# Solved papers for Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2004

### done Chhattisgarh PMT Solved Paper-2004

• question_answer1) Dimensions of which of the following three quantities are the same?

A) Work, energy, force

B) Velocity, momentum, impulse

C) Potential energy, kinetic energy, momentum

D) Pressure, stress, coefficient of elasticity

• question_answer2) From the following pairs, choose the pair that does not have identical dimensions.

A) Angular momentum and Planck's constant

B) Moment of inertia and moment of force

C) Work and torque

D) Impulse and momentum

• question_answer3) A body starts to fall freely under gravity. The distance covered by it in first, second and third second are in ratio

A) 1 : 3 : 5

B) 1 : 2 : 3

C) 1: 4: 9

D) 1: 5 : 6

• question_answer4) For a projectile on the horizontal surface of a planet $y=8t-5{{t}^{2}}$ m shows height and $x=8\,t$m shows the horizontal distance, then the velocity with which the projectile is projected is

A) 8m/s

B) 6 m/s

C) 10 m/s

D) 100 m/s

• question_answer5) A motorcycle is going on an over bridge of radius R. The driver maintains a constant speed. As the motorcycle is ascending on the over bridge, the normal force on it

A) increases

B) decreases

C) remains the same

D) fluctuates

• question_answer6) A body of mass 0.5 kg is projected under gravity with a speed of 98 m/s at an angle of $60{}^\circ$ with the horizontal. The change in momentum (in magnitude) of the body is

A) 24.5 N-s

B) 49.0 N-s

C) 98.0 N-s

D) 50.0 N-s

• question_answer7) A body of mass 10 kg is moving with a constant velocity of 10 m/s. When a constant force acts for 4 s on it, it moves with a velocity 2 m/s in the opposite direction. The acceleration produced in it is

A) 3 m/s2

B) - 3 m/s2

C) 0.3 m/s2

D) - 0.3 m/s2

• question_answer8) A body of mass M is kept on a rough horizontal surface [friction coefficient =u). A person is trying to pull the body by applying a horizontal force F but the body is not moving then

A) $F=Mg$

B) $F=\mu Mg$

C) $Mg\le F\le Mg\sqrt{1+{{\mu }^{2}}}$

D) $Mg\ge F\ge Mg\sqrt{1+{{\mu }^{2}}}$

• question_answer9) A bullet of mass m moving with velocity v strikes a block of mass M at rest and gets embedded into it. The kinetic energy of the composite block will be

A) $\frac{1}{2}m{{v}^{2}}\times \frac{m}{(m+M)}$

B) $\frac{1}{2}m{{v}^{2}}\times \frac{M}{(m+M)}$

C) $\frac{1}{2}m{{v}^{2}}\times \frac{(M+m)}{M}$

D) $\frac{1}{2}M{{v}^{2}}\times \frac{m}{(m+M)}$

• question_answer10) One-fourth length of a spring of force constant k is cut away. The force constant of the remaining spring will be

A) $\frac{3}{4}k$

B) $\frac{4}{3}k$

C) k

D) 4k

• question_answer11) The force constants of two springs are ${{k}_{1}}$ and${{k}_{2}}$ respectively. Both are stretched till their potential energies are equal. The forces ${{f}_{1}}$ and ${{f}_{2}}$ applied on them are in the ratio

A) ${{k}_{1}}:{{k}_{2}}$

B) ${{k}_{2}}:{{k}_{1}}$

C) $\sqrt{{{k}_{1}}}:\sqrt{{{k}_{2}}}$

D) $\sqrt{{{k}_{2}}}:\sqrt{{{k}_{1}}}$

• question_answer12) A fighter plane is moving in a vertical circle of radius r. Its minimum velocity at the highest point of the circle will be

A) $\sqrt{3gr}$

B) $\sqrt{2gr}$

C) $\sqrt{gr}$

D) $\sqrt{gr/2}$

• question_answer13) A spring of length L and uniform cross-section is spread on a smooth plane. One of its ends is pulled by a force F. Find the tension in it at a distance I from this end.

A) $\frac{l}{2}F$

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

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

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

• question_answer14) A particle is making uniform circular motion with angular momentum J. If its kinetic energy is made half and angular frequency be doubled, its new angular momentum will be

A) 2J

B) 4J

C) J/2

D) J/4

• question_answer15) Three rings each of mass M and radius R are arranged as shown in the figure. The moment of inertia of the system about YY' will be

A) 3 MR2

B) 3/2 MR2

C) 5 MR2

D) 7/2 MR2

• question_answer16) If the radius of the earth were to shrink by 1% its mass remaining the same, the acceleration due to gravity on the earth's surface would

A) decrease by 1%

B) remain unchanged

C) increase by 1%

D) increase by 2%

• question_answer17) A satellite is moving around the earth with speed v in a circular orbit of radius r. If the orbit radius is decreased by 1%, the speed of the satellite will

A) increase by 1%

B) increase by 0.5%

C) decrease by 1%

D) decrease by 0.5%

• question_answer18) How much energy will be necessary for making a body of 500 kg escape from the earth? $\text{ }\!\![\!\!\text{ g}\,\text{=}\,\text{9}\text{.8}\,\text{m}{{\text{s}}^{2}},$ radius of the earth $\text{6}\text{.4 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{6}}}\text{m }\!\!]\!\!\text{ }$

A) About $9.8\times {{10}^{6}}J$

B) About $6.4\times {{10}^{8}}J$

C) About $3.1\times {{10}^{10}}J$

D) About $27.4\times {{10}^{12}}J$

• question_answer19) A wire of length L and cross-sectional area A is made of a material of Young's modulus Y. It is stretched by an amount x. The work done is

A) $YxA/2L$

B) $Y{{x}^{2}}A/L$

C) $Y{{x}^{2}}A/2L$

D) $2Y{{x}^{2}}A/L$

• question_answer20) A capillary tube, made of glass, is dipped into mercury. Then,

A) mercury rises in the capillary tube

B) mercury rises and flows out of the capillary tube

C) mercury descends in the capillary tube

D) mercury neither rises nor descends in the capillary tube

• question_answer21) At which of the following temperature the root mean square velocity of gaseous hydrogen molecules will be equal to root mean square velocity of oxygen molecules at $47{}^\circ C$. ?

A) 20 K

B) 80 K

C) - 73 K

D) 3 K

• question_answer22) The pressure of a gas in a vessel is ${{P}_{0.}}$ masses of all the molecules are halved and their speeds are doubled, the resulting pressure $p$ will be

A) $4{{p}_{0}}$

B) ${{p}_{0}}/2$

C) ${{p}_{0}}$

D) $2{{p}_{0}}$

• question_answer23) For a gas, if$\gamma =1.4,$ then atomicity ${{C}_{p}}$ and${{C}_{v}}$ of the gas are respectively

A) monoatomic, 5/2 R, 3/2 R

B) monoatomic, 7/2 R, 5/2 R

C) diatomic, 7/2 R, 5/2 R

D) triatomic, 7/2 R, 5/2 R

• question_answer24) During the adiabatic expansion of 2 moles of a gas, the change in internal energy was found to be equal to -100 J. The work done during the process will be equal to

A) zero

B) -100 J

C) 200 J

D) 100 J

• question_answer25) In an adiabatic expansion of a gas initial and final temperatures are ${{T}_{1}}$ and ${{T}_{2}}$ respectively, then the change in internal energy of the gas is

A) $R\text{/ }\!\!\gamma\!\!\text{ }-1({{T}_{2}}-{{T}_{1}})$

B) $R\text{/ }\!\!\gamma\!\!\text{ }-1({{T}_{1}}-{{T}_{2}})$

C) $R({{T}_{2}}-{{T}_{1}})$

D) zero

• question_answer26) The lengths and radii of two rods made of same material are in the ratio 1:2 and 2:3 respectively. If the temperature difference between the ends for the two rods be the same, then in the steady state, the amount of heat flowing per second through them will be in the ratio

A) 1 :1

B) 4 : 3

C) 8 : 9

D) 3 : 2

• question_answer27) Which of the following makes the best choice for cooking utensils?

A) High specific heat and high conductivity

B) Low specific heat and low conductivity

C) High specific heat and low conductivity

D) Low specific heat and high conductivity

• question_answer28) A hot liquid takes 5 min to cool from $70{}^\circ C$ to $60{}^\circ C$. How long will it take to cool from $60{}^\circ C$ to $50{}^\circ C$?

A) 5 min

B) more than 5 min

C) less than 5 min

D) less or more than 5 min depending on the nature of liquid

• question_answer29) At temperature T, the power radiated by a body is Q watt. At the temperature 3T, the power radiated by it will be

A) 3Q

B) 9Q

C) 27 Q

D) 81 Q

• question_answer30) A particle of mass 10 g is executing simple harmonic motion with an amplitude of 0.5 m and periodic time of ($\text{ }\!\!\pi\!\!\text{ /5}$) second. The maximum value of the force acting on the particle is

A) 25 N

B) 5 N

C) 2.5 N

D) 0.5 N

• question_answer31) The period of vibration of a mass m suspended from a spring is 2 s. If along with it another mass of 2 kg is also suspended, the period of oscillation increases by one second. The mass m will be

A) 2 kg

B) 1 kg

C) 1.6kg

D) 2.6 kg

• question_answer32) A particle is executing simple harmonic motion with frequency$f.$ The frequency at which its kinetic energy changes into potential energy is

A) $f\text{/2}$

B) $f$

C) $2f$

D) $4f$

• question_answer33) The lengths of two open organ pipes are $l$ and $(l+\Delta l)$ respectively. Neglecting end correction the frequency of beats between them will be approximately

A) $\frac{v}{2l}$

B) $\frac{v}{4l}$

C) $\frac{v\Delta l}{2{{l}^{2}}}$

D) $\frac{v\Delta l}{l}$ (here v is the speed of sound)

• question_answer34) A source of sound is moving with constant velocity of 20 m/s emitting a note of frequency 1000 Hz. The ratio of frequencies observed by a stationary observer while the source is approaching him and after it crosses him will be (speed of sound v = 340 m/s)

A) 9 : 8

B) 8 : 9

C) 1:1

D) 9 :10

• question_answer35) The equation of a stationary wave is $y=0.8\,\cos \,\left( \frac{\pi x}{20} \right)\,\sin \,200\,\pi t$ where x is in and t is in sec. The separation between consecutive nodes will be

A) 20 cm

B) 10 cm

C) 40cm

D) 30cm

• question_answer36) The distance travelled by light in glass (refractive index = 1.5) in a nanosecond will be

A) 45cm

B) 40cm

C) 30cm

D) 20cm

• question_answer37) Two phase related and monochromatic beams of light have intensities $I$ and $4I.$ Possible maximum and minimum intensities in the resultant beam obtained due to superposition are,

A) $5I\,\text{and}\,I$

B) $5I\,\text{and}\,3I$

C) $9I\,\text{and}\,3I$

D) $9I\,\text{and}\,I$

• question_answer38) A light ray is incident normally on a plane mirror. The angle of reflection will be

A) $135{}^\circ$

B) $90{}^\circ$

C) $45{}^\circ$

D) $0{}^\circ$

• question_answer39) If refractive indices of water and glass with respect to vacuum be 4/3 and 3/2 respectively, the refractive index of glass with respect to water will be

A) 9/8

B) 8/9

C) 1

D) 2

• question_answer40) Light passes from vacuum into glass at incident angle $45{}^\circ$. Which property of the light wave remains unchanged?

A) Direction of motion

B) Speed

C) Wavelength

D) Frequency

• question_answer41) A convex lens has a focal length$f.$ It is cut into two parts along the dotted line as shown in the figure. The focal length of each part will be

A) $f\text{/2}$

B) $f$

C) $\text{3/2}f$

D) $2f$

• question_answer42) The nature of sun's spectrum is

A) continuous spectrum with absorption lines

B) lines spectrum

C) the spectrum of the helium atom

D) band spectrum

• question_answer43) A defective eye cannot see close objects clearly because their image is formed

A) on the eye lens

B) between eye lens and retina

C) on the retina

D) beyond retina

• question_answer44) A telescope of diameter 2 m uses light of wavelength $5000\,\,\overset{\text{o}}{\mathop{\text{A}}}\,$ for viewing stars. The minimum angular separation between two stars whose image is seen just resolved by this telescope is

A) $0.31\times {{10}^{-6}}\,\text{rad}$

B) $0.25\times {{10}^{-6}}\,\text{rad}$

C) $0.6\times {{10}^{-3}}\,\text{rad}$

D) $0.5\times {{10}^{-3}}\,\text{rad}$

• question_answer45) Velocity of light is minimum in

A) vacuum

B) water

C) glass

D) diamond

• question_answer46) A particle of mass m and charge q is accelerated through a potential difference of V volt. Its energy will be

A) $qV$

B) $mqV$

C) $(q/m)V$

D) $q/V$

• question_answer47) Photons of energy 6 eV are incident on a metal surface whose work function is 4 eV, The minimum kinetic energy of the emitted photoelectrons will be

A) zero

B) 1 eV

C) 2eV

D) 10 eV

• question_answer48) For the photoelectric effect, the maximum kinetic energy (KE) of the emitted photoelectrons is plotted against the frequency v of the incident photons as shown in the figure. The slope of the curve gives

A) charge of the electron

B) work function of the metal

C) Planck's constant

D) ratio of the Planck's constant to electronic charge

• question_answer49) The unit of Planck's constant h is that of

A) energy

B) work

C) linear momentum

D) angular momentum

• question_answer50) Light of frequency $4{{v}_{0}}$ is incident on the metal of the threshold frequency ${{v}_{0}}.$ The maximum kinetic energy of the emitted photoelectrons is

A) $3h{{v}_{0}}$

B) $2h{{v}_{0}}$

C) $\frac{3}{2}h{{v}_{0}}$

D) $\frac{1}{2}h{{v}_{0}}$

• question_answer51) An electron and a proton are kept in a uniform electric field. The ratio of their acceleration will be

A) unity

B) zero

C) ${{\text{m}}_{p}}\text{/}{{\text{m}}_{\text{e}}}$

D) ${{\text{m}}_{e}}\text{/}{{\text{m}}_{p}}$

• question_answer52) In a X-ray tube. X-rays are produced by electrons accelerated by V volt. The maximum frequency of the X-rays is

A) $ehV$

B) $hV\text{/e}$

C) $eh\text{/V}$

D) $eV\text{/h}$

• question_answer53) The penetrating power of X-rays can be increased by

A) increasing the current in the filament

B) decreasing the current in the filament

C) increasing the potential difference between the cathode and the anode

D) decreasing the potential difference between the cathode and the anode

• question_answer54) Two wires P and Q made up of different materials have same resistance at room temperature, when heated, resistance of P increases and that of Q decreases. We conclude that

A) P and Q both are conductors but because of being made of different materials it happens so

B) P is n-type semiconductor and Q is p-type semiconductor

C) P is semiconductor and Q is conductor

D) P is conductor and Q is semiconductor

• question_answer55) The band gap in germanium and silicon in eV respectively is

A) 0.7,1.1

B) 1.1, 0.7

C) 1.1, 0

D) 0,1.1

• question_answer56) A full wave rectifier circuit along with the input and output voltages is shown in the figure. The contribution to output voltage from diode 2 is

A) A, C

B) B, D

C) B,C

D) A,D

• question_answer57) The electron in the lowest (n = 1) orbit in hydrogen atom has energy - 13.6 eV. How much energy is required to ionize a hydrogen atom which is already in the first excited level?

A) 3.4 eV

B) 10.2 eV

C) 13.6 eV

D) 1.9 eV

• question_answer58) The ratio of minimum to maximum wavelength in Balmer series is

A) 5 : 9

B) 5 : 36

C) 1 : 4

D) 3 : 4

• question_answer59) A nucleus $_{z}^{A}X$ emits an a-particle. The resultant nucleus emits $a\text{ }\!\!\beta\!\!\text{ -}$particle. The respective atomic and mass numbers of the final nucleus will be

A) Z - 3, A - 4

B) Z -1, A - 4

C) Z - 2, A - 4

D) Z, A - 2

• question_answer60) What fraction of a radioactive material will get disintegrated in a period of two half-lives?

A) Whole

B) Half

C) One-fourth

D) Three-fourth

• question_answer61) At 0 K, intrinsic semiconductors behaves as

A) a perfect conductor

B) a super conductor

C) a semiconductor

D) a perfect insulator

• question_answer62) To obtain electrons as majority charge carries in a semiconductor, the impurity mixed is

A) monovalent

B) divalent

C) trivalent

D) pentavalent

• question_answer63) The ratio of forward biased to reverse biased resistance for p-n junction diode is

A) 10-1 :1

B) 10-2:1

C) 10-3 :1

D) 10-2 : 1

• question_answer64) For germanium crystal, the forbidden energy gap in joule is

A) $1.12\times {{10}^{-19}}$

B) $1.76\times {{10}^{-19}}$

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

D) zero

• question_answer65) The incorrect statement regarding the lines of force of the magnetic field B is

A) magnetic intensity is a measure of lines of force passing through unit area held normal to it

B) magnetic lines of force form a close curve

C) inside a magnet, its magnetic lines of force move from north pole of a magnet towards its south pole

D) magnetic lines of force never cut each other

• question_answer66) A bar magnet of magnetic moment M and length L is cut into two equal parts each of length L/2. The magnetic moment of each part will be

A) M

B) M/4

C) $\sqrt{2M}$

D) M/2

• question_answer67) When 2 A current is passed through a tangent galvanometer, it gives a deflection of $30{}^\circ$. For $60{}^\circ$ deflection, the current must be

A) 1A

B) $2\sqrt{3}\text{A}$

C) 4A

D) 6 A

• question_answer68) At a certain place the horizontal component of the earth's magnetic field is ${{B}_{0}}$ and the angle of dip is $45{}^\circ$. The total intensity of the field at that place will be

A) ${{B}_{0}}$

B) $\sqrt{2}{{B}_{0}}$

C) $2B_{0}^{{}}$

D) $B_{0}^{2}$

• question_answer69) The field at a point distant r from an electric dipole is proportional to

A) 1/r

B) 1/r2

C) 1/r3

D) r2

• question_answer70) What is the magnitude of a point charge which produces an electric field of 2 N/C at a distance of 60 cm? $[\frac{1}{4\pi {{\varepsilon }_{0}}}=9\times {{10}^{9}}\text{N-}{{\text{m}}^{\text{2}}}\text{/}{{\text{C}}^{\text{2}}}\text{ }\!\!]\!\!\text{ }$

A) $8\times {{10}^{11}}C$

B) $2\times {{10}^{-12}}C$

C) $3\times {{10}^{-11}}C$

D) $6\times {{10}^{-10}}C$

• question_answer71) As shown in the figure, charges +q and - q are placed at the vertices B and C of an isosceles triangle. The potential at the vertex A is

A) $\frac{1}{4\pi {{\varepsilon }_{0}}}.\frac{2q}{\sqrt{{{a}^{2}}+{{b}^{2}}}}$

B) $\text{zero}$

C) $\frac{1}{4\pi {{\varepsilon }_{0}}}.\frac{q}{\sqrt{{{a}^{2}}+{{b}^{2}}}}$

D) $\frac{1}{4\pi {{\varepsilon }_{0}}}.\frac{(-q)}{\sqrt{{{a}^{2}}+{{b}^{2}}}}$

• question_answer72) A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. The electric field at the centre of the sphere will be

A) 50V/m

B) 10V/m

C) 5V/m

D) zero

• question_answer73) Angle between equipotential surface and lines of force is

A) zero

B) $180{}^\circ$

C) $90{}^\circ$

D) $45{}^\circ$

• question_answer74) After fully charging a parallel plate air capacitor, battery is removed. A dielectric slab is now put between the plates. For this incidence, the correct statement is

A) charge on plates decreases

B) charge on plates does not change , potential difference increases

C) charge on plates does not change? potential difference decreases and energy stored decreases

D) charge on plates does not change, potential difference increases and energy stored also increases

• question_answer75) A hollow metallic sphere of radius 3 cm 5 charged so that potential on its surface becomes 5 V. The potential at the centre of sphere will be (in volt)

A) zero

B) 5

C) 3

D) 10

• question_answer76) When a potential is applied across the ends of a linear metallic conductor, then

A) the free electrons are accelerated continuously from the lower potential end to the higher potential end of the conductor

B) the free electron are accelerated continuously from the higher potential end to the lower potential end of the conductor

C) the free electrons acquire a constant drift velocity from the lower potential end to the higher potential end of the conductor

D) the free electrons are set in motion from their position of rest

• question_answer77) In a neon discharge tube$2.9\times {{10}^{18}}$ Ne ions move to the right each second, while$1.2\times {{10}^{18}}$ electrons move to the left per sec, electron charge is $1.6\times {{10}^{-19}}C.$ The current in the discharge tube is

A) 1 A towards right

B) 0.66 A towards right

C) 0.66 A towards left

D) zero

• question_answer78) When a resistance of 2$\Omega$ is connected across the terminals of a cell, the current is 0.5 A. When the resistance is increased to 5$\Omega ,$ the current is 0.25 A. The emf of the cell is

A) 1.0 V

B) 1.5V

C) 2.0V

D) 2.5V

• question_answer79) An electric heater, kept in vacuum, is heated continuously by passing electric current. Its temperature

A) will go on rising with time

B) will stop rising after sometime as it will lose heat to the surroundings by conduction

C) will rise for sometime and thereafter will start falling

D) will become constant after sometime because of loss of heat due to radiation

• question_answer80) Heat produced in a wire of resistance R due to current flowing at a constant potential difference is proportional to

A) 1/R2

B) 1/R

C) R

D) R2

• question_answer81) There are two electric bulbs of 40 W and 100 W. Which one will be brighter when first they are connected in series and then in parallel

A) 40 W in series and 100 W in parallel

B) 100 W in series and 40 W in parallel

C) 40 W both in series and parallel will be uniform

D) 100 W both in series and parallel will be uniform

• question_answer82) In charging a battery of motor car, the following effect of electric current is used

A) magnetic

B) heating

C) chemical

D) induction

• question_answer83) To convert the range of a G ohm resistance voltmeter from V to nV, the value of series resistance needed is

A) $(n-1)G$

B) $\text{G/}n$

C) $nG$

D) $\text{G/}(n-1)$

• question_answer84) If the angular momentum of an electron is $\mathbf{\vec{J}},$ then the magnitude of the magnetic moment will be

A) $\frac{eJ}{m}$

B) $\frac{eJ}{2m}$

C) $eJ2m$

D) $\frac{2m}{eJ}$

• question_answer85) A 100$\Omega$ galvanometer gives full scale deflection at 10 mA. How much shunt is required to read 100 mA?

A) $11.11\,\Omega$

B) $9.9\,\Omega$

C) $1.1\,\Omega$

D) $4.4\,\Omega$

• question_answer86) The ratio of the magnetic field at the centre of a current carrying coil of radius a and at a distance x from centre of the coil on its axial line is a

A) $\frac{1}{\sqrt{2}}$

B) $\sqrt{2}$

C) $\frac{1}{2\sqrt{2}}$

D) $2\sqrt{2}$

• question_answer87) On connecting a battery to the two comers of a diagonal of a square conductor frame of side $a,$ the magnitude of the magnetic field at the centre will be

A) zero

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

C) $\frac{2{{\mu }_{0}}}{\pi a}$

D) $\frac{4{{\mu }_{0}}i}{\pi a}$

• question_answer88) Lorentz force is given by the following formula

A) $\mathbf{\vec{F}}=q\mathbf{\vec{E}}$

B) $\mathbf{\vec{F}}=q(\mathbf{\vec{V}}\times \mathbf{\vec{B}})$

C) $\mathbf{\vec{F}}=q\mathbf{\vec{E}}+q(\mathbf{\vec{V}}\times \mathbf{\vec{B}})$

D) $\mathbf{\vec{F}}=q\mathbf{\vec{E}}+q(\mathbf{\vec{B}}\times \mathbf{\vec{V}})$

• question_answer89) When a charged particle enters in a uniform magnetic field, its kinetic energy

A) remains constant

B) increases

C) decreases

D) becomes zero

• question_answer90) A long sol enoid has n turns per metre and current $I$ ampere is flowing through it. The magnetic field at the ends of solenoid is

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

B) ${{\mu }_{0}}nI$

C) zero

D) $2{{\mu }_{0}}nI$

• question_answer91) Biot-Savart law is given by the following formula [here k=$({{\mu }_{0}}\text{/4 }\!\!\pi\!\!\text{ })]$

A) $d\,\mathbf{\vec{B}}=ki\frac{d\mathbf{\vec{l}}\times \mathbf{\hat{r}}}{{{r}^{3}}}$

B) $d\,\mathbf{\vec{B}}=k{{i}^{2}}\frac{d\mathbf{\vec{l}}\times \mathbf{\hat{r}}}{{{r}^{3}}}$

C) $d\,\mathbf{\vec{B}}=ki\frac{d\mathbf{\vec{l}}\times \mathbf{\vec{r}}}{{{r}^{3}}}$

D) $d\,\mathbf{\vec{B}}=ki\frac{\mathbf{\vec{r}}\times d\,\mathbf{\vec{l}}}{{{r}^{2}}}$

• question_answer92) A circular coil of 500 turns of wire has an enclosed area of 0.1 m2 per turn. It is kept perpendicular to a magnetic field of induction 0.2 T and rotated by $180{}^\circ$ about a diameter perpendicular to the field in 0.1 s. How much charge will pass when the coil is connected to a galvanometer with a combined resistance of son?

A) 0.2 C

B) 0.4 C

C) 2 C

D) 4 C

• question_answer93) The self-inductance of a solenoid of length $l,$ area of cross-section A and having N turns is

A) ${{\mu }_{0}}{{N}^{2}}\text{A/}l$

B) ${{\mu }_{0}}N\text{A/}l$

C) ${{\mu }_{0}}{{N}^{2}}l\text{A}$

D) ${{\mu }_{0}}N\text{A}l$

• question_answer94) The frequency for which a 5uF capacitor has a reactance of 1/1000$\Omega$ is given by

A) 100/$\pi$MHz

B) 1000/$\pi$Hz

C) 1/1000 Hz

D) 1000 Hz

• question_answer95) The unit of inductance is

A) Volt/Ampere

B) Joule/Ampere

C) Volt x Second/Ampere

D) Volt x Ampere/Second

• question_answer96) An alternating emf is applied to purely capacitive circuit. The phase relation between emf and current flowing in the circuit is

A) emf is ahead of current by $\text{ }\!\!\pi\!\!\text{ /2}$

B) current is ahead of emf by$\text{ }\!\!\pi\!\!\text{ /2}$

C) current lags behind emf by$\text{ }\!\!\pi\!\!\text{ }$

D) current is ahead of emf by $\text{ }\!\!\pi\!\!\text{ }$

• question_answer97) In a circuit, the value of the alternating current is measured by an ammeter as 10 A. Its peak value will be

A) 10 A

B) 20 A

C) 14.14 A

D) 7.07 A

• question_answer98) In a series L-C-R circuit, operated with an AC are angular frequency a, the total impedance s

A) ${{[{{R}^{2}}+{{(L\omega -C\omega )}^{2}}]}^{1/2}}$

B) ${{\left[ {{R}^{2}}+{{\left( L\omega -\frac{1}{C\omega } \right)}^{2}} \right]}^{1/2}}$

C) ${{\left[ {{R}^{2}}+{{\left( L\omega -\frac{1}{C\omega } \right)}^{2}} \right]}^{1/2}}$

D) ${{\left[ {{(R\omega )}^{2}}+{{\left( L\omega -\frac{1}{C\omega } \right)}^{2}} \right]}^{1/2}}$

• question_answer99) In a L-R circuit, the value of L is $(0.\text{4/ }\!\!\pi\!\!\text{ })$ H sar the value of R is 30$\Omega$. If in circuit, an alternating emf of 200 V at 50 cycle/s is connected, the impedance of the circuit and current will be

A) 11.$\Omega ,$ 17.5A

B) 30.$\Omega ,$6.5A

C) 40.$\Omega ,$ 5 A

D) 50$\Omega ,$ 4 A

• question_answer100) The coils of a step down transformer have 501 and 5000 turns. In the primary coil an AC of 4 A at 2200 V is sent. The value of the current and potential difference in secondary coil will be

A) 20 A, 220V

B) 0.4 A, 22000V

C) 40 A, 220 V

D) 40 A, 22000 V

• question_answer101) The maximum number of electrons in an atom with $l=2$ and $n=3$ is

A) $2$

B) $6$

C) $12$

D) $10$

• question_answer102) Which of the following expressions gives the de-Broglie relationship?

A) $\frac{h}{mv}=p$

B) $\lambda =\frac{h}{mv}$

C) $\lambda =\frac{h}{mp}$

D) $\lambda m=\frac{v}{p}$

• question_answer103) What is the electronic configuration: $C{{u}^{2+}}(Z=29)$ of least position?

A) $[Ar]4{{s}^{1}},3{{d}^{8}}$

B) $[Ar]4{{s}^{2}},3{{d}^{10}},4{{p}^{1}}$

C) $[Ar]4{{s}^{1}},3{{d}^{10}}$

D) $[Ar]3{{d}^{9}}$

• question_answer104) Which of the following orbitals has a dumb-bell shape?

A) $s$

B) $p$

C) $d$

D) $f$

• question_answer105) The electronic configuration of metal M is $1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{1}},$The formula of its oxide will be

A) $MO$

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

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

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

• question_answer106) Which of the following statements regarding covalent bond is not true?

A) The electrons are shared between atoms.

B) The bond is non-directional.

C) The strength of the bond depends upon the extent of overlapping.

D) The bonds formed may or may not be polar.

• question_answer107) Directed bonds in water form an angle of

A) ${{90}^{o}}$

B) ${{120}^{o}}$

C) ${{104.5}^{o}}$

D) ${{60}^{o}}$

• question_answer108) Hydrogen bonding is not present in

A) glycerine

B) water

C) hydrogen sulphide

D) hydrogen fluoride

• question_answer109) $s{{p}^{3}}$hybridisation leads to which shape of the molecule?

A) Tetrahedron

B) Octahedron

C) Linear

D) Plane triangle

• question_answer110) Which one of the following is not an ideal solution?

A) ${{C}_{2}}{{H}_{5}}Br,{{C}_{2}}{{H}_{5}}I\,\,mixture$

B) ${{C}_{6}}{{H}_{5}}Cl,{{C}_{6}}{{H}_{5}}Br\,mixture$

C) ${{C}_{6}}{{H}_{6}},{{C}_{6}}{{H}_{5}}C{{H}_{3}}\,mixture$

D) ${{C}_{2}}{{H}_{5}}I,{{C}_{2}}{{H}_{5}}OH\,mixture$

• question_answer111) "The relative lowering of vapour pressure is equal to the mole fraction of the solute." This law is called

A) Henry's law

B) Raoult's law

C) Ostwald's law

D) Arrhenius's law

• question_answer112) The order of osmotic pressures of equimolar solutions of $BaC{{l}_{2}},$$~NaCl$ and glucose will be

A) $BaC{{l}_{2}}>NaCl>glucose$

B) $NaCl>BaC{{l}_{2}}>glucose$

C) $glucose>BaC{{l}_{2}}>NaCl$

D) $glucose>NaCl>BaC{{l}_{2}}$

• question_answer113) Molal depression constant for water is${{1.86}^{o}}C$ The freezing point of a $0.05$molal solution of a non-electrolyte in water, is

A) $-{{1.86}^{o}}C$

B) $-{{0.93}^{o}}C$

C) $-{{0.093}^{o}}C~$

D) ${{0.93}^{o}}C$

• question_answer114) How many mL of $1M$ ${{H}_{2}}S{{O}_{4}}$ is required to neutralise $10\text{ }mL$of $1M$ $NaOH$solution?

A) $2.5$

B) $5.0$

C) $10.0$

D) $20.0$

• question_answer115) The correct statement in the following is

A) The ionic crystal of $AgBr$has Schottky defect

B) The unit cell having crystal parameters, $a=b\ne c,$ $\alpha =\beta ={{90}^{o}},$ $\gamma ={{120}^{o}}$is hexagonal

C) In ionic compounds having Frenkel defect, the ratio ${{r}_{+}}/{{r}_{-}}$ is high

D) The coordination number of $N{{a}^{+}}$ ion in $NaCl$is 4

• question_answer116) The number of atoms in unit cell of $NaCl$crystal is

A) $2$

B) $4$

C) $6$

D) $8$

• question_answer117) The average life period of a radioactive element is reciprocal of its

A) half-life period

B) disintegration constant

C) number of atoms present at any time

D) number of neutrons

• question_answer118) Uranium ultimately decays into a stable isotope of

B) carbon

D) neptunium

• question_answer119) An isotope $_{Y}^{X}A$ undergoes a series of m alpha and n beta disintegration to form a stable isotope$_{Y-10}^{X-32}B$. The values of m and n are respectively

A) $6$ and $8$

B) $8$ and $10$

C) $5$ and $8$

D) $8$ and $6$

• question_answer120) A substance used as a moderator in a nuclear reactor is

B) uranium-235

D) heavy water

• question_answer121) For which one of the following reactions${{K}_{p}}={{K}_{c}}$?

A) ${{N}_{2}}+3{{H}_{2}}\rightleftharpoons 2N{{H}_{3}}$

B) ${{N}_{2}}+{{O}_{2}}\rightleftharpoons 2NO$

C) $PC{{l}_{5}}\rightleftharpoons PC{{l}_{3}}+C{{l}_{2}}$

D) $2S{{O}_{3}}\rightleftharpoons 2S{{O}_{2}}+{{O}_{2}}$

• question_answer122) The equilibrium constant for the reversible reaction, ${{N}_{2}}+3{{H}_{2}}\rightleftharpoons 2N{{H}_{3}}$ is K and for the reaction $\frac{1}{2}{{N}_{2}}+\frac{3}{2}{{H}_{2}}\rightleftharpoons N{{H}_{3}},$ the equilibrium constant is $K'$. K and $K'$ will be related as

A) $K=K'$

B) $K=\sqrt{K}$

C) $K=\sqrt{K'}$

D) $K\times K'=1$

• question_answer123) At ${{20}^{o}}C$the $A{{g}^{+}}$ ion concentration in a saturated solution of $A{{g}_{2}}Cr{{O}_{4}}$ is $1.5\times {{10}^{-4}}mol/L$. At ${{20}^{o}}C$the solubility product of $A{{g}_{2}}Cr{{O}_{4}}$ would be

A) $3.3750\times {{10}^{-12}}~$

B) $1.6875\times {{10}^{-10}}$

C) $1.6875\times {{10}^{-12}}$

D) $1.6875\times {{10}^{-11}}$

• question_answer124) What will be the pH of a ${{10}^{-8}}M$$HCl$ solution?

A) $8.0$

B) $7.0$

C) $6.98$

D) $14.0$

• question_answer125) Which of the following can act both as Bronsted acid and a Bronsted base?

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

B) $O{{H}^{-}}$

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

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

• question_answer126) What will be the sum of pH and pOH in an aqueous solution?

A) $7$

B) $p{{K}_{w}}$

C) Zero

D) $1$

• question_answer127) Given that the dissociation constant for ${{H}_{2}}O$ is ${{K}_{w}}=1\times {{10}^{-14}}$ what is the pH of a M $KOH$ solution?

A) $11$

B) $3$

C) $14$

D) ${{10}^{-11}}$

• question_answer128) The relation between $\Delta G$ and E for cell is $\Delta G=-nFE;$ the cell reaction will be spontaneous, if

A) G is negative

B) G is positive

C) E is negative

D) E is positive

A) $Q=0$

B) $Q=-W$

C) $Q=+W$

D) $p\,\Delta V=0$where Q, W, p and AV denote heat, work, pressure and change in volume respectively.

• question_answer130) Decrease of free energy of a reacting system points to a/an

A) exothermic reaction

B) equilibrium reaction

C) spontaneous reaction

D) isothermal reaction

• question_answer131) When a solid is converted into liquid, entropy

A) becomes zero

B) remains the same

C) decreases

D) increases

• question_answer132) Carbon and carbon monoxide bum in oxygen to form carbon dioxide according to the following reactions $C+{{O}_{2}}\xrightarrow{{}}C{{O}_{2}};$ $\Delta H=-394\,kJ\,mo{{l}^{-1}}$ $2CO+{{O}_{2}}\xrightarrow{{}}2C{{O}_{2}};$ $\Delta H=-569\,kJ\,mo{{l}^{-1}}$ The heat of formation of $1\text{ }mole$of monoxide is, thus

A) $-219.0\text{ }kJ\text{ }mo{{l}^{-1}}$

B) $-109.5\text{ }kJ\text{ }mo{{l}^{-1}}$

C) $-175.0\text{ }kJ\text{ }mo{{l}^{-1}}$

D) $-87.5\text{ }kJ\text{ }mo{{l}^{-1}}$

• question_answer133) The thermal decomposition of a compound is of first order. If a sample of the compound decomposes 50% in 120 min, in what time will it undergo 90% decomposition?

A) $Nearly\text{ }240\text{ }min$

B) $Nearly\text{ }480\text{ }min$

C) $Nearly\text{ }450\text{ }min$

D) $Nearly\text{ }400\text{ }min$

• question_answer134) The order of a reaction with rate equal to $kC_{A}^{3/2}C_{B}^{-1/2},$ is

A) $2$

B) $1$

C) $-\frac{1}{2}$

D) $\frac{3}{2}$

• question_answer135) The unit of cell constant is

A) $oh{{m}^{-1}}\,c{{m}^{-1}}$

B) $ohm\text{ }cm$

C) $cm~$

D) $cm{{~}^{-1}}$

• question_answer136) The chemical reaction taking place at he anode of a cell is

A) ionisation

B) reduction

C) oxidation

D) hydrolysis

• question_answer137) In dry cell, the reaction which takes place at the graphite anode is

A) $Z{{n}^{2+}}+2{{e}^{-}}\xrightarrow{{}}Zn(s)$

B) $Zn(s)+2{{e}^{-}}\xrightarrow{{}}Zn(s)$

C) $M{{n}^{2+}}+2{{e}^{-}}\xrightarrow{{}}Mn(s)$

D) $Mn(s)\xrightarrow{{}}M{{n}^{+}}+{{e}^{-}}1.5V$

• question_answer138) The metal which gives hydrogen on treatment with acid as well as sodium hydroxide is

A) iron

B) zinc

C) copper

D) None of these

A) fluorine from $NaF$

B) iodine from $NaI$

C) bromine from $NaBr$

D) None of the above

• question_answer140) Milk is an example of

A) emulsion

B) suspension

C) sol

D) gel

• question_answer141) Fog is a colloidal system of

A) gas in liquid

B) liquid in gas

C) gas in gas

D) solid in gas

• question_answer142) In physical adsorption, the gas molecules are held on solid surface by

A) chemical forces

B) electrostatic forces

C) gravitational forces

D) van der Waals' forces

• question_answer143) Hoope's process is used in the refining of

A) $Al$

B) $Zn$

C) $Ag$

D) $Cu$

A) $P{{b}_{3}}{{O}_{4}}$

B) $PbO$

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

D) $P{{b}_{4}}{{O}_{3}}$

A) $Pb\text{ + }Sb$

B) $Pb+Sn$

C) $Cu+Sn$

D) $Cu+Zn$

• question_answer146) In the manufacture of iron from hematite the function of lime stone is as

A) reducing agent

B) flux

C) slag

D) gangue

A) pure copper

B) copper ore

C) 2% impure copper

D) copper alloy

• question_answer148) The purest from of iron is

A) cast iron

B) pig iron

C) wrought iron

D) steel

• question_answer149) Who developed the long form of periodic table?

A) Lothar Meyer

B) Neils Bohr

C) Mendeleef

D) Moseley

• question_answer150) The correct sequence of elements in decreasing order of first ionisation energy is

A) $Na>Mg>Al~$

B) $Mg>Na>Al$

C) $Al>Mg>Na~$

D) $Mg>Al>Na$

• question_answer151) Which of the following statements is correct?

A) ${{X}^{-}}$ ion is larger in size than X atom

B) ${{X}^{+}}$ ion is larger in size than X atom

C) ${{X}^{+}}$ ion is larger in size than ${{X}^{-}}$ ion

D) ${{X}^{+}}$ and ${{X}^{-}}$ ions are equal in size

• question_answer152) The correct order of electron affinity of B, C, N, O is

A) $O>C>N>B$

B) $B>N>C>O$

C) $\text{O}>C>B>N$

D) $\text{O}>B>C>N$

• question_answer153) The ionic radius of which of the following would be maximum?

A) ${{C}^{4-}}$

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

C) ${{O}^{2-}}$

D) $M{{g}^{2+}}$

• question_answer154) The atomic radius of elements of which of the following series would be nearly the same?

A) $Na,K,Rb,Cs$

B) $Li,Be,B,C$

C) $Fe,Co,Ni,Cu~$

D) $F,Cl,Br,I$

A) ionisation energy

C) boiling point

D) density

• question_answer156) Monazite is a source of

A) $Ne$

B) $Ra$

C) $Kr$

D) $Th$

• question_answer157) Which forms coloured ion?

A) Metalloids

B) Non-metals

C) p-block elements

D) Transition elements

A) $F{{e}_{4}}{{[Fe{{(CN)}_{6}}]}_{3}}$

B) $F{{e}_{2}}[Fe{{(CN)}_{6}}]$

C) $F{{e}_{3}}[Fe{{(CN)}_{6}}]$

D) $Fe{{[Fe{{(CN)}_{6}}]}_{2}}$

• question_answer159) The highest oxidation state is shown by that transition element which has outermost configuration as

A) ${{d}^{3}}{{s}^{2}}$

B) ${{d}^{5}}{{s}^{1}}$

C) ${{d}^{5}}{{s}^{2}}$

D) ${{d}^{8}}{{s}^{2}}$

• question_answer160) Which of the following oxides is white but becomes yellow on heating?

A) $AgO$

B) $A{{g}_{2}}O$

C) $FeO$

D) $ZnO$

• question_answer161) Which of the following ions gives coloured solution?

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

B) $Z{{n}^{2+}}$

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

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

• question_answer162) On heating $Mn{{(OH)}_{2}}$ with $Pb{{O}_{2}}$and cone. $HN{{O}_{3}}$ pink colour is obtained due to the formation of

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

B) $HMn{{O}_{4}}$

C) $Pb{{(Mn{{O}_{4}})}_{2}}$

D) $PbMn{{O}_{4}}$

• question_answer163) On the basis of Le-Chatelier's principle, predict which of the following conditions would be unfavorable for the formation of $S{{O}_{3}}$? Given that: $2S{{O}_{2}}+{{O}_{2}}\rightleftharpoons 2S{{O}_{3}}\,\,\Delta H=-42kcal$

A) Low temperature

B) High pressure

C) High temperature

D) High concentration of $S{{O}_{2}}$

• question_answer164) An element $(X)$ forms compounds of the formulae $XC{{l}_{3}},$ ${{X}_{2}}{{O}_{5}}$ and $C{{a}_{3}}{{X}_{2}}$ but does not form $XC{{l}_{5}}$. Which of the following is the element X?

A) $B$

B) $Al$

C) $N$

D) $P$

• question_answer165) Which of the following oxides of nitrogen reacts with ferrous sulphate to form a dark brown compound?

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

B) $NO$

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

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

• question_answer166) Which of the following halogens does not form oxyacid?

A) Fluorine

B) Chlorine

C) Bromine

D) Iodine

• question_answer167) The strongest of the following acids, is

A) $HBr$

B) $HCl$

C) $HF$

D) $HI$

A) $KHg{{I}_{4}}$

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_answer169) Helium is used with oxygen in the apparatus of divers because it

A) is lighter than nitrogen

B) is not soluble in blood at high pressure

C) is easily available

D) is less reactive than nitrogen

• question_answer170) Which of the following is a favourable facer ' for cation formation?

A) Low ionisation potential

B) High electron affinity

C) High electronegativity

D) Small atomic size

• question_answer171) Very dilute nitric add reacts with zinc to far- zinc nitrate and

A) amonium nitrate

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

C) $NO$

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

• question_answer172) Unlike other halogens, fluorine does not show higher oxidation states, because

A) it is highly electronegative

B) it has no d-orbitals

C) its atomic radius is very small

D) The ${{F}^{-}}$ ion is stable and isoelectronic with neon

• question_answer173) Which of the following hydrides has the lowest boiling point?

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

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

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

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

• question_answer174) The number of isomers possible for square planar complex ${{K}_{2}}[PdClB{{r}_{2}}(SCN)]$ is

A) $2$

B) $3$

C) $4$

D) $6$

• question_answer175) IUPAC name of $[Co{{(N{{H}_{3}})}_{3}}({{H}_{2}}O)Cl]C{{l}_{2}}$is

A) Diaquachlorodiaminecobalt (III) chloride

B) Triaminediaquachlorocobalt (III) chloride

C) Chlorodiaminediaquacobalt (II) chloride

D) Diaminediaquachlorocobalt (II) chloride

• question_answer176) Which of the following exhibits highest molar conductivity?

A) $[Co{{(N{{H}_{3}})}_{6}}]C{{l}_{3}}$

B) $[Co{{(N{{H}_{3}})}_{5}}Cl]C{{l}_{2}}$

C) $[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]Cl$

D) $[Co{{(N{{H}_{3}})}_{3}}C{{l}_{3}}]$

• question_answer177) In tris (ethylene diamine) cobalt (III) chloride the coordination number of cobalt is

A) $3$

B) $4$

C) $6$

D) $7$

• question_answer178) The ion that can be precipitated by $HCl$ as well as ${{H}_{2}}S$ is

A) $P{{b}^{2+}}$

B) $F{{e}^{3+}}$

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

D) $C{{u}^{2+}}$

• question_answer179) A salt on treatment with dil. $HCl$ give: pungent smelling gas and a yellow precipitate The salt gives green flame when tested. The salt solution gives a yellow precipitate with potassium chromate. The salt is

A) $NiS{{O}_{4}}$

B) $Ba{{S}_{2}}{{O}_{3}}$

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

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

• question_answer180) Which of the following is not used as an explosive?

A) Trinitrotoluene

B) Trinitrobenzene

C) Picric acid

D) Nitrobenzene

• question_answer181) Which of the following will have geometrical isomers?

A) 2-methylpropene

B) 2-butene

C) 1-butene

D) Propene

• question_answer182) Which statement is true for cyclohexane?

A) It has two possible isomers

B) It has three conformations

C) Boat conformation is most stable

D) Chair and boat conformations differ in energy by $44\text{ }kJ/mol$

• question_answer183) A hydrocarbon has $C\text{ }85.72%$and remaining H. The hydrocarbon is

A) ${{C}_{2}}{{H}_{4}}$

B) ${{C}_{2}}{{H}_{6}}$

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

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

• question_answer184) Which of the following has highest octane number?

A) n-hexane

B) n-heptane

C) iso-octane

D) n-heptane and iso-octane mixed in ratio $50:50$

• question_answer185) Which of the following is obtained at lowest temperature by fractional distillation of petroleum?

A) Ligroin

B) Gasoline

C) Kerosene

D) Diesel oil

• question_answer186) The order of stability of carbonium ions is

A) $methyl>ethyl>iso-propyl>tert-butyl$

B) $tert-butyl>iso-propyl>ethyl>methyl$

C) $iso-propyl>tert-butyl>ethyl>methyl$

D) $tert-butyl>ethyl>iso-propyl>methyl$

• question_answer187) The compound which gives only acetaldehyde on ozonolysis is

A) butene-1

B) butene-2

C) ethylene

D) propylene

• question_answer188) Which of the following is used to distinguish ethylene and acetylene?

A) Alkaline $KMn{{O}_{4}}$

B) Bromine water

C) Ammoniacal cuprous chloride

D) Conc.${{H}_{2}}S{{O}_{4}}$

• question_answer189) Carbons in the compound l-butene-3-yne are

A) $sp$ hybridized

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

C) $sp$ and $s{{p}^{2}}$ hybridized

D) $sp,$ $s{{p}^{2}}$and $s{{p}^{3}}$hybridized

• question_answer190) In nitration of benzene with cone. $HN{{O}_{3}}$ and cone. ${{H}_{2}}S{{O}_{4}},$ the species which takes active part is

A) nitrite ion

B) nitrate ion

C) nitroniumion

D) nitrogen peroxide

• question_answer191) Ethyl bromide on treatment with alcoholic $KOH$ gives

A) ethylene

B) ethanol

C) acetic acid

D) ethane

• question_answer192) $AgN{{O}_{3}}$ does not give precipitate with chloroform because

A) $CHC{{1}_{3}}$is insoluble in water

B) $CHC{{1}_{3}}$does not ionise in water

C) $CHC{{1}_{3}}$ is an organic compound

D) $AgN{{O}_{3}}$is insoluble in $CHC{{1}_{3}}$

• question_answer193) Benzene reacts with chlorine to form benzene hex chloride in presence of

A) nickel

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

C) bright sunlight

D) zinc

• question_answer194) Which of the following compounds gives a ketone with Grignard reagent?

A) Formaldehyde

B) Ethyl alcohol

C) Methyl cyanide

D) Methyl iodide

• question_answer195) Which one of the following compounds gives a positive iodofonn test?

A) Pentanal

B) 1-phenyl ethanol

C) 2-phenyl ethanol

D) 3-pentanol

• question_answer196) Reaction of acetaldehyde with $HCN$ followed by hydrolysis gives a compound which shows

A) optical isomerism

B) geometrical isomerism

C) metamerism

D) tautomerism

• question_answer197) A compound A has a molecular formula ${{C}_{2}}C{{l}_{3}}OH$. It reduces Fehling solution and on oxidation gives a monocarboxylic acid .A is obtained by action of chlorine on ethyl alcohol. A is

A) chloral

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

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

D) chloroacetic acid

• question_answer198) Which of the following is not a synthetic polymer?

A) Polyethylene

B) PVC

C) Nylon

D) Cellophane

• question_answer199) Iodine value is related to

A) fats and oils

B) alcohols

C) esters

D) hydrocarbons

• question_answer200) Deficiency of which vitamin causes rickets?

A) Vitamin C

B) Vitamin D

C) Vitamin A

D) Vitamin K

• question_answer201) Epithelial tissue serves as

A) protective sheath

B) reproductive structures

C) corpuscle

D) nerve cells

• question_answer202) Muscular tissue is differentiated into

A) unstriped, striped

B) striped, cardiac

C) unstriped, cardiac muscle

D) unstriped, striated and cardiac

• question_answer203) The units of the nervous system are

A) neurons

B) dendrites

C) axon

D) cyton

• question_answer204) The hardest substance of vertebrate body is

A) keratin

B) enamel

C) dentine

D) chondrin

• question_answer205) Role of bone marrow in mammals is

A) to assist kidneys

B) to act as haemopoietic tissue

C) to assist liver

D) to control blood pressure

• question_answer206) Which of these contains vocal cords?

A) Pharynx

B) Larynx

C) Glottis

D) Bronchial tube

• question_answer207) Which of the following glands is present in frog's skin and not in rabbit's skin?

A) Sebaceous gland

B) Sweat gland

C) Mucous gland

D) Moll's gland

• question_answer208) How many kinds of cells are found in islets of Langerhans?

A) 1

B) 2

C) 3

D) 4

• question_answer209) Which type of cells secretes $\text{HCl}$ in stomach'

A) Chief cells

B) Oxyntic cells

C) Peneth cells

D) Goblet cells

• question_answer210) The pungent odour of faeces is due to ne presence of

A) indole and skatole

B) skatole only

C) phenol and hydrogen sulphide

D) All of the above

• question_answer211) Which one of the following enzymes initials protein digestion?

A) Amino peptidase

B) Carboxy peptidase

C) Trypsin

D) Pepsin

• question_answer212) Haemoglobin is having maximum affinity with

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

B) CO

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

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

• question_answer213) In our body, the blood bank is

A) red bone marrow

B) spleen

C) liver

D) heart

A) autosomal abnormality

B) sex chromosomal abnormality

D) None of the above

A) epicardium

B) myocardium

C) endocardium

D) All of these

• question_answer216) Carbonic anhydrase is present in high concentrations in

A) plasma

B) erythrocytes

C) leucocytes

D) nephrons

• question_answer217) How many molecules of oxygen can bound to one molecule of haemoglobin?

A) 1

B) 2

C) 3

D) 4

• question_answer218) Why do we pass more urine in wet and cold season?

A) Impairment of water absorption by nephrons

B) Kidney becomes more active

C) Sweating is much reduced

• question_answer219) What for the ascending limb of loop of Henie is permeable?

A) Glucose

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

C) Na

D) Water

• question_answer220) Which is the correct explanatory word for the composition of protoplasm?

A) Emulsion

B) Suspension

C) Complex colloidal solution

D) Molecular solution

• question_answer221) Which part of mammalian brain controls the muscular co-ordination?

A) Cerebrum

B) Cerebellum

C) Corpus callosum

D) Medulla

• question_answer222) Name of nervous band connecting cerebral hemispheres in rabbit is

A) corpus callosum

B) corpus albicans

C) corpus striatum

D) corpus spongiosum

• question_answer223) Lateral ventricles are found in

A) heart

B) brain

C) thyroid

D) Both [a] and [b]

• question_answer224) In which bee barbless sting is found?

A) Drones

B) Workers

C) Queen bee

D) All of these

• question_answer225) When are the identical twins born?

A) One sperm fertilizes two ova

B) One ovum is fertilized by two sperms

C) Two ova are fertilized by two sperms

D) One fertilized ovum divides into two blastomeres and both of them separate

• question_answer226) One mole glucose, on complete oxidation, yields energy

A) 686 cal

B) 68,600 cal

C) 6,86,000 cal

D) 68,60,000 cal

• question_answer227) The points of sperm entry during fertilization forms

A) centre of rotation of embryo

B) axis of cleavage

C) grey crescent

D) dorsal lip of blastopore

• question_answer228) Seminiferous tubules are found in

A) testis

B) ovary

C) kidney

D) lung

• question_answer229) Corpus luteum is formed in

A) ovary

B) testis

C) mammary gland

D) uterus

A) proximal part of oviduct

B) uterus part

D) ureter part

A) multiplication phase

B) growth phase

C) maturation phase

D) All of the above

• question_answer232) Acrosome is found in the sperm at

A) top part

B) middle piece

C) behind the nucleus

D) tail part

• question_answer233) In mammals, the number of cervical vertebra is

A) 5

B) 7

C) 10

D) 12

A) dentaries

B) maxilla

C) premaxilla

D) palatine

• question_answer235) In mammals, each half of pectoral girdle consists of

A) supra scapula

B) scapula

C) coracoid

D) All of these

• question_answer236) In mammals, each half of pelvic girdle consists of

A) ilium

B) ischium

C) pubis

D) All of these

• question_answer237) Ear drum is known as

A) tympanic membrane

B) tensor tympani

C) scala tympani

D) scala vestibule

• question_answer238) Function of lacrimal glands is

A) to secrete mucous

B) to secrete tears

C) to secrete oil

D) to secrete fat

• question_answer239) Life saving hormone is secreted by which gland?

B) Hypothalamus

C) Pituitary gland

D) Thyroid gland

• question_answer240) The disease caused by deficiency of iodine is

A) cretinism

B) myxedema

C) goitre

D) tetany

• question_answer241) The disease caused by deficiency of parathormone is

A) cretinism

B) tetany

C) hypercalemia

D) myxoedema

• question_answer242) Cretinism is due to less secretion of

A) thyroid gland

B) pituitary gland

C) parathyroid gland

• question_answer243) Which endocrine gland becomes inactive in old age?

B) pineal

C) thymus

D) pituitary

• question_answer244) In males, the essential hormone for secondary sexual characteristics is

A) testosterone

B) progesterone

C) estrogen

D) relaxin

• question_answer245) In females, the essential hormone for secondary sexual characteristics is

A) testosterone

B) progesterone

C) estrogen

D) relaxin

• question_answer246) Pellagra disease is caused due to deficiency of vitamin

A) B

B) C

C) D

D) E

• question_answer247) Submucosa is thickest in

A) stomach

B) oesophagus

C) intestine

D) rectum

• question_answer248) Mineral deposition in bones and teeth is due to vitamin

A) D

B) A

C) C

D) E

• question_answer249) Which is the urinary bladder of the child placed in the womb?

B) Amnion

C) Allantois

D) Liver

• question_answer250) What is the cause of haemophilia?

A) Chromosomal aberration

B) Somatic mutation

D) All of the above

• question_answer251) The term blastocyst is applied to the blastula of which one of the following?

A) Kangaroo

B) Platypus

C) Monkey

D) Both [a] and [c]

• question_answer252) The outer layer of the blastocyst which forms the ectoderm, is called

A) cnidoblast

B) germinal vesicle

C) trophoblast

D) amnion

• question_answer253) The foetal membrane, which is the source of first blood corpuscle to enter the circulation the embryo, is called

A) amnion

B) chorion

C) trophoblast

D) yolk sac

• question_answer254) Growth in most warm blooded vertebrates is

A) determinate

B) indeterminate

C) uncontrolled

D) None of the above

• question_answer255) The ability of animals to regenerate the lost parts of the body was reported by

A) Carlson

B) Trembley

C) Patten

D) Storer

• question_answer256) Improvement of genetic characters and present day generation on the basis of best nutrition and training is called

A) Eugenics

B) Euphenics

C) Euthenics

D) Gerontology

• question_answer257) The 'Cell theory" states that

A) all cells have nuclei

B) cells are the fundamental structural mat of plants and animals

C) all cells are living

D) cells reproduce by mitosis and meiosis

• question_answer258) Structure present over the chromosomes is

A) nucleolus

B) centromere

C) centrosome

D) Golgi complex

• question_answer259) Normally the number of chromosomes in the nuclei of gametes that fuse at fertilization are

A) innumerable

B) dissimilar

C) similar

D) None of these

• question_answer260) Balbiani discovered special type of chromosome from the salivary gland of Chironomus larva, which are recognized by the presence of

A) bands

B) loops

C) Both [a] and [b]

D) All of these

• question_answer261) The technique which makes use of amniotic fluid for the detection of foetal disorders, is called as

A) endoscopy

B) laproscopy

C) natal endoscopy

D) amniocentesis

• question_answer262) Which of the following is not related to chromosomal aberration?

A) Euploidy

B) AIDS

C) Aneuploidy

D) Klinefelter's syndrome

• question_answer263) Immediately after ovulation, the mammalian egg is covered by an outermost membrane, called as

A) vitelline membrane

B) chorion

C) zona pellucid

• question_answer264) The number of autosomes in man is

A) 22 pairs

B) 11 pairs

C) 43 pairs

D) 23 pairs

• question_answer265) Supermale and super female type determination of sex in Drosophila is base on

A) genie balance

B) oxygen balance

C) biodiversity

D) uniformity

• question_answer266) A girl of normal vision whose father was colourblind marries a man of normal vision whose father was also colourblind. Their sons would be (of total number of sons).

A) all colourblind

B) 50% colourblind

C) all normal

D) 25% colourblind

• question_answer267) Marriage between one of the following pairs may cause child death

A) $R{{h}^{+}}$ father and $R{{h}^{-}}$mother

B) $K{{h}^{+}}$ father and $R{{h}^{+}}$mother

C) $R{{h}^{-}}$ father and $R{{h}^{-}}$ mother

D) $R{{h}^{-}}$ father and $R{{h}^{+}}$mother

• question_answer268) Donors and recipients in a blood transfusion process can be

A) only father and son

B) only brother and sister

C) only maternal uncle and niece

D) All of the above

• question_answer269) Which one of the following is not a mutagen?

A) Acetic acid

B) Hydroxylamine

C) Nitrous acid

D) Gamma rays

• question_answer270) The enzyme which can cut molecules of DNA into segments is known as

A) DNA polymerase

B) DNA ligase

C) Restriction enzyme

D) DNA gyrase

• question_answer271) Point mutation is a change, which involves

A) loss of a gene

C) deletion of a segment of a gene

D) change in a base of a gene

• question_answer272) The percentage ratio of natality over mortality is called

A) vital index

B) population density

C) total count of individuals

D) fertility rate

A) Spider

B) Scorpion

C) Centipede

D) Crab

• question_answer274) Electric organs are found in

A) sharks

B) porpoises

C) goldfish

D) rays

• question_answer275) Which monkey has prehensile tail?

A) Spider monkey

B) Semnopithecus

C) Rhesus monkey

D) Boinnet monkey

• question_answer276) Which of the following is in tracheate group?

A) Crab-centipede-cockroach

B) King Crab-scorpion-housefly

C) Spider-Peripatus-mosquito

D) Bedbug-sandfly-silkworm

• question_answer277) Which is filter feeder?

A) Amoeba

B) Leech

C) Spider

D) Paramedum

• question_answer278) Whose skin colour does not change?

A) Chamaeleon

B) Horse

C) Garden lizard

D) Both [a] and [b]

A) life history of animals

B) group of phyla

C) evolutionary history of a species from its ancestors

D) castes of flies

• question_answer280) Which one of the following scientists is not related with organic evolution?

A) Erasmus Darwin

B) Charles Darwin

C) Darlington

D) TR Malthus

• question_answer281) Modemtheory of organic evolution is based on

A) population

B) mutation

C) isolation

D) All of these

• question_answer282) A vestigial organ of man is

A) vermiform appendix

B) sebaceous gland

C) pelvic girdle

D) mammary gland

• question_answer283) The wings of an insect and a bat exhibit

A) homology

B) analogy

C) atavism

• question_answer284) The material for organic evolution is

A) effect of hormones

B) nutritive value

C) mutation

D) asexual reproduction

• question_answer285) The nearest prehistoric ancestor of present man may be

A) Java ape man

B) Cro-magnon man

C) Neanderthal man

D) Peking man

A) fly

B) worm

C) moth

D) beetle

• question_answer287) Who is referred to as father of pearl industry ?

A) Ivanowski

B) Louis Pasteur

C) Kokichi Mikimoto

D) Harvey

• question_answer288) Plasmodium in man is inoculated by

A) Anopheles male

B) Anopheles female

C) Culex female

D) Both [a] and [b]

• question_answer289) 'Malaria', a common disease worldwide, b caused by a

A) bacterium

B) virion

C) Protozoa

D) helminthes

• question_answer290) HIV causes reduction in

A) T-helper cells only

B) All T-cells

C) B-cells only

D) Both [a] and [b]

• question_answer291) Biological name of insect (vector) carrying the plague is

A) Xenopsylla cheopis

B) Anopheles mosquito

C) Bacillus pestis

D) Pediculus humanus

• question_answer292) A molecule that elicites an immune response is called

A) antibody

B) antigen

C) mutagen

D) carcinogen

• question_answer293) Malarial parasite completes its life-cycle in

A) one host

B) two hosts

C) three hosts

D) reservoir host

• question_answer294) Metabolic waste responsible for malaria fever is called

A) haemozoin

B) haematin

C) melanin

D) heparin

• question_answer295) A pearl oyster secretes pearls to

A) regenerate injured parts

B) protect itself against invading parasite

C) harden its mantle cavity

D) isolate damaged tissues of the body

A) caffiene

B) nicotine

C) cocaine

D) histamine

• question_answer297) Which of the following organ is most affected by alcohol?

A) Kidney

B) Heart

C) Liver

D) Lungs

• question_answer298) Kanha National Park is famous for

A) birds

B) rhinoceros

C) tigers

D) crocodiles

• question_answer299) Malathion, parathion and fenitrothion belong to the group of

A) carbamates

B) organophosphates

C) pyrethroids

D) marines

• question_answer300) Which of the following when dissolved in water make (s) Bordeaux mixture?

A) Copper sulphate

B) Calcium oxide

C) Both [a] and [b]

D) None of the above

• question_answer301) The significance of meiosis lies in

A) maintaining constancy in the number of chromosomes in an organism

B) production of genetic variability in the population of species

C) Reduction of the diploid number of chromosomes to haploid

D) All of the above

• question_answer302) Which among the following can be seen only under the electron microscope?

A) Chloroplast

B) Ribosome

C) Leucoplast

D) Nucleus

• question_answer303) The name 'protoplasm' was given by

A) Hooke

B) A K Sharma

C) Schwann

D) Purkinje

• question_answer304) A mature plant cell has

A) cell wall and protoplasm

B) protoplasm and vacuole

C) vacuole and cell wall

D) Both [b] and [c]

• question_answer305) The larger sub-unit in 80S ribosome is

A) 50S

B) 60S

C) 40S

D) 0S

• question_answer306) Golgi bodies are absent in

A) plants

B) bacteria

C) animals

D) eukaryotic cells

• question_answer307) Endoplasmic reticulum is more developed in

A) green cells

B) young cells

C) mature cells

D) bacteriophage

• question_answer308) Mitochondria are related to

A) prokaryotes

B) plasmids

C) plastids

D) viruses

• question_answer309) The main function of lysosomes is

A) digestion

B) replication

C) translation

D) translocation

• question_answer310) The physical basis of life is

A) nucleus

B) sex chromosomes

C) protoplasm

D) DNA

• question_answer311) Which of the following has a single membrane?

A) Ribosome

B) Peroxisome

C) Nucleolus

D) Centrosome

• question_answer312) DNA molecules of each chromosome become double in

A) ${{\text{G}}_{\text{1}}}\text{-}$phase

B) ${{\text{G}}_{2}}\text{-}$phase

C) S-phase

D) M-phase

• question_answer313) L-shaped chromosomes are called

A) sex-chromosome

B) acrocentric

C) telocentric

D) sub-metacentric

• question_answer314) Pairing of homologous chromosomes takes place in

A) pachytene

B) zygotene

C) diplotene

D) None of these

• question_answer315) How many meiotic divisions will be necessary to produce two hundred pollen grains?

A) 100

B) 199

C) 50

D) 200

• question_answer316) Which of the following is a purine ?

A) Prokaryotes

B) Guanine

C) Thymine

D) Uracil

• question_answer317) Which type of ribosomes are found in Nostoc cells?

A) 50S

B) 60S

C) 70S

D) Eukaryotic

• question_answer318) A change in the chromosome number is called

A) chromosomal mutation

B) gene mutation

C) somatic mutation

D) polyploidy

• question_answer319) Who coined the term 'chromosome'?

A) Balbiani

B) Waldeyer

C) Sutton

D) Purkinje

• question_answer320) A chromosome having sub-terminal centromere is called

A) telocentric

B) acrocentric

C) metacentric

D) sub-metacentric

• question_answer321) How many pairs of contrasting characters were chosen by Mendel for his study with garden pea?

A) 3

B) 5

C) 7

D) 14

• question_answer322) The term 'all elomorphic' implies

A) any two characters

B) a pair of contrasting characters

D) a pair of non-contrasting characters

• question_answer323) If a homozygous red flowered plant is crossed with a homozygous white-flowered plant, the offspring will be

A) all red flowered

B) all white flowered

C) half red flowered

D) half white flowered

• question_answer324) An asexually produced organism inheriting all the characters of its parent is called

A) clone

B) offspring

C) hybrid

D) variety

• question_answer325) What would be the colour of flowers in ${{F}_{1}}$ progeny as a result of a cross between homozygous red and homozygous white flowered snapdragon?

A) Red

B) White

C) Both [a] and

D) [d] Pink

• question_answer326) 26. Who postulated the 'chromosomal theory of ${{F}_{1}}$inheritance'?

A) de Vries

B) Mendel

C) Sutton and Boveri

D) Morgan

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

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

C) 1 pair of autosomes and 3 pairs of sex chromosomes

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

• question_answer328) The nature of DNA replication is

A) conservative

B) non-conservative

C) semi-conservative

D) cyanobacteria

• question_answer329) Transformation in bacteria was first discovered by

A) Lederberg

B) Griffith

C) Fimbriae

D) Tatum

• question_answer330) The drug streptomycin inhibits the process of

A) prokaryotic translation

B) eukaryotic translation

C) prokaryotic transcription

D) eukaryotic transcription

• question_answer331) The sexuality in bacteria was established by

A) Lederberg and Tatum

B) H J Muller

C) Hargobind Khorana

D) Ochoa and Kornberg

• question_answer332) The N2 fixing bacterium associated with root nodules of legumes is known as

A) Azotobacter

B) Nitrobacter

C) Lactobacillus

D) Rhizobium

• question_answer333) The filterable property of Tobacco Mosaic Virus (TMV) was shown by

A) Ivanowski

B) Beijerinck

C) Stanley

• question_answer334) The bacteria which convert nitrate on molecular nitrogen are called

A) nitrifying bacteria

B) methanobacteria

C) diazotrophic bacteria

D) denitrifying bacteria

A) herbicide

B) weedicide

C) rodenticide

D) pesticide

• question_answer336) The germ theory of disease was propounded by

A) Koch

B) Pasteur

C) Rayer

D) Devaine

• question_answer337) Interferons are useful in controlling

A) TB

B) cancer

C) malaria

D) blood pressure

• question_answer338) Yeast is used in the formation of

A) ammonia

B) alcohol

C) curd

D) petrol

• question_answer339) Fermentation is represented by equation

A) ${{\text{C}}_{\text{6}}}{{\text{H}}_{\text{12}}}{{\text{O}}_{\text{6}}}\text{+}\,\text{6}{{\text{0}}_{\text{2}}}\to \text{6C}{{\text{O}}_{\text{2}}}\text{+}\,\text{6}{{\text{H}}_{\text{2}}}\text{+}\,\text{673}\,\text{kcal}$

B) ${{\text{C}}_{\text{6}}}{{\text{H}}_{\text{12}}}{{\text{O}}_{\text{6}}}\xrightarrow{{}}\text{2}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}\text{OH+}\,\text{2C}{{\text{O}}_{\text{2}}}\text{+}21\,\text{kcal}$

C) $6C{{O}_{2}}+12{{H}_{2}}O\to {{\text{C}}_{6}}{{\text{H}}_{12}}{{\text{O}}_{\text{2}}}+{{60}_{2}}\,$

D) $\text{6C}{{\text{O}}_{\text{2}}}\text{+6}{{\text{H}}_{\text{2}}}\text{O}\frac{\text{Light}}{\text{Chlorophyll}}{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{12}}}{{\text{O}}_{\text{6}}}\text{+6}{{\text{0}}_{\text{2}}}\,$

A) yeast

B) Mucor

C) bacteria

D) virus

A) only DNA

B) only RNA

C) either DNA or RNA

D) Both [a] and [b]

• question_answer342) The nitrogen fixation by Nostoc takes place in

A) vegetative cells

B) akinetes

C) heterocysts

D) hormogonia

• question_answer343) The smallest free-living organism is

A) virus

B) mycoplasma

C) cyanobacteria

D) bacteria

• question_answer344) The bacterium capable of anaerobic N2 fixation is known as

A) Clostridium

B) Bacillus

C) Azotobacter

D) Khizobium

A) cyanobacteria

B) bacteria

C) fungi

D) lichens

• question_answer346) The bacterial genome contains

A) DNA and histone

B) DNA or histone

C) DNA without histone

D) Neither DNA nor histone

• question_answer347) Which one of the following statements is correct?

A) Viruses are obligate parasites

B) All fungi are pathogenic

C) All algae are eukaryotic

D) Bacteria are always harmful to mankind

• question_answer348) The characteristic pigment of cyanobacteria is

A) fucoxanthin

B) chl-b

C) anthocyanin

D) phycocyanin

• question_answer349) An antiviral chemical produced by the animal cell is

A) virion

B) interferon

C) represser protein

D) hormone

• question_answer350) The division of the plant kingdom into Prokaryota and Eukaryota is based on the character of

A) nucleus only

B) chromosomes only

C) cell organelles only

D) All of the above

• question_answer351) Who is credited with the introduction of binomial system of nomenclature of plants?

A) Linnaeus

B) John Ray

C) Bentham and Hooker

D) Aristotle

• question_answer352) Sexual reproduction in Spirogyra is morpho logically characterized by

A) oogamy

B) anisogamy

C) isogamy

D) Both [a] and [b]

• question_answer353) The moss plants develop from

A) diploid spores

B) protonema

C) oospores

D) antherozoids

• question_answer354) Zygospores are formed in?

A) Puccinia

B) Penidllium

C) Altemaria

D) Mucor

• question_answer355) Fern plant is a

A) haploid gametophyte

B) diploid gametophyte

C) diploid sporophyte

D) haploid sporophyte

• question_answer356) How much time is generally required/taken by the pine plant from pollination to fertilization?

A) Four months

B) Twelve months

C) Two years

D) Four years

• question_answer357) Pyrenoids are characteristically found in the chloroplast of

A) fungi

B) algae

C) pteridophytes

D) angiosperms

• question_answer358) Caruncle is formed by

A) peduncle

B) cotyledons

C) integument

D) None of these

A) outer part of endosperm

B) destroyed synergids

C) destroyed secondary nucleus

D) remains of nucellus

• question_answer360) In pea, the ovule is

A) hemianatropous

B) amphitropous

C) anatropous

D) campylotropous

• question_answer361) The point where funicle joins with ovule is known as

A) chalaza

B) hilum

C) integument

D) micropyle

• question_answer362) Aerenchyma is formed in the tissue of

A) sclerenchyma

B) parenchyma

C) phloem

D) None of these

• question_answer363) Promeristem gives rise to which meristem?

A) Secondary

B) Lateral

C) Primary

D) Apical

• question_answer364) Whose living cells provide tensile and mechanical strength?

A) Collenchyma

B) Sclerenchyma

C) Phloem

D) Sclereids

• question_answer365) Which one is not related with plant ash?

A) Trace elements

B) Essential elements

C) Nitrogen

D) Mineral elements

• question_answer366) 0.1 M solution of a solute has a water potential of

A) - 2.3 bars

B) zero bar

C) 22.4 bars

D) + 2.3 bars

• question_answer367) A small mesophytic twig with green leaves is dipped into water in a big beaker under sunlight. It demonstrates

A) photosynthesis

B) respiration

C) transpiration

D) None of these

• question_answer368) Which one is not related to transpiration

A) Regulation of plant body temperature

B) Absorption and distribution of mineral salts

C) Circulation of water

D) Bleeding

• question_answer369) Which element is essential for photolysis of water?

A) Nitrogen

B) Chlorine

C) Carbon

D) Oxygen

• question_answer370) In ${{C}_{4}}$ plants, initial $C{{O}_{2}}$ fixation takes place in the chloroplasts of

A) guard cells

B) spongy mesophyll

D) bundle sheath

• question_answer371) Which of the following is formed during respiration?

A) ${{O}_{2}}$ (oxygen)

B) $C{{O}_{2}}$ (carbon dioxide)

C) $N{{O}_{2}}$ (nitrogen dioxide)

D) $S{{O}_{2}}$ (sulphur dioxide)

• question_answer372) The pyruvic acid formed in glycolysis is oxidized to $C{{O}_{2}}$ and ${{H}_{2}}O$ in a cycle called

A) Calvin cycle

B) Hill reaction

C) Krebs cycle

D) Nitrogen cycle

• question_answer373) Nitrogenase enzyme is found in Nostoc in the cell of

A) vegetative

B) heterocyst

C) Both [a] and [b]

D) None of these

• question_answer374) Many of the hydrolytic reactions are

A) reversible

B) irreversible

C) endothermic

D) exothermic

• question_answer375) Most of the plants are seasonal due to

A) photoperiodism

B) phototropism

C) photosynthesis

D) photolysis

• question_answer376) Certain chemical sbstances having profound effect on growth are called

A) catalytic agents

B) phytohormones

C) enzymes

D) compost

• question_answer377) The pyramid of energy in a forest ecosystem is

A) always upright

B) always inverted

C) Both [a] and [b]

D) None of these

• question_answer378) The importance of ecosystem lies in

A) flow of energy

B) cycling of materials

C) Both [a] and [b]

D) None of the above

• question_answer379) Which one of the following is a renewable source of energy?

A) Petroleum

B) Coal

C) Nuclear fuel

D) Trees

• question_answer380) The correct path of energy flow in an ecosystem is

A) Producers $\to$Carnivores$\to$ Herbivores $\to$ Decomposers

B) Producers$\to$Herbivores $\to$Carnivores$\to$Decomposers

C) Herbivores $\to$Carnivores$\to$ Producers $\to$ Decomposers

D) Herbivores $\to$ Producers $\to$ Carnivores$\to$ Decomposers

• question_answer381) The number of primary producers within a specified area would be maximum in

A) grassland ecosystem

B) forest ecosystem

C) pond ecosystem

D) deserts

• question_answer382) A food chain starts with

A) nitrogen fixationing organisms

B) photosynthesizing organisms

C) respiration

D) decomposers

A) primary producer

B) consumer

C) Both [a] and [b]

D) None of the above

• question_answer384) Spraying of DDT on crops produces pollution of

A) air only

B) air and soil only

C) air and water only

D) All of the above

• question_answer385) Which of the following is most important source of food?

A) Lichen

B) Angiosperms

C) Algae

D) Fungi

• question_answer386) Which of the following is a pseudocereal

A) Triticum aestivum

B) Oryza sativa

C) Zea mays

D) Fagopyrum esculentum

• question_answer387) Which of the following is rich source of protein?

A) Rice

B) Wheat

C) Groundnut

D) Pearl millet

• question_answer388) Which of the following is surface fibre?

A) Coir

B) Cotton

C) Sunnhemp

D) Manilahemp

• question_answer389) Which of the following is not a plant fibre?

A) Cotton

B) Coir

C) Sunnhemp

D) Silk

A) haploid

B) diploid

C) tetraploid

D) hexaploid

• question_answer391) Which of the following is an oilseed crop ?

A) Careopsis

C) Sunflower

D) Chrysanthemum

• question_answer392) Richest source of carbohydrate is

A) Sorghum

B) groundnut

C) gram

D) wheat

• question_answer393) Plants which yield pulses belong to family

A) Papilionaceae

B) Rosaceae

C) Malvaceae

D) Compositae

• question_answer394) Which state of India is the largest producer of jute?

A) West Bengal

C) Bihar

• question_answer395) From which part of plant, cotton fibres are obtained?

A) Root hairs

B) Stem hairs

C) Leaf

D) Seed hairs

• question_answer396) In which part of plant, groundnut oil is stored?

A) Leaf

B) Tuber

C) Cotyledon

D) Root

• question_answer397) Food can be easily preserved at low temperature because at low temperature

A) the food can easily be digested

B) the food can easily be cooked

C) the bacterial attack on food is minimized

D) All of the above

• question_answer398) Selection is the method of

A) Plant physiology

B) Plant breeding

C) Genetics

D) Cytology

• question_answer399) Removal of anthers from flowers buds is called

A) bagging

B) hybridization

C) emasculation

D) heterosis

• question_answer400) What are the main objectives of plant breeding?

A) More yield

B) Better quality

C) Stress resistance

D) All of these