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

### done Uttarakhand PMT Solved Paper-2004

• question_answer1) Three blocks of masses ${{m}_{1}},{{m}_{2}}$and${{m}_{3}}$are connected by massless strings as shown on a frictionless table. They are pulled with a force of 40 N. If $\text{10kg,}{{\text{m}}_{\text{2}}}\text{=6kg}$ and ${{\text{m}}_{3}}\text{=6}\,\text{kg}$ then tension${{T}_{2}}$will be:

A) 10 N

B) 20 N

C) 32 N

D) 40 N

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• question_answer2) A rocket of mass 1000 kg is to be projected vertically upwards. The gases are exhausted vertically downwards with velocity 100 m/s with respect to the rocket. What is the minimum rate of burning of fuel, so as to just lift the rocket upwards against the gravitational attraction? (Take$g=10\text{ }m/{{s}^{2}}$).

A) 50 kg/s

B) 100 kg/s

C) 200 kg/s

D) 400 kg/s

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• question_answer3) A force of 10 N acts on a body of mass 20 kg. for 10 seconds. The change in its momentum is :

A) 50 kg-m/s

B) 100 kg-m/s

C) 300 kg-m/s

D) 1000 kg-m/s

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• question_answer4) If an iron ball and a wooden ball of the same radius are released from a height h in vacuum, then time taken by both of them, to reach the ground will be :

A) zero

B) unequal

C) roughly equal

D) exactly equal

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• question_answer5) A ball of mass 0.25 kg attached to the ends of a string of length 1.96 m is rotating in a horizontal circle. The string will break, if tension is more than 25 N. What is the maximum velocity with which the ball can be rotated?

A) 3 m/s

B) 5 m/s

C) 9 m/s

D) 14 m/s

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• question_answer6) In uniform circular motion, the factor that remains constant is :

A) acceleration

B) momentum

C) kinetic energy

D) linear velocity

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• question_answer7) A projectile is fired at$30{}^\circ$with momentum p. Neglecting friction, the change in kinetic energy, when it returns back to the ground, will be:

A) zero

B) 30%

C) 60%

D) 100%

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• question_answer8) If a car at rest accelerates uniformly and attains a speed of 72 km/hr in 10 s, then it covers a distance of :

A) 50 m

B) 100 m

C) 200 m

D) 400 m

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• question_answer9) Suppose refractive index $\mu$ is given as $\mu =A+B/{{\lambda }^{2}},$ where A and B are constants and is wavelength then the dimensions of B are same as that of :

A) wavelength

B) pressure

C) area

D) volume

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• question_answer10) We wish to see inside an atom. Assuming the atom to have a diameter of 100 pm, this means that one must be able to resolve a width of say 10 pm. If an electron microscope is used, the minimum electron energy required is about :

A) 15 keV

B) 1.5 keV

C) 150 keV

D) 1.5 MeV

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• question_answer11) A particle is moving under the influence of a force which is fixed in magnitude and acting at an angle$\theta$in the direction of motion. The path described by the particle is :

A) a circle

B) an ellipse

C) a parabola

D) a straight line

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• question_answer12) 300 J of work is done in sliding a 2 kg block up an inclined plane of height 10 m. The work done against friction is (Take$g=10\text{ }m/{{s}^{2}}$)

A) zero

B) 100 J

C) 200 J

D) 300 J

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• question_answer13) The torque of force $\text{\vec{F}=(2\hat{i}-3\hat{J}+4\hat{k})}$ newton acting at a point $\text{\vec{r}=(3\hat{i}+2\hat{J}+3\hat{k})}$ metre about origin is:

A) $6\vec{i}-6\vec{J}+12\vec{k}N-m$

B) $-6\vec{i}+6\vec{J}-12\vec{k}N-m$

C) $17\vec{i}-6\vec{J}-13\vec{k}N-m$

D) $-17\vec{i}-6\vec{J}-13\vec{k}N-m$

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• question_answer14) A machine which is 75% efficient, uses 12 J of energy in lifting 1 kg mass through a certain distance. The mass is then allowed to fall through the same distance. The velocity at the end of its fall is

A) $\sqrt{12}$ m/s

B) $\sqrt{18}$ m/s

C) $\sqrt{24}$m/s

D) $\sqrt{32}$ m/s

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• question_answer15) In an equilateral triangle ABC ${{F}_{1}}$${{F}_{2}}$ and ${{F}_{3}}$ are three forces acting along the sides AB, BC and AC as shown in the given figure. What should be the magnitude of ${{F}_{3}}$ so that the total torque about O is zero?

A) 2 N

B) 4 N

C) 6 N

D) 8 N

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• question_answer16) The rotational kinetic energy of a body is ${{K}_{rot}}$ and its moment of inertia is J. The angular momentum of body is :

A) $I{{K}_{rot}}$

B) $2\sqrt{I{{K}_{rot}}}$

C) $\sqrt{21\,{{K}_{rot}}}$

D) $2\,I{{K}_{rot}}$

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• question_answer17) A small steel sphere of mass m is tied to a string of length r and is whirled in a horizontal circle with a uniform angular velocity 2 $\omega$ The string is suddenly pulled, so that radius of the circle is halved. The new angular velocity will be:

A) 2 $\omega$

B) $\omega$

C) 6 $\omega$

D) 8 $\omega$

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• question_answer18) A uniform disc of mass M and radius R is mounted on an axle supported in friction less bearings. A light cord is wrapped around the rim of the disc and a steady downward pull T is exerted on the cord. The angular acceleration of the disc is :

A) $\frac{MR}{2T}$

B) $\frac{2T}{MR}$

C) $\frac{T}{MR}$

D) $\frac{MR}{T}$

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• question_answer19) If the rotational speed of earth is increased then weight of a body at the equator :

A) increases

B) decreases

C) becomes double

D) does not change

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• question_answer20) The earth revolves around the sun in one year. If distance between them becomes double, the new time period of revolution will be :

A) $4\sqrt{2}$ years

B) $2\sqrt{2}$ years

C) 4 years

D) 8 years

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• question_answer21) The orbital velocity of an artificial satellite in a circular orbit just above the earths surface is $\upsilon$ The orbital velocity of a satellite orbiting at an altitude of half of the radius, is :

A) $\frac{3}{2}{{\upsilon }_{0}}$

B) $\frac{2}{3}{{\upsilon }_{0}}$

C) $\frac{\sqrt{2}}{3}{{\upsilon }_{0}}$

D) $\frac{\sqrt{3}}{2}{{\upsilon }_{0}}$

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• question_answer22) The amplitude of an oscillating simple pendulum is 10 cm and its time period is 4 s. Its speed after 1 s when it passes through its equilibrium position is :

A) zero

B) 2.0 m/s

C) 0.3 m/s

D) 0.4 m/s

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• question_answer23) A simple second pendulum is mounted in a rocket. Its time period will decrease when the rocket is :

A) moving up with uniform velocity

B) moving up with uniform acceleration

C) moving down with uniform acceleration

D) moving around the earth in geostationary orbit

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• question_answer24) A child swinging on a swing in a sitting position, stands up, then the time period of the swing will:

A) increase

B) decrease

C) remain the same

D) increase if the child is long and

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• question_answer25) decrease if the child is short The phenomena arising due to the superposition of waves is/are:

A) beats

B) stationary waves

C) Lissajous figures

D) all of these

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• question_answer26) A vehicle with horn of frequency v is moving with a velocity of 30 m/s in a direction perpendicular to the line joining the observer and the vehicle. The observer perceives the sound to have a frequency $(v+{{v}_{1}})$. If the sound velocity in air is 300 m/s, then.

A)  ${{v}_{1}}=0$

B)   ${{v}_{1}}=0.1v$

C)  ${{v}_{1}}=-0.1\text{ }v$

D)  ${{v}_{1}}=10\text{ }v$

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• question_answer27) A ball falling in a lake of depth 200 m shows 0.1% decrease in its volume at the bottom. What is the Bulk modulus of the ball material? (Take density of water$=1000\text{ }kg/{{m}^{3}}$)

A) $19.6\times {{10}^{8}}N/{{m}^{2}}$

B) $19.6\times {{10}^{-10}}N/{{m}^{2}}$

C) $19.6\times {{10}^{10}}N/{{m}^{2}}$

D) $19.6\times {{10}^{-8}}N/{{m}^{2}}$

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• question_answer28) At what temperature, hydrogen molecules will escape from the earths surface? (Take mass of hydrogen molecule$=0.34\times {{10}^{-26}}kg,$ Boltzmann constant$=1.38\times {{10}^{-23}}JK,$ Radius of earth$=6.4\times {{10}^{6}}m$ and acceleration due to gravity$=9.8\text{ }m/{{s}^{2}}$)

A) 10 K

B) ${{10}^{2}}K$

C) ${{10}^{3}}K$

D) ${{10}^{4}}K$

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• question_answer29) Real gases obey ideal gas laws more closely at:

A) low pressure and low temperature

B) low pressure and high temperature

C) high pressure and low temperature

D) high pressure and high temperature

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• question_answer30) Carnot engine cannot give 100% efficiency, because we cannot :

A) eleminate friction

B) find ideal sources

C) prevent radiation

D) reach absolute zero temperature

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• question_answer31) Two cylinders fitted with pistons contain equal amounts of an idea! diatomic gas at 300 K. The piston of A is free to move, while that of B is held fixed. The same amount of heat is given to the gas in each cylinder. If the rise in temperature of gas in A is 300 K, then rise in temperature of gas in B is :

A) 30 K

B) 18 K

C) 50 K

D) 42 K

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• question_answer32) A thin square plate with each side equal to 10 cm, is heated by a blacksmith. The rate of radiated energy by the heated plate is 1134 watts. The temperature of hot square plate is (Stefans constant$\sigma =5.67\times {{10}^{-8}}W-{{m}^{2}}{{K}^{-4}};$ Emissivity of plate = 1)

A) 1000 K

B) 1189 K

C) 2000 K

D) 2378 K

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• question_answer33) A beaker of hot water cools from$75{}^\circ C$to$70{}^\circ C$ in ${{t}_{1}}$ minutes, from$70{}^\circ C$ to$65{}^\circ C$in ${{t}_{2}}$ minutes and from$65{}^\circ C$ to $60{}^\circ C$ in${{t}_{3}}$ minutes. Then :

A) ${{t}_{1}}={{t}_{2}}={{t}_{3}}$

B) ${{t}_{1}}<{{t}_{2}}<{{t}_{3}}$

C) ${{t}_{1}}>{{t}_{2}}>{{t}_{3}}$

D) ${{t}_{1}}<{{t}_{2}}>{{t}_{3}}$

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• question_answer34) If the ratio of specific heats of a gas at constant pressure to that at constant volume is $\text{ }\!\!\gamma\!\!\text{ ,}$ the change in internal energy of a gas, when the volume changes from V to 2V at constant pressure P, is :

A) PV

B) $\frac{\text{R}}{\text{ }\!\!\gamma\!\!\text{ -1}}$

C) $\frac{PV}{\gamma -1}$

D) $\frac{\text{ }\!\!\gamma\!\!\text{ PV}}{\text{ }\!\!\gamma\!\!\text{ -1}}$

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• question_answer35) When a charged oil drop moves upwards in an electric field of strength E, the electric force acting on the drop is :

A) equal to the gravitational force

B) less than the gravitational force

C) greater than the gravitational force

D) greater than the mass of the oil drop

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• question_answer36) What is the resultant capacitance between points A and B?

A) 51$\pi F$

B) 102$\pi F$

C) 204 $\pi F$

D) 408 $\pi F$

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• question_answer37) If a uniform wire of resistance R is uniformly stretched to n times the original length, then new resistance of the wire becomes :

A) n R

B) ${{n}^{2}}R$

C) $\frac{R}{n}$

D) $\frac{R}{{{n}^{2}}}$

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• question_answer38) A $2{}^\circ C$ rise in temperature is observed in a conductor by passing a current. When the current is tripled, the rise in temperature will be:

A) $9{}^\circ C$

B) $18{}^\circ C$

C) $27{}^\circ C$

D) $36{}^\circ C$

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• question_answer39) A conducting rod AC of length $4l$ is rotated about $_{B}^{a}\to$point O in a uniform magnetic field B directed into the paper. $AO=l$ and $OC=3l$ then :

A) $VA-Vo=\frac{B\omega {{l}^{2}}}{2}$

B) $Vo-Vc=\frac{9}{2}B\omega {{l}^{2}}$

C) $Vo-Vc=4B\omega {{l}^{2}}$

D) $Vo-Vc=\frac{9}{2}B\omega {{l}^{2}}$

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• question_answer40) If two wires are carrying currents in opposite directions, then they will:

A) repel each other

B) attract each other

C) become inclined to each other

D) neither repel nor attract each other

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• question_answer41) The radius of second Bohrs orbit of hydrogen atom is:

A) 0.053 nm

B) 0.106 nm

C) 0.2116 nm

D) 0.4256 nm

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• question_answer42) Kinetic energy of one mole of an ideal gas at 300 K is:

A) 3.48 kJ

B) 3.74 kJ

C) 37.4 kJ

D) 34.8 kJ

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• question_answer43) Which of the following is the correct electronic configuration of Cr?

A) $1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}4{{s}^{1}}3{{d}^{5}}$

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

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

D) $1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}4{{s}^{1}}3{{s}^{8}}$

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• question_answer44) If the value of${{C}_{p}}$for nitrogen gas is $j{{K}^{-1}}mo{{l}^{-1}},$then the value of$\Delta H$on heating 28 g of nitrogen gas from$0{}^\circ C$to$100{}^\circ C$at constant pressure will be:

A) 1200 J

B) 1300 J

C) 1400 J

D) 1500 J

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• question_answer45) The least count of an instrument is 0.01 cm. Taking all precautions, the most possible error in the measurement can be:

A) 0.005 cm

B) 0.01 cm

C) 0.0001 cm

D) 0.1 cm

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• question_answer46) The phenomenon of radioactivity was discovered by:

A) Henry Becquerrel

B) Madam Curie

C) P. Curie

D) Rutherford

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• question_answer47) Hydrogen peroxide is prepared in the laboratory by:

A) passing$C{{O}_{2}}$into$Ba{{O}_{2}}$

B) adding$Mn{{O}_{2}}$to dil.${{H}_{2}}S{{O}_{4}}$

C) adding$N{{a}_{2}}{{O}_{2}}$to cold water

D) adding$Pb{{O}_{2}}$into$KMn{{O}_{4}}$.

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• question_answer48) Vinegar is:

A) HCHO

B) HCOOH

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

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

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• question_answer49) Which of the following product is formed in the reaction $C{{H}_{3}}MgBr\xrightarrow[(ii){{H}_{2}}O]{(i)C{{O}_{2}}}?$

A) Acetic acid

B) Methanoic acid

C) Methanol

D) Ethanal

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• question_answer50) Ethyl chloride is converted into diethyl ether by:

A) Perkins reaction

B) Grignard reagent

C) Wurtz reaction

D) Williamsons synthesis

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• question_answer51) lodoform test is not answered by:

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

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

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

D) $C{{H}_{3}}\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{CH}}\,C{{H}_{3}}$

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• question_answer52) The equivalent weight of a solid element is found to be 9. If the specific heat of this element is$1.05\,Jg\,{{K}^{-1}},$then its atomic weight is:

A) 17

B) 21

C) 25

D) 27

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• question_answer53) The maximum energy is possessed by an electron, when it is present:

A) in nucleus

B) in ground energy state

C) in first excited state

D) at infinite distance from the nucleus

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• question_answer54) A gas has a vapour density 11.2. The volume occupied by 1 gm of gas at NTP is:

A) 1 litre

B) 11.2 litre

C) 22.4 litre

D) unpredictable

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• question_answer55) Particle nature of electron was experimently demonstrated by:

A) Max Bon

B) J.J. Thomson

C) de Broglie

D) Schrondinger

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• question_answer56) Which of the following is a magic number?

A) 10

B) 16

C) 55

D) 50

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• question_answer57) The Ostwald dilution law is expressed as:

A) ${{K}_{a}}=\frac{c{{\alpha }^{2}}}{(1-\alpha )}$

B) ${{K}_{a}}=\frac{c\alpha }{(1-\alpha )}$

C) ${{K}_{a}}=\frac{1-\alpha }{c{{\alpha }^{2}}}$

D) ${{K}_{a}}=\frac{c(1-\alpha )}{{{\alpha }^{2}}}$

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• question_answer58) The pH value of an acid is 5 and its concentration is 1 M. What is the value of${{K}_{a}}$ for the acid?

A) ${{10}^{-7}}$

B) ${{10}^{-5}}$

C) ${{10}^{-10}}$

D) ${{10}^{-8}}$

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• question_answer59) To calculate the amount of work done in joules during reversible isothermal expansion of an ideal gas, the volume must be expressed in:

A) ${{m}^{3}}$ only

B) $d{{m}^{3}}$ only

C) $c{{m}^{3}}$only

D) any of these

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• question_answer60) In the reaction,${{H}_{2}}(g)+{{I}_{2}}(g)\xrightarrow[{}]{{}}2HI(g).$Which of the following is correct?

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

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

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

D) ${{K}_{p}}\ge {{K}_{c}}$

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• question_answer61) The mass of an object changes from 0.2 g to 0.025 g in 1500 years. The half life of the object is:

A) 500 yrs

B) 600 yrs

C) 800 yrs

D) 950 yrs

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• question_answer62) Which of the following is the correct nuclear reaction, when 90 Th undergoes one$\beta -$ emission?

A) $_{90}^{233}Th\xrightarrow[{}]{{}}\,_{90}^{233}Pa{{+}_{-2}}{{e}^{0}}$

B) $_{90}^{233}Th\xrightarrow[{}]{{}}\,_{91}^{233}Pa{{+}_{-1}}{{e}^{0}}$

C) $_{90}^{233}Th\xrightarrow[{}]{{}}\,_{90}^{292}Pa{{+}_{0}}{{e}^{4}}$

D) $_{90}^{233}Th\xrightarrow[{}]{{}}\,_{91}^{229}Pa{{+}_{-1}}{{e}^{4}}$

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• question_answer63) Which of the following is the chief ore of copper?

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

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

C) $CuFe{{S}_{2}}$

D) $CuC{{O}_{3}}.Cu{{(OH)}_{2}}$

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• question_answer64) Which of the following is an epsom salt?

A) $2CaS{{O}_{4}}.{{H}_{2}}O$

B) $MgS{{O}_{4}}.7{{H}_{2}}O$

C) $MgS{{O}_{4}}.2{{H}_{2}}O$

D) $BaS{{O}_{4}}.2{{H}_{2}}O$

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• question_answer65) Bromine can be liberated from$KBr$solution by the action of:

A) $KI$

B) $NaCl$

C) $C{{l}_{2}}$

D) 12 solution

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• question_answer66) When lead nitrate is heated, it produces:

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

B) $NO$

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

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

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• question_answer67) Which of the following lanthanide is commonly used?

A) Lanthanum

B) Nobelium

C) Thorium

D) Cerium

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• question_answer68) The IUPAC name of ${{(C{{H}_{3}})}_{3}}CCH=C{{H}_{2}}$is:

A) 3, 3-dimethyl-l-butene

B) 2, 2-dimethyl 3-butene

C) 1, 1, 1-trimethyl-2-propene

D) 3, 3, 3-trimethyl 2-propene

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• question_answer69) The order of reactivities of methyl halide in the formation of Grignard reagent is:

A) $C{{H}_{3}}Cl>C{{H}_{3}}Br>C{{H}_{3}}I$

B) $C{{H}_{3}}I>C{{H}_{3}}Br>C{{H}_{3}}Cl$

C) $C{{H}_{3}}Br>C{{H}_{3}}I>C{{H}_{3}}Cl$

D) $C{{H}_{3}}Br>C{{H}_{3}}CI>C{{H}_{3}}I$

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• question_answer70) Which of the following waste materials can be used for producing bio-gas?

A) Thermocoal

B) Glass bottle

C) Tin cans

D) Paper scrap

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• question_answer71) Which of the following is called Marsh gas?

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

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

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

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

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• question_answer72) The hardness of water is estimated by:

A) EDTA method

B) Titrimetric method

C) Conductivity method

D) Distillation method

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• question_answer73) The addition of 1% alcohol to chloroform acts as:

A) auto-catalyst

B) bio-catalyst

C) positive catalyst

D) negative catalyst

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• question_answer74) Which one of the following order of acid strength is correct?

A) $RCOOH>HOH>ROH>HC\equiv CH$

B) $RCOOH>HOH>CH\equiv CH>ROH$

C) $RCOOH>HC\equiv CH>HOH>ROH$

D) $RCOOH>ROH>HOH>CH\equiv CH$

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• question_answer75) In order to convert aniline into chlorobenzene the reagent used is:

A) $NaN{{O}_{2}}/HCl,\text{ }CuCl$

B) $C{{l}_{2}}/CC{{l}_{4}}$

C) $C{{l}_{2}}/AlC{{l}_{3}}$

D) $CuC{{l}_{2}}$

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• question_answer76) A drug that is antipyretic as well as analgesic is:

A) chloroquine

B) penicilline

C) paracetamol

D) chloropromazine hydrochloride

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• question_answer77) The basic component of the smog is:

A) PAN

B) PBN

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

D) all of these

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• question_answer78) DNA multiplication is called:

A) translation

B) transduction

C) transcription

D) replication

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• question_answer79) Hexoses and pentoses are:

A) disaccharides

B) Monosaccharides

C) Polysaccharides

D) Oligosaccharides

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• question_answer80) An ester used as medicine is:

A) ethyl acetate

B) methyl salicylate

C) ethyl benzoate

D) methyl benzoate

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• question_answer81) What is formed when nitrobenzene is reduced using zinc and alkali?

A) Phenol

B) Hydroazobenzene

C) Aniline

D) Nitrosobenzene

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• question_answer82) Which of the following test is not used for testing of proteins?

A) Millons test

B) Molishs test

C) Biuret test

D) Ninhydrin test

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• question_answer83) Which of the following is not a synthetic fibre?

A) Rubber

B) Nylon-6

C) Nylon-6, 6

D) Nylon-6, 10

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• question_answer84) A liquid decomposes at its normal boiling point. It can be purified by:

A) sublimation

B) steam distillation

C) vacuum distillation

D) fractional distillation

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• question_answer85) Which of the following is obtained when auric chloride reacts with sodium chloride?

A) $Na[AuCl]$

B) $Na[AuC{{l}_{2}}]$

C) $Na[AuC{{l}_{3}}]$

D) $Na[AuC{{l}_{4}}]$

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• question_answer86) The limiting radius ratio for tetrahedral shape is:

A) 0 to 0.155

B) 0.225 to 0.414

C) 0.155 to 0.225

D) 0.414 to 0.732

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• question_answer87) When a capillary tube of diameter 0.8 mm is dipped in a liquid having density$800\text{ }kg\text{ }{{m}^{-3}},$ then the height of liquid in the capillary tube rises to 4 cm. The surface tension of liquid is$(g=9.8m/{{s}^{2}}):$

A) $4.3\times {{10}^{-2}}N{{m}^{-1}}$

B) $5.6\times {{10}^{-2}}N{{m}^{-1}}$

C) $6.3\times {{10}^{-2}}N{{m}^{-1}}$

D) $7.3\times {{10}^{-2}}N{{m}^{-1}}$

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• question_answer88) The$BC{{l}_{3}}$is a planar molecule whereas$NC{{l}_{3}}$is pyramidal, because:

A) nitrogen atom is smaller than boron atoms

B) $B-Cl$bond is more polar than$N-Cl$bond.

C) $N-Cl$bond is more covalent than$B-Cl$ bond

D) $BC{{l}_{3}}$has no lone pair but$NC{{l}_{3}}$has a lone pair of electrons

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• question_answer89) Railway wagon axles are made by heating iron rods embedded in charcoal powder. This process is known as:

A) tempering

B) anneling

C) sherardising

D) case hardening

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• question_answer90) The reaction $Ag_{(aq)}^{2+}+A{{g}_{(s)}}2Ag_{(aq)}^{+}$ is an example of:

A) reduction

B) oxidation

C) disproportionation

D) none of these

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• question_answer91) Number of a and n bonds in acetylene are:

A) 3 and 2

B) 2 and 2

C) 2 and 3

D) 4 and 3

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• question_answer92) The percentage s-character of the hybrid orbitals in methane, ethene and ethyne are respectively:

A) 25, 50, 75

B) 25, 33, 50

C) 10, 20, 40

D) 50, 75, 100

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• question_answer93) Which of the following statements is true?

A) $\Delta G$ is always less than$\Delta H$

B) $\Delta G$is always more than$\Delta H$

C) $\Delta G$is always proportional to$\Delta H$

D) $\Delta G$may be lesser, greater or equal to$\Delta H$

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• question_answer94) Which of the following is not a characteristic of chemisorption?

A) Adsorption is specific

B) Adsorption is irreversible

C) $\Delta H$is of the order of 400 kJ

D) Adsorption may be multimolecular layer

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• question_answer95) Which of the following process is not used for the purification of solid impurities?

A) Distillation

B) Sublimation

C) Crystallisation

D) Vaporisation

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• question_answer96) Which of the following organization is engaged in the promotion and construction of bio-gas plants in India?

A) KBIC

B) GVD

C) KVIC

D) All of these

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• question_answer97) Which of the following is not true about the urea?

A) It can be stored easily

B) It should be applied at sowing time

C) It cannot be used for all types of crops and soils

D) The cost of production of urea is cheap.

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• question_answer98) Which of the following reagent can distinguish between 1-Butyne and 2-Butyne?

A) Aqueous$NaOH$

B) Bromine water

C) Fehlings solution

D) Ammonical$AgN{{O}_{3}}$

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• question_answer99) At 530 K, glycerol reacts with oxalic acid to produce:

A) allyl alcohol

B) formic acid

C) glyceraldehyde

D) formaldehyde

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• question_answer100) Which of the following compound does not undergo schotten Baumann reaction?

A) Phenol

B) Primary amine

C) Secondary amine

D) Tertiary amine

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• question_answer101) The main function of lysosome is :

A) sexual reproduction

B) extracellular digestion

C) intracellular digestion

D) both b and c

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• question_answer102) Which of the following maintains continuity between the water and lipid phases inside and outside the cells ?

A) Cell wall

B) Lecithin

C) Cell vacuole

D) Cell membrane of woody plants

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• question_answer103) The method of classification, called cladistics, is based on :

A) natural system

B) mutation theory

C) artificial system

D) evolutionary history

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• question_answer104) In many bacteria, the cell membrane becomes invaginated and folded to form:

A) pili

B) cristae

C) fimbriae

D) mesosomes

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• question_answer105) Lomasomes are found in :

A) algal cell

B) fungal cell

C) bacterial cell

D) cyanobacterial cell

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• question_answer106) Zygote of Spirogyra produces four haploid nuclei, in which :

A) one is functional

B) two are functional

C) three are functional

D) all are functional

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• question_answer107) Which of the following part of Funaria, sporophyte is involved in the dispersal of spores ?

A) Calyptra

B) Operculum

C) Peristome

D) Annulus

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• question_answer108) In Selaginelln, the adaxial outgrowth, from the base of leaf, is called :

A) ligule

B) velum

C) rhizophore

D) glossopodium

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• question_answer109) In Pinus, the third tier of embryonal cells from below is known as :

A) rosette tier

B) suspensor tier

C) embryonal tier

D) free-nuclear tier

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• question_answer110) Most of the petrocrops belongs to family :

A) Malvaceae

B) Rutaceae

C) Leguminosae

D) Euphorbiaceae

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• question_answer111) Amia belongs to family :

A) Labiatae

B) Fabaceae

C) Solanaceae

D) Euphorbiaceae

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• question_answer112) Tuberous roots are found in :

A) Beta viilgaris

B) Dnucus carota

C) Iponioea batatas

D) Raphanus sativus

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• question_answer113) Velamen is found in :

A) Vanda

B) Rosa

C) Viscum

D) Santlum

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• question_answer114) The type of leaf in Dancus carota is :

A) simple

B) bipinnate

C) tripinnate

D) decompound

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• question_answer115) Aerenchyma provides :

A) flexibility to plants

B) mechanical strength to plants

C) buoyancy to hydrophytic plants

D) promoting nature of photosynthesis

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• question_answer116) Two cross-sections of stem and root appear simple, when viewed by naked eye. But under microscope, they can be differentiated by :

A) exarch condition of root and stem

B) endarch condition of stem and root

C) endarch condition of root and exarch condition of stem

D) endarch condition of stem and exarch condition of root

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• question_answer117) Umbel inflorescence is found in :

A) Musa

B) Colocasia

C) Coriandrum

D) Helianthus

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• question_answer118) When gynoecium is present in the topmost position of thalamus, the flower is known as :

A) Inferior

B) epigenous

C) perigynous

D) hypogenous

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• question_answer119) Orthotropus ovule belongs to :

A) Urtica

B) Polygonum

C) Peperomea

D) all of these

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• question_answer120) In a flowering plant, megaspore develops into an embryo sac, which contains :

A) 4 cell, one of which is an egg

B) 6 cells, one of which is an egg

C) 8 cells, one of which is an egg

D) none of these

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• question_answer121) The type of pollination found in Calotropis is :

A) dicliny

B) herkogamy

C) heterostyly

D) dichogamy

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• question_answer122) Apogamy is :

A) reproduction of virus

B) failure of fusion of gametes

C) development of bacteria

D) loss of function of reproduction

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• question_answer123) If a sporangium is derived from a single cell, it is called :

A) leptosporangiate

B) eusporangiate

C) heterosporangiate

D) monosporangiate

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• question_answer124) Drupe contains :

A) stony endocarp

B) stony mesocarp

C) edible epicarp

D) edible endocarp

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• question_answer125) When stomata open, the pH of guard cells :

A) increases

B) decreases

C) remains same

D) both a and b

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• question_answer126) Water lost in guttation is :

A) pure water

B) impure water

C) in vapour form

D) either a and b

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• question_answer127) Photochemical reactions in the chloroplasts are directly involved in :

A) fixation of carbon dioxide

B) synthesis of glucose and starch

C) formation of phosphoglyceric acid

D) photolysis of water and phosphorylation of ADP to ATP

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• question_answer128) Which of the following elements are essential for the photolysis of water ?

A) $Ca$ and $C$

B) $\text{Mn}$and $\text{Cl}$

C) $\text{Zn}$ and $I$

D) $Cu$ and $Fe$

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• question_answer129) Respiratory Quotient (R.Q.) is denned as :

A) $\text{vol}\text{. of }{{\text{O}}_{\text{2}}}\text{/vol}\text{. of C}{{\text{O}}_{\text{2}}}$

B) $\text{vol}\text{. of C}{{\text{O}}_{\text{2}}}\text{/vol}\text{. of }{{\text{C}}_{\text{2}}}$

C) $\text{vol}\text{. of }{{\text{O}}_{\text{2}}}\text{/vol}\text{. of }{{\text{N}}_{\text{2}}}$

D) $\text{vol}\text{. of }{{\text{N}}_{\text{2}}}\text{/vol}\text{. of C}{{\text{O}}_{\text{2}}}$

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• question_answer130) A sleep movement in plants is a nastic response, that occurs daily in respose to :

A) dark

B) light

C) water

D) both a and b

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• question_answer131) Plant hormones are :

A) growth regulators

B) growth promoters

C) growth inhibitors

D) all of these

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• question_answer132) The most common auxin is :

A) GA

B) ABA

C) kinetin

D) IAA

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• question_answer133) Gibberellin promotes cell division and elongation in :

A) leaves

B) roots

C) shoots

D) all of these

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• question_answer134) The deteriorative processes in plants, that naturally terminate their functional life, are collectively called :

A) wilting

B) abscission

C) plasmolysis

D) senescence

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• question_answer135) Mendelian recombinations are due to :

A) linkage

B) mutations

C) dominant characters

D) independent assortment

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• question_answer136) Chromosome number $2n-1$ is an example of

A) trisomy

B) euploidy

C) polyploidy

D) monosomy

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• question_answer137) Agrobactcrittin hinicfcidens contains a large plasmid, which induces tumour in the plants, it is termed as :

A) Ti plasmid

B) Ri plasmid

C) recombinant plasmid

D) shine delgrano sequence

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• question_answer138) The organisms inhabiting a common environment belong to the same :

A) species

B) genus

C) population

D) community

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• question_answer139) Minerals, metals and fossil fuels are which type of resources of energy ?

A) renewable

B) non-renewable

C) biodegradable

D) degradable

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• question_answer140) Foul smell in the water bodies of tanks ponds etc. is due to :

A) aerobiosis

B) anaerobiosis

C) psammophytes

D) biological magnification

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• question_answer141) Ethology is the study of :

A) behaviour of animals

B) past life of organism

C) disease causing pathogens

D) none of these

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• question_answer142) The study of molluscan is called :

A) Nerology

B) Conchology

C) Malacology

D) Craniology

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• question_answer143) The globular proteins undergo structural changes, in response to extremes of pH or temperature, are called :

A) renaturation

B) denaturation

C) combinahon

D) both a and b

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• question_answer144) Sex chromosomes are also known as :

A) autosomes

B) allosomes

C) genome

D) karyotype

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• question_answer145) The lytic enzyme present in semen is :

A) ligase

B) estrogenase

C) androgenase

D) hyaluronidase

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• question_answer146) The fastest acting enzyme, in the biological kingdom, is :

A) lipase

B) amylase

C) peptidase

D) carbonic anhydrase

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• question_answer147) Chymotrypsin is produced by :

A) liver

B) pancreas

C) stomach

D) duodenum

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• question_answer148) In which of the following kingdom diatoms are placed ?

A) Plantae

B) Fungi

C) Protozoans

D) Protista

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• question_answer149) Nucleus of Monocystis is :

A) bilobed

B) spherical

C) multilobed

D) bean shaped

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• question_answer150) Plasmodium is an :

A) endoparasite

B) ectoparasite

C) intercellular parasite

D) both a and b

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• question_answer151) Choanocyte is an ascon type of canal system, which is lined by :

A) porocyte

B) incurrent

C) apopyle

D) spongocoel

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• question_answer152) Which of the following are also known as collar cells ?

A) Choanocytes

B) Pinocytes

C) Thesocytes

D) Cnidoblast

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• question_answer153) Rostellum and hooks are absent in the scolex of :

A) Taenia seginata

B) Taenia solium

C) Echinococcus granulosus

D) Fasciola hepatica

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• question_answer154) Coelom in Ascaris lumbricoides, is :

A) truecoelom

B) pseudocoelom

C) schizocoelom

D) phycocoelom

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• question_answer155) Which of the following animal is sanguivorous?

A) Ncivis

B) Tapeworm

C) Earthworm

D) Hirudinaria

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• question_answer156) Sand fly spreads a particular type of disease by its :

A) proboscis

B) mandible

C) salivary gland

D) none of these

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• question_answer157) Which of the following belongs to the class Amphineura ?

A) Chiton

B) Nautilus

C) Dentalium

D) Pinctada

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• question_answer158) Ambulacral system is mainly useful for :

A) locomotion

B) circulation

C) feeding

D) defence

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• question_answer159) Swim bladder is present in :

A) star fishes

B) bony fishes

C) carp fishes

D) all of these

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• question_answer160) The Indian salamander is :

A) Siren

B) Toilotriton

C) Amblystoma

D) Necturus

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• question_answer161) The character of birds, without exception, is :

A) omnivorous

B) Hying wings

C) beak without teeth

D) lay eggs with calcareous shell

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• question_answer162) Blood platelets are found only in the blood of:

A) birds

B) reptiles

C) mammals

D) amphibians

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• question_answer163) Ligament connects :

A) bone to bone

B) bone to muscle

C) muscle to muscle

D) both b and c

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• question_answer164) Which of the following fatty acid is not synthesised in the human body ?

A) Glycerol

B) Cholesterol

C) Linoleic acid

D) Both a and b

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• question_answer165) Which of the following blood vessel in the circulatory system of frog has more deoxygenated blood ?

A) Pulmonary artery

B) Precaval veins

C) Pulmocutaneous artery

D) Pulmocutaneous vein

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• question_answer166) Tachycardia is :

A) fast heart rate

B) slow heart rate

C) stop heart rate

D) normal heart rate

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• question_answer167) Atrial natriuretic hormone is produced by:

A) kidney

B) heart

C) duodenum

D) thyroid gland

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• question_answer168) Cells present in the inner lining of kidneys are:

A) podocytes

B) choanocytes

C) pinocytes

D) nephrocytes

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• question_answer169) Which of the following does not control the heart beat ?

A) Vagus

B) Epinephrine

C) Norepinephrine

D) Glossopharyngeal nerve

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• question_answer170) The egg of frog is :

A) telolecithal

B) microlecithal

C) alecithal

D) centrolecithal

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• question_answer171) Which of the following undergoes spermigenesis ?

A) Spermatids

B) Spermatogonia

C) Primary spermatocytes

D) Secondary spermatocytes

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• question_answer172) Antifertilizin is present on :

A) egg

B) tail

C) ovum

D) spermatozoa

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• question_answer173) Swan neck flask experiment proved :

A) biogenesis

B) abiogenesis

C) gene therapy

D) both a and b

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• question_answer174) Cosmozoic theory was proposed by :

A) Helmholtz

B) Richter

C) Pasteur

D) Arrhenius

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• question_answer175) The idea, not related to the Darwinian evolutionary theory is :

A) survival of the fittest

B) struggle for existence

C) inheritance of acquired characters

D) origin of species by natural selection

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• question_answer176) Which of the following has the least number of chromosomes?

A) Amoeba

B) Drosophila

C) Pheretima

D) Ascaris niegalocrphala

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• question_answer177) Exotoxins are related with :

A) tetanus

B) diphtheria

C) cancer

D) both a and b

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• question_answer178) Argentaffin may arise in :

A) pancreas

B) bile duct

C) intestinal tract

D) all of these

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• question_answer179) Which of these may cause hypothermia in humans?

A) Smoking

B) LSD

C) Dopamine

D) Alcohol consumption

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• question_answer180) Which of the following is a dual purpose breed?

A) Sindhi

B) Deoni

C) Jersey

D) Sahiwal

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• question_answer181) Which structure of man is similar to spiracle of cockroach?

A) Nostril

B) Bronchiole

C) Lungs

D) Alveoli

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• question_answer182) Name given to foossil hominid of Shivalik hills in India is :

A) Ramapithecus

B) Australopithecus

C) Pithecanthropus

D) Neanderthalensis

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• question_answer183) Passive immunity can be obtained by in jecting:

A) antibodies

B) antigen

C) antibiotic

D) vaccination

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• question_answer184) Vagina, oesophagus, urethra contain which type of tissue?

A) Stratified squamous epithelium

B) Simple squamous epithelium

C) Ciliated epithelium

D) Columnar epithelium

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• question_answer185) In five kingdom system of classification of R.H, Whittaker, how many kingdoms contain eukaryotes ?

A) Four kingdoms

B) One kingdom

C) Two kingdoms

D) Three kingdoms

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• question_answer186) Taemti solium is associated with :

A) apolysis

B) strobilisation

C) Premonition

D) all of these

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• question_answer187) Modern man is evolved :

A) 10000 years ago

B) 25000 years ago

C) 5000 years ago

D) 50000 years ago

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• question_answer188) Improvement of human race is called :

A) euthenics

B) human heredity

C) human demography

D) eugenics

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• question_answer189) Mammary glands are modified :

A) sweat gland

B) sebaceous gland

C) lacrymal gland

D) endocrine gland

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• question_answer190) Which one is incorrect?

A) Shell fish-Pisces

B) Silver fish-Arthropoda

C) Cuttle hsh-Mollusca

D) Star fish-Echinodermata

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• question_answer191) Inheritance of acquired characters comes under:

A) Lamarck ism

B) Darwinism

C) Neo-Lamarckism

D) Neo-Darwinism

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• question_answer192) The mesozoic era is also called as :

A) the golden age of the amphibians

B) the golden age of the reptiles

C) me golden age of the mammals

D) the golden age of the birds

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• question_answer193) Lungs ventilation movements is due to :

A) coastal muscle and diaphragm

B) coastal muscle

C) diaphragm

D) wall of the lungs

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• question_answer194) Average kilocalorie of energy needed by woman is:

A) less than man

B) more than man

C) equal to man

D) can not be predicted

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• question_answer195) Which hormone helps in reabsorption of water from kidney ?

A) ADH

B) STH

C) ACTH

D) TTH

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• question_answer196) Loop of Henie is associated with :

A) excretory system

B) respiratory system

C) reproductive system

D) digestive system

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• question_answer197) Sexual mode of reproduction in Protozoa is :

A) anisogamy

B) plasmogamy

C) plasmotomy

D) schizogony

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• question_answer198) Which of the following is correct?

A) 99% of existed species are extinct

B) 25% of existed species are extinct

C) 40% of existed speciesare extinct

D) 30% of existed species are extinct

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• question_answer199) Which of the following is an exclusive character of class Mammalia ?

A) Homoiothermy

B) Internal fertilization

C) Presense of a 4-chambered heart

D) Presence of a muscular diaphragm

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• question_answer200) Which of the following is quartan in periodicity ?

A) P. malarias

B) P. vivax

C) P. ovale

D) P. falciparum

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