# 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) $HCl$

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

A) $Na$

B) $Li$

C) $K$

D) $Cs$

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• question_answer84) Oxidation number of N in $HN{{O}_{3}}$ is:

A) $+3.5$

B) $-3.5$

C) $+5$

D) $-5$

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• 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

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• 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

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

A) Associate

B) Dissociate

C) Decompose

D) Become completely soluble

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• question_answer88) Aniline is usually purified by:

A) Chromatographic

B) Fractional crystallization

C) By adding oxalic acid

D) Steam distillation

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

A) Ionic

B) dipole

C) Covalent

D) metallic

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• 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) $\frac{(y-2x)}{2}$

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• 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

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• 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

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• 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) $+5$

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• 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

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• question_answer95) Hydrogen peroxide is reduced by:

A) Ozone

B) Barium peroxide

C) Acidic solution of $~KMn{{O}_{4}}$

D) Lead sulphide suspension

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• 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

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• 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

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• 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) ${{N}_{2}}{{O}_{5}}$

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• 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) $1.7\text{ }g\text{ }litr{{e}^{-1}}$

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• 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

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• 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) $I$

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• question_answer104) Oppenauer oxidation is the reverse process of:

A) Merwein Pondrof verley reduction

B) Clemmensens reduction

C) Rosemund reduction

D) Wolf Kishner reduction

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

A) Bayers process

B) Halls process

C) Serpecks process

D) Hoopes process

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• 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) $\frac{6.02\times {{10}^{23}}}{4}$

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• question_answer107) Bell metal is an alloy of:

A) $Cu+Ni$

B) $Cu+Pb$

C) $Cu+Sn$

D) $Cu+Zn$

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• 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

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• 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

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• question_answer110) Natural rubber is a polymer of:

A) cis-isoprene

B) trans isoprene

C) Cis and trans isoprene

D) None of these above

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• question_answer111) Cassiterite is an ore of:

A) $Sn$

B) $Ni$

C) $Sb$

D) $Mn$

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• 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

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• 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) $C{{H}_{2}}COOH$

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• question_answer115) Percentage of lead in lead pencil is:

A) $30$

B) $20$

C) $10$

D) $0$

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

A) $Na$

B) $Fe$

C) $Zn$

D) $Mg$

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• 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) ${{C}_{6}}{{H}_{5}}C{{H}_{3}}$

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• 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) $171.2$

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

A) Salicylic acid

B) Phthallic acid

C) Terephthalic acid

D) benzoic acid

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• question_answer120) Electric refining is used for refining of:

A) $Fe$

B) $Cu$

C) $Pb$

D) None of these

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• 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) ${{O}_{2}}>{{O}_{3}}>{{H}_{2}}{{O}_{2}}$

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• question_answer122) Silver metal is obtained by:

A) Magnetic separation

B) Carbon reduction process

C) Froth floatation process

D) Parkes process

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

A) Weight volume per cent

B) Normality

C) Molality

D) Molarity

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• 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) $160\text{ }min$

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• question_answer125) Oxidation state of $Fe$ in $F{{e}_{2}}{{O}_{4}}$is:

A) $8/3$

B) $3/2$

C) $5/4$

D) $4/5$

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• 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

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

A) Sommer field

B) Rutherford

C) Hund

D) Thomson

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• 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) $27\text{ }times$

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

A) $C{{u}^{+}}$

B) ${{N}^{3+}}$

C) $Z{{n}^{+}}$

D) $F{{e}^{2+}}$

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• 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

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• question_answer131) The pH of blood is:

A) $<7$

B) $>10$

C) $>8$ but $<9$

D) $>7$ but $<8$

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• 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) $B{{(OH)}_{4}}^{-}$

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• 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

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• 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) $1040\text{ }kcal$

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• 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

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• 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

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• 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) ${{O}_{2}}>{{O}_{2}}^{-}>{{O}_{2}}^{+}$

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• question_answer138) Coal gas is a mixture of:

A) $C{{H}_{4}}+CO$

B) ${{H}_{2}}O+CO$

C) ${{H}_{2}}+CO$

D) ${{H}_{2}}+CO+C{{H}_{4}}$

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• 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

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• 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) $2$

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• 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) $Li,Be,B,C$

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• question_answer142) The structure of $CsCl$is:

A) Octahedral lattice

B) Face centred cubic lattice

C) Body centred cubic lattice

D) None of these

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

A) Mass volume percent

B) Normality

C) Molarity

D) Molality

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• 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) ${{100.75}^{o}}C$

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• 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) $-10.0$

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

A)

B)

C)

D)

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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) $+4.0V$

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• 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) $C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH$

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• 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

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• 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

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• 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

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• question_answer157) Lac is :

A) epidermal secretion of body in insects

B) excretory product

C) plant product

D) a dead rat insect

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• question_answer158) Larvae bilateral and adults are radial in :

A) Arthropoda

B) Annelida

C) Echinodermata

D) Mollusca

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• 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

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• question_answer161) Guayule rubber comes from :

A) Taraxacum sp

B) Landophila sp

C) Funtumia sp

D) Parthenium sp

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• 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

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• 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

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• 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

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• 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

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• question_answer172) Inorganic ions help in blood clotting :

A) $M{{g}^{++}}$

B) $C{{a}^{++}}$

C) $N{{a}^{+}}$

D) ${{K}^{+}}$

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• 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

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• question_answer184) The antherozoids of Funaria are :

A) aciliated

B) biciliated

C) multiciliated

D) monociliated

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

A) nucleus

B) cell wall

C) nucleolus

D) none of these

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• question_answer186) Centromere is a part of :

A) ribosomes

B) mitochondria

C) chromosomes

D) endoplasmic reticulum

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• question_answer187) $NADP{{H}_{2}}$is generated through :

A) glycolysis

B) photosystem-I

C) photosystem-II

D) anaerobic respiration

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

A) bract

B) spathe

C) petiole

D) ligule

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

A) Ulothrix

B) Rhizopus

C) Spirogyra

D) None of these

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• 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

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• question_answer191) The codons causing chain termination are :

A) TAG, TAA, TGA

B) GAT, AAT, ACT

C) AGT, TAG, UGA

D) UAG, UGA, UAA

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• 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

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• question_answer193) Land mass occupied by forest is about :

A) 11 %

B) 22%

C) 30%

D) 60%

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

A) capillary water

B) hygroscopic water

C) gravitational water

D) chemically bound water

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• 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

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

A) pinns longifolia

B) Delbergia sissoo

C) Mirabilis jalapa

D) Ginkgo biloba

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• question_answer197) Edible part in Litchi is :

A) mesocarp

B) fleshy aril

C) endosperm

D) pericarp

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• question_answer198) Initiation codon in eukaryotes is :

A) AUG

B) UAG

C) GAU

D) AGU

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• 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) $C{{O}_{2}}+\text{ }{{H}_{2}}O$

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

A) increase

B) decrease

C) fluctuate

D) remain unchanged

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

A) Azolla

B) Saluinia

C) Marsilea

D) Pteridium

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

A) pivot joint

B) saddle joint

C) angular joint

D) hinge joint

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• question_answer203) Cholecystokinin and duocrimin are secreted by :

A) intestine

B) pancrease

C) adrenal cortex

D) thyroid gland

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

A) Downs syndrome

B) Turners syndrome

C) Gynandromorphism

D) Klinefelters syndrome

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

A) autosome

B) nucleolus

C) sex-chromosome

D) cell organelles

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

A) Flurosis

B) Leprosis

C) Silicosis

D) Pneumonicosis

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• 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

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• question_answer208) Rate of heartbeat is determined by :

A) AV node

B) SA node

C) Purkinje fibres

D) papillary muscles

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• 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

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• 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

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• question_answer211) DDT is :

A) a non-degradable pollutant

B) a biodegradable pollutant

C) not a pollutant

D) an antibiotic

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• 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

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

A) Compound eyes

B) Poison glands

C) Jointed legs

D) Metamorphosis

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• question_answer214) Plague (black death) is caused by :

A) bacteria

B) virus

C) protozoan

D) fungi

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• question_answer215) Viruses possess :

A) organelle for its vital mechanism

B) either DNA or RNA

C) ribosomes to synthesize protein

D) none of these

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

A) parasphenoid

B) alisphenoid

C) frontoparietal

D) orbitosphenoid

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• 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

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• question_answer218) Diabetes is due to :

A) $N{{a}^{+}}$ deficiency

B) hormonal deficiency

C) enzyme deficiency

D) iodine deficiency

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

A) Stanley

B) Weismann

C) Lindemann

D) Tansley

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

A) Tracheophyta

B) Bryophyta

C) Pteridophyta

D) Thallophyta

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• 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

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• question_answer222) Typhoid fever is caused by:

A) Giardia

B) Salmonella

C) Shigella

D) Escherichia

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• 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

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• question_answer224) Taxon is the unit of a group of :

A) species

B) genus

C) order

D) taxonomy

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

A) endocytosis

B) active absorption

C) osmosis

D) passive absorption

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

A) fungicide

B) weedicide

C) rodenticide

D) wormicide

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• question_answer227) The term meiosis was given by :

A) Johansson

B) Knoll and Ruska

C) Flemming

D) Farmer and Moore

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• 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

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• 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

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• 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

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• question_answer231) The periderm includes :

A) cork

B) cambium

C) secondary phloem

D) all of these

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• question_answer232) Genetic drift operates only in :

A) island populations

B) smaller populations

C) larger populations

D) Mendelian populations

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• 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

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• 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

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• 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

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• question_answer236) Phytochrome becomes active in :

A) green light

B) blue light

C) red light

D) none of these

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• 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

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• 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

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• 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

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• question_answer240) The polygenic genes show :

A) different genotypes

B) different phenotypes

C) different karyotypes

D) none of these

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• 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

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• 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

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• 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

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• question_answer244) Lactose is composed of :

A) glucose + fructose

B) glucose + glucose

C) glucose + galactose

D) fructose+ galactose

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• 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

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• 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) $80{}^\circ C\text{ }and\text{ }30\text{ }minutes$

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

A) LH

B) Prolactin

C) Oxytocin

D) Progesterone

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• 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

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• 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

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• question_answer250) AIDS disease was first reported in :

A) Russia

B) Germany

C) USA

D) France

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• 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

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• 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

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• 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

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• 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

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

A) nastic movements

B) thigmotropism

C) phototropism

D) chemotropism

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• 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

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

A) uracil

B) adenine

C) thymidine

D) deoxyribose sugar

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

A) 7

B) 14

C) 28

D) 32

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• 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

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• 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

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• question_answer261) The core metal of chlorophyll is :

A) Fe

B) Mg

C) Ni

D) Cu

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• 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

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• 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

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• question_answer264) The desmosomes are concerned with :

A) cytolysis

B) cellular excretion

C) cell division

D) cell adherence

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• 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

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• 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

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• 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

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• 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

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• 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

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

A) carnivores

B) omnivores

C) detritivores

D) herbivores

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• 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

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

A) regulator

B) inducer

C) depressor

D) controlling element

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• 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

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• question_answer274) The blood cancer is known as :

A) leukaemia

B) thrombosis

C) haemolysis

D) haemophilia

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

A) 22 + X

B) 22 + Y -

C) 44 + X

D) 44 + Y

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

A) Cuboidal

B) Ciliated

C) Columnar

D) Squamous

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

A) carbohydrates

B) fats

C) proteins

D) all of these

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• 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

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• question_answer280) Lysosomes are the store house of :

A) hydrolytic enzymes

B) proteins

C) sugar

D) ATP

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• 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

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• 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

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• 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

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

A) Carragenin

B) Chocolate

C) Butter

D) Wax

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

A) Thallophyta

B) Pteridophyta

C) Tracheophyta

D) Bryophyta

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• question_answer286) Enzymes are not found in :

A) cyanobacteria

B) viruses

C) algae

D) fungi

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

A) 8 times

B) 6 times

C) 4 times

D) 2 times

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• 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

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• question_answer290) Buttress roots are found in :

A) Pandanus

B) Terminalia

C) Banyan

D) Sorghum

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

A) Aspergillus

B) Puccinia

C) Mucor

D) Albugo

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• question_answer292) Treeless terrestrial biome of cold climates is :

A) plankton

B) tundra

C) savanaha

D) taiga

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• question_answer293) Rhododendron is the characteristic vegetation of :

A) mangrove belt

B) gangetic plains

C) alpine zone

D) tropical zone

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• question_answer294) The pyramid of energy is always :

A) inverted

B) horizontal

C) both a and b

D) upright

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

A) low temperature

B) high temperature

C) radiation

D) pollution

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• 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

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

A) Maltose

B) Glucose

C) Lactose

D) Sucrose

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• 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

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• 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

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• question_answer300) The first reaction in photorespiration is :

A) phosphorylation

B) decarboxylation

C) oxygenation

D) carboxylation

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