Solved papers for Haryana PMT Haryana PMT Solved Paper-2000

done Haryana PMT Solved Paper-2000

  • question_answer1) The efficiency of a Carnot engine operating with reservoir temperature of \[100{}^\circ C\] and \[-23{}^\circ C\] will be:

    A) \[\frac{373-250}{373}\]

    B) \[\frac{275+250}{373}\]

    C) \[\frac{100+23}{100}\]

    D) \[\frac{373-123}{100}\]

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  • question_answer2) Wavelength of light of frequency 100 Hz is :

    A) \[6\times {{10}^{6}}m\]

    B) \[4\times {{10}^{6}}m\]

    C) \[3\times {{10}^{6}}m\]

    D) \[2\times {{10}^{6}}m\]

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  • question_answer3) When a proton is accelerated through IV, then its kinetic energy will be :

    A) 0.5 eV

    B) 1 eV

    C) 10.4 eV

    D) 1820 eV

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  • question_answer4) The degree of freedom of triatomic gas is :

    A) 8

    B) 6

    C) 4

    D) 2

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  • question_answer5) The escape velocity of a sphere of mass m is given by (G = universal gravitational constant, M= mass of the earth and Re = radius of earth) :

    A) \[\sqrt{\frac{2GMm}{{{R}_{e}}}}\]

    B) \[\sqrt{\frac{2GM+{{R}_{e}}}{2{{R}_{e}}}}\]

    C) \[\sqrt{\frac{GM}{2{{R}_{e}}}}\]

    D) \[\sqrt{\frac{2GM}{{{R}_{e}}}}\]

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  • question_answer6) The waves of length 50 cm and 51 cm produced 12 beats per second. The velocity of sound is:

    A) 380 m/s

    B) 2320 m/s

    C) 331 m/s

    D) 306 m/s

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  • question_answer7) The dimensional formula of magnetic flux is :

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

    B) \[\text{ }\!\![\!\!\text{ }{{\text{M}}^{0}}{{\text{L}}^{-2}}{{\text{T}}^{-2}}{{\text{A}}^{-2}}\text{ }\!\!]\!\!\text{ }\]

    C) \[\text{ }\!\![\!\!\text{ M}{{\text{L}}^{\text{0}}}{{\text{T}}^{\text{-2}}}{{\text{A}}^{\text{-2}}}\text{ }\!\!]\!\!\text{ }\]

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

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  • question_answer8) In forward bias the width of potential barrier in a \[p-n\] junction diode :

    A) remains constant

    B) increases

    C) decreases

    D) first (b) then (c)

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  • question_answer9) Colours appear on a thin soap film and on soap bubbles because of the phenomenon of:

    A) diffraction

    B) interference

    C) polarization

    D) refraction

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  • question_answer10) The photoelectric work function for a metal surface is 4.125 eV. The cut off wavelength for this surface is :

    A) \[3000\overset{\text{o}}{\mathop{\text{A}}}\,\]

    B) \[4500\overset{\text{o}}{\mathop{\text{A}}}\,\]

    C) \[6000\overset{\text{o}}{\mathop{\text{A}}}\,\]

    D) \[4125\overset{\text{o}}{\mathop{\text{A}}}\,\]

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  • question_answer11) In a \[p\]-type semiconductor the majority carriers of current are :

    A) neutrons

    B) protons

    C) electrons

    D) holes

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  • question_answer12) Ozone layer blocks the radiation of wavelength:

    A) more than \[3\times 10m\]

    B) less than \[3\times {{10}^{-7}}m\]

    C) equal to \[3\times {{10}^{-7}}m\]

    D) none of these

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  • question_answer13) The moment of inertia of a disc of mass M and radius R about an axis which is tangential to the circumference of the disc and parallel to its diameter is :

    A) \[\frac{4}{5}M{{R}^{2}}\]

    B) \[\frac{5}{4}M{{R}^{2}}\]

    C) \[\frac{2}{5}M{{R}^{2}}\]

    D) \[\frac{5}{2}M{{R}^{2}}\]

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  • question_answer14) A force \[(3\hat{i}+2\hat{j})N\] displaces an object through a distance \[(2\hat{i}+3\hat{j})M\]The work done is:

    A) \[\text{13}\,\text{J}\]

    B) \[15\,\text{J}\]

    C) \[5\,\text{J}\]

    D) \[0\,\text{J}\]

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  • question_answer15) When air is replaced by a dielectric medium of constant K, the maximum force of attraction between two charges separated by a distance :

    A) increases \[\frac{1}{K}\] times

    B) increases \[K\] times times

    C) remains same

    D) decreases \[K\] times

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  • question_answer16) Which of following when added as an impurity into the silicon produces\[n\]-type semi conductor?

    A) Mg

    B) B

    C) Al

    D) P

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  • question_answer17) Two racing cars of masses \[{{m}_{1}}\] and \[{{m}_{2}}\] are moving in a circles of radii \[{{r}_{1}}\] and \[{{r}_{2}}\] respectively. Their speeds are such that each makes a complete round of circle in the same internal of time. The ratio of their angular speeds are :

    A) \[{{m}_{1}}{{m}_{2}}:{{r}_{1}}{{r}_{2}}\]

    B) 1:1

    C) \[{{r}_{1}}:{{r}_{2}}\]

    D) \[{{m}_{2}}:{{m}_{1}}\]

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  • question_answer18) A thin circular ring of mass M and radius r is rotating about its axis with a constant angular velocity \[\omega \]. Two objects each of mass m are attached gently to the opposite ends of diameter of the ring. The ring will now rotate with an angular velocity of :

    A) \[\frac{\omega (M+2m)}{M}\]

    B) \[\frac{\omega M}{(M-2m)}\]

    C) \[\frac{\omega (M-2m)}{(M+2m)}\]

    D) \[\frac{\omega M}{(M+2m)}\]

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  • question_answer19) A black body is at temperature of 500 K, it emits energy at a rate which is proportional to :

    A) \[{{(500)}^{4}}\]

    B) \[{{(500)}^{3}}\]

    C) \[{{(500)}^{\frac{1}{2}}}\]

    D) \[{{(500)}^{2}}\]

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  • question_answer20) If a magnetic dipole is rotated through an angle \[\text{ }\!\!\theta\!\!\text{ }\] with respect to the direction of the magnetic field of intensity H then work done is :

    A) MH sin\[\text{ }\!\!\theta\!\!\text{ }\]

    B) MH (1 - sin \[\text{ }\!\!\theta\!\!\text{ }\])

    C) \[\frac{MH}{2}\]

    D) MH(1-cos\[\text{ }\!\!\theta\!\!\text{ }\])

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  • question_answer21) A torque of a force \[\vec{F}=-3\hat{i}+5\hat{k}\] acting at a point \[\vec{r}=7\hat{i}+3\hat{j}+\hat{k}\]about the origin is :

    A) \[4\hat{i}-4\hat{j}+6\hat{k}\]

    B) \[14\hat{i}+14\hat{j}-6\hat{k}\]

    C) \[-21\hat{i}+\hat{j}-4\hat{k}\]

    D) \[14\hat{j}-38\hat{j}+16\hat{k}\]

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  • question_answer22) The momentum of a particle is increased by 100% then kinetic energy increases by :

    A) 100%

    B) 300%

    C) 200%

    D) 150%

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  • question_answer23) The internal resistance of a cell of emf \[12\,V\,is\,5\times 10{{-}^{2}}\Omega \]It is connected across an unknown resistance, the voltage across the cell when a current of 60 amp is drawn from it, is :

    A) 10V

    B) 6V

    C) 12 V

    D) 9 V

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  • question_answer24) Efficiency of a Carnot engine is 100% if :

    A) \[{{T}_{1}}=0K\]

    B) \[{{T}_{1}}=273K\]

    C) \[T_{1}^{2}=273K\]

    D) \[{{T}_{2}}\]=0K

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  • question_answer25) In a transverse progressive wave of amplitude A the maximum particle velocity is four times of its wave velocity. The wavelength of the wave is:

    A) \[\frac{\pi A}{4}\]

    B) \[\frac{\pi A}{2}\]

    C) \[2\pi A\]

    D) \[4\pi A\]

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  • question_answer26) A black body is heated from \[27{}^\circ C\] to \[927{}^\circ C\]. The ratio of radiation emitted will be :

    A) 1:8

    B) 1:16

    C) 1:128

    D) 1:256

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  • question_answer27) The potential at a point due to a positive charge of 100 \[\mu \]C at a distance of 9 m, is :

    A) \[{{10}^{5}}V\]

    B) \[{{10}^{8}}V\]

    C) \[{{10}^{6}}V\]

    D) \[{{10}^{3}}V\]

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  • question_answer28) Candela is a unit of :

    A) sound

    B) illuminance

    C) luminous flux

    D) cuminous intensity

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  • question_answer29) Which one of the following waves do not show the polarisation?

    A) Sinusoidal waves

    B) Longitudinal waves in gas

    C) Transverse waves in gas

    D) Electromagnetic waves

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  • question_answer30) A capacitor of 20 \[\mu \]F and charged up to 500 V, is connected in parallel to another capacitor of 10 \[\mu \] charged to 200 V. The common potential will be :

    A) 600 V

    B) 400 V

    C) 100 V

    D) 200 V

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  • question_answer31) Which is the correct expression for half-life?

    A) \[{{t}_{1/2}}=\lambda \log 2\]

    B) \[{{t}_{1/2}}=\frac{\log 2}{\lambda }\]

    C) \[{{t}_{1/2}}=\frac{2.303\log 2}{\lambda }\]

    D) none of these

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  • question_answer32) A man of height 6 feet stands in front of a plane mirror. The vertical height of the mirror, so that the man is able to see himself fully, is :

    A) 8 feet

    B) 1.5 feet

    C) 4.5 feet

    D) 3 feet

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  • question_answer33) The current gains of the semiconductor devices are \[\alpha \]\[=\left( \frac{{{i}_{c}}}{{{i}_{c}}} \right)\]and \[\beta \]=\[\left( \frac{{{i}_{c}}}{{{i}_{b}}} \right)\]The relation between \[\alpha \]and \[\beta \]are:

    A) \[\beta =\frac{\alpha +1}{\alpha }\]

    B) \[\beta =\frac{\alpha }{1-\alpha }\]

    C) \[\alpha =\frac{\beta }{1-\beta }\]

    D) \[\alpha =\frac{1-\beta }{\beta }\]

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  • question_answer34) A proton moving with a velocity of \[2.5\times {{10}^{7}}m/s,\] enters a magnetic field of intensity 2.5T making an angle 30? with the magnetic field. The force on the proton is :

    A) \[12.5\times {{10}^{-12}}N\]

    B) \[5\times {{10}^{-12}}N\]

    C) \[9\times {{10}^{-12}}N\]

    D) none of these

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  • question_answer35) A conductor of length 1m carrying current of 1 amp is placed parallel to a magnetic field of 1 gauss. The magnetic force acting on the conductor is :

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

    B) 1 dyne

    C) IN

    D) zero

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  • question_answer36) Currents of 10 A and 2 A are passed through two parallel wires A and B respectively in opposite directions. If the wire is uniformly long and the length of wire B is 2m. The force on conductor B at separation 10 cm from A will be :

    A) \[40\times {{10}^{-7}}N\]

    B) 8\[\pi \] \[\times {{10}^{-7}}N\]

    C) \[8\times {{10}^{-5}}N\]

    D) \[4\times {{10}^{-5}}N\]

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  • question_answer37) A man runs towards mirror at a speed of 4 m/s with what speed will his image move towards and relative to object?

    A) 8 m/s

    B) 4 m/s

    C) 2 m/s

    D) None of these

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  • question_answer38) Two bulbs of rating 200 V, 40 W and 200V 100W are used in the house, which of the following statement is correct:

    A) Resistance of 100 watt is greater

    B) Resistance of both bulbs are equal

    C) Resistance of 40 watt is greater

    D) None of these

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  • question_answer39) The position \[x\] of a particle varying with time \[t\] as \[x=a{{t}^{2}}b{{t}^{3}}\] The acceleration of the particle at time t will be equal to :

    A) zero

    B) \[\frac{a}{3b}\]

    C) \[\frac{a}{b}\]

    D) \[\frac{2a}{3b}\]

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  • question_answer40) Two bodies of equal masses m1 and m2 moving along the same straight line with velocities + 3 m/s and - 5 m/s respectively collide elastically, their velocities after collision will be :

    A) - 5 m/s, 3 m/s

    B) - 6 m/s, 4 m/s

    C) - 4 m/s, both

    D) 3 m/s, - 5 m/s

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  • question_answer41) A nucleus \[_{n}{{X}^{m-4}}\] emits one \[\alpha \] and two \[\beta \] particles. The resulting nucleus will be :

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

    B) \[_{n-2}X{{m}^{-4}}\]

    C) \[_{n-1}X{{m}^{-2}}\]

    D) none of these

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  • question_answer42) In an isothermal change of an ideal gas \[\Delta \mathsf{U}=0.\]The change in heat energy \[\Delta Q\] is equal to:

    A) 2 W

    B) 1.5 W

    C) 0.5 W

    D) 1 W

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  • question_answer43) A point charge \[Q\] lies on the perpendicular bisector of an electrical dipole of dipole moment p. If the distance of \[Q\] from the dipole is r (much larger than the size of dipole), then the electric field at \[Q\] is proportional to :

    A) p and r-3

    B) p2 and r3

    C) p and r-2

    D) none of these

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  • question_answer44) Identify the vector quantity among the following :

    A) angular momentum

    B) distance

    C) energy

    D) heat

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  • question_answer45) The resistance of discharge tube is :

    A) non ohmic

    B) zero

    C) ohmic

    D) none of these

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  • question_answer46) After 1 a and 2 P emissions :

    A) mass number reduces by 1

    B) atomic number remains same

    C) mass number reduces by 2

    D) atomic number reduces by 4

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  • question_answer47) A parallel plate condenser with oil between plates (dielectric constant of oil K = 2) has a capacitance C. If the oil is removed, then capacitance of the capacitor becomes :

    A) C/2

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

    C) C

    D) \[\frac{\sqrt{2}}{C}\]

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  • question_answer48) A long hollow copper pipe carries a current, the magnetic field produced will be :

    A) both inside and outside the pipe

    B) neither inside nor outside the pipe

    C) inside the pipe only

    D) outside the pipe only

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  • question_answer49) A transverse wave is represented by the equation \[y=yo\,\sin \,\frac{2\pi }{\lambda }\]\[(ut=x)\] for what value of \[\lambda \] is the particle velocity equal to two times the wave velocity?

    A) \[\lambda =\pi yo\]

    B) \[\lambda =\frac{\pi yo}{4.}\]

    C) \[\lambda =4\pi yo\]

    D) \[\lambda =2\pi yo\]

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  • question_answer50) Velocity of light is maximum in :

    A) vacuum

    B) diamond

    C) glass

    D) water

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  • question_answer51) The unit of illuminance is :

    A) watt

    B) candela

    C) lumen

    D) lux

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  • question_answer52) A isotropic point source of 100 candela is fastened to the ceiling of the room. Then the total luminous flux falling in the whole room is :

    A) 1256 lumen

    B) 628 lumen

    C) 314 lumen

    D) none of these

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  • question_answer53) The distance between two coherent sours is 1 mm. The screen is placed at a distance of 1 m from the source. If the distance of third bright fringe is 1.2 mm from the central fringe. The wavelength of light used is :

    A) \[7200\overset{\text{o}}{\mathop{\text{A}}}\,\]

    B) \[6800\overset{\text{o}}{\mathop{\text{A}}}\,\]

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

    D) \[4000\overset{\text{o}}{\mathop{\text{A}}}\,\]

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  • question_answer54) The wave theory of light was given by :

    A) Planck

    B) Thomas Young

    C) Newton

    D) Huygens

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  • question_answer55) When a ray of light is refracted from one medium into another medium. The wave length changes from \[4000\overset{\text{o}}{\mathop{\text{A}}}\,\] to \[6000\overset{\text{o}}{\mathop{\text{A}}}\,\]. The critical angle for a ray from second medium to first medium will be :

    A)  \[{{\sin }^{-1}}\left( \frac{2}{\sqrt{13}} \right)\]                               

    B) \[{{\tan }^{-1}}\left( \frac{3}{2} \right)\]

    C) \[{{\cos }^{-1}}\left( \frac{1}{7} \right)\]                               

    D) \[{{\sin }^{-1}}\left( \frac{2}{3} \right)\]

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  • question_answer56) A stone lies at the bottom of a stream. A boy wants to hit it with a stick. Taking aim the boy holds the stick in the air at an angle of \[45{}^\circ \]. At what distance from the stone will the stick hit the bottom. If the depth is 3; cm (given \[_{a}{{u}_{w}}\] 4/3) :

    A) 12\[\sqrt{2}\] cm

    B) 16 cm

    C) 12 cm

    D) 8 cm

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  • question_answer57) If \[{{\omega }_{1}}\]and \[{{\omega }_{2}}\] are dispersive powers of lenses of focal length\[{{f}_{1}}\] and\[{{f}_{2}}\] respectively. Then the conditions of chromatic aberration for two. lenses in contact is :

    A) \[\frac{{{\omega }_{1}}}{{{\omega }_{1}}}=\,\,\frac{{{f}_{2}}}{{{f}_{1}}}\]

    B) \[\frac{{{\omega }_{2}}}{{{\omega }_{1}}}=\frac{{{f}_{1}}}{{{f}_{2}}}\]

    C) \[\frac{{{\omega }_{1}}}{{{\omega }_{2}}}=\frac{{{f}_{1}}}{{{f}_{2}}}\]

    D) \[\frac{{{\omega }_{1}}}{{{\omega }_{2}}}=\frac{{{f}_{1}}}{{{f}_{2}}}\]

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  • question_answer58) The electric field required to just balance a liquid drop of mass \[2.4\times {{10}^{-12}}kg\] and charge \[2.4\times {{10}^{-18}}\] coulomb, is:

    A) \[9.8\times {{10}^{6}}N/C\]

    B) \[4.9\times {{10}^{6}}N/C\]

    C) \[6.8\times {{10}^{6}}N/C\]

    D) none of these

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  • question_answer59) When the distance between two charged particles is halved. The coulomb force between them becomes :

    A) four times

    B) double

    C) one half

    D) one fourth

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  • question_answer60) The capacitance of a parallel plate air capacitor is 10 \[\mu \]F. If now the overlapping area of plates is doubled and separation between the plates is halved, the new capacitance will be :

    A) 60\[\text{ }\!\!\mu\!\!\text{ F}\]

    B) 10\[\text{ }\!\!\mu\!\!\text{ F}\]

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

    D) 40 \[\text{ }\!\!\mu\!\!\text{ F}\]

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  • question_answer61) Three different capacitors are connected in series. On them there will be :

    A) equal charge and unequal potential

    B) equal charge

    C) equal potential

    D) none of these

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  • question_answer62) The plates of a parallel plate capacitor are charged with a battery so that the plates of the capacitor have acquired the potential- difference equal to emf of the battery. The ratio of the work done by the battery and energy stored in capacitor will be :

    A) 4:1

    B) 2:1

    C) 1:2

    D) 1 :1

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  • question_answer63) According to Joule, the heat produced in resistor of resistance R carrying current; is given by

    A) \[\frac{iRt}{J}kcal\]

    B) \[{{i}^{2}}Rt\times 4.2\times {{10}^{3}}kcal\]

    C) \[{{i}^{2}}Rt\,kcal\]

    D) \[\frac{{{i}^{2}}Rt}{4.2\times {{10}^{3}}}kcal\]

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  • question_answer64) A \[3{}^\circ C\] rise of temperature is observed in a conductor by passing a certain current, when the current is doubled, the rise. of temperature will be :

    A) \[3{}^\circ C\]

    B) \[9{}^\circ C\]

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

    D) \[15{}^\circ C\]

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  • question_answer65) Water falls from a height 500 m. What is the raise in temperature of water at bottom. If the whole energy remains in the water? (Specific heat of water \[4200\text{ }J/kg\text{ }{}^\circ C\]):

    A) \[0.19{}^\circ C\]

    B) \[2.3{}^\circ C\]

    C) \[0.59{}^\circ C\]

    D) \[1.17{}^\circ C\]

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  • question_answer66) Which of the following electromagnetic radiations have the smallest wave length?

    A) y-rays

    B) X-rays

    C) Microwave

    D) U.V. waves

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  • question_answer67) A neutron having mass of \[1.67\times {{10}^{-27}}\] and moving at.\[{{10}^{8}}m/s\] collides with a deuteron at rest and sticks to it. If the mass of the deuteron is \[3.34\times {{10}^{-27}}kg.\]The speed of the combination is :

    A) \[4.33\times {{10}^{7}}m/s\]

    B) \[2.33\times {{10}^{7}}m/s\]

    C) \[1.67\times {{10}^{7}}m/s\]

    D) \[3.33\times {{10}^{7}}m/s\]

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  • question_answer68) The following figure represents a logic symbol, this is equivalent to :

    A) NAND gate

    B) NOT gate

    C) OR gate

    D) AND gate

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  • question_answer69) 1 amu unit is equivalent to :

    A) 931 Me V

    B) 931 keV

    C) 931 eV

    D) 1 eV

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  • question_answer70) The radius of a nucleus, with nucleon number \[16is3\times {{10}^{-15}}m.\] The radius of other nucleus with nucleon number 128, will be :

    A) \[6\times {{10}^{-15}}m\]

    B) \[3\times {{10}^{-15}}m\]

    C) \[4.5\times {{10}^{-15}}m\]

    D) none of these

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  • question_answer71) Assuming that the junctions diode is ideal the current through the diode is :

    A) 200 mA

    B) 20 mA

    C) 2 mA

    D) zero

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  • question_answer72) \[\beta \]-rays are :

    A) electromagnetic waves

    B) fast moving electrons

    C) singly ionised gas atoms

    D) helium nuclei

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  • question_answer73) Half-life of \[B{{i}^{210}}\] is 5 days. If we start with 50000 atoms of this isotope. The number of atoms left over after 10 days is :

    A) 20000

    B) 12500

    C) 5000

    D) 25000

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  • question_answer74) Hubbies law is expressed as \[u\]= speed of recession, r = distance of Galaxy and H= Hubbies constant) :

    A) \[\upsilon =\frac{H}{{{r}^{2}}}\]

    B) \[\upsilon =\frac{H}{r}\]

    C) \[\upsilon =Hr\]

    D) \[\upsilon =H{{r}^{2}}\]

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  • question_answer75) de Broglie wavelength vary with momentum of particle as :

    A) \[\lambda \propto \frac{1}{p}\]

    B) \[\lambda \propto p\]

    C) both of these

    D) none of these

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  • question_answer76) In which of the following the angle between the two covalent bonds is maximum?

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

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

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

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

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  • question_answer77) Which of the following is the correct relation of the first law of thermodynamics?

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

    B) \[\Delta E=Q+W\]

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

    D) \[\Delta E=\Delta Q+W\]

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  • question_answer78) The radium and uranium atoms in a sample of uranium mineral are in the ratio of \[1:2.8\times {{10}^{6}}\] If half-life period of radium is \[1620\] year, the half-life period of uranium will be:

    A) \[4.53\times {{10}^{9}}year\]

    B) \[45.3\times {{10}^{9}}year\]

    C) \[4.53\times {{10}^{10}}year\]

    D) \[45.3\times {{10}^{10}}year\]

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  • question_answer79) Specific conductance of \[0.1\text{ }NKCl\]solution at \[{{23}^{o}}C\]is\[0.012\text{ }oh{{m}^{-1}}c{{m}^{-1}}\]. Resistance of cell containing the solution at same temperature was found to be\[55ohm\]. The cell constant is:

    A) \[0.0616\text{ }c{{m}^{-1}}\]

    B) \[0.616\text{ }c{{m}^{-1}}\]

    C) \[6.16c{{m}^{-1}}\]

    D) \[616\text{ }c{{m}^{-1}}\]

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  • question_answer80) The solubility of a gas is directly proportional to the pressure of the gas. This statement is based on:

    A) Kohlrausch law

    B) Raoults law

    C) Henrys law

    D) None of these

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  • question_answer81) The powerful explosive RDX is formed during the nitration of:

    A) Glycerol

    B) toluene

    C) Urotropine

    D) phenol

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  • question_answer82) On dissolving 1 mole each of the following acids in 1 litre water, the acid which do not give a solution of 1 N strength is:

    A) \[{{H}_{3}}P{{O}_{4}}\]

    B) \[HCl{{O}_{4}}\]

    C) \[HN{{O}_{3}}~\]

    D) \[HCl\]

    View Answer play_arrow
  • question_answer83) The strongest reducing agent of the alkali metal is:

    A) \[Na\]

    B) \[Li\]

    C) \[K\]

    D) \[Cs\]

    View Answer play_arrow
  • question_answer84) Oxidation number of N in \[HN{{O}_{3}}\] is:

    A) \[+3.5\]

    B) \[-3.5\]

    C) \[+5\]

    D) \[-5\]

    View Answer play_arrow
  • question_answer85) In DNA, the complementary bases are:

    A) Adenine and thymine; .guanine and uracil

    B) Uracil and adenine; cytosine and guanine

    C) Adenine and guanine; thymine and cytosine

    D) Adenine and thymine; guanine and cytosine

    View Answer play_arrow
  • question_answer86) \[{{H}_{2}}{{O}_{2}}\] is used as:

    A) An acid only

    B) An oxidant only

    C) An oxidant, reductant and acid

    D) A reductant only

    View Answer play_arrow
  • question_answer87) At the critical micelle concentration, the surfactant molecules:

    A) Associate

    B) Dissociate

    C) Decompose

    D) Become completely soluble

    View Answer play_arrow
  • question_answer88) Aniline is usually purified by:

    A) Chromatographic

    B) Fractional crystallization

    C) By adding oxalic acid

    D) Steam distillation

    View Answer play_arrow
  • question_answer89) Bond formed in crystal by anion and cation is:

    A) Ionic

    B) dipole

    C) Covalent

    D) metallic

    View Answer play_arrow
  • question_answer90) Given, (i) \[C+{{O}_{2}}\xrightarrow{{}}C{{O}_{2}};\,\,\Delta {{H}^{o}}=-xkJ\] (ii) \[2C+{{O}_{2}}\xrightarrow{{}}2C{{O}_{2}};\Delta =-ykJ\] The enthalpy of formation of \[C{{O}_{2}}\] will be:

    A) \[2x-y\]

    B) \[y-2x\]

    C) \[\frac{(2x-y)}{2}\]

    D) \[\frac{(y-2x)}{2}\]

    View Answer play_arrow
  • question_answer91) When enthalpy and entropy change for a chemical reaction are \[-2.5\times {{10}^{3}}\]joules and \[7.4\text{ }J\text{ }de{{g}^{-1}}\]respectively. The reaction at \[298K\]is:

    A) Spontaneous

    B) Non-spontaneous

    C) reversible

    D) Irreversible

    View Answer play_arrow
  • question_answer92) Acetylene and \[HCHO\]react in presence of copper acetylide catalyst to form:

    A) \[1-butyne-1,4,\text{ }diol\]

    B) \[2-butyne-1,2,\text{ }diol\]

    C) \[2-butyne-1,4,\text{ }diol\]

    D) None of these

    View Answer play_arrow
  • question_answer93) During the titration of \[KMn{{O}_{4}}\]with oxalic acid in acid medium, oxidation number of \[M{{n}^{+1}}\] change to:

    A) \[0\]

    B) \[+2\]

    C) \[+3\]

    D) \[+5\]

    View Answer play_arrow
  • question_answer94) The orbitals of same energy level providing the most efficient overlapping are:

    A) \[sp-sp\]

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

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

    D) all of these

    View Answer play_arrow
  • question_answer95) Hydrogen peroxide is reduced by:

    A) Ozone

    B) Barium peroxide

    C) Acidic solution of \[~KMn{{O}_{4}}\]

    D) Lead sulphide suspension

    View Answer play_arrow
  • question_answer96) Red phosphorus is less reactive than yellow phosphorus because:

    A) It is highly polymerized

    B) It is insoluble in \[CC{{l}_{4}}\]

    C) It is red in colour

    D) It is hard

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  • question_answer97) \[C{{F}_{2}}=C{{F}_{2}}\]is a unit of:

    A) Teflon

    B) Polyethene

    C) Backelite

    D) buha-S

    View Answer play_arrow
  • question_answer98) In Williamsons synthesis:

    A) An alcohol is heated with cone. \[{{H}_{2}}S{{O}_{4}}\]at \[{{140}^{o}}C\]

    B) An alkyl halide is treated with sodium

    C) An alkyl halide is treated with sodium alkoxide

    D) None of these

    View Answer play_arrow
  • question_answer99) Which of the following oxides is the most acidic?

    A) \[S{{b}_{2}}{{O}_{5}}\]

    B) \[A{{s}_{2}}{{O}_{5}}\]

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

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

    View Answer play_arrow
  • question_answer100) The solubility product \[({{K}_{sp}})\] of \[Ca{{F}_{2}}\] is \[4\times {{10}^{-11}}\]. The solubility of \[CaF\] is:

    A) \[0.017g\text{ }litr{{e}^{-1}}~~~\]

    B) \[0.071\text{ }g\text{ }litr{{e}^{-1}}\]

    C) \[0.17g\text{ }litr{{e}^{-1}}\]

    D) \[1.7\text{ }g\text{ }litr{{e}^{-1}}\]

    View Answer play_arrow
  • question_answer101) Identify the product D in the following series of reaction: \[C{{H}_{3}}COOH\xrightarrow{LiAl{{H}_{4}}}A\xrightarrow{{{H}^{+}},443K}\]\[B\xrightarrow{B{{r}_{2}}}C\xrightarrow{alc.\,KOH}D\]Acetic acid:

    A) acetylene

    B) methane

    C) benzaldehyde

    D) alcohol

    View Answer play_arrow
  • question_answer102) In the following radioactive decay, \[_{92}{{X}^{232}}{{\xrightarrow{{}}}_{89}}{{Y}^{220}}\], how many a- and (3-particles are ejected from X to Y?

    A) \[5\alpha \] and \[5\beta \]

    B) \[5\alpha \] and \[4\beta \]

    C) \[5\alpha \] and \[3\beta \]

    D) \[3\alpha \] and \[3\beta \]

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  • question_answer103) Which of the following element has the maximum electron affinity?

    A) \[F\]

    B) \[Cl\]

    C) \[Br\]

    D) \[I\]

    View Answer play_arrow
  • question_answer104) Oppenauer oxidation is the reverse process of:

    A) Merwein Pondrof verley reduction

    B) Clemmensens reduction

    C) Rosemund reduction

    D) Wolf Kishner reduction

    View Answer play_arrow
  • question_answer105) Purification of aluminium by electrolyte refining, is known as:

    A) Bayers process

    B) Halls process

    C) Serpecks process

    D) Hoopes process

    View Answer play_arrow
  • question_answer106) The atomic weight of helium is 4. The number of atoms in 1 g of helium is:

    A) \[6.02\times {{10}^{23}}\times 4\]

    B) \[6.02\times {{10}^{23}}\]

    C) \[\frac{6.02\times {{10}^{23}}}{2}\]

    D) \[\frac{6.02\times {{10}^{23}}}{4}\]

    View Answer play_arrow
  • question_answer107) Bell metal is an alloy of:

    A) \[Cu+Ni\]

    B) \[Cu+Pb\]

    C) \[Cu+Sn\]

    D) \[Cu+Zn\]

    View Answer play_arrow
  • question_answer108) Hoffmann rearrangement during the conversion of an amide to amine is:

    A) Intermolecular

    B) Intra molecular

    C) Both (a) and (b)

    D) None of these

    View Answer play_arrow
  • question_answer109) In the reaction\[C{{H}_{3}}N+2H\xrightarrow[Ether]{HCl}X\xrightarrow{Boiling\,{{H}_{2}}O}Y\] The product Y Is:

    A) Acetaldehyde

    B) Acetone

    C) Dimethylamine

    D) Ethanamine

    View Answer play_arrow
  • question_answer110) Natural rubber is a polymer of:

    A) cis-isoprene

    B) trans isoprene

    C) Cis and trans isoprene

    D) None of these above

    View Answer play_arrow
  • question_answer111) Cassiterite is an ore of:

    A) \[Sn\]

    B) \[Ni\]

    C) \[Sb\]

    D) \[Mn\]

    View Answer play_arrow
  • question_answer112) lodoform gives a precipitate with \[AgN{{O}_{3}}\] on heating but chloroform does not because:

    A) \[C-I\]bond in iodoform is weak and \[C-Cl\] bond in chloroform is strong

    B) Chloroform is covalent

    C) Iodoform is ionic

    D) None of these

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  • question_answer113) Which of the following is the sweetest sugar?

    A) Glucose

    B) Maltose

    C) Fructose

    D) Sucrose

    View Answer play_arrow
  • question_answer114) Rate of esterification of \[{{C}_{2}}{{H}_{5}}OH\] is maximum in case of:

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

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

    C) \[HCOOH\]

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

    View Answer play_arrow
  • question_answer115) Percentage of lead in lead pencil is:

    A) \[30\]

    B) \[20\]

    C) \[10\]

    D) \[0\]

    View Answer play_arrow
  • question_answer116) Deficiency of the following metal ion causes anaemia:

    A) \[Na\]

    B) \[Fe\]

    C) \[Zn\]

    D) \[Mg\]

    View Answer play_arrow
  • question_answer117) Which of the following compounds will be most easily attacked by an electrophile?

    A) \[{{C}_{6}}{{H}_{5}}\]

    B) \[{{C}_{6}}{{H}_{5}}Cl\]

    C) \[{{C}_{6}}{{H}_{5}}OH\]

    D) \[{{C}_{6}}{{H}_{5}}C{{H}_{3}}\]

    View Answer play_arrow
  • question_answer118) A 5% solution of cane sugar (molecular weight 342) is isotonic with 1% solution of substance X. The molecular weight of X is:

    A) \[34.2\]

    B) \[136.2\]

    C) \[68.4\]

    D) \[171.2\]

    View Answer play_arrow
  • question_answer119) Terylene is a condensation polymer of ethylene glycol and:

    A) Salicylic acid

    B) Phthallic acid

    C) Terephthalic acid

    D) benzoic acid

    View Answer play_arrow
  • question_answer120) Electric refining is used for refining of:

    A) \[Fe\]

    B) \[Cu\]

    C) \[Pb\]

    D) None of these

    View Answer play_arrow
  • question_answer121) The correct order of the \[O-O\] bond length in \[{{O}_{2}}\], \[{{H}_{2}}O\] and \[{{O}_{3}}\] is:

    A) \[{{H}_{2}}{{O}_{2}}>{{O}_{3}}>{{O}_{2}}\]

    B) \[{{O}_{2}}>{{H}_{2}}{{O}_{2}}>{{O}_{3}}\]

    C) \[{{O}_{3}}>{{H}_{2}}{{O}_{2}}>{{O}_{2}}\]

    D) \[{{O}_{2}}>{{O}_{3}}>{{H}_{2}}{{O}_{2}}\]

    View Answer play_arrow
  • question_answer122) Silver metal is obtained by:

    A) Magnetic separation

    B) Carbon reduction process

    C) Froth floatation process

    D) Parkes process

    View Answer play_arrow
  • question_answer123) The concentration units, independent of temperature, would be:

    A) Weight volume per cent

    B) Normality

    C) Molality

    D) Molarity

    View Answer play_arrow
  • question_answer124) What is the half-life of a radioactive substance is 87.5% of a given amount of the substance disintegrates in 40 minutes?

    A) \[10\text{ }min\]

    B) \[13.58\text{ }min\]

    C) \[20\text{ }min\]

    D) \[160\text{ }min\]

    View Answer play_arrow
  • question_answer125) Oxidation state of \[Fe\] in \[F{{e}_{2}}{{O}_{4}}\]is:

    A) \[8/3\]

    B) \[3/2\]

    C) \[5/4\]

    D) \[4/5\]

    View Answer play_arrow
  • question_answer126) In the reaction\[X+Y\xrightarrow{{}}XY\], if the concentration of X and Y are doubled, the rate of reaction will be:

    A) Increased two times

    B) Increased four times

    C) Decreased one times

    D) Decreased two times

    View Answer play_arrow
  • question_answer127) Who modified Bohrs theory by Introducing elliptical orbits for electron path?

    A) Sommer field

    B) Rutherford

    C) Hund

    D) Thomson

    View Answer play_arrow
  • question_answer128) On increasing the pressure three fold, the rate of reaction of \[2{{H}_{2}}S\text{ }+{{O}_{2}}\xrightarrow{{}}products\] would increase:

    A) \[3times\]

    B) \[9\text{ }times\]

    C) \[12\text{ }times\]

    D) \[27\text{ }times\]

    View Answer play_arrow
  • question_answer129) Which of the following has more unpaired d-electrons?

    A) \[C{{u}^{+}}\]

    B) \[{{N}^{3+}}\]

    C) \[Z{{n}^{+}}\]

    D) \[F{{e}^{2+}}\]

    View Answer play_arrow
  • question_answer130) On adding A to\[AB(s)A(g)+B(g)\], the new equilibrium concentration of .A becomes double. The equilibrium concentration of B would become:

    A) Twice of its original value

    B) Half of its original value

    C) one fourth of its original value

    D) One eight of its original value

    View Answer play_arrow
  • question_answer131) The pH of blood is:

    A) \[<7\]

    B) \[>10\]

    C) \[>8\] but \[<9\]

    D) \[>7\] but \[<8\]

    View Answer play_arrow
  • question_answer132) The conjugate base of \[{{H}_{3}}B{{O}_{3}}\]is:

    A) \[HB{{O}_{3}}^{2-}\]

    B) \[{{H}_{4}}B{{O}_{3}}^{+}\]

    C) \[{{H}_{2}}B{{O}_{3}}^{-}\]

    D) \[B{{(OH)}_{4}}^{-}\]

    View Answer play_arrow
  • question_answer133) For a reaction to occur spontaneously :

    A) \[\Delta S\] must be negative

    B) \[\Delta H\] must be negative

    C) \[(\Delta H+T\Delta S)\] must be negative

    D) \[(\Delta H-T\Delta S)\] must be negative

    View Answer play_arrow
  • question_answer134) Energy required to dissociate \[4g\] of gaseous hydrogen in to free gaseous atoms is \[208kcal\] at \[{{25}^{o}}C\]. The bond energy of \[H-H\] bond will be:

    A) \[104kcal\]

    B) \[104kcal\]

    C) \[10.4\text{ }kcal\]

    D) \[1040\text{ }kcal\]

    View Answer play_arrow
  • question_answer135) For a first-order reaction, the half-life period is independent of:

    A) First power of final concentration

    B) Square root of final concentration

    C) Cube root of initial concentration

    D) Initial concentration

    View Answer play_arrow
  • question_answer136) Which one of the following is not the characteristics of alkali metals?

    A) Their ions are isoeleccronic with noble gases

    B) High ionisation energies

    C) Low electronegathity

    D) Low molecular print

    View Answer play_arrow
  • question_answer137) What is the correct sequence of bond order?

    A) \[{{O}_{2}}^{+}>{{O}_{2}}>{{O}_{2}}^{-}\]

    B) \[{{O}_{2}}^{-}>{{O}_{2}}^{+}>{{O}_{2}}\]

    C) \[{{O}_{2}}^{+}>{{O}_{2}}^{-}>{{O}_{2}}\]

    D) \[{{O}_{2}}>{{O}_{2}}^{-}>{{O}_{2}}^{+}\]

    View Answer play_arrow
  • question_answer138) Coal gas is a mixture of:

    A) \[C{{H}_{4}}+CO\]

    B) \[{{H}_{2}}O+CO\]

    C) \[{{H}_{2}}+CO\]

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

    View Answer play_arrow
  • question_answer139) Element with electronic configuration Is , \[2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{10}}4{{s}^{2}}4{{p}^{6}}4{{d}^{10}},5{{s}^{2}}4{{p}^{3}}\] belongs to the following group of the periodic table:

    A) 2nd

    B) 3rd

    C) 5th

    D) 7th

    View Answer play_arrow
  • question_answer140) The number of geometrical isomers in case of \[C{{H}_{3}}CH=CH-CH=CH-{{C}_{2}}{{H}_{5}}\] is:

    A) \[6\]

    B) \[5\]

    C) \[4\]

    D) \[2\]

    View Answer play_arrow
  • question_answer141) The atomic radius of elements of which of the following series would be nearly the same?

    A) \[F,Cl,Br,I\]

    B) \[Fe,Co,Ni,Cu\]

    C) \[Na,K,Rb,Cs\]

    D) \[Li,Be,B,C\]

    View Answer play_arrow
  • question_answer142) The structure of \[CsCl\]is:

    A) Octahedral lattice

    B) Face centred cubic lattice

    C) Body centred cubic lattice

    D) None of these

    View Answer play_arrow
  • question_answer143) The concentration units independent of temperature would be:

    A) Mass volume percent

    B) Normality

    C) Molarity

    D) Molality

    View Answer play_arrow
  • question_answer144) An aqueous solution containing \[1g\]urea I boils at\[{{100.25}^{o}}C\]. The aqueous solution containing \[3g\]of glucose in the same volume will boil at:

    A) \[{{100}^{o}}C\]

    B) \[{{100.5}^{o}}C\]

    C) \[{{100.25}^{o}}C\]

    D) \[{{100.75}^{o}}C\]

    View Answer play_arrow
  • question_answer145) The standard heats of formation of \[N{{O}_{2}}(g)\] and \[{{N}_{2}}{{O}_{4}}(g)\] are \[8.0\] and \[2.0kcal\,\,mol{{e}^{-1}}\]respectively. The heat of dimerisation of \[N{{O}_{2}}\] in kcal is:

    A) \[-14.0\]

    B) \[-12.0\]

    C) \[-6.0\]

    D) \[-10.0\]

    View Answer play_arrow
  • question_answer146) o-chloro toluene on further nitration gives:





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  • question_answer147) EMF of cell, \[Ni|N{{i}^{2+}}(1.0M)||A{{u}^{3+}}(1.0M)|Au\] where \[{{E}^{o}}\] for \[N{{i}^{2+}}|Ni\] is \[-0.25V\]and \[{{E}^{o}}\] for \[A{{u}^{3+}}|Au\]is \[1.50V\]is:

    A) \[-1.75V\]

    B) \[+1.25V\]

    C) \[+\text{ }1.75V\]

    D) \[+4.0V\]

    View Answer play_arrow
  • question_answer148) The reaction of \[C{{H}_{3}}MgI\]with acetone and hydrolysis of the resulting product gives:

    A) \[{{(C{{H}_{3}})}_{3}}COH\]

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

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

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

    View Answer play_arrow
  • question_answer149) If \[C{{H}_{3}}COOH+O{{H}^{-}}\to C{{H}_{3}}CO{{O}^{-}}+{{H}_{2}}O\]\[+{{q}_{1}}\] and \[{{H}^{+}}+O{{H}^{-}}\to {{H}_{2}}O+{{q}_{2}}\] then the enthalpy change for the reaction, \[C{{H}_{3}}COOH\xrightarrow{{}}C{{H}_{3}}CO{{O}^{-}}+{{H}^{+}}\] is equal to:

    A) \[{{q}_{1}}-{{q}_{2}}\]

    B) \[{{q}_{2}}-{{q}_{1}}\]

    C) \[{{q}_{1}}+{{q}_{2}}\]

    D) None of these

    View Answer play_arrow
  • question_answer150) The colour of \[FeS{{O}_{4}}{{(N{{H}_{4}})}_{2}}S{{O}_{4}}.6{{H}_{2}}O\]

    A) Blue

    B) green

    C) White

    D) red

    View Answer play_arrow
  • question_answer151) The transition zone between two different communities is called as :

    A) ecad

    B) ecotype

    C) ecotone

    D) none of these

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  • question_answer152) The pyramid of biomass in a parasitic ecosystem is:

    A) upright

    B) inverted

    C) rhomboidal

    D) linear

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  • question_answer153) A Nobel prize was awarded for proposing the mechanism of ATP formation in the light reaction to :

    A) Mitchell

    B) Salisbury

    C) Bassham

    D) Calvin

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  • question_answer154) The enzyme libase brings about :

    A) condensation of glycerol and fatty acids into fats

    B) hydrolysis of triglycerides

    C) both a and b

    D) conversion of glyoxalate to glycolate

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  • question_answer155) Which will show both alternation of generation and alternation of host ?

    A) Taenia

    B) Ascaris

    C) Fasciola

    D) Cyclostoma

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  • question_answer156) Wuchereria is transmitted by :

    A) Culex

    B) Female Anopheles

    C) Tse-tsefly

    D) phlebotomous

    View Answer play_arrow
  • question_answer157) Lac is :

    A) epidermal secretion of body in insects

    B) excretory product

    C) plant product

    D) a dead rat insect

    View Answer play_arrow
  • question_answer158) Larvae bilateral and adults are radial in :

    A) Arthropoda

    B) Annelida

    C) Echinodermata

    D) Mollusca

    View Answer play_arrow
  • question_answer159) The ratio of xanthophyll to carotene in young leaves in nature is :

    A) 3 : 1

    B) 1 : 3

    C) 1 : 2

    D) 2 : 1

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  • question_answer160) The primitive atmosphere on the earth largely had :

    A) \[C{{H}_{4}}\] and \[N{{H}_{3}}\]

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

    C) \[C{{O}_{2}}\] and He

    D) \[{{H}_{2}}\] and He

    View Answer play_arrow
  • question_answer161) Guayule rubber comes from :

    A) Taraxacum sp

    B) Landophila sp

    C) Funtumia sp

    D) Parthenium sp

    View Answer play_arrow
  • question_answer162) Which of the following plants is generally described as a living fossil ?

    A) Cycas

    B) Cupressus

    C) Taxus

    D) Ephedra

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  • question_answer163) In snakes the poisonous glands are modification of :

    A) parotid glands

    B) mascitters glands

    C) sublingual glands

    D) lingual glands

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  • question_answer164) In snakes eyelids are :

    A) immovable

    B) no eyelids

    C) movable

    D) all of these

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  • question_answer165) Mouth parts of Housefly are of :

    A) sponging and sucking type

    B) piercing type

    C) laping and chewing type.

    D) siphoning type

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  • question_answer166) Entaimoeba histolytica is :

    A) found in intestine

    B) found in liver

    C) found in coelom

    D) all of these

    View Answer play_arrow
  • question_answer167) The base of oxysome is also called as :

    A) \[{{F}_{5}}\] particle

    B) \[{{F}_{6}}\] particle

    C) \[{{F}_{1}}\]particle

    D) \[{{F}_{0}}\]particle

    View Answer play_arrow
  • question_answer168) Temin was awarded Nobel prize in the year :

    A) 1968

    B) 1973

    C) 1975

    D) 1978

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  • question_answer169) Circnotropous ovules are found in :

    A) Butomus

    B) Brassica

    C) Opuntia

    D) Polygonum

    View Answer play_arrow
  • question_answer170) In Potato the bud dormancy is due to :

    A) ABA

    B) inhibor B

    C) ethylene

    D) cyanides

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  • question_answer171) Amphioxus belongs to :

    A) Cephalochordata

    B) Urochordata

    C) Vertebrata

    D) Hemichordata

    View Answer play_arrow
  • question_answer172) Inorganic ions help in blood clotting :

    A) \[M{{g}^{++}}\]

    B) \[C{{a}^{++}}\]

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

    D) \[{{K}^{+}}\]

    View Answer play_arrow
  • question_answer173) Natural selection theory is proposed by Darwin along with :

    A) Wallace

    B) Mendel

    C) Morgan

    D) Lamarck

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  • question_answer174) Biodegradable pollutant is :

    A) sewage

    B) asbestos

    C) plastic

    D) all of these

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  • question_answer175) Which of the following originates from mesoderm ?

    A) Eye ball and retina

    B) Dermis and heart

    C) Intestine

    D) All of these

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  • question_answer176) In Frog the ear has :

    A) pinna

    B) cochlea and pinna

    C) pinna and drum

    D) ear drum and internal ear

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  • question_answer177) Without exception, all birds are :

    A) omnivorous

    B) have feathers and fly

    C) form nests and care them

    D) have calcareous shelled egg

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  • question_answer178) In honey which of the following sugar is present?

    A) Glucose

    B) Glycogen

    C) Sucrose

    D) Cellulose

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  • question_answer179) Phosphate pollution is caused by :

    A) phosphate rock only

    B) agriculture fertilizers only

    C) sewage and phosphate rock

    D) sewage and agriculture fertilizers

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  • question_answer180) Angiosperms, to which the largest flower belongs, is :

    A) total stem parasite

    B) partial stem parasite

    C) total root parasite

    D) partial root parasite

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  • question_answer181) Which of the following is free living aerobic non-photo-synthetic nitrogen-fixing bacterium ?

    A) Rhizobium

    B) Azotobacter

    C) Nostoc

    D) Azospirillum

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  • question_answer182) Which of the following ecosystem has the highest gross primary productivity?

    A) Grassland

    B) Coral reef

    C) Mangroves

    D) Rain forest

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  • question_answer183) Net gain of ATP molecules, during aerobic respiration, is :

    A) 36 molecules

    B) 38 molecules

    C) 40 molecules

    D) 48 molecules

    View Answer play_arrow
  • question_answer184) The antherozoids of Funaria are :

    A) aciliated

    B) biciliated

    C) multiciliated

    D) monociliated

    View Answer play_arrow
  • question_answer185) Which of the following organ has single membrane ?

    A) nucleus

    B) cell wall

    C) nucleolus

    D) none of these

    View Answer play_arrow
  • question_answer186) Centromere is a part of :

    A) ribosomes

    B) mitochondria

    C) chromosomes

    D) endoplasmic reticulum

    View Answer play_arrow
  • question_answer187) \[NADP{{H}_{2}}\]is generated through :

    A) glycolysis

    B) photosystem-I

    C) photosystem-II

    D) anaerobic respiration

    View Answer play_arrow
  • question_answer188) Heterospory, seed habit is often exhibited by a plant possessing :

    A) bract

    B) spathe

    C) petiole

    D) ligule

    View Answer play_arrow
  • question_answer189) Columella is a specialized structure found in the sporangium of :

    A) Ulothrix

    B) Rhizopus

    C) Spirogyra

    D) None of these

    View Answer play_arrow
  • question_answer190) The maximum bio-magnification would be in which of the following case of aquatic ecosystem ?

    A) Fishes

    B) Birds

    C) Zooplanktons

    D) Phytoplanktons

    View Answer play_arrow
  • question_answer191) The codons causing chain termination are :

    A) TAG, TAA, TGA

    B) GAT, AAT, ACT

    C) AGT, TAG, UGA

    D) UAG, UGA, UAA

    View Answer play_arrow
  • question_answer192) Which of the following is the key intermediate compound linking glycolysis to the Krebs cycle ?

    A) NADH

    B) ATP

    C) Malic acid

    D) Acetyl Co-A

    View Answer play_arrow
  • question_answer193) Land mass occupied by forest is about :

    A) 11 %

    B) 22%

    C) 30%

    D) 60%

    View Answer play_arrow
  • question_answer194) In soil, water available for plants is :

    A) capillary water

    B) hygroscopic water

    C) gravitational water

    D) chemically bound water

    View Answer play_arrow
  • question_answer195) The RNA that pick up specific amino acid from amino acid pool in the cytoplasm to ribosome during protein synthesis is called :

    A) m-RNA

    B) t-RNA

    C) r-RNA

    D) RNA

    View Answer play_arrow
  • question_answer196) Which of the following is a living fossil ?

    A) pinns longifolia

    B) Delbergia sissoo

    C) Mirabilis jalapa

    D) Ginkgo biloba

    View Answer play_arrow
  • question_answer197) Edible part in Litchi is :

    A) mesocarp

    B) fleshy aril

    C) endosperm

    D) pericarp

    View Answer play_arrow
  • question_answer198) Initiation codon in eukaryotes is :

    A) AUG

    B) UAG

    C) GAU

    D) AGU

    View Answer play_arrow
  • question_answer199) Gobar gas contains mainly :

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

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

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

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

    View Answer play_arrow
  • question_answer200) With an increase in the turgidity of cell, the wall pressure will :

    A) increase

    B) decrease

    C) fluctuate

    D) remain unchanged

    View Answer play_arrow
  • question_answer201) The aquatic fern, which is an excellent biofertilizer, is :

    A) Azolla

    B) Saluinia

    C) Marsilea

    D) Pteridium

    View Answer play_arrow
  • question_answer202) The joint between atlas and axis is called :

    A) pivot joint

    B) saddle joint

    C) angular joint

    D) hinge joint

    View Answer play_arrow
  • question_answer203) Cholecystokinin and duocrimin are secreted by :

    A) intestine

    B) pancrease

    C) adrenal cortex

    D) thyroid gland

    View Answer play_arrow
  • question_answer204) A person with the sex chromosomes XXY suffer from :

    A) Downs syndrome

    B) Turners syndrome

    C) Gynandromorphism

    D) Klinefelters syndrome

    View Answer play_arrow
  • question_answer205) Genetic identity of a human male is determined by :

    A) autosome

    B) nucleolus

    C) sex-chromosome

    D) cell organelles

    View Answer play_arrow
  • question_answer206) Which of the following is pollution related disorder ?

    A) Flurosis

    B) Leprosis

    C) Silicosis

    D) Pneumonicosis

    View Answer play_arrow
  • question_answer207) To which of the following family do folk acid and pentothenic acid belong?

    A) Vitamin K

    B) Vitamin A

    C) Vitamin C

    D) Vitamin B complex

    View Answer play_arrow
  • question_answer208) Rate of heartbeat is determined by :

    A) AV node

    B) SA node

    C) Purkinje fibres

    D) papillary muscles

    View Answer play_arrow
  • question_answer209) Which of the following are homologous organs?

    A) Wings of bird and wings of insect

    B) Wings of bat and wings of Cockroach

    C) Wings of bird and hand of human

    D) Nails of human being and calws in animals

    View Answer play_arrow
  • question_answer210) The problem, due to Rh‑ factor arises when the blood of two ( Rh+ and Rh-) mix up :

    A) in test tube

    B) through transfusion

    C) during pregnancy

    D) both a and c

    View Answer play_arrow
  • question_answer211) DDT is :

    A) a non-degradable pollutant

    B) a biodegradable pollutant

    C) not a pollutant

    D) an antibiotic

    View Answer play_arrow
  • question_answer212) In human beings, multiple genes are involved in the inheritance of :

    A) colour blindness

    B) phenylketonuria

    C) sickle cell anaemia

    D) skin colour

    View Answer play_arrow
  • question_answer213) What is common among Silver fish, Scorpion, Crab and Honey bee?

    A) Compound eyes

    B) Poison glands

    C) Jointed legs

    D) Metamorphosis

    View Answer play_arrow
  • question_answer214) Plague (black death) is caused by :

    A) bacteria

    B) virus

    C) protozoan

    D) fungi

    View Answer play_arrow
  • question_answer215) Viruses possess :

    A) organelle for its vital mechanism

    B) either DNA or RNA

    C) ribosomes to synthesize protein

    D) none of these

    View Answer play_arrow
  • question_answer216) The roof of cranium of Frog is formed by :

    A) parasphenoid

    B) alisphenoid

    C) frontoparietal

    D) orbitosphenoid

    View Answer play_arrow
  • question_answer217) The embryonated egg of Ascciris represents :

    A) an egg with an egg

    B) an egg with gastrula

    C) an egg with blastula

    D) an egg with a juvenile

    View Answer play_arrow
  • question_answer218) Diabetes is due to :

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

    B) hormonal deficiency

    C) enzyme deficiency

    D) iodine deficiency

    View Answer play_arrow
  • question_answer219) The 10% energy transfer law of food chain was given by :

    A) Stanley

    B) Weismann

    C) Lindemann

    D) Tansley

    View Answer play_arrow
  • question_answer220) Which of the following plant kingdom is called amphibians?

    A) Tracheophyta

    B) Bryophyta

    C) Pteridophyta

    D) Thallophyta

    View Answer play_arrow
  • question_answer221) The rate at which light energy is converted into chemical energy of organic molecules is the ecosystems ?

    A) Net primary productivity

    B) Gross secondary productivity

    C) Net secondary productivity

    D) Gross primary productivity

    View Answer play_arrow
  • question_answer222) Typhoid fever is caused by:

    A) Giardia

    B) Salmonella

    C) Shigella

    D) Escherichia

    View Answer play_arrow
  • question_answer223) A bacterium divides every 35 minutes. If a culture containing 10 cell per ml is grown for 175 minutes, what will be the cell concentration per ml after 175 minutes?

    A) \[175\times {{10}^{5}}\] cells

    B) \[85\times {{10}^{5}}\] cells

    C) \[53\times {{10}^{5}}\] cells

    D) \[32\times {{10}^{5}}\] cells

    View Answer play_arrow
  • question_answer224) Taxon is the unit of a group of :

    A) species

    B) genus

    C) order

    D) taxonomy

    View Answer play_arrow
  • question_answer225) When water enters in roots due to diffusion, is termed as :

    A) endocytosis

    B) active absorption

    C) osmosis

    D) passive absorption

    View Answer play_arrow
  • question_answer226) 2, 4-D is an effective :

    A) fungicide

    B) weedicide

    C) rodenticide

    D) wormicide

    View Answer play_arrow
  • question_answer227) The term meiosis was given by :

    A) Johansson

    B) Knoll and Ruska

    C) Flemming

    D) Farmer and Moore

    View Answer play_arrow
  • question_answer228) Puccinia forms uredia and :

    A) pycnia on Barberry leaves

    B) aecia on Wheat leaves

    C) telia on Wheat leaves

    D) aecia on Barberry leaves

    View Answer play_arrow
  • question_answer229) Two bacteria found to be very useful in genetic engineering experiments are :

    A) Nitrosomonas and Kliebsiella

    B) Escherichia and Agrobacterium

    C) Nitrobacter .and Azotobacter

    D) Rhizobium and Diplococcus

    View Answer play_arrow
  • question_answer230) Which of the following meristems is responsible for extrastelar secondary growth in dicotyledonous stem ?

    A) Phellogen

    B) Intrafascicular cambium

    C) Interfascicular cambium

    D) Intercalary meristem

    View Answer play_arrow
  • question_answer231) The periderm includes :

    A) cork

    B) cambium

    C) secondary phloem

    D) all of these

    View Answer play_arrow
  • question_answer232) Genetic drift operates only in :

    A) island populations

    B) smaller populations

    C) larger populations

    D) Mendelian populations

    View Answer play_arrow
  • question_answer233) Which one of the following statement is correct?

    A) Homo erectus is the ancestor of man

    B) Cro-magnon mans fossil has been found in Ethiopia

    C) Australopitheciis is the real ancestor of modern man

    D) Neanderthal man is the direct ancestor of Homo sapiens

    View Answer play_arrow
  • question_answer234) When a single gene influences more than one trait it is called :

    A) pleiotrophy

    B) epistasis

    C) pseudo-dominance

    D) none of these

    View Answer play_arrow
  • question_answer235) The exchanges of gases in the alveoli of the lungs takes place by :

    A) osmosis

    B) simple diffusion

    C) passive transport

    D) active transport

    View Answer play_arrow
  • question_answer236) Phytochrome becomes active in :

    A) green light

    B) blue light

    C) red light

    D) none of these

    View Answer play_arrow
  • question_answer237) Which one among the following chemicals is used for causing defoliation of forest trees ?

    A) amo-1618

    B) phosphon-D

    C) malic hydrazide

    D) 2, 4-D

    View Answer play_arrow
  • question_answer238) Two opposite forces operate in the growth and development of every population. One of them related to the ability to reproduce at a given rate. The force opposing to it is called :

    A) biotic control

    B) mortality

    C) fecundity

    D) environmental resistances

    View Answer play_arrow
  • question_answer239) Colchicine is an inhibitory chemical, which:

    A) prevents the spindle formation in mitosis

    B) prevents the formation of equatorial plane

    C) stops the functioning of centriole

    D) prevents attaching of centromeres with rays

    View Answer play_arrow
  • question_answer240) The polygenic genes show :

    A) different genotypes

    B) different phenotypes

    C) different karyotypes

    D) none of these

    View Answer play_arrow
  • question_answer241) Maximum absorption of light occurs in the region of :

    A) 400 - 700 nm

    B) 700 - 900 nm

    C) 1000 - 1200 nm

    D) 1500 - 2000 nm

    View Answer play_arrow
  • question_answer242) Which one of the following fish is introduced in India by foreigners ?

    A) Labeo rohita

    B) Pomphret

    C) Mystus singhala

    D) Calsius batrachus

    View Answer play_arrow
  • question_answer243) What is the major cause of diminishing wild life number ?

    A) Cannibalism

    B) Habitat destruction

    C) Falling of trees

    D) Paucity of drinking water

    View Answer play_arrow
  • question_answer244) Lactose is composed of :

    A) glucose + fructose

    B) glucose + glucose

    C) glucose + galactose

    D) fructose+ galactose

    View Answer play_arrow
  • question_answer245) H.J. Muller had received Nobel prize for :

    A) discovering the linkage of genes

    B) discovering the induced mutations by X-rays

    C) his studies on Drosophila for genetic study

    D) proving that the DNA is a genetic material

    View Answer play_arrow
  • question_answer246) Pasteurisation is a process, which means heating of drinks. It is carried out, at what temperature and for how much duration?

    A) \[120{}^\circ C\text{ }and\text{ }60\text{ }minutes\]

    B) \[60-70{}^\circ C\text{ }and\text{ }30\text{ }minutes\]

    C) \[70{}^\circ C\text{ }and\text{ }60\text{ }minutes\]

    D) \[80{}^\circ C\text{ }and\text{ }30\text{ }minutes\]

    View Answer play_arrow
  • question_answer247) Which hormones stimulates the secretion of milk from female?

    A) LH

    B) Prolactin

    C) Oxytocin

    D) Progesterone

    View Answer play_arrow
  • question_answer248) Coelom is found between the cavity of :

    A) ectoderm and endoderm

    B) mesoderm and ectoderm

    C) endoderm and ectoderm

    D) mesoderm and endoderm

    View Answer play_arrow
  • question_answer249) When 1500 ml air is present in the lungs, it is called :

    A) vital capacity

    B) tidal volume

    C) residua volume

    D) inspiratory reserve volume

    View Answer play_arrow
  • question_answer250) AIDS disease was first reported in :

    A) Russia

    B) Germany

    C) USA

    D) France

    View Answer play_arrow
  • question_answer251) In \[{{C}_{4}}\] plants, \[C{{O}_{2}}\] fixation is done by :

    A) mesophyll cells

    B) guard cells

    C) sclerenchyma

    D) chlorenchyma and hypodermis

    View Answer play_arrow
  • question_answer252) The prokaryotic flagella possess :

    A) unit membrane enclosed fibre

    B) protein membrane enclosed fibre

    C) helically arranged protein molecule

    D) 9 + 1 membrane enclosed structure

    View Answer play_arrow
  • question_answer253) The black rust of Wheat is a fungal disease caused by :

    A) Melanipsora lini

    B) Clauiceps purpurea

    C) Albugo Candida

    D) Puccinia graminis tritici

    View Answer play_arrow
  • question_answer254) Two zoogeographical regions, separated by high mountain ranges, are :

    A) oriental and Australian

    B) palaearctic and oriental

    C) nearctic and palaearctic

    D) neotropical and Ethiopian

    View Answer play_arrow
  • question_answer255) The twinning of tendrils around a support is a good example of :

    A) nastic movements

    B) thigmotropism

    C) phototropism

    D) chemotropism

    View Answer play_arrow
  • question_answer256) When a cell is fully turgid which of the following will be zero ?

    A) Wall pressure

    B) Osmotic pressure

    C) Turgor pressure

    D) Water potential

    View Answer play_arrow
  • question_answer257) DNA synthesis can be specifically measured by estimating the incorporation of radio-labeled :

    A) uracil

    B) adenine

    C) thymidine

    D) deoxyribose sugar

    View Answer play_arrow
  • question_answer258) How many mitotic divisions are needed for a single cell to make 128 cells ?

    A) 7

    B) 14

    C) 28

    D) 32

    View Answer play_arrow
  • question_answer259) Co-factor (prosthetic group) is a part of holoenzyme. It is :

    A) loosely attached inorganic part

    B) accessory non-protein substance attached firmly

    C) loosely attached organic part

    D) none of these

    View Answer play_arrow
  • question_answer260) Bryophytes can be separated from algae, because they :

    A) are thalloid forms

    B) have no conducting tissue

    C) possess archegonia

    D) contain chloroplast

    View Answer play_arrow
  • question_answer261) The core metal of chlorophyll is :

    A) Fe

    B) Mg

    C) Ni

    D) Cu

    View Answer play_arrow
  • question_answer262) Which of the following symptoms indicate red-sickness?

    A) Red and luncerated skin

    B) Nausea and anaemia

    C) Nausea and loss of hair

    D) Uncerated skin, nausea and loss of hair

    View Answer play_arrow
  • question_answer263) The end product of fermentation are :

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

    B) \[C{{O}_{2}}\] and \[{{C}_{2}}{{H}_{5}}OH\]

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

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

    View Answer play_arrow
  • question_answer264) The desmosomes are concerned with :

    A) cytolysis

    B) cellular excretion

    C) cell division

    D) cell adherence

    View Answer play_arrow
  • question_answer265) The lymph serves to :

    A) transport \[C{{O}_{2}}\] to the lungs

    B) transport \[{{O}_{2}}\]to the brain

    C) return the interstitial fluid to the blood

    D) return the WBCs and. RBCs to the lymph nodes

    View Answer play_arrow
  • question_answer266) The carbon dioxide is transported via blood to lungs mostly :

    A) in the form of carbonic acid only

    B) as carbaminohaemoglobin and as carbonic acid

    C) in combination with haemoglobin only

    D) dissolved in blood plasma

    View Answer play_arrow
  • question_answer267) Which one of the following pairs is correctly matched ?

    A) Excessive perspiration-xeric adaptation

    B) Streamlined body-aquatic adaptation

    C) Parasitism-intra-specific relationship

    D) Uricotelism-aquatic habitat

    View Answer play_arrow
  • question_answer268) Which one of the following isotopes is most dangerous to Homo sapiens ?

    A) Caesium - 137

    B) Iodine - 131

    C) Phosphorus - 32

    D) Strontium - 90

    View Answer play_arrow
  • question_answer269) Identify the correct match between Tiger reserve and its state :

    A) Bandipur - Tamil Nadu

    B) Palau- Orissa

    C) Manas - Assam

    D) Corbett - Madhya Pradesh

    View Answer play_arrow
  • question_answer270) In abiotic community, the primary consumers are :

    A) carnivores

    B) omnivores

    C) detritivores

    D) herbivores

    View Answer play_arrow
  • question_answer271) Barr body in mammals represents :

    A) all the heterochromatin in female cells

    B) one of the two X - chromosomes in somatic cells of females

    C) all the heterochromatin in male and female cells

    D) the Y - chromosome in somatic cells of male

    View Answer play_arrow
  • question_answer272) An environment agent, which triggers transcription from an operon, is a :

    A) regulator

    B) inducer

    C) depressor

    D) controlling element

    View Answer play_arrow
  • question_answer273) The concept that population tends to increase geometrically while food supply increases arithmetically was put forward by :

    A) Stuart Mill

    B) Adam Smith

    C) Thomas Malthus

    D) Charles Darwin

    View Answer play_arrow
  • question_answer274) The blood cancer is known as :

    A) leukaemia

    B) thrombosis

    C) haemolysis

    D) haemophilia

    View Answer play_arrow
  • question_answer275) How many chromosomes are present in ovum of man ?

    A) 22 + X

    B) 22 + Y -

    C) 44 + X

    D) 44 + Y

    View Answer play_arrow
  • question_answer276) Stratum germinativum is an example of which kind of epithelium ?

    A) Cuboidal

    B) Ciliated

    C) Columnar

    D) Squamous

    View Answer play_arrow
  • question_answer277) If pancreas is removed, the compund which remain undigested is :

    A) carbohydrates

    B) fats

    C) proteins

    D) all of these

    View Answer play_arrow
  • question_answer278) The life span of human WBC is approximately :

    A) less than 10 days

    B) between 20 to 30 days

    C) between 2 to 3 months

    D) more than 4 months

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  • question_answer279) T. Schwann and M Schleiden were :

    A) Dutch biologists

    B) Austrian biologists

    C) German biologists

    D) English biologists

    View Answer play_arrow
  • question_answer280) Lysosomes are the store house of :

    A) hydrolytic enzymes

    B) proteins

    C) sugar

    D) ATP

    View Answer play_arrow
  • question_answer281) Which of the following is responsible for the mechanical support, protein synthesis and enzyme transport ?

    A) Endoplasmic reticulum

    B) Mitochondria

    C) Cell membrane

    D) Dictyosome

    View Answer play_arrow
  • question_answer282) The kingdoms-Monera, Protista, Fungi, Plantae and Animalia are distinguished on the basis of :

    A) type of nutrition

    B) type of cell

    C) type of reproduction

    D) all of these

    View Answer play_arrow
  • question_answer283) The protists have :

    A) membrane bound nucleoproteins lying embedded in the cytoplasm

    B) gene containing nuclepproteins condensed together in loss mass

    C) nucleoproteins in direct contact with the rest of the cell substance

    D) only free nucleic acid aggregates

    View Answer play_arrow
  • question_answer284) Which of the following is obtained from algae ?

    A) Carragenin

    B) Chocolate

    C) Butter

    D) Wax

    View Answer play_arrow
  • question_answer285) Which of the following plant kingdom is called Amphibians ?

    A) Thallophyta

    B) Pteridophyta

    C) Tracheophyta

    D) Bryophyta

    View Answer play_arrow
  • question_answer286) Enzymes are not found in :

    A) cyanobacteria

    B) viruses

    C) algae

    D) fungi

    View Answer play_arrow
  • question_answer287) For formation of one glucose molecule, a Calvin cycle circulates :

    A) 8 times

    B) 6 times

    C) 4 times

    D) 2 times

    View Answer play_arrow
  • question_answer288) Which of the following is grouped under phanerogams ?

    A) Pteridophyta

    B) Angiosperms

    C) Gymnosperms

    D) both b and c

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  • question_answer289) Iponmoea batata belongs to family :

    A) Ranunculaceae

    B) Rutaceae

    C) Gramineae

    D) None of these

    View Answer play_arrow
  • question_answer290) Buttress roots are found in :

    A) Pandanus

    B) Terminalia

    C) Banyan

    D) Sorghum

    View Answer play_arrow
  • question_answer291) Which of the following causes white rust of crucifers ?

    A) Aspergillus

    B) Puccinia

    C) Mucor

    D) Albugo

    View Answer play_arrow
  • question_answer292) Treeless terrestrial biome of cold climates is :

    A) plankton

    B) tundra

    C) savanaha

    D) taiga

    View Answer play_arrow
  • question_answer293) Rhododendron is the characteristic vegetation of :

    A) mangrove belt

    B) gangetic plains

    C) alpine zone

    D) tropical zone

    View Answer play_arrow
  • question_answer294) The pyramid of energy is always :

    A) inverted

    B) horizontal

    C) both a and b

    D) upright

    View Answer play_arrow
  • question_answer295) Loss of relative biological equilibrium is due to :

    A) low temperature

    B) high temperature

    C) radiation

    D) pollution

    View Answer play_arrow
  • question_answer296) The healing of wounds in plants takes place by the activity of :

    A) intercalary meristem

    B) secondary meristem

    C) lateral meristem

    D) apical meristem

    View Answer play_arrow
  • question_answer297) In which of the following form, sugar is transported within the body of plant?

    A) Maltose

    B) Glucose

    C) Lactose

    D) Sucrose

    View Answer play_arrow
  • question_answer298) In angiosperm, endosperm is formed by :

    A) division of fused synergids and male gamete

    B) division of fused polar nuclei

    C) division of fused polar nuclei and male gamete

    D) free nuclear divisions of megaspore

    View Answer play_arrow
  • question_answer299) Increase in the carbon-dioxide concentration of micro environment of leaf will cause :

    A) wider opening of stomata

    B) no effect on stomata

    C) opening of stomata

    D) closure of stomata

    View Answer play_arrow
  • question_answer300) The first reaction in photorespiration is :

    A) phosphorylation

    B) decarboxylation

    C) oxygenation

    D) carboxylation

    View Answer play_arrow



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