answer play_arrow
  • question_answer228) The centre for sense of smell in brain is

    A) cerebellum

    B) cerebrum

    C) olfactory lobes

    D) midbrain

    View Answer play_arrow
  • question_answer229) The nerve related with diaphragm is

    A) vagus

    B) phrenic

    C) trigeminal

    D) glossopharyngeal

    View Answer play_arrow
  • question_answer230) Cowper's gland is present in

    A) cockroach

    B) rabbit

    C) earthworm

    D) frog

    View Answer play_arrow
  • question_answer231) Monoestrous animals are those which have

    A) one menses each month

    B) one evularion each month

    C) one egg

    D) one breeding season in the year

    View Answer play_arrow
  • question_answer232) 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

    View Answer play_arrow
  • question_answer233) In sexually reproducing animals, the union of male and female gamete forms a cell which is called

    A) ovarian cell

    B) oocyte

    C) zygote

    D) Graafian follicle

    View Answer play_arrow
  • question_answer234) Fertilization occurs in

    A) ovary

    B) fallopian tube

    C) uterus

    D) None of these

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  • question_answer235) Quadriceps and gastrocnemius muscles lie in

    A) hands

    B) legs

    C) shoulder

    D) wrist

    View Answer play_arrow
  • question_answer236) The emergency hormone is

    A) thyroxin

    B) adrenalin

    C) insulin

    D) progesterone

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  • question_answer237) In a sperm, the mitochondria occur

    A) in tail

    B) in acrosome

    C) in middle piece

    D) in head

    View Answer play_arrow
  • question_answer238) Life-span of human RBC is

    A) 120 days

    B) 90 days

    C) 2-3 days

    D) 20 days

    View Answer play_arrow
  • question_answer239) Only rods are present in the eyes of one of the following animal

    A) pigeon

    B) squirrel

    C) fowl

    D) owl

    View Answer play_arrow
  • question_answer240) Pharynx and middle ear are interconnected by

    A) tympanic canal

    B) eustachian canal

    C) cochlear canal

    D) vestibular canal

    View Answer play_arrow
  • question_answer241) Proprioceptors refers to the ailment of

    A) chemicals

    B) temperature

    C) taste

    D) change in the internal environment of the body

    View Answer play_arrow
  • question_answer242) From outer to inside the sequence of three bones present in the middle ear of mammals is

    A) incus, malleus and stapes

    B) malleus, incus and stapes

    C) malleus, stapes and incus

    D) stapes, malleus and incus

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  • question_answer243) How many kinds of cells are found in islets Langerhans?

    A) 1

    B) 2

    C) 3

    D) 4

    View Answer play_arrow
  • question_answer244) Diabetes insipidus is under the control of

    A) All dosterone

    B) ADH

    C) ACTH

    D) TSH

    View Answer play_arrow
  • question_answer245) FSH and LH hormones together are called

    A) emergency

    B) gonadotropic hormones

    C) neurohormones

    D) outstress hormones

    View Answer play_arrow
  • question_answer246) Parathormone deficiency in man causes

    A) hypercalcemia

    B) hypocalcemia

    C) goiter

    D) All of these

    View Answer play_arrow
  • question_answer247) Gorilla like man with large heads and protruding jaws, is produced due to

    A) over secretion of thyroxin

    B) over secretion growth hormone since maturity

    C) excess of vitamin-'C' in diet

    D) excess secretion of TSH

    View Answer play_arrow
  • question_answer248) Which one controls the secretion of estrogen

    A) HCG

    B) Progesterone

    C) LH

    D) FSH

    View Answer play_arrow
  • question_answer249) At cellular level, GH affects growth by controlling die production of

    A) rRNA

    B) t-RNA

    C) mRNA

    D) None of these

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  • question_answer250) Which of the following vitamins is essential for DNA synthesis and cell division ?

    A) Vitamin-A

    B) Vitamin-D

    C) Folic acid

    D) Vitamin-K

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  • question_answer251) Marasmum disease is caused due to

    A) protein deficiency

    B) obesity

    C) dwarfism

    D) deficiency of vitamins

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  • question_answer252) The brain develops from

    A) ectoderm

    B) mesoderm

    C) endoderm

    D) meso-endoderm

    View Answer play_arrow
  • question_answer253) The acrosome plays important role in

    A) motility of sperm

    B) penetration of ovum by sperm

    C) providing energy to sperm

    D) None of these

    View Answer play_arrow
  • question_answer254) The eggs of placental mammals are described as

    A) microlecithal

    B) telolecithal

    C) centrolecithal

    D) macrolecithal

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  • question_answer255) Oogenesis is the process for the formation of

    A) red blood cells

    B) sperms

    C) ova

    D) sperms and ova

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  • question_answer256) The third phase in the development of mammal is

    A) cleavage

    B) gastrulation

    C) gametogenesis

    D) fertilization

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  • question_answer257) During ageing, collagen present in intercellular spaces becomes

    A) Destroyed

    B) Impremeable and rigid

    C) More elastic

    D) All of the above

    View Answer play_arrow
  • question_answer258) The theory of ageing holds that ageing is due to

    A) random mutation in DNA of somatic cells

    B) increased cross-linkage of collagen and other proteins

    C) cumulative result of damage to tissues by free radicals

    D) All of the above

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  • question_answer259) If mother has blood group B, father has A group, the offspring will be of

    A) A group

    B) O group

    C) Any of the group

    D) AB group

    View Answer play_arrow
  • question_answer260) Erythroblastosis foetalis occurs when

    A) husband is \[R{{h}^{-}}\] and wife \[R{{h}^{-}}\]

    B) wife is \[R{{h}^{-}}\]and husband \[R{{h}^{-}}\]

    C) wife is \[R{{h}^{-}}\]and husband \[R{{h}^{+}}\]

    D) wife is \[R{{h}^{-}}\]and husband \[R{{h}^{+}}\]

    View Answer play_arrow
  • question_answer261) Match List \[\text{I}\] with List \[\text{II}\] and select the correct answer using the codes given below

    List \[\text{I}\] (Inheritable disease) List\[\text{II}\] (Symptoms)
    (A) Achondroplasia 1. Blood coagulation delayed due to absence of factor IX
    (B) Cystinuria 2. Darkness due to short limb bones, head is normal
    (C) Epilepsy 3. Periodic convulsions and unconsciousness
    (D) Christmas disease 4. Renal stone formation due to excessive excretion of cytine in urine
    Codes:

    A) A-1 A-2 A-3 A-4

    B) B-2 B-4 B-3 B-1

    C) C-4 C-3 C-2 C-1

    D) D-3 D-4 D-1 D-2

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  • question_answer262) The frequency of mutant gene in a population is expected to increase if that gene is

    A) dominant

    B) recessive

    C) sex linked

    D) favourably selected

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  • question_answer263) Abzymes are

    A) abnormal enzymes

    B) enzymes act on antibodies

    C) antibodies act as enzymes

    D) All of the above

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  • question_answer264) Whereas the number of chromosomes is reduced to half in first reduction division of meiosis, then what is the need for second mitotic division?

    A) For the segregation of replicated chromosomes

    B) For equal distribution of haploid chromosomes

    C) For the formation of four gametes

    D) For equal distribution of genes on chromosomes

    View Answer play_arrow
  • question_answer265) During systole

    A) auricles and ventricles contract simultaneously

    B) auricles and ventricles contract separately

    C) only auricles contract

    D) only ventricles contract

    View Answer play_arrow
  • question_answer266) Hybridoma technology was developed by

    A) Taggart; 1982

    B) Prie and Saxton; 1987

    C) Vitella et al; 1982

    D) Kohler and Milstein; 1982

    View Answer play_arrow
  • question_answer267) In F2 generation, quantitative inheritance 1:4: 6 : 4 : 1 is obtained instead of

    A) 8 : 6 : 4 : 1

    B) 7 : 4 :1: 4

    C) 9 : 3 : 3 : 1

    D) 6 : 6 : 4 : 7

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  • question_answer268) Acromion process is found in rabbit in

    A) pectoral girdle

    B) femur

    C) vertebral column

    D) pelvic girdle

    View Answer play_arrow
  • question_answer269) The most, commonly used enzyme for polymerase chain reaction is

    A) DNA polymerase\[\text{-II}\]

    B) Reverse transcriptase

    C) Klenow fragment

    D) Taq polymerase

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  • question_answer270) In humans, sex determination of the offspring is decided by the

    A) sex chromosome of mother

    B) sex chromosome of father

    C) size of ovum

    D) size of sperm

    View Answer play_arrow
  • question_answer271) If somatic cells of a human male contain single Barr body, the genetic composition of the person would be

    A) XYY

    B) XXY

    C) XO

    D) XXXY

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  • question_answer272) The main cause of paralysis is

    A) some defect in muscles

    B) complete destruction of sensory nerves

    C) complete destruction of motor nerves

    D) None of the above

    View Answer play_arrow
  • question_answer273) Sex ratio in a species indicates the numerical relation between the number of

    A) male and female producing gametes

    B) blacks and whites

    C) unisexual and bisexual

    D) None of the above

    View Answer play_arrow
  • question_answer274) Systema naturae is concerned with

    A) solar system

    B) ecosystem

    C) classification of plants and animals

    D) natural selection

    View Answer play_arrow
  • question_answer275) Phylogeny tells about

    A) life history of animals

    B) group of phyla

    C) evolutionary history of a species from its ancestors

    D) castes of flies

    View Answer play_arrow
  • question_answer276) Which of the following classes has largest number of animals?

    A) Mammalia

    B) Pisces

    C) Insecta

    D) Reptilia

    View Answer play_arrow
  • question_answer277) Cray fish is a

    A) crustacean animal

    B) edible fish

    C) poisonous fish

    D) None of the above

    View Answer play_arrow
  • question_answer278) Which of the following is not found in vertebrates?

    A) Bilateral symmetry

    B) Gill opening

    C) Body scales

    D) Cnidoblasts

    View Answer play_arrow
  • question_answer279) A species defined as "the group of actually or potentially inter-breeding natural population producing fertile offspring and reproductive isolated from other groups" The above statement is given by

    A) Carolus Linnaeus

    B) Mayr

    C) J B Lamarck

    D) Charles Darwin

    View Answer play_arrow
  • question_answer280) Origin of life took place in/on

    A) water

    B) air

    C) mountains

    D) land

    View Answer play_arrow
  • question_answer281) Homologous organs are

    A) similar in origin

    B) similar in function

    C) similar in development

    D) similar in behavior

    View Answer play_arrow
  • question_answer282) Vestigial organs are those organs, which are

    A) characteristic of birds

    B) not of much use today

    C) helpful in locomotion

    D) common

    View Answer play_arrow
  • question_answer283) Lamarckian theory deals with

    A) acquired characters

    B) germplasm

    C) struggle for existence

    D) mutation

    View Answer play_arrow
  • question_answer284) A species is produced by loss or disappearance of a few characters founds in parent. It is termed as

    A) progressive species

    B) retrogressive species

    C) successive species

    D) digressive species

    View Answer play_arrow
  • question_answer285) Isinglass, a type of byproduct of fish industry is principally used for

    A) feeding catle, pigs and poultry

    B) preparation of paints and varnishes

    C) clarification of vinegar, wines and beer

    D) production of insulin

    View Answer play_arrow
  • question_answer286) Which one of the following combination is generally recommended for composite fish farming in India?

    A) Caria, Cyprinus, Clarias

    B) Caria, Labeo, Cirrhinus

    C) Cirrhinus, Cyprinus, Channa

    D) Clarias, Chanos, Cyprinus

    View Answer play_arrow
  • question_answer287) The indigenous adult fish, which may be used most effectively for the biological control of mosquitoes is

    A) Aplocheilus

    B) Gambusia

    C) Legistes

    D) Caria

    View Answer play_arrow
  • question_answer288) The disease 'Oriental sore' is caused by

    A) bacteria

    B) virus

    C) Protozoa

    D) fungus

    View Answer play_arrow
  • question_answer289) The carrier of Trypanosoma in man is

    A) house fly

    B) mosquito

    C) honey bee

    D) tse tse fly

    View Answer play_arrow
  • question_answer290) The carrier of virus causing human yellow fever is

    A) mosquito

    B) bug

    C) louse

    D) beetle

    View Answer play_arrow
  • question_answer291) Which of the following is the cancerous state of blood?

    A) Chloremia

    B) Leukaemia

    C) Uremia

    D) Proteinemia

    View Answer play_arrow
  • question_answer292) Against, which of the following does interferon act?

    A) Bacteria

    B) Virus

    C) Fungus

    D) Snake venom

    View Answer play_arrow
  • question_answer293) Which of the following is a sexually transmitted disease?

    A) Malaria

    B) Syphilis

    C) Goiter

    D) Tuberculosis

    View Answer play_arrow
  • question_answer294) Jaundice is caused by

    A) contaminated water

    B) pork

    C) excessive sugar

    D) excessive eating of Curcuma

    View Answer play_arrow
  • question_answer295) AIDS can be transmitted by

    A) blood circulation

    B) handshake

    C) courtship

    D) All of the above

    View Answer play_arrow
  • question_answer296) 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_answer297) 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_answer298) Dudhawa national park is located in

    A) Madhya Pradesh

    B) Himachal Pradesh

    C) Arunachal Pradesh

    D) Uttar Pradesh

    View Answer play_arrow
  • question_answer299) BHC and DDT belong to which class of pesticides?

    A) Organophosphates

    B) Organochlorines

    C) Carbonates

    D) Triazines

    View Answer play_arrow
  • question_answer300) All chordates at one or the other stage have

    A) pharyngeal gill slits

    B) vertebral column

    C) two pairs of pentadacyle limb

    D) a movable jaw

    View Answer play_arrow
  • question_answer301) Which is not character of mitosis?

    A) Leptotene

    B) Zygotene

    C) Pachytene

    D) All of these

    View Answer play_arrow
  • question_answer302) Who called the living matter of the cell as protoplasm?

    A) Purkinje

    B) Virchow

    C) Hooke

    D) Khorana

    View Answer play_arrow
  • question_answer303) How many types of cells are known?

    A) One

    B) Two

    C) Four

    D) Five

    View Answer play_arrow
  • question_answer304) In which, mitosis does not occur?

    A) Green algae

    B) Fungi

    C) Bacteria

    D) higher plants

    View Answer play_arrow
  • question_answer305) A mature plant cell has

    A) cell wall

    B) vacuole

    C) protoplasm

    D) All of these

    View Answer play_arrow
  • question_answer306) In which, plastids are not found?

    A) Blue-green algae

    B) Bacteria

    C) Fungi

    D) All of the above

    View Answer play_arrow
  • question_answer307) Repulsion of homologous chromosomes takes place in

    A) zygotene

    B) leptotene

    C) diakinesis

    D) diplotene

    View Answer play_arrow
  • question_answer308) In eukaryotic cell, the type of ribosome is

    A) Only 70S

    B) Only 80S

    C) Both [a] and [b]

    D) Only SOS

    View Answer play_arrow
  • question_answer309) Synthesis of DNA takes place in

    A) \[{{G}_{1}}\]

    B) \[~{{G}_{2}}\]

    C) S

    D) None of these

    View Answer play_arrow
  • question_answer310) The genetic material of prokaryotic cells is called

    A) nucleus

    B) nucleolus

    C) nucleoid

    D) centrosome

    View Answer play_arrow
  • question_answer311) Which organelle of plant secretes polysaccharide and protein to make cell walls?

    A) Golgi bodies

    B) Lysosome

    C) Mitochondria

    D) Chloroplast

    View Answer play_arrow
  • question_answer312) RNA contains which of the following base, in place of thymine of DNA?

    A) Thymine

    B) Uracil

    C) Adenine

    D) None of these

    View Answer play_arrow
  • question_answer313) The main function of lysosome is in

    A) only extracellular digestion

    B) only intracellular digestion

    C) Both [a] and [d]

    D) None of the above

    View Answer play_arrow
  • question_answer314) Eukaryotic cell has

    A) chromatin fibre

    B) definite nucleus

    C) incipient nucleus

    D) None of these

    View Answer play_arrow
  • question_answer315) At which stage of mitosis, chromatids separse and start moving towards poles?

    A) Prophase

    B) Metaphase

    C) Anaphase

    D) Telophase

    View Answer play_arrow
  • question_answer316) TMV contains

    A) DNA

    B) RNA + Protein

    C) DNA + RNA

    D) DNA + Protein

    View Answer play_arrow
  • question_answer317) Four daughter cells formed after meiosis are

    A) genetically similar

    B) genetically different

    C) anucleate

    D) multinucleate

    View Answer play_arrow
  • question_answer318) The synthesis of lipids and lipoproteins is associated with

    A) endoplasmic reticulum

    B) mitochondria

    C) chloroplast

    D) lysosomes

    View Answer play_arrow
  • question_answer319) DNA strands are and parallel because

    A) H-bonds

    B) phosphate diester bonds

    C) disulphide bonds

    D) phosphate bonds

    View Answer play_arrow
  • question_answer320) Cell theory was proposed by

    A) Schleiden and Schwann

    B) Waston and Crick

    C) Darwin and Wallace

    D) Mendel and Morgan

    View Answer play_arrow
  • question_answer321) During meiosis the division of centromere takes place in

    A) first prophase

    B) first anaphase

    C) second metaphase

    D) second anaphase

    View Answer play_arrow
  • question_answer322) Which one of the following is not found in animal cell?

    A) Nucleus

    B) Golgi bodies

    C) Chloroplast

    D) Mitochondria

    View Answer play_arrow
  • question_answer323) Unit membrane consists of

    A) Lipid + Sugar + Protein

    B) Protein + Lipid + Protein

    C) Lipid + Protein + Lipid

    D) Protein

    View Answer play_arrow
  • question_answer324) Translation is the process, in which

    A) DNA is formed on DNA template

    B) RNA is formed on DNA template

    C) DNA is formed on RNA template

    D) Protein is formed from mRNA

    View Answer play_arrow
  • question_answer325) Linkage was first studied by

    A) Darwin

    B) Morgan

    C) Bateson and Punned

    D) Mendel

    View Answer play_arrow
  • question_answer326) Principal constituents of chromosomes are

    A) DNA

    B) RNA

    C) Both [a] and [b]

    D) tRNA

    View Answer play_arrow
  • question_answer327) Who explained the Operon model for the first time?

    A) Francois Jacob

    B) Jacques Monod

    C) Both [a] and [b]

    D) None of the above

    View Answer play_arrow
  • question_answer328) The enzyme responsible for transcription is

    A) DNA polymerase-I

    B) RNA polymerase

    C) Reverse transcriptase

    D) DNA polymerase-III

    View Answer play_arrow
  • question_answer329) Initiation codon is

    A) AUG

    B) UAG

    C) UGA

    D) UAA

    View Answer play_arrow
  • question_answer330) The direction of DNA replication is

    A) from 5' end towards 3' end

    B) from 3' end towards 5' end

    C) amino terminus to carboxy terminus

    D) carboxy terminus to amino terminus

    View Answer play_arrow
  • question_answer331) Extra chromosomal genetic material found in bacteria is

    A) plasmid

    B) micro some

    C) ribosome

    D) None of these

    View Answer play_arrow
  • question_answer332) Functional unit of gene is

    A) muton

    B) recon

    C) cistron

    D) codon

    View Answer play_arrow
  • question_answer333) A mutant micro-organism unable to synthesize a compound required for its growth but able to grow if the compound is provided, is known as

    A) auxotroph

    B) prototroph

    C) autotroph

    D) None of these

    View Answer play_arrow
  • question_answer334) Incomplete dominance is found in

    A) Pisum sativum

    B) Antirrhinum majus

    C) Both [a] and [b]

    D) None of the above

    View Answer play_arrow
  • question_answer335) Shape of chromosome is determined by

    A) telomere

    B) centromere

    C) chromomere

    D) centrosome

    View Answer play_arrow
  • question_answer336) How many types of genotypes are formed in \[{{F}_{2}}\] progeny obtained from self pollination of a dihybrid \[{{F}_{1}}\]?

    A) 9

    B) 3

    C) 6

    D) 1

    View Answer play_arrow
  • question_answer337) Functioning of structural genes is controlled by

    A) operator

    B) promoter

    C) ligase

    D) regulatory gene

    View Answer play_arrow
  • question_answer338) Domestic cooking gas cylinder is filled with

    A) alcohol

    B) diesel oil

    C) liquid petroleum gas

    D) coal gas

    View Answer play_arrow
  • question_answer339) Sometimes when a virus attacks a bacterium, neither the virus multiplies nor the bacterium does. This phenomenon is called

    A) adsorption

    B) assimilation

    C) lysogeny

    D) viral stability

    View Answer play_arrow
  • question_answer340) An organism having cytoplasm, DNA and RNA but no cell wall is

    A) cyano bacterium

    B) mycoplasma

    C) bacterium

    D) virus

    View Answer play_arrow
  • question_answer341) Among the following which are the smallest organisms?

    A) Bacteria

    B) Mycoplasma

    C) Nostoc

    D) Virus

    View Answer play_arrow
  • question_answer342) The genetic material in viruses is

    A) in some viruses both DNA and RNA

    B) only RNA

    C) only DNA

    D) in some viruses only DNA and in some only RNA

    View Answer play_arrow
  • question_answer343) One of the useful activities of several bacteria is

    A) nitrogen fixation

    B) nitrification

    C) operation of biogeochemical cycles

    D) All of the above

    View Answer play_arrow
  • question_answer344) In a bacterial cell, the organelle with respiratory enzymes is

    A) mitochondria

    B) chondrisome

    C) mesosome

    D) centrosome

    View Answer play_arrow
  • question_answer345) Circular DNA molecule occurs in

    A) viruses

    B) bacteria, chloroplasts and mitochondria

    C) bacteria and chloroplasts only

    D) bacteria only

    View Answer play_arrow
  • question_answer346) A bacteriophage is a

    A) virus attacking another virus

    B) stage in the life cycle of a bacterium

    C) bacterium attacking a virus

    D) virus attacking a bacterium

    View Answer play_arrow
  • question_answer347) The cells of the bacterium Streptococcus remain arranged in the form of

    A) chain

    B) irregular cluster

    C) cube

    D) plate

    View Answer play_arrow
  • question_answer348) The main function of elementary bodies in mycoplasma is

    A) reproduction

    B) nutrition

    C) secretion

    D) respiration

    View Answer play_arrow
  • question_answer349) The water of Holy Gang as river is pure due to the presence of

    A) cyanophages

    B) hydrophytes

    C) bacteria

    D) bacteriophages

    View Answer play_arrow
  • question_answer350) Which one of the following can utilize molecular nitrogen \[({{N}_{2}})\] as nutrient for growth?

    A) Khizobium

    B) Spirogyra

    C) Mucor

    D) Methanococcus

    View Answer play_arrow
  • question_answer351) In Pinus, male and female reproductive structures occur?

    A) On different branches of the same plant

    B) On different plants

    C) On same branch

    D) None of the above

    View Answer play_arrow
  • question_answer352) The cell wall of Spirogyra is made up of

    A) cellulose

    B) pectin

    C) lignin

    D) chitin

    View Answer play_arrow
  • question_answer353) Stomata in Funaria are found in

    A) capsule

    B) foot

    C) seta

    D) nowhere

    View Answer play_arrow
  • question_answer354) A bisexual flower, which never opens in life is known as

    A) homogamous

    B) heterogamous

    C) dichogamous

    D) cleistogamous

    View Answer play_arrow
  • question_answer355) Eichhornia crassipes is a

    A) desert plant

    B) parasite

    C) water plant

    D) terrestrial plant

    View Answer play_arrow
  • question_answer356) Plants of salty seashore wet-lands are call?

    A) halophytes

    B) heliophytes

    C) hydrophytes

    D) saprophytes

    View Answer play_arrow
  • question_answer357) If testa is removed from water soaked gram seed, the remaining structure is

    A) full mature embryo

    B) cotyledons with endosperm and perican

    C) cotyledons filled with starch

    D) None of the above

    View Answer play_arrow
  • question_answer358) Double fertilization means fusion of

    A) one of the polar nuclei with the other one male gamete with egg cell

    B) one of the male gamete with polar nuclei and other with antipodal cells

    C) one of the male gamete with secondary nucleus and the other male gamete with egg cell

    D) one antipodal cell with egg cell and synergid cell with antipodal cell

    View Answer play_arrow
  • question_answer359) Double fertilization was first discovered by Nawaschin (1898) in

    A) Lilium and Fritillaria

    B) mango and sugarcane

    C) papaya and pea

    D) Brassica and candytuft

    View Answer play_arrow
  • question_answer360) In an angiospermic plant, endosperm is formed due to fertilization of secondary nucleus but is absent in some of the seeds viz pea bean Phaseolus (moong) etc. It is due to lack of

    A) certain enzymes

    B) dicotyledonous hormone

    C) growth hormone

    D) None of the above

    View Answer play_arrow
  • question_answer361) A component of xylem is

    A) sieve tube

    B) medullary ray

    C) sclereid

    D) tracheid

    View Answer play_arrow
  • question_answer362) A group of cells alike in forms, function and origin is called

    A) organ

    B) organelle

    C) tissue

    D) None of these

    View Answer play_arrow
  • question_answer363) Hard, lignified, thick walled, long and pointed cells in a plant are

    A) parenchyma

    B) sclerenchyma

    C) collenchyma

    D) sclereids

    View Answer play_arrow
  • question_answer364) The meristem, which develops into a primary vascular tissue is

    A) protonema

    B) promeristem

    C) ground meristem

    D) procambium

    View Answer play_arrow
  • question_answer365) Which one of the following elements is required for photosynthesis oxygen evolution?

    A) Copper

    B) Iron

    C) Manganese

    D) Zinc

    View Answer play_arrow
  • question_answer366) Sinks are related to

    A) transport of organic solutes

    B) stomata

    C) enzymes

    D) phytochrome

    View Answer play_arrow
  • question_answer367) Supply ends in transport of solute are

    A) green leaves and storage organs

    B) root and stem

    C) xylem and phloem

    D) Hormones and enzymes

    View Answer play_arrow
  • question_answer368) Stomata can open at night also in

    A) xerophyte

    B) gametophyte

    C) hydrophyte

    D) None of these

    View Answer play_arrow
  • question_answer369) Who had said that 'transpiration is a necessary evil'?

    A) Curtis

    B) Steward

    C) Anderson

    D) J C Bose

    View Answer play_arrow
  • question_answer370) Agranal chloroplasts occur in certain

    A) succulents

    B) \[{{C}_{3}}-\]plants

    C) \[{{C}_{4}}-\]plants

    D) hydrophytes

    View Answer play_arrow
  • question_answer371) The wavelength of light most absorbed during photosynthesis is

    A) 400nm

    B) 550nm

    C) 660nm

    D) 70nm

    View Answer play_arrow
  • question_answer372) Which are related with photorespiration?

    A) Spherosome

    B) Lysosomes

    C) Glyoxysomes

    D) Peroxisomes

    View Answer play_arrow
  • question_answer373) The end product of glycolysis is

    A) glucose

    B) fructose

    C) pyruvic acid

    D) ethyl alcohol

    View Answer play_arrow
  • question_answer374) RQ is more than one in case of

    A) fat

    B) fructose

    C) glucose

    D) organic add

    View Answer play_arrow
  • question_answer375) Enzymes concerned with transfer of electrons are

    A) hydrolysases

    B) dehydrogenases

    C) transminases

    D) proteases

    View Answer play_arrow
  • question_answer376) Nitrogen is the essential component of

    A) carbohydrates

    B) fats

    C) proteins

    D) oil

    View Answer play_arrow
  • question_answer377) Phytochrome was discovered by

    A) W Went

    B) Gamer and Allard

    C) F F Blackman

    D) R Hill

    View Answer play_arrow
  • question_answer378) The activity of a-amylase in the endospore of barley germinating seed is induced by

    A) ethylene

    B) cytokinin

    C) IAA

    D) gibberellins

    View Answer play_arrow
  • question_answer379) A pigment concerned with both floral induction and seed germination is

    A) florigen

    B) chlorophyll

    C) plastocyanin

    D) phytochrome

    View Answer play_arrow
  • question_answer380) Name the famous plant ecologist

    A) Jagdish Chandra Bose

    B) Birbal Sahani

    C) Ramdeva Mishra

    D) Charles Darwin

    View Answer play_arrow
  • question_answer381) Possibilities of presence of coal in a particular area can be guessed by the study of

    A) Economic botany

    B) Ecology

    C) pollen grain analysis

    D) mining the area

    View Answer play_arrow
  • question_answer382) The significance of ecosystem lies in

    A) flow of energy

    B) cycling of matter

    C) Both [a] and [b]

    D) None of the above

    View Answer play_arrow
  • question_answer383) Biological equilibrium is found among the

    A) producers and consumers

    B) producers and decomposers

    C) producers, consumers and decomposers

    D) producers and light

    View Answer play_arrow
  • question_answer384) The number of individual of a species in a particular ecosystem at a given time remains constant due to

    A) man

    B) parasites

    C) predators

    D) available food

    View Answer play_arrow
  • question_answer385) The two components of an ecosystem are

    A) biotic and abiotic

    B) plants and animals

    C) weeds and micro-organisms

    D) plants and light

    View Answer play_arrow
  • question_answer386) The pyramid of number in a grassland ecosystem is

    A) linear

    B) upright

    C) irregular

    D) inverted

    View Answer play_arrow
  • question_answer387) One of the important effects of \[S{{O}_{2}}\] and its transformation products on plants is

    A) plasmolysis

    B) destruction of chlorophyll

    C) destruction of Golgi bodies

    D) destruction of cell wall

    View Answer play_arrow
  • question_answer388) Major pollutant present in the jet plane emission is

    A) carbon tetrachloride

    B) sulphur dioxide

    C) carbon monoxide

    D) fluorocarbon

    View Answer play_arrow
  • question_answer389) Sewage water is purified for recycling by the action of

    A) light

    B) micro-organisms

    C) aquatic plants

    D) fishes

    View Answer play_arrow
  • question_answer390) Spraying of DDT on crops produces pollution of

    A) soil and water

    B) air and soil

    C) crops and air

    D) air and water

    View Answer play_arrow
  • question_answer391) Which one is not dangerous

    A) bio pollutants

    B) ozone layer

    C) nuclear blast

    D) deforestation

    View Answer play_arrow
  • question_answer392) A drug from root, which causes mental disorder and reduces blood pressure is obtained from

    A) Rauwolfia serpentine

    B) Atropa baladona

    C) Colchicum luteum

    D) Digitalis purpurea

    View Answer play_arrow
  • question_answer393) Maximum sugarcane grown in

    A) Madhya Pradesh

    B) Bihar

    C) Punjab

    D) Uttar Pradesh

    View Answer play_arrow
  • question_answer394) Which one is the riches source of vegetarian protein?

    A) Gram

    B) Soyabean

    C) Wheat

    D) Rice

    View Answer play_arrow
  • question_answer395) Branch of Botany connected with study of food, fibre and wood yielding plant

    A) Ethnobotany

    B) Palaeobotany

    C) Economic botany

    D) Microbiology

    View Answer play_arrow
  • question_answer396) Which fibre crop occupies the maximum area in India?

    A) Jute

    B) Cotton

    C) Flax

    D) Sisal

    View Answer play_arrow
  • question_answer397) Botanical name of tea is

    A) Piper nigrum

    B) Thea/Camellia sinensis

    C) Coffea Arabica

    D) Tectona grandis

    View Answer play_arrow
  • question_answer398) Which can preserve food stuffs?

    A) Salt and sugar

    B) Sugar and vinegar

    C) Vinegar

    D) All of these

    View Answer play_arrow
  • question_answer399) Forest research institute is situated at

    A) Lucknow

    B) Bhopal

    C) Hyderabad

    D) Dehradun

    View Answer play_arrow
  • question_answer400) Humulin is

    A) antibiotic

    B) insulin

    C) haemoglobin

    D) pepsin

    View Answer play_arrow

   



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