# Solved papers for Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2005

### done Chhattisgarh PMT Solved Paper-2005

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

A) LC

B) ${{(LC)}^{-1/2}}$

C) ${{(L/C)}^{-1/2}}$

D) $\text{C/L}$

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

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

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

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

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

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

A) 1m/s

B) 10m/s

C) 5 m/s

D) 2 m/s

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

A) directly towards the target

B) 5 cm above the target

C) 10 cm above the target

D) 15 cm above the target

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

A) $90{}^\circ$

B) $0{}^\circ$

C) $180{}^\circ$

D) $30{}^\circ$

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

A) F

B) $\frac{l}{L}F$

C) $\frac{L}{l}F$

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

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

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

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

C) backwards on both the wheel

D) forwards on both the wheels

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

A) 50%

B) 100%

C) 125%

D) 150%

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

A) On compressing a spring

B) On stretching a spring

C) On moving a body against gravitational force

D) On the rising of an air bubble in water

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

A) ${{t}^{1/2}}$

B) ${{t}^{3/4}}$

C) ${{t}^{3/2}}$

D) ${{t}^{2}}$

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

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

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

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

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

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

A) four times

B) double

C) half

D) unchanged

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

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

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

C) when the wire is horizontal

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

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

A) 3/2 g

B) g/3

C) 2/3 g

D) g

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

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

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

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

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

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

A) 4.8 h

B) 48$\sqrt{2}$ h

C) 48 h

D) 24 h

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

A) 2:$\sqrt{2}$

B) $\sqrt{2}$:2

C) 1:1

D) 1 : 2

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

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

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

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

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

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

A) $\frac{3T}{RJ}$

B) $\frac{3T}{rJ}$

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

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

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

A) $80{}^\circ C$

B) $444{}^\circ C$

C) $333{}^\circ C$

D) $171{}^\circ C$

• question_answer21) The specific heat of a gas

A) has only two values ${{C}_{P}}$ and ${{C}_{V}}$

B) has a unique value at a given temperature

C) can have any value between 0 and $\infty$

D) depends upon the mass of the gas

• question_answer22) The pressure of a gas is equal to

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

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

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

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

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

A) zero

B) - 100 J

C) 200 J

D) 100 J

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

A) greater than the final pressure of B

B) equal to the final pressure of B

C) less than the final pressure of B

D) twice the final pressure of B

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

A) $a\text{/4}$

B) $a\text{/3}$

C) $a\text{/2}$

D) $2a\text{/3}$

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

A) $6{}^\circ C$

B) $12{}^\circ C$

C) $18{}^\circ C$

D) $24{}^\circ C$

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

A) 727:327

B) 5 : 3

C) 25 : 9

D) 625 : 81

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

A) greater than T minutes

B) equal to T minutes

C) less than T minutes

D) equal to T/2 minutes

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

A) 200, 400

B) 205,410

C) 195, 390

D) 100, 200

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

A) 109 vib/s

B) 132 vib/s

C) 140 vib/s

D) 248 vib/s

• question_answer31) Young's experiment establishes the fact that

A) light consists of particles

B) light consists of waves

C) light consists of neither particles nor waves

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

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

A) decrease in frequency

B) increase in frequency

C) decrease in intensity

D) increase in intensity

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

A) ${{x}_{1}}{{x}_{2}}$

B) $\sqrt{{{x}_{1}}{{x}_{2}}}$

C) $\sqrt{{{x}_{1}}/{{x}_{2}}}$

D) $\frac{{{x}_{1}}+{{x}_{2}}}{2}$

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

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

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

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

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

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

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

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

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

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

• question_answer36) Fraunhofer lines are an example of

A) continuous spectrum

B) band spectrum

C) emission spectrum

D) absorption spectrum

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

A) diffraction of light

B) dispersion of light

C) scattering of light

D) total internal reflection of light

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

A) convex, 9 cm

B) convex, 9 cm

C) convex, 25 cm

D) convex, 25 cm

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

A) 0.1 degree

B) 0.2 degree

C) 0.3 degree

D) 0.4 degree

A) $1'$

B) $1''$

C) $1{}^\circ$

D) $\frac{1}{60}''$

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

A) housefly will be seen enlarged in image

B) housefly will be seen reduced in image

C) intensity of image will be decreased

D) intensity of image will be increased

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

A) 4.5cm

B) 3.0cm

C) 0.75cm

D) 0.5cm

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

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

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

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

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

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

A) chemical to electrical

B) magnetic to electrical

C) optical to electrical

D) mechanical to electrical

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

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

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

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

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

• question_answer46) The rest energy of an electron is 0.511 MeV The electron is accelerated from rest to a velocity 0.5 c. The change in its energy will be

A) 0.026 MeV

B) 0.051 MeV

C) 0.079 MeV

D) 0.105 MeV

• question_answer47) X-rays from X-ray tube

A) will be monochromatic

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

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

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

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

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

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

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

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

• question_answer49) At zero kelvin a piece of germanium

A) becomes semiconductor

B) becomes good conductor

D) has maximum conductivity

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

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

B) the material obtained will be p-type germanium

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

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

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

A)  will decrease

B)  will increase

C)  will first decrease and then increase

D)  will not change

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

A) $6.53\times {{10}^{-}}\text{A}$

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

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

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

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

A) $1\,\,\overset{\text{o}}{\mathop{\text{A}}}\,$

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

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

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

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

A) from n = 2 to n = 1

B) from n = 3 to n = 1

C) from n = 4 to n = 2

D) from n = 3 to n = 2

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

A) $\text{ }\!\!\pi\!\!\text{ /h}$

B) $\text{h/ }\!\!\pi\!\!\text{ }$

C) $\text{h/2 }\!\!\pi\!\!\text{ }$

D) $\text{2 }\!\!\pi\!\!\text{ /h}$

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

A) Proton

B) Neutron

C) Electron

D) Photon

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

A) 1

B) 3/4

C) 7/8

D) 1/8

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

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

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

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

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

• question_answer59) Magnetic lines of force

A) always intersect

B) are always closed

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

D) do not pass through vacuum

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

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

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

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

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

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

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

B) the location of the geographic meridian

C) the vertical component of the earth's field

D) the direction of the earth's magnetic field

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

A) an ammeter

B) a voltmeter

C) a wattmeter

D) Both an ammeter and a voltmeter

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

A) $2\pi \sqrt{I/MB}$

B) $2\pi \sqrt{MB/I}$

C) $2\pi \sqrt{MBI}$

D) $2\pi \sqrt{I/g}$

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

A) Electric flux is coming towards sphere

B) Electric flux is coming out of sphere

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

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

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

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

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

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

D) zero

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

A) $\sqrt{\frac{\mu \varepsilon }{\mu {{ }_{0}}{{\varepsilon }_{0}}}}$

B) $\frac{\mu {{ }_{0}}{{\varepsilon }_{0}}}{\sqrt{\mu \varepsilon }}$

C) $\frac{\sqrt{\mu {{ }_{0}}{{\varepsilon }_{0}}}}{\mu \varepsilon }$

D) $\sqrt{\frac{\mu {{ }_{0}}{{\varepsilon }_{0}}}{\mu \varepsilon }}$

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

A) $F$

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

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

D) $\text{F/K}$

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

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

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

C) $2\text{F}$

D) $\text{18F}$

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

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

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

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

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

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

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

B) energy remain the same and potential difference is $nV$

C) energy increases n times and potential difference remains is $nV$

D) energy increases n times and potential difference remains same

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

A) 0.5

B) 5.0

C) 2.0

D) 8.0

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

A) becomes two times

B) becomes half

C) does not change

D) becomes one-fourth

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

A) R

B) 2R

C) R/2

D) R/3

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

A) end error

B) index error

C) error due to thermoelectric effect

D) random error

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

A) flows from copper towards iron

B) flows from iron towards copper

C) flow decreases

D) flow increases

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

A) Resistivity of electrolytes decreases on increasing temperature

B) Resistance of mercury falls on decreasing its temperature

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

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

A) $F=\text{N/e}$

B) $F=\text{Ne}$

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

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

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

A) ${{T}_{1}}>{{T}_{2}}$

B) ${{T}_{1}}\approx {{T}_{2}}$

C) ${{T}_{1}}={{T}_{2}}$

D) ${{T}_{1}}<{{T}_{2}}$

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

A) 5/2,2/5

B) 5/2,5/2

C) 2/5, 5/2

D) 2/5, 2/5

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

A) 30cal

B) 60cal

C) 100 cal

D) 120 cal

A) $9.65\times {{10}^{4}}C$

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

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

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

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

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

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

C) ${{r}_{d}}={{r}_{P}}$

D) ${{r}_{d}}=2{{r}_{P}}$

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

A) 0.23 J/T

B) 0.40 J/T

C) 0.80 J/T

D) zero

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

A) Couple on loop P will be the highest

B) Couple on loop Q will be the highest

C) Couple on loop R will be the highest

D) Couple on loop S will be the highest

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

A) $F\times r$

B) $F\times 2\pi r$

C) $F\times 2r$

D) zero

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

A) will rotate about an axis parallel to wire

B) will move away from the wire

C) will move towards the wire

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

A) $\frac{{{\mu }_{0}}}{2\pi }$

B) $\frac{{{\mu }_{0}}}{4\pi }$

C) $\frac{{{\mu }_{0}}}{8\pi }$

D) zero

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

A) 5

B) 1

C) 2

D) zero

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

A) in the plane of paper pointing towards right

B) in the plane of paper pointing towards left

C) perpendicular to the plane of paper and downwards

D) perpendicular to the plane of paper and upwards

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

A)

 First case Second case Low value clockwise Higher value anticlockwise

B)

 First case Second case Low value clockwise Equal value anticlockwise

C)

 First case Second case Higher value clockwise low value anticlockwise

D)

 First case Second case Higher value anticlockwise Low value clockwise

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

A) Ohm's Law

B) Lenz's Law

C) Kirchhoffs Law

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

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

B) End A, 3 mV

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

D) End B, 3 mV

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

A) 25 mH

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

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

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

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

A) 1mH

B) 10 mH

C) 100 mH

D) 1000 mH

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

A) $5500\,\,\overset{\text{o}}{\mathop{\text{A}}}\,$

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

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

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

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

A) 20N/C

B) 500 N/C

C) 5 N/C

D) 250 N/C

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

A) 4.55 A

B) 0.355 A

C) 0.455 A

D) 3.55 A

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

A) 50 Hz

B) 110 Hz

C) 60 Hz

D) 230 Hz

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

A) $I={{I}_{0}}{{e}^{-Rt/L}}$

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

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

D) $I={{I}_{0}}{{e}^{Rt/L}}$

• question_answer100) The efficiency of transformer is very high because

A) there is no moving part in a transformer

B) it produces very high voltage

C) it produces very low voltage

D) None of the above

A) Proton is nucleus of deuterium

B) Proton is alpha particle

C) proton is ionized hydrogen molecule

D) Proton is ionized hydrogen

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

A) Hund's rule

B) Aufbau principle

C) Uncertainty principle

D) Pauli's exclusion principle

• question_answer103) Magnetic quantum number specifies

A) size of orbitals

B) shape of orbitals

C) orientation of orbitals

D) nuclear stability

• question_answer104) The energy of an electron in nth orbit of hydrogen atom is

A) $\frac{13.6}{{{n}^{4}}}eV$

B) $\frac{13.6}{{{n}^{3}}}eV$

C) $-\frac{13.6}{{{n}^{2}}}eV$

D) $\frac{13.6}{n}eV$

• question_answer105) If wavelength of photon is $2.2\times {{10}^{-11}}m,$ $h=6.6\times {{10}^{-34}}Js,$ then momentum of photon is

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

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

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

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

• question_answer106) The bond order of $NO$molecule is

A) $1.5$

B) $2.0$

C) $2.5$

D) $3.0$

• question_answer107) The bond angle in water $({{H}_{2}}O)$ molecule is

A) ${{109}^{o}}28'$

B) ${{180}^{o}}$

C) ${{90}^{o}}$

D) ${{105}^{o}}$

• question_answer108) The triple bond between N atoms of nitrogen molecule $(N\equiv N)$ consists of

A) three $\sigma$-bond

B) two $\sigma$-bonds and one $\pi$-bond

C) one $\sigma$-bond and two $\pi$-bonds

D) three $\pi$-bonds

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

A) linear

B) tetrahedral

C) hexahedral

D) octahedral

• question_answer110) The number of $\sigma$ bonds in o-xylene is

A) $6$

B) $9$

C) $12$

D) $18$

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

A) $1\text{ }N$

B) $\text{2 }N$

C) $\text{3 }N$

D) $\text{4 }N$

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

A) $0.1\,M\,\,NaCl$

B) $0.1\text{ }M\text{ }sucrose$

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

D) $0.1\text{ }M\text{ }glucose$

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

A) $1m$

B) $0.5m$

C) $0.2m$

D) $2m$

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

A) $0.186$

B) $0.512$

C) $\frac{0.512}{1.86}$

D) $0.0512$

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

A) Surface tension

B) Osmotic pressure

C) Viscosity

D) Refractive index

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

A) $23$

B) $7$

C) $230$

D) $14$

• question_answer117) Diamond is an example of

A) covalent solid

B) electrovalent solid

C) solid with hydrogen bonding

D) glass

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

A) $_{0}{{n}^{1}}$

B) $_{-1}{{e}^{0}}$

C) $_{+1}{{e}^{0}}$

D) Energy

• question_answer119) The end product of $(4n+2)$ radioactive disintegration series is

A) $_{82}^{208}Pb$

B) $_{82}^{206}Pb$

C) $_{82}^{207}Pb$

D) $_{83}^{210}Bi$

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

A) ${{O}^{8}}$

B) $P{{b}^{212}}$

C) $F{{e}^{59}}$

D) $_{6}{{C}^{14}}$

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

A) $1/2$

B) $1/4$

C) $1/8$

D) $1/16$

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

A) $conc{{.}^{+10}}$

B) $conc{{.}^{+1}}$

C) $conc{{.}^{-1}}$

D) it is dimensionless

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

A) Increase in temperature

B) Increase in pressure

C) Removal of oxygen

D) Increase in volume

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

A) ${{K}_{p}}={{K}_{c}}$

B) ${{K}_{c}}=2{{K}_{p}}$

C) ${{K}_{p}}>{{K}_{c}}$

D) ${{K}_{c}}={{K}_{p}}{{(RT)}^{2}}$

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

A) $1$

B) $RT$

C) $\frac{1}{\sqrt{RT}}$

D) ${{(RT)}^{1/2}}$

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

A) $1.0\times {{10}^{-3}}$

B) $1.0\times {{10}^{-6}}$

C) $1.0\times {{10}^{-8}}$

D) $1.0\times {{10}^{-11}}$

• question_answer127) The pH of a ${{10}^{-8}}$ molar solution of $HCl$in water is

A) $8$

B) $-8$

C) between $7$ and $8$

D) between $6$ and $7$

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

A) $NaCl$

B) $N{{H}_{4}}Cl$

C) $KCl$

D) $N{{a}_{2}}S{{O}_{4}}$

• question_answer129) What is the correct representation for the solubility product of $Sn{{S}_{2}}$?

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

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

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

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

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

A) acidic

B) basic

C) neutral

D) slightly acidic

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

A) $q=\Delta E-W$

B) $\Delta E=q-W$

C) $\Delta E=q+W$

D) $\Delta E=q+pdV$

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

A) equals zero

B) decreases

C) increases

D) remains constant

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

A) $\frac{\ln \,2}{k}$

B) $\frac{1}{k\times a}$

C) $\frac{0.693}{k\times a}$

D) $\frac{3}{2k{{a}^{2}}}$

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

A) $T$

B) $Z$

C) $E$

D) $P$

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

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

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

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

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

• question_answer136) Oxidation number of carbon in $C{{H}_{3}}-Cl$is

A) $-3$

B) $-2$

C) $-1$

D) $0$

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

A) Gold

B) Silver

C) Zinc

D) Iron

• question_answer138) Incorrect statement regarding rusting is

A) metallic iron is oxidised to $F{{e}^{3+}}$ions

B) metallic iron is reduced to $F{{e}^{2-}}$ ions

C) oxygen gas is reduced to oxide ion

D) yellowish-brown product is formed

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

A) $S{{n}^{4+}}$

B) $S{{n}^{3+}}$

C) $S{{n}^{2+}}$

D) $S{{n}^{0}}$

• question_answer140) ${{E}^{o}}=\frac{RT}{nF}$ In${{K}_{eq}},$ this equation is called

A) Gibb's equation

B) Gibbs's-Helmholtz equation

C) Nernst equation

D) van der Waals' equation

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

A) $HN{{O}_{3}}$

B) ${{K}_{2}}C{{r}_{2}}{{O}_{7}}$

C) $KMn{{O}_{4}}$

D) ${{H}_{2}}{{O}_{2}}$

• question_answer142) The oxidation number of oxygen in ozone is

A) $-3$

B) $-2$

C) 0 (zero)

D) $+3$

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

A) copper will precipitate out

B) iron will dissolve and precipitate out thereafter

C) iron and copper both will go into solution

D) no reaction will take place

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

A) Atomic weight

B) Equivalent weight

C) Molecular weight

D) Atomic number

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

A) $NaCl$

B) $BaC{{l}_{2}}$

C) $CuS{{O}_{4}}$

D) $AlC{{l}_{3}}$

• question_answer146) In which of the following, oxygen has an oxidation state of $+2$?

A) ${{H}_{2}}{{O}_{2}}$

B) $C{{O}_{2}}$

C) ${{H}_{2}}O$

D) $O{{F}_{2}}$

• question_answer147) Point out the false statement.

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

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

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

D) Hardy-SchuIze rule is related with coagulation

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

A) $NaCl$

B) $BaC{{l}_{2}}$

C) ${{K}_{2}}Cr{{O}_{4}}$

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

• question_answer149) Which of the following statement is false?

A) A catalyst is specific in its action

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

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

D) $Ni$ is used as catalyst in the manufacture of ammonia

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

A) ores

B) minerals

C) Gangue

D) None of these

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

A) An acidic flux is needed

B) a basic flux is needed

C) Both acidic and basic flux are needed

D) Neither of them is needed

• question_answer152) An example of an oxide ore is

A) Bauxite

B) malachite

C) Zinc blende

D) feldspar

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

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

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

C) the three layers have different densities

D) The three layers are maintained at different temperatures

• question_answer154) In galvanisation, iron surface is coated with

A) tin

B) chromium

C) zinc

D) nickel

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

A) To expel the dissolved gases in blister copper

B) To bring the impurities to surface and oxidize them

C) To increase the carbon content of copper

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

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

A) Increases

B) Decreases

C) Remains unchanged

D) Decreases first then increases

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

A) third

B) fourth

C) fifth

D) sixth

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

A) Magnesium and sodium

B) Magnesium and copper

C) Magnesium and barium

D) Magnesium and potassium

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

A) ${{s}^{2}}{{p}^{4}}$

B) ${{s}^{2}}{{p}^{5}}$

C) ${{s}^{2}}{{p}^{3}}$

D) ${{s}^{2}}{{p}^{6}}$

• question_answer160) The ionic radii ${{N}^{3-}},$ ${{O}^{2-}},$ ${{F}^{-}}$and $N{{a}^{+}}$follow the order

A) ${{N}^{3-}}>{{O}^{2-}}>{{F}^{-}}>N{{a}^{+}}$

B) $N{{a}^{3-}}>N{{a}^{+}}>{{O}^{2-}}>{{F}^{-}}$

C) $N{{a}^{+}}>{{O}^{2-}}>N{{a}^{3-}}>{{F}^{-}}$

D) ${{O}^{2-}}>{{F}^{-}}>N{{a}^{+}}>N{{a}^{3-}}$

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

A) $~1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}4{{s}^{2}}$

B) $1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{10}}4{{s}^{2}}4{{p}^{1}}$

C) $1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{p}^{6}}3{{d}^{10}}4{{s}^{2}}4{{p}^{6}}$

D) $1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{2}}4{{s}^{2}}$

A) $K{{H}_{g}}{{I}_{4}}$

B) ${{K}_{2}}Hg{{I}_{4}}+N{{H}_{4}}OH$

C) ${{K}_{2}}Hg{{I}_{4}}+KOH$

D) $KHg{{I}_{4}}+N{{H}_{4}}OH$

• question_answer163) Very dilute nitric acid reacts with zinc to form zinc nitrate and

A) Ammonium nitrate

B) $N{{O}_{2}}$

C) $NO$

D) ${{N}_{2}}O$

• question_answer164) By passing ${{H}_{2}}S$ gas in acidified$KMn{{O}_{4}}$. solution, we get

A) ${{K}_{2}}S$

B) $S$

C) ${{K}_{2}}S{{O}_{3}}$

D) $Mn{{O}_{2}}$

• question_answer165) If molecular weight of $KMn{{O}_{4}}$ is ?M? then its equivalent weight in acidic medium would be

A) $M$

B) $M/2$

C) $M/5$

D) $M/4$

• question_answer166) $Xe{{F}_{6}}$ on hydrolysis gives

A) $Xe{{O}_{3}}$

B) $XeO$

C) $Xe{{O}_{2}}$

D) $Xe$

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

A) $H_{2}^{+}$

B) ${{H}^{+}}$

C) ${{H}^{-}}$

D) $H$

• question_answer168) Molecular formula of Glauber's salt is

A) $MgS{{O}_{4}},7{{H}_{2}}O$

B) $CuS{{O}_{4}},5{{H}_{2}}O$

C) $FeS{{O}_{4}}.7{{H}_{2}}O$

D) $N{{a}_{2}}S{{O}_{4}}.10{{H}_{2}}O$

• question_answer169) The metal that is extracted from sea water is

A) $Mg$

B) $Ca$

C) $Fe$

D) $Ni$

• question_answer170) Which of the following oxides reacts with $HCl$ and$NaOH$?

A) $CaO$

B) $ZnO$

C) ${{N}_{2}}{{O}_{5}}$

D) $C{{O}_{2}}$

• question_answer171) The most basic element is

A) fluorine

B) iodine

C) chlorine

D) bromine

• question_answer172) An example of a double salt is

A) Bleaching powder

B) Hypo

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

D) Potash alum

• question_answer173) Precipitate of $AgCl$ dissolves in $N{{H}_{4}}OH$ due to formation of a complex

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

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

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

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

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

A) nine

B) four

C) three

D) two

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

A) Geometrical

B) Optical

D) Ionization

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

A) $HgS$

B) $PbS$

C) $CdS$

D) $CuS$

• question_answer177) Which of the following combines with $F{{e}^{2+}}$ ions to form a brown complex?

A) ${{N}_{2}}O$

B) $NO$

C) ${{N}_{2}}{{O}_{3}}$

D) ${{N}_{2}}{{O}_{5}}$

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

A) Marble

B) Sand

C) Diamond

D) Glass

• question_answer179) An organic compound with $C=40%$and $H=6.7%$will have the empirical formula

A) $C{{H}_{2}}$

B) $C{{H}_{2}}O$

C) ${{C}_{3}}{{H}_{6}}{{O}_{3}}$

D) ${{C}_{2}}{{H}_{4}}{{O}_{2}}$

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

A) 1-chloro-3-methylbutane

B) 2-methyl-4-chlorobutane

C) 2-methyl-1-chlorobutane

D) 1-chloropentane

• question_answer181) An organic compound will show optical isomerism if

A) Four groups attached to C atom are different

B) Three groups attached to C atom are different

C) Two groups attached to C atom are different

D) All the groups attached to C atom are same

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

A) Triangular

B) Square planar

C) Tetrahedral

D) Hexagonal

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

A) Clemmensen reduction

B) Kolbe's reaction

C) Wurtz reaction

D) Cannizaro's reaction

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

A) ${{C}_{2}}{{H}_{5}}OH$

B) $C{{H}_{3}}OH$

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

D) ${{(C{{H}_{3}})}_{2}}CHC{{H}_{2}}OH$

• question_answer185) Ethylene reacts with bromine to form

A) $Br-C{{H}_{2}}-C{{H}_{3}}$

B) $C{{H}_{3}}-C-B{{r}_{3}}$

C) $Br-C{{H}_{2}}-C{{H}_{2}}-Br$

D) $CHB{{r}_{3}}$

• question_answer186) The shape of methane molecule is

A) Tetrahedral

B) Triangular

C) Planar

D) Octahedral

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

A) Methylene chloride

B) Formic acid

C) Carbon tetrachloride

D) Phosgene

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

A) Chloroform test

B) Victor Meyer test

C) Rate of esterification

D) Iodoform test

• question_answer189) Chloroform on reduction with zinc and $HCl$ forms

A) Formic acid

B) Chloropicrin

C) Methyl chloride

D) Phosgene

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

A) $HCHO$

B) $C{{H}_{3}}CHO$

C) $C{{H}_{3}}COC{{H}_{3}}$

D) $C{{O}_{2}}$

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

A) Hydrolysis

B) Oxidation

C) Hydrogenation

D) Electrolysis

• question_answer192) If formaldehyde and $KOH$are heated, then we get

A) Acetylene

B) Methane

C) Methyl alcohol

D) Ethyl formate

• question_answer193) Which of the following reagent reacts differently with $HCHO,$$C{{H}_{3}}CHO$ and$C{{H}_{3}}COC{{H}_{3}}$?

A) $HCN$

B) $N{{H}_{2}}N{{H}_{2}}$

C) $N{{H}_{2}}OH$

D) $N{{H}_{3}}$

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

A) $C{{H}_{3}}COOH$

B) $C{{H}_{3}}C{{H}_{2}}NHOH$

C) $C{{H}_{3}}CON{{H}_{2}}$

D) $C{{H}_{3}}CHO$

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

A) Low molecular weight

B) Hydrogen bonding

C) Dissociation into ions

D) Easy hydrolysis

• question_answer196) Ethyl acetate reacts with $C{{H}_{3}}MgBr$to form

A) Secondary alcohol

B) Tertiary alcohol

C) Primary alcohol and acid

D) Acid

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

A) Sulphur hexafluoride

C) Sulphurous acid

D) Phthalic acid

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

A) Temperature affects their functioning

B) pH affects their functioning

C) They always increase activation energy

D) Their reactions are specific

• question_answer199) Oils and fats together are called

A) enzymes

B) soaps

C) polymer

D) lipids

• question_answer200) The secondary structure of proteins is due to

A) Peptide bond

B) Hydrogen bond

C) van der Waals' forces

D) Ionic bond

• question_answer201) Whose secretion forms the peari?

A) Prismatic layer

B) Columnar epithelial cells of mantle

C) Ciliated epithelial cells of mantle

D) Connective tissue of mantle

• question_answer202) Striped muscles are present in

A) lungs

C) blood vessels

D) limb muscles

• question_answer203) The stored food material found in muscles is

A) protein

B) glycogen

C) lipid

D) phosphogen

A) syncytial

B) uninucleate

C) binucleate

D) anucleate

• question_answer205) The main function of tendon is

A) to join two bones

B) to join two muscles

C) to join muscles and bones

D) to join muscles and nerves

• question_answer206) Nails are formed by

A) bones

B) chitin

C) cartilage

D) keratin

• question_answer207) In our body, the blood bank is

A) red bone marrow

B) spleen

C) liver

D) heart

• question_answer208) What type of poison is ethylene dichloride?

A) Stomach poison

B) Contact poison

C) Fumigant

D) Biological control

• question_answer209) Vocal cords are situated at

A) pharynx

B) larynx

C) glottis

D) bronchial tube

A) gastric glands

B) sebaceous glands

C) thyroid gland

D) thymus gland

• question_answer211) Desmosome is the modification of

A) Golgi bodies

B) endoplasmic membrane

C) plasma membrane

D) ER-nucleus complex

• question_answer212) Bilirubin and biliverd in are present in

A) pancreatic juice

B) saliva

C) bile juice

D) intestinal juice

• question_answer213) Enzyme 'renin' is secreted by

A) cells of stomach

B) cells of intestine

C) the cortical cells of kidney

D) the cells of juxtaglomerular apparatus of kidney

• question_answer214) Dental formula of man is

A) $\frac{2123}{2123}$

B) $\frac{1223}{1223}$

C) $\frac{2132}{2132}$

D) $\frac{2213}{2213}$

• question_answer215) Muscles of alimentary canal are chiefly

A) striated and neurogenic

B) un striated and neurogenic

C) striated and myogenic

D) un striated and myogenic

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

A) 500 mL

B) 2,000 mL

C) 4,600 mL

D) 5,800 mL

• question_answer217) Loop of Henie is meant for absorption of

A) potassium

B) glucose

C) water

D) $C{{O}_{3}}$

A) ATP breaks

B) ATP is formed

C) GTP breaks

D) None of these

• question_answer219) pH of human blood is

A) 8.4

B) 7.4

C) 6.4

D) 5.4

• question_answer220) Oxygen is transported by

A) blood plasma

B) leucocytes

C) RBC

D) thrombocytes

• question_answer221) Lymph is colourless because

A) WBCs are absent

B) WBCs are present

C) Haemoglobin is absent

D) RBCs are absent

• question_answer222) Lymph (nodes) glands forms

A) hormones

B) lymph

C) antigens

D) antibodies

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

A) to assist kidneys

B) to control blood pressure

C) to assist liver

D) to produce blood

• question_answer224) Bowman's capsule is part of

A) uriniferous tubule

B) renal artery

C) renal portal vein

D) ureter

• question_answer225) Filtration takes place in

A) Malpighian capsule

B) Bowman's capsule

C) glomerulus

D) collecting tubule

• question_answer226) Main function of cerebellum is

A) balancing

B) to see

C) to hear

D) remembering

• question_answer227) Third ventricle is present in

A) heart

B) brain

C) kidney

D) liver

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

A) cerebellum

B) cerebrum

C) olfactory lobes

D) midbrain

• question_answer229) The nerve related with diaphragm is

A) vagus

B) phrenic

C) trigeminal

D) glossopharyngeal

• question_answer230) Cowper's gland is present in

A) cockroach

B) rabbit

C) earthworm

D) frog

• question_answer231) Monoestrous animals are those which have

A) one menses each month

B) one evularion each month

C) one egg

D) one breeding season in the year

• question_answer232) For ovulation in reflex ovulators

A) coitus is not necessary

B) coitus is necessary

C) plenty of food is necessary

D) plenty of food is not necessary

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

A) ovarian cell

B) oocyte

C) zygote

D) Graafian follicle

A) ovary

B) fallopian tube

C) uterus

D) None of these

A) hands

B) legs

C) shoulder

D) wrist

• question_answer236) The emergency hormone is

A) thyroxin

C) insulin

D) progesterone

• question_answer237) In a sperm, the mitochondria occur

A) in tail

B) in acrosome

C) in middle piece

• question_answer238) Life-span of human RBC is

A) 120 days

B) 90 days

C) 2-3 days

D) 20 days

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

A) pigeon

B) squirrel

C) fowl

D) owl

• question_answer240) Pharynx and middle ear are interconnected by

A) tympanic canal

B) eustachian canal

C) cochlear canal

D) vestibular canal

• question_answer241) Proprioceptors refers to the ailment of

A) chemicals

B) temperature

C) taste

D) change in the internal environment of the body

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

A) incus, malleus and stapes

B) malleus, incus and stapes

C) malleus, stapes and incus

D) stapes, malleus and incus

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

A) 1

B) 2

C) 3

D) 4

• question_answer244) Diabetes insipidus is under the control of

A) All dosterone

C) ACTH

D) TSH

• question_answer245) FSH and LH hormones together are called

A) emergency

C) neurohormones

D) outstress hormones

• question_answer246) Parathormone deficiency in man causes

A) hypercalcemia

B) hypocalcemia

C) goiter

D) All of these

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

A) over secretion of thyroxin

B) over secretion growth hormone since maturity

C) excess of vitamin-'C' in diet

D) excess secretion of TSH

• question_answer248) Which one controls the secretion of estrogen

A) HCG

B) Progesterone

C) LH

D) FSH

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

A) rRNA

B) t-RNA

C) mRNA

D) None of these

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

A) Vitamin-A

B) Vitamin-D

C) Folic acid

D) Vitamin-K

• question_answer251) Marasmum disease is caused due to

A) protein deficiency

B) obesity

C) dwarfism

D) deficiency of vitamins

• question_answer252) The brain develops from

A) ectoderm

B) mesoderm

C) endoderm

D) meso-endoderm

• question_answer253) The acrosome plays important role in

A) motility of sperm

B) penetration of ovum by sperm

C) providing energy to sperm

D) None of these

• question_answer254) The eggs of placental mammals are described as

A) microlecithal

B) telolecithal

C) centrolecithal

D) macrolecithal

• question_answer255) Oogenesis is the process for the formation of

A) red blood cells

B) sperms

C) ova

D) sperms and ova

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

A) cleavage

B) gastrulation

C) gametogenesis

D) fertilization

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

A) Destroyed

B) Impremeable and rigid

C) More elastic

D) All of the above

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

A) random mutation in DNA of somatic cells

B) increased cross-linkage of collagen and other proteins

C) cumulative result of damage to tissues by free radicals

D) All of the above

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

A) A group

B) O group

C) Any of the group

D) AB group

• question_answer260) Erythroblastosis foetalis occurs when

A) husband is $R{{h}^{-}}$ and wife $R{{h}^{-}}$

B) wife is $R{{h}^{-}}$and husband $R{{h}^{-}}$

C) wife is $R{{h}^{-}}$and husband $R{{h}^{+}}$

D) wife is $R{{h}^{-}}$and husband $R{{h}^{+}}$

• question_answer261) Match List $\text{I}$ with List $\text{II}$ and select the correct answer using the codes given below

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

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

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

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

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

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

A) dominant

B) recessive

D) favourably selected

A) abnormal enzymes

B) enzymes act on antibodies

C) antibodies act as enzymes

D) All of the above

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

A) For the segregation of replicated chromosomes

B) For equal distribution of haploid chromosomes

C) For the formation of four gametes

D) For equal distribution of genes on chromosomes

A) auricles and ventricles contract simultaneously

B) auricles and ventricles contract separately

C) only auricles contract

D) only ventricles contract

• question_answer266) Hybridoma technology was developed by

A) Taggart; 1982

B) Prie and Saxton; 1987

C) Vitella et al; 1982

D) Kohler and Milstein; 1982

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

A) 8 : 6 : 4 : 1

B) 7 : 4 :1: 4

C) 9 : 3 : 3 : 1

D) 6 : 6 : 4 : 7

• question_answer268) Acromion process is found in rabbit in

A) pectoral girdle

B) femur

C) vertebral column

D) pelvic girdle

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

A) DNA polymerase$\text{-II}$

B) Reverse transcriptase

C) Klenow fragment

D) Taq polymerase

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

A) sex chromosome of mother

B) sex chromosome of father

C) size of ovum

D) size of sperm

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

A) XYY

B) XXY

C) XO

D) XXXY

• question_answer272) The main cause of paralysis is

A) some defect in muscles

B) complete destruction of sensory nerves

C) complete destruction of motor nerves

D) None of the above

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

A) male and female producing gametes

B) blacks and whites

C) unisexual and bisexual

D) None of the above

• question_answer274) Systema naturae is concerned with

A) solar system

B) ecosystem

C) classification of plants and animals

D) natural selection

A) life history of animals

B) group of phyla

C) evolutionary history of a species from its ancestors

D) castes of flies

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

A) Mammalia

B) Pisces

C) Insecta

D) Reptilia

• question_answer277) Cray fish is a

A) crustacean animal

B) edible fish

C) poisonous fish

D) None of the above

A) Bilateral symmetry

B) Gill opening

C) Body scales

D) Cnidoblasts

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

A) Carolus Linnaeus

B) Mayr

C) J B Lamarck

D) Charles Darwin

• question_answer280) Origin of life took place in/on

A) water

B) air

C) mountains

D) land

A) similar in origin

B) similar in function

C) similar in development

D) similar in behavior

• question_answer282) Vestigial organs are those organs, which are

A) characteristic of birds

B) not of much use today

D) common

• question_answer283) Lamarckian theory deals with

A) acquired characters

B) germplasm

C) struggle for existence

D) mutation

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

A) progressive species

B) retrogressive species

C) successive species

D) digressive species

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

A) feeding catle, pigs and poultry

B) preparation of paints and varnishes

C) clarification of vinegar, wines and beer

D) production of insulin

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

A) Caria, Cyprinus, Clarias

B) Caria, Labeo, Cirrhinus

C) Cirrhinus, Cyprinus, Channa

D) Clarias, Chanos, Cyprinus

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

A) Aplocheilus

B) Gambusia

C) Legistes

D) Caria

• question_answer288) The disease 'Oriental sore' is caused by

A) bacteria

B) virus

C) Protozoa

D) fungus

• question_answer289) The carrier of Trypanosoma in man is

A) house fly

B) mosquito

C) honey bee

D) tse tse fly

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

A) mosquito

B) bug

C) louse

D) beetle

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

A) Chloremia

B) Leukaemia

C) Uremia

D) Proteinemia

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

A) Bacteria

B) Virus

C) Fungus

D) Snake venom

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

A) Malaria

B) Syphilis

C) Goiter

D) Tuberculosis

• question_answer294) Jaundice is caused by

A) contaminated water

B) pork

C) excessive sugar

D) excessive eating of Curcuma

• question_answer295) AIDS can be transmitted by

A) blood circulation

B) handshake

C) courtship

D) All of the above

• question_answer296) Smoking addiction is harmful because it produces polycyclic aromatic hydrocarbons which cause

A) reduction in oxygen transport

B) increase in blood pressure

C) cancer

D) retardation of growth of foetus

A) protein depositions in liver

B) deposition of extra fat in liver

C) rise in blood sugar level

D) cancer

• question_answer298) Dudhawa national park is located in

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

A) Organophosphates

B) Organochlorines

C) Carbonates

D) Triazines

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

A) pharyngeal gill slits

B) vertebral column

C) two pairs of pentadacyle limb

D) a movable jaw

• question_answer301) Which is not character of mitosis?

A) Leptotene

B) Zygotene

C) Pachytene

D) All of these

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

A) Purkinje

B) Virchow

C) Hooke

D) Khorana

• question_answer303) How many types of cells are known?

A) One

B) Two

C) Four

D) Five

• question_answer304) In which, mitosis does not occur?

A) Green algae

B) Fungi

C) Bacteria

D) higher plants

• question_answer305) A mature plant cell has

A) cell wall

B) vacuole

C) protoplasm

D) All of these

A) Blue-green algae

B) Bacteria

C) Fungi

D) All of the above

• question_answer307) Repulsion of homologous chromosomes takes place in

A) zygotene

B) leptotene

C) diakinesis

D) diplotene

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

A) Only 70S

B) Only 80S

C) Both [a] and [b]

D) Only SOS

• question_answer309) Synthesis of DNA takes place in

A) ${{G}_{1}}$

B) $~{{G}_{2}}$

C) S

D) None of these

• question_answer310) The genetic material of prokaryotic cells is called

A) nucleus

B) nucleolus

C) nucleoid

D) centrosome

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

A) Golgi bodies

B) Lysosome

C) Mitochondria

D) Chloroplast

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

A) Thymine

B) Uracil

D) None of these

• question_answer313) The main function of lysosome is in

A) only extracellular digestion

B) only intracellular digestion

C) Both [a] and [d]

D) None of the above

A) chromatin fibre

B) definite nucleus

C) incipient nucleus

D) None of these

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

A) Prophase

B) Metaphase

C) Anaphase

D) Telophase

A) DNA

B) RNA + Protein

C) DNA + RNA

D) DNA + Protein

• question_answer317) Four daughter cells formed after meiosis are

A) genetically similar

B) genetically different

C) anucleate

D) multinucleate

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

A) endoplasmic reticulum

B) mitochondria

C) chloroplast

D) lysosomes

• question_answer319) DNA strands are and parallel because

A) H-bonds

B) phosphate diester bonds

C) disulphide bonds

D) phosphate bonds

• question_answer320) Cell theory was proposed by

A) Schleiden and Schwann

B) Waston and Crick

C) Darwin and Wallace

D) Mendel and Morgan

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

A) first prophase

B) first anaphase

C) second metaphase

D) second anaphase

A) Nucleus

B) Golgi bodies

C) Chloroplast

D) Mitochondria

• question_answer323) Unit membrane consists of

A) Lipid + Sugar + Protein

B) Protein + Lipid + Protein

C) Lipid + Protein + Lipid

D) Protein

• question_answer324) Translation is the process, in which

A) DNA is formed on DNA template

B) RNA is formed on DNA template

C) DNA is formed on RNA template

D) Protein is formed from mRNA

A) Darwin

B) Morgan

C) Bateson and Punned

D) Mendel

• question_answer326) Principal constituents of chromosomes are

A) DNA

B) RNA

C) Both [a] and [b]

D) tRNA

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

A) Francois Jacob

B) Jacques Monod

C) Both [a] and [b]

D) None of the above

• question_answer328) The enzyme responsible for transcription is

A) DNA polymerase-I

B) RNA polymerase

C) Reverse transcriptase

D) DNA polymerase-III

A) AUG

B) UAG

C) UGA

D) UAA

• question_answer330) The direction of DNA replication is

A) from 5' end towards 3' end

B) from 3' end towards 5' end

C) amino terminus to carboxy terminus

D) carboxy terminus to amino terminus

• question_answer331) Extra chromosomal genetic material found in bacteria is

A) plasmid

B) micro some

C) ribosome

D) None of these

• question_answer332) Functional unit of gene is

A) muton

B) recon

C) cistron

D) codon

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

A) auxotroph

B) prototroph

C) autotroph

D) None of these

• question_answer334) Incomplete dominance is found in

A) Pisum sativum

B) Antirrhinum majus

C) Both [a] and [b]

D) None of the above

• question_answer335) Shape of chromosome is determined by

A) telomere

B) centromere

C) chromomere

D) centrosome

• question_answer336) How many types of genotypes are formed in ${{F}_{2}}$ progeny obtained from self pollination of a dihybrid ${{F}_{1}}$?

A) 9

B) 3

C) 6

D) 1

• question_answer337) Functioning of structural genes is controlled by

A) operator

B) promoter

C) ligase

D) regulatory gene

• question_answer338) Domestic cooking gas cylinder is filled with

A) alcohol

B) diesel oil

C) liquid petroleum gas

D) coal gas

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

B) assimilation

C) lysogeny

D) viral stability

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

A) cyano bacterium

B) mycoplasma

C) bacterium

D) virus

• question_answer341) Among the following which are the smallest organisms?

A) Bacteria

B) Mycoplasma

C) Nostoc

D) Virus

• question_answer342) The genetic material in viruses is

A) in some viruses both DNA and RNA

B) only RNA

C) only DNA

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

• question_answer343) One of the useful activities of several bacteria is

A) nitrogen fixation

B) nitrification

C) operation of biogeochemical cycles

D) All of the above

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

A) mitochondria

B) chondrisome

C) mesosome

D) centrosome

• question_answer345) Circular DNA molecule occurs in

A) viruses

B) bacteria, chloroplasts and mitochondria

C) bacteria and chloroplasts only

D) bacteria only

• question_answer346) A bacteriophage is a

A) virus attacking another virus

B) stage in the life cycle of a bacterium

C) bacterium attacking a virus

D) virus attacking a bacterium

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

A) chain

B) irregular cluster

C) cube

D) plate

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

A) reproduction

B) nutrition

C) secretion

D) respiration

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

A) cyanophages

B) hydrophytes

C) bacteria

D) bacteriophages

• question_answer350) Which one of the following can utilize molecular nitrogen $({{N}_{2}})$ as nutrient for growth?

A) Khizobium

B) Spirogyra

C) Mucor

D) Methanococcus

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

A) On different branches of the same plant

B) On different plants

C) On same branch

D) None of the above

A) cellulose

B) pectin

C) lignin

D) chitin

• question_answer353) Stomata in Funaria are found in

A) capsule

B) foot

C) seta

D) nowhere

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

A) homogamous

B) heterogamous

C) dichogamous

D) cleistogamous

• question_answer355) Eichhornia crassipes is a

A) desert plant

B) parasite

C) water plant

D) terrestrial plant

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

A) halophytes

B) heliophytes

C) hydrophytes

D) saprophytes

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

A) full mature embryo

B) cotyledons with endosperm and perican

C) cotyledons filled with starch

D) None of the above

• question_answer358) Double fertilization means fusion of

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

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

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

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

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

A) Lilium and Fritillaria

B) mango and sugarcane

C) papaya and pea

D) Brassica and candytuft

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

A) certain enzymes

B) dicotyledonous hormone

C) growth hormone

D) None of the above

• question_answer361) A component of xylem is

A) sieve tube

B) medullary ray

C) sclereid

D) tracheid

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

A) organ

B) organelle

C) tissue

D) None of these

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

A) parenchyma

B) sclerenchyma

C) collenchyma

D) sclereids

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

A) protonema

B) promeristem

C) ground meristem

D) procambium

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

A) Copper

B) Iron

C) Manganese

D) Zinc

• question_answer366) Sinks are related to

A) transport of organic solutes

B) stomata

C) enzymes

D) phytochrome

• question_answer367) Supply ends in transport of solute are

A) green leaves and storage organs

B) root and stem

C) xylem and phloem

D) Hormones and enzymes

• question_answer368) Stomata can open at night also in

A) xerophyte

B) gametophyte

C) hydrophyte

D) None of these

A) Curtis

B) Steward

C) Anderson

D) J C Bose

• question_answer370) Agranal chloroplasts occur in certain

A) succulents

B) ${{C}_{3}}-$plants

C) ${{C}_{4}}-$plants

D) hydrophytes

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

A) 400nm

B) 550nm

C) 660nm

D) 70nm

• question_answer372) Which are related with photorespiration?

A) Spherosome

B) Lysosomes

C) Glyoxysomes

D) Peroxisomes

• question_answer373) The end product of glycolysis is

A) glucose

B) fructose

C) pyruvic acid

D) ethyl alcohol

• question_answer374) RQ is more than one in case of

A) fat

B) fructose

C) glucose

• question_answer375) Enzymes concerned with transfer of electrons are

A) hydrolysases

B) dehydrogenases

C) transminases

D) proteases

• question_answer376) Nitrogen is the essential component of

A) carbohydrates

B) fats

C) proteins

D) oil

• question_answer377) Phytochrome was discovered by

A) W Went

B) Gamer and Allard

C) F F Blackman

D) R Hill

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

A) ethylene

B) cytokinin

C) IAA

D) gibberellins

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

A) florigen

B) chlorophyll

C) plastocyanin

D) phytochrome

• question_answer380) Name the famous plant ecologist

A) Jagdish Chandra Bose

B) Birbal Sahani

C) Ramdeva Mishra

D) Charles Darwin

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

A) Economic botany

B) Ecology

C) pollen grain analysis

D) mining the area

• question_answer382) The significance of ecosystem lies in

A) flow of energy

B) cycling of matter

C) Both [a] and [b]

D) None of the above

• question_answer383) Biological equilibrium is found among the

A) producers and consumers

B) producers and decomposers

C) producers, consumers and decomposers

D) producers and light

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

A) man

B) parasites

C) predators

D) available food

• question_answer385) The two components of an ecosystem are

A) biotic and abiotic

B) plants and animals

C) weeds and micro-organisms

D) plants and light

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

A) linear

B) upright

C) irregular

D) inverted

• question_answer387) One of the important effects of $S{{O}_{2}}$ and its transformation products on plants is

A) plasmolysis

B) destruction of chlorophyll

C) destruction of Golgi bodies

D) destruction of cell wall

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

A) carbon tetrachloride

B) sulphur dioxide

C) carbon monoxide

D) fluorocarbon

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

A) light

B) micro-organisms

C) aquatic plants

D) fishes

• question_answer390) Spraying of DDT on crops produces pollution of

A) soil and water

B) air and soil

C) crops and air

D) air and water

• question_answer391) Which one is not dangerous

A) bio pollutants

B) ozone layer

C) nuclear blast

D) deforestation

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

A) Rauwolfia serpentine

C) Colchicum luteum

D) Digitalis purpurea

• question_answer393) Maximum sugarcane grown in

B) Bihar

C) Punjab

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

A) Gram

B) Soyabean

C) Wheat

D) Rice

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

A) Ethnobotany

B) Palaeobotany

C) Economic botany

D) Microbiology

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

A) Jute

B) Cotton

C) Flax

D) Sisal

• question_answer397) Botanical name of tea is

A) Piper nigrum

B) Thea/Camellia sinensis

C) Coffea Arabica

D) Tectona grandis

• question_answer398) Which can preserve food stuffs?

A) Salt and sugar

B) Sugar and vinegar

C) Vinegar

D) All of these

• question_answer399) Forest research institute is situated at

A) Lucknow

B) Bhopal