# Solved papers for JCECE Medical JCECE Medical Solved Paper-2013

### done JCECE Medical Solved Paper-2013

• question_answer1) A boat can go across a lake and return in time ${{T}_{0}}$at a speed $\upsilon .$On a rough day there is a uniform current at speed ${{\upsilon }_{1}}$ to help the onward journey and impede the return journey. If the time taken to go across and return on the same day be T, then $T/{{T}_{0}}$will be

A) $\frac{1}{(1-v_{1}^{2}/{{v}^{2}})}$

B) $\frac{1}{(1+v_{1}^{2}/{{v}^{2}})}$

C) $(1-v_{1}^{2}/{{v}^{2}})$

D) $\left( 1+\frac{v_{1}^{2}}{{{v}^{2}}} \right)$

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• question_answer2) If a balloon of mass M is descending down with an acceleration $a(<g),$then what is the value of mass $m$ (of its contents) that must be removed so that it starts moving up with an acceleration a?

A) $\frac{Ma}{(g+a)}$

B) $\frac{2Ma}{(g+a)}$

C) $\frac{M}{(g+a)}$

D) Not possible

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• question_answer3) If for a spherical mirror object distance, $u=(50.1\,\pm \,0.5)\,cm$and image distance $\upsilon =(20.1\,\pm \,0.2)\,cm,$then focal length of the spherical mirror will be

A) $(14.3\,\pm \,0.1)\,cm$

B) $(14.3\,\pm \,0.5)\,cm$

C) $(30.1\,\pm \,0.1)\,cm$

D) $(25.3\,\pm \,0.5)\,cm$

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• question_answer4) The susceptibility and permeability of a perfectly diamagnetic substance is

A) 1 and 0

B) 0 and 1

C) -1 and 0

D) -1 and 1

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• question_answer5) If a current carrying circular loop is placed in a $x-y$ plane as shown in adjoining figure and a magnetic field is applied along $z-$axis, then the loop will

A) contract

B) expand

C) move towards $-\text{ }x-$axis

D) move towards $+\,x-$axis

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• question_answer6) If the three vectors A,B and C satisfy the relation $A.B=0$and $A.C=0,$then vector A is parallel to

A) A

B) B

C) $A\times B$

D) $~B\times C$

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• question_answer7) A car weighing $\text{2}\,\text{ }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{3}}}\,\text{kg}$and moving at $20\text{ }m/s$along a main road collides with a lorry of mass $8\times {{10}^{3}}\,kg$which emerges at $5\text{ }m/s$from a cross road at right angle to the main road. If the two vehicles lock, what will be their velocity after the collision?

A) $4/\sqrt{2}\,m/s,\,{{45}^{o}}$ with cross road

B) $4/\sqrt{2}\,m/s,\,{{45}^{o}}$ with main road

C) $4/\sqrt{2}\,m/s,\,{{60}^{o}}$ with cross road

D) $4/\sqrt{2}\,m/s,\,{{60}^{o}}$with main road

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• question_answer8) If a water particle of mass 10 mg and having a charge of $1.5\times {{10}^{-6}}C$stays suspended in a room, then the magnitude and direction of electric field in the room is

A) $15\text{ }N/C,$vertically upwards

B) $15\text{ }N/C,$vertically dowards

C) $65.3\text{ }N/C,$vertically upwards

D) $65.3\text{ }N/C,$vertically downwards

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• question_answer9) In the adjoining figure, $E=5\,V=r=1\,\Omega ,\,$${{R}_{2}}=4\,\Omega ,\,{{R}_{1}}={{R}_{3}}=1\,\Omega$ and $C=3\mu F.$The numerical value of the charge on each plate of the capacitor is

A) $3\mu C$

B) $6\mu C$

C) $12\mu C$

D) $24\mu C$

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• question_answer10) Find out the value of current through $2\,\Omega$ resistance for the given circuit

A) zero

B) 2A

C) 4 A

D) 5 A

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• question_answer11) A pure resistive circuit element X when connected to an AC supply of peak voltage 200 V gives a peak current of 5 A. A second current element Y when connected to same AC supply gives the same value of peak current but the current lags behind by ${{90}^{o}}.$ If series. combination of X and Y is connected to the same supply, what is the impedance of the circuit?

A) $40\,\Omega$

B) $80\,\Omega$

C) $40\sqrt{2}\,\Omega$

D) $2\sqrt{40}\,\Omega$

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• question_answer12) Two circular coils C and D have equal number of turns and carry equal currents in the same direction in the same sense and subtend same solid angle at point O as shown in figure. The smaller coil C is midway between O and D. If we represent magnetic field induction due to bigger coil and smaller coil C as ${{B}_{D}}$and ${{B}_{C}}$ respectively, then ${{B}_{D}}/{{B}_{C}}$is

A) 1:4

B) 1:2

C) 2:1

D) 1:1

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• question_answer13) Equal volume of two immiscible liquids of densities $\rho$and $2\rho$are filled in a vessel as shown in figure. Two small holes are made at depth $\frac{h}{2}$and $\frac{3h}{2}$ from the surface of lighter liquid. If ${{\upsilon }_{1}}$and ${{\upsilon }_{2}}$are the velocities of efflux at these two holes, then ${{\upsilon }_{1}}/{{\upsilon }_{2}}$will be

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

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

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

D) $\frac{1}{4}$

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• question_answer14) Three conducting rods of same material and cross-section are connected as shown in figure. Temperatures of A, D and C are maintained at $20{{\,}^{o}}C,$$90{{\,}^{o}}C$and $0{{\,}^{o}}C.$ If there is no flow of heat in AB, then ratio of the lengths of BC and BD is

A) 2/9

B) 9/2

C) 2/7

D) 7/2

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• question_answer15) If two air columns of lengths 100 cm and 101 cm sounding in their fundamental note gave 17 beats in 20 seconds, then the velocity of sound will be

A) 277.8m/s

B) 300 m/s

C) 250 m/s

D) 343.4 m/s

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• question_answer16) If two springs of spring constants ${{k}_{1}}$ and ${{k}_{2}}$while executing SHM have equal highest velocities, then the ratio of their amplitudes will be (their masses are in ratio 1:2)

A) $\sqrt{2{{k}_{2}}/{{k}_{1}}}$

B) $\sqrt{2{{k}_{1}}/{{k}_{2}}}$

C) $2{{k}_{1}}/{{k}_{2}}$

D) $2{{k}_{2}}/{{k}_{1}}$

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• question_answer17) In the adjoining circuit of logic gate, the output Y becomes zero if the inputs are

A) $A=1,\text{ }B=1,C=0$

B) $A=0,\text{ }B=0,\text{ }C=0$

C) $~A=0,\text{ }B=1,\text{ }C=1$

D) $~A=1,\text{ }B=0,\text{ }C=0$

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• question_answer18) LANDSAT series of satellites move in near polar orbits at an altitude of

A) 512 km

B) 918 km

C) 3000 km

D) 3600 km

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• question_answer19) The intensity of gamma radiation from a given source is $I.\,$ If on passing through 36 mm of lead its intensity is reduced to $\frac{I}{8},$then what will be the thickness of lead which reduces its intensity to $\frac{I}{2}?$

A) 6 mm

B) 9 mm

C) 12 mm

D) 18 mm

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• question_answer20) An unpolarized beam of light is incident on a group of four polarizing sheets, which are arranged in such a way that the characteristic direction of each polarizing sheet makes an angle of ${{30}^{o}}.$with that of the preceding sheet. The fraction of incident unpolarized light transmitted is

A) $\frac{27}{128}$

B) $\frac{128}{27}$

C) $\frac{37}{128}$

D) $\frac{128}{37}$

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• question_answer21) Two coherent sources of intensity ratio p interfere. Then, the value$({{I}_{\max }}-{{I}_{\min }})/({{I}_{\max }}+{{I}_{\min }})$is

A) $\frac{1+\beta }{\sqrt{\beta }}$

B) $\sqrt{\frac{1+\beta }{\beta }}$

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

D) $\frac{2\sqrt{\beta }}{1+\beta }$

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• question_answer22) A luminous object is placed at a distance of 30 cm from the convex lens of focal length 20 cm. On the other side of the lens, at what distance from the lens a convex mirror of radius of curvature 10 cm be placed in order to have an upright image of the object coincident with it?

A) 60 cm

B) 50 cm

C) 30 cm

D) 20 cm

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• question_answer23) If a charge $-150\text{ }nC$is given to a concentric spherical shell and a charge $+\text{ }50\text{ }nC$is placed at its centre, then the charge on inner and outer surface of the shell is

A) $50\,nC,100\,nC$

B) $~-\text{ }50\,nC,-\text{ }100\,nC$

C) $~50\text{ }nC,\text{ }200\text{ }nC$

D) $~-\text{ }50\,nC,-200\text{ }nC$

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• question_answer24) Find out the equivalent resistance between A and B in the network of resistances shown in adjoining figure

A) $25\,\Omega$

B) $10\,\Omega$

C) $5\,\Omega$

D) None of these

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• question_answer25) In the adjoining figure, if 10 calorie heat is produced per second in, $5\,\Omega$resistor due to the flow of current through it, then the heat produced in $6\,\Omega$ resistor is

A) $\text{1 cal/s}$

B) $\text{2 cal/s}$

C) $\text{3 cal/s}$

D) $\text{4 cal/s}$

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• question_answer26) A rod of length L rotates about an axis passing through one of its ends and perpendicular to its plane. If the linear mass density of the rod varies as $\rho =(A{{r}^{3}}+B)\,kg/m,$then the moment of inertia of the rod about the given axis of rotation is

A) $\frac{{{L}^{3}}}{3}\left[ \frac{A{{L}^{3}}}{2}+B \right]$

B) $\frac{L}{3}\left[ \frac{A{{L}^{2}}}{2}+B \right]$

C) $\frac{{{L}^{3}}}{3}\left[ \frac{A}{2}+B \right]$

D) None of the above

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• question_answer27) If a force of 4 N is applied on a body of mass $20\text{ }kg,$ then the work done in 3rd second will be

A) 1.2 J

B) 2 J

C) 4 J

D) 16 J

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• question_answer28) A body is projected with velocity ${{\upsilon }_{1}}$from the point A, another body at the same time is projected vertically upwards from B with velocity 1:2 as shown in adjoining figure. If the point B lies vertically below the highest point C, then for both bodies to collide the ratio $\frac{{{\upsilon }_{2}}}{{{\upsilon }_{1}}}$ should be

A) 0.5

B) 1

C) $\frac{\sqrt{3}}{2}$

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

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• question_answer29) A police van moving on a highway with a speed of 30 km/h fires a bullet at a thief s car speeding away in the same direction with a speed of 192 km/h. If the muzzle speed of the bullet is 150 km/h, with what speed does the bullet hit the thief s car?

A) 105 m/s

B) 205 m/s

C) 210 m/s

D) 250 m/s

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• question_answer30) A machine gun of mass 10 kg fires 30 g bullets at the rate of 6 bullets/s with a speed of 400 m/s. The force required to keep the gun in position will be

A) 30 N

B) 40 N

C) 72 N

D) 400 N

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• question_answer31) A body of mass 0.1 kg when rotated in a circular path of diameter 1.0 m on a frictionless horizontal plane by means of string, makes 10 revolutions in 31.4 seconds. The centripetal force acting on the body will be

A) 0.2N

B) 0.1 N

C) 2 N

D) 1 N

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• question_answer32) A plane electromagnetic wave propagating in $x\,(-)$direction as a wave function (in SI units) is given as $\psi (x,t)={{10}^{3}}\sin \pi (3\times {{10}^{6}}x-9\times {{10}^{4}}t)$ The speed of the wave is

A) $3\times {{10}^{5}}\,m/s$

B) $3\times {{10}^{7}}\,m/s$

C) $3\times {{10}^{8}}\,m/s$

D) $3\times {{10}^{14}}\,m/s$

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• question_answer33) A thin lens of focal length $f$and aperture diameter $d$ forms an image of intensity$I.$If the central part of the aperture upto diameter $d/2$is blocked by an opaque paper, then the new focal length and intensity of image will be

A) $\frac{f}{2},\frac{l}{2}$

B) $\frac{f}{2},\frac{3}{4}l$

C) $f,\frac{l}{2}$

D) $f,\frac{3}{4}l$

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• question_answer34) Light of wavelength $\lambda$ strikes a photo sensitive surface and electrons are ejected with kinetic energy E. If the kinetic energy is to be increased to 2E, then the wavelength must be changed to $\lambda ,$where

A) $\lambda >\lambda$

B) $\lambda =\frac{\lambda }{2}$

C) $\lambda =2\lambda$

D) $\frac{\lambda }{2}<\lambda <\lambda$

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• question_answer35) In a photo electric effect experiment, the maximum kinetic energy of the emitted electrons is $1\,eV$for incoming radiation of frequency ${{v}_{0}}$and $\text{3 eV}$for incoming radiation of frequency $\text{3}{{\text{V}}_{0}}/2.$ What is the maximum kinetic energy of the electrons emitted for incoming radiations of frequency $\text{9}{{\text{V}}_{0}}/4?$

A) 3 eV

B) 4.5 eV

C) 6 eV

D) 9 eV

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• question_answer36) If the energy of hydrogen atom in the ground state is $-13.6\text{ eV,}$ then energy of $\text{H}{{\text{e}}^{+}}$ ion in first excited state will be

A) $6.8\,eV$

B) $-13.6\,eV$

C) $-27.2\,eV$

D) $-54.4\,eV$

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• question_answer37) In a nuclear fission, 0.1% mass is converted into energy. The energy released by the fission of 1 kg mass will be

A) $9\times {{10}^{3}}\,J$

B) $9\times {{10}^{16}}\,J$

C) $9\times {{10}^{17}}\,J$

D) $9\times {{10}^{19}}\,J$

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• question_answer38) For a transistor in common base, the current gain is 0.95. If the load resistance is $400\,k\Omega$ and input resistance is $200\,k\Omega ,$ then the voltage gain and power gain will be

A) 1900 and ,1800

B) 1900 and 1805

C) 5525 and 3591.

D) 1805 and 1900

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• question_answer39) In the middle of the depletion layer of a reverse biased $p-n$junction, the

A) potential is zero

B) potential is maximum

C) electric field is maximum

D) electric field is zero

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• question_answer40) In amplitude modulation, the total modulation index should not exceed one because

A) the signal will be distorted

B) the amplifier will be damaged

C) the signal will die out quickly

D) the system will fail

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• question_answer41) Let a beam of wavelength $\lambda$ falls on parallel reflecting planes with separation $d,$then the angle $\theta$ that the beam should make with the planes so that reflected beams from successive planes may interfere constructively should be (where,$n=1,2,...$)

A) ${{\cos }^{-1}}\left( \frac{n\lambda }{2d} \right)$

B) ${{\sin }^{-1}}\left( \frac{n\lambda }{2d} \right)$

C) ${{\sin }^{-1}}\left( \frac{n\lambda }{d} \right)$

D) ${{\tan }^{-1}}\left( \frac{n\lambda }{d} \right)$

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• question_answer42) The dimensions of angular momentum/ magnetic moment are

A) $[M{{A}^{-1}}{{T}^{-1}}]$

B) $[{{M}^{-1}}A{{T}^{-1}}]$

C) $[MA{{T}^{-1}}]$

D) $[M{{A}^{-1}}T]$

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• question_answer43) A weight mg is suspended from the middle of a rope whose ends are at same level. If the rope is no longer horizontal, the minimum tension required to completely straighten the rope will be

A) $mg$

B) $\sqrt{mg}$

C) Infinite

D) zero

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• question_answer44) Two triodes having amplification factors 30 and 21 and plate resistances $5\,k\Omega$ and $4\,k\Omega$ respectively are connected in parallel. The composite amplification factor of the system is

A) 25

B) 50

C) 75

D) 100

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• question_answer45) A deflection magnetometer works on

A) Coulombs law

B) Tangent law

C) Curie law

D) The law of vibration of a magnet

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• question_answer46) If a magnet is dropped along the axial line off a horizontally held copper ring, then the acceleration of the magnet while it passing through the ring will

A) less than that due to gravity

B) equal to that due to gravity

C) more than that due to gravity

D) depend on the size of the ring and magnet

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• question_answer47) A clock which keeps correct time at $20{{\,}^{o}}C,$ is subjected to $40{{\,}^{o}}C.$If coefficient of lineal expansion, of the pendulum is $12\times {{10}^{-6}}/{{\,}^{o}}C,$then how much will it gain or loss in time?

A) 5s/day

B) 10.3s/day

C) 20.6 s/day

D) 20 min/day

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• question_answer48) The resistance of a resistance thermometel have values 2.71 and 3.70 ohms at $10{{\,}^{o}}C$and $100{{\,}^{o}}C$respectively. The temperature at which the resistance is 3.26 ohm is

A) $40{{\,}^{o}}C$

B) $50{{\,}^{o}}C$

C) $60{{\,}^{o}}C$

D) $7\,0{{\,}^{o}}C$

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• question_answer49) If the earth were to rotate faster than its present speed, the weight of an object will

A) increase at the equator but remain unchanged at the poles

B) decrease at the equator but remain unchanged at the poles

C) decrease at the poles but remain unchanged at the equator

D) increase at the pole but remain unchanged at the equator

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• question_answer50) A coil is wound on a transformer of rectangular cross-section. If all the linear dimensions of the transformer are increased by a factor 2 and the number of turns per unit length of the coil remains the same, the self inductance increases by a factor of

A) 4

B) 8

C) 12

D) 16

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• question_answer51) A drop of water is about 0.05 mL. The density of, water at room temperature is about $1.0\,\text{m}{{\text{L}}^{-1}}.$ The number of water molecules present in a drop of water are.

A) $1.67\times {{10}^{21}}{{H}_{2}}O$molecules

B) $1.67\times {{10}^{26}}{{H}_{2}}O$molecules

C) $1.806\times {{10}^{23}}{{H}_{2}}O$molecules

D) $1.806\times {{10}^{21}}{{H}_{2}}O$molecules

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• question_answer52) Which of the following forms acidic halides?

A) HF

B) HCI

C) HBr

D) HI

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• question_answer53) The maximum covalency of nitrogen is

A) 3

B) 4

C) 5

D) 6

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• question_answer54) A black compound of manganese reacts with a halogen acid to give greenish yellow gas. When excess of this gas reacts with $\text{N}{{\text{H}}_{\text{3}}}$an unstable trihalide is formed. In this process, The oxidation state of nitrogen changes from

A) $\text{0}\,\text{to}\,-3$

B) $-3\,\text{to}\,0$

C) $-3\,\text{to}\,+5$

D) $-3\,\text{to}\,+3$

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• question_answer55) Which of the following is isoelectronic pair?

A) $C{{N}^{-}},{{O}_{3}}$

B) $Cl{{O}_{2}},Br{{F}_{2}}$

C) $Br{{O}^{-}}_{2},BrF_{2}^{+}$

D) $lC{{l}_{2}},Cl{{O}_{3}}$

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• question_answer56) Bond dissociation enthalpy of $E-H$$E=$element) bonds is given below. Which of the compounds will act as strongest reducing agent?

 Compound = $N{{H}_{3}}$ $P{{H}_{3}}$ $As{{H}_{3}}$ $Sb{{H}_{3}}$ $\,{{\Delta }_{diss{{(E-H)}^{H}}(kJmo{{l}^{-1}})}}$ = 389 322 297 255

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

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

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

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

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• question_answer57) The electronic configuration of a transition element X in $+\,3$ oxidation state is $[Ar]3{{d}^{5}}.$ What is its atomic number?

A) 24

B) 25

C) 26

D) 27

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• question_answer58) Spin only magnetic moment value of $C{{r}^{3+}}$ion is

A) 2.87BM

B) 3.87 BM

C) 3.47 BM

D) 3.67 BM

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• question_answer59) There are 14 elements in actinoid series. Which of the following elements does not belong to this series?

A) U

B) Np

C) Tm

D) Fm

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• question_answer60) When $\text{0}\text{.1}\,\text{mol}\,\text{CoC}{{\text{l}}_{\text{3}}}{{\text{(N}{{\text{H}}_{\text{3}}}\text{)}}_{\text{5}}}$ is treated with excess of $\text{AgN}{{\text{O}}_{\text{3}}}\text{,0}\text{.2}\,\text{mole}$of$\text{AgCl}$ are obtained. The conductivity of solution will correspond to

A) 1:3 electrolyte,

B) 1:2 electrolyte

C) 1:1 electrolyte

D) 3:1 electrolyte

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• question_answer61) The correct IUPAC name of $[Pt{{(N{{H}_{3}})}_{2}}C{{l}_{2}}]$ is

A) diammine dichlorido platinum (II)

B) diammine dichlorido platinum (IV)

C) diammine dichlorido platinum (0)

D) dichlorido, diammine platinum (IV)

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• question_answer62) Which of the following is a network solid?

A) $S{{O}_{2}}$(solid)

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

C) Diamond

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

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• question_answer63) Which kind of defects are introduced by doping?

A) Dislocation defects

B) Schottky defects

C) Electronic defects

D) Frenkel defects

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• question_answer64) The unit of ebullioscopic constant is

A) K or K${{(molality)}^{-1}}$

B) $mol\,kg\,{{K}^{-1}}$or ${{K}^{-1}}(molality)$

C) $kg\,mo{{l}^{-1}}{{K}^{-1}}$or ${{K}^{-1}}{{(molality)}^{-1}}$

D) $Kmol\,k{{g}^{-1}}$or $K(molality)$

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• question_answer65) A beaker contains a solution of substance A. On dissolving substance A in small amount in this solution, precipitation of substance A takes place. The solution is

A) concentrated

B) saturated

C) unsaturated

D) super saturated

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• question_answer66) 4L of 0.02 M aqueous solution of NaCI was diluted by adding 1 L of water. The molality of the resultant solution is

A) 0.004

B) 0.008

C) 0.012

D) 0.016

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• question_answer67) At high concentration of soap in water, soap behave as

A) molecular solid

B) associated colloid

C) macromolecular colloid

D) lyophilic colloid

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• question_answer68) Physical adsorption of a gaseous species may change to chemical adsorption with

A) decrease in temperature

B) increase in temperature

C) increase in surface area of adsorbent

D) decrease in surface area of adsorbent

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• question_answer69) Consider the reaction $A\xrightarrow{{}}B;$the concentration of both the reactants and the products varies exponentially with time. Which of the following figures correctly describes the change in concentration of reactants and products with time?

A)

B)

C)

D)

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• question_answer70) Activation energy of a chemical reaction can be determined by

A) determining the rate constants at standard temperature

B) determining the rate constants at two temperatures

C) determining probability of collision

D) using catalyst

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• question_answer71) In the extraction of copper from its sulphide ore, the metal is formed by the reduction of $\text{C}{{\text{u}}_{\text{2}}}\text{O}$with

A) $FeS$

B) $CO$

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

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

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• question_answer72) Which of the following is not a target molecule for drug function in body?

A) Vitamins

B) Proteins

C) Lipids

D) Carbohydrates

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• question_answer73) Which of the following statements is not true about low density polythene?

A) Tough

B) Highly branched structure

C) Poor conductor of electricity

D) Hard

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• question_answer74) Biotin is an organic compound present in yeast. Its deficiency in diet causes dermatitis and paralysis. It is also known as

A) vitamin${{B}_{1}}$

B) vitamin${{B}_{12}}$

C) vitamin D

D) vitamin H

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• question_answer75) Methyl $\alpha -D-$glucoside and methyl $\beta -D-$ glucoside are

A) epimers

B) anomers

C) conformational diastereomers

D) enantiomers

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• question_answer76) The number ofdisulphide linkages present in insulin are

A) 1

B) 2

C) 3

D) 4

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• question_answer77) The source of nitrogen in Gabriel synthesis of amines is

A) sodium azide $Na{{N}_{3}}$

B) potassium phthalimide${{C}_{6}}{{H}_{4}}{{(CO)}_{2}}\bar{N}{{K}^{+}}$

C) sodium cyanide

D) potassium nitrate

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• question_answer78) Which is the most suitable reagent for the following conversion? $C{{H}_{3}}-CH=CH-C{{H}_{2}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{3}}\xrightarrow{{}}$ $C{{H}_{3}}-CH=CH-C{{H}_{2}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-OH$

A) $Zn-Hg+HCl$

B) ${{l}_{2}}+NaOH$

C) Fehlings reagent

D) $Sn+NaOH$solution

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• question_answer79) $C{{H}_{3}}-C=CH\xrightarrow[1%\,HgS{{O}_{4}}]{40%\,{{H}_{2}}S{{O}_{4}}}A\xrightarrow{\text{Isomerisation}}$ $C{{H}_{3}}COC{{H}_{3}}$ Structure of A and the type of isomerism in the above reaction are respectively.

A) prop-l-en-2-ol, metamerism

B) prop-1-en-l-ol, tautomerism

C) prop-2-en-2-ol, cis and trans isomerism

D) prop-2-en-1-ol, tautomerism

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• question_answer80) One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is

A) ethene

B) propene

C) but-1-ene

D) but-2-ene

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• question_answer81) Which of the following species can act as the strongest base?

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

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

C)

D)

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• question_answer82) IUPAC name of m-cresol is

A) benzene-1, 3-diol

B) 3-chlorophenol

C) 3-methyl phenol

D) 3-methoxyphenol

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• question_answer83) The order of reactivity of following alcohols with halogen acids is

 (i)$C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH$ (ii) $C{{H}_{3}}C{{H}_{2}}-\underset{OH}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C{{H}_{3}}$ (iii) $C{{H}_{3}}C{{H}_{2}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-OH$

A) II > I > III

B) I > III > II

C) lll > ll > l

D) l > ll > lll

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• question_answer84) The position of $-Br$in the compound in $C{{H}_{3}}CH=CHC(Br){{(C{{H}_{3}})}_{2}}$can be classified as

A) vinyl

B) secondary

C) allyl

D) aryl

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• question_answer85) Benzene does not undergo addition reactions easily because

A) it has a cyclic structure

B) it has 6H-atoms

C) double bonds in it are very strong

D) resonance stabilized system is to be preserved

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• question_answer86) Alkynes occur in nature in

A) free state

B) partially free state

C) not in free state

D) None of these

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• question_answer87) Which of the following reagents converts both acetaldehyde and acetone to alkanes?

A) $Ni/{{H}_{2}}$

B) $LiAl{{H}_{4}}$

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

D) $Zn-Hg/HCl$

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• question_answer88) ${{C}_{6}}{{H}_{6}}+C{{l}_{2}}(excess)\frac{Anhy.AlC{{l}_{3}}}{dark,cold}P$ Product, P is

A) ${{C}_{6}}{{H}_{5}}Cl$

B) ${{C}_{6}}{{H}_{4}}C{{l}_{2}}$

C) ${{C}_{6}}{{H}_{6}}C{{l}_{6}}$

D) ${{C}_{6}}C{{l}_{6}}$

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• question_answer89) An alkene A contains three $C-C,$eight $C-H-\sigma -$bonds and one $C-C-\pi -$bond. A on ozonolysis gives two moles of an aldehyde of molar mass 44 u. IUPAC name of A is

A) but-1-ene

B) but-2-ene

C) 2-methylpropane

D) None of these

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• question_answer90) Among the following which one can have a meso-form?

A) $C{{H}_{3}}CH(OH)CH(Cl){{C}_{2}}{{H}_{5}}$

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

C) ${{C}_{2}}{{H}_{5}}CH(OH)CH(OH)C{{H}_{3}}$

D) $HOC{{H}_{2}}CH(Cl)C{{H}_{3}}$

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• question_answer91) Calculate pH of $1\,M\,NaHC{{O}_{3}}.$Given ${{H}_{2}}C{{O}_{3}}+{{H}_{2}}OHCO_{3}^{-}+{{H}_{3}}{{O}^{+}};p{{K}_{1}}=6.38$$HCO_{3}^{-}+{{H}_{2}}OCO_{3}^{2-}+{{H}_{3}}{{O}^{+}};\,\,\,\,p{{K}_{2}}=10.26$

A) 8.73

B) 8.32,

C) 6.73

D) 6.32

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• question_answer92) Elements Se, Cl and S have been arranged in the order of increasing ionisation energies. Identify the correct order.

A) $S<Se<Cl$

B) $Se<S<Cl$

C) $Cl<S<Se$

D) $Se=S<Cl$

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• question_answer93) Which of the following is correct for number of electrons, number of orbitals and type of orbitals respectively in N-orbit?

A) 4, 4 and 8

B) 4, 8 and 16

C) 32,16 and 4

D) 4,16 and 32

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• question_answer94) The de-Broglie wavelength of helium atom at room temperature is

A) $6.6\times {{10}^{-34}}m$

B) $4.39\times {{10}^{-10}}m$

C) $7.34\times {{10}^{-11}}m$

D) $2.335\times {{10}^{-20}}\,m$

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• question_answer95) In which of the following pairs of molecules/ions, the central atoms have $s{{p}^{2}}$hydridisation?

A) $B{{F}_{3}}$and$NH_{2}^{-}$

B) $NO_{2}^{-}$and $N{{H}_{3}}$

C) $B{{F}_{3}}$ and$NO_{2}^{-}$

D) $NH_{2}^{-}$and ${{H}_{2}}O$

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• question_answer96) If a gas expands at constant temperature, it indicates that

A) kinetic energy of molecules decreases

B) pressure of the gas increases

C) kinetic energy of molecules remains same

D) number of the molecules of gas increases

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• question_answer97) For the reaction, ${{C}_{3}}{{H}_{8}}(g)+5{{O}_{2}}(g)\xrightarrow{{}}3C{{O}_{2}}(g)+4{{H}_{2}}O(l)$ at constant temperature, $\Delta H-\Delta E$ is

A)  $+\,3RT$

B)  $-RT$

C)  $+\,RT$

D)  $-3RT$

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• question_answer98) In which of the following equilibrium ${{K}_{c}}$and ${{K}_{p}}$are not equal?

A) $2C(s)+{{O}_{2}}(g)2C{{O}_{2}}(g)$

B) $2NO(g){{N}_{2}}(g)+{{O}_{2}}(g)$

C) $S{{O}_{2}}(g)+N{{O}_{2}}(g)S{{O}_{3}}(g)+NO(g)$

D) ${{H}_{2}}(g)+{{l}_{2}}(g)2Hl(g)$

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• question_answer99) On adding 0.1M solution each of $[A{{g}^{+}}],[B{{a}^{2+}}],(C{{a}^{2+}}]$ in$N{{a}_{2}}S{{O}_{4}}$ solution, species first precipitated is $[{{K}_{sp}}BaS{{O}_{4}}={{10}^{-11}},{{K}_{sp}}CaS{{O}_{4}}={{10}^{-6}}$$and\,{{K}_{sp}}A{{g}_{2}}S{{O}_{4}}={{10}^{-5}}]$

A) $A{{g}_{2}}S{{O}_{4}}$

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

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

D) All of these

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• question_answer100) Heat of neutralisation of HF (a weak acid) with strong base is $-\text{ }16.4\text{ }kcal.$ Calculate heat of ionisation of HF in water.

A) $-13.7\text{ }kcal$

B) $-2.7\text{ }kcal$

C) $+30.1\text{ }kcal$

D) $+\text{ }3.01\text{ }kcal$

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• question_answer101) What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?

A) 16

B) 24

C) 32

D) 8

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• question_answer102) Golden rice is a promising transgenic crop. When released for cultivation, it will help in

A) alleviation of vitamin- A deficiency

B) pest resistance

C) herbicide tolerance

D) producing a petrol-like fuel from rice

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• question_answer103) How does pruning help in making the hedge dense?

A) It induces the differentiation of new shoots from the roots lock

B) It frees axillary buds from apical dominance

C) The apical shoot grows faster after pruning

D) It releases wound hormones

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• question_answer104) Praying mentis is a good example of

A) Mullerian mimicry

B) warning colouration

C) social insects

D) camouflage

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• question_answer105) Examination of blood of a person suspected of having anaemia, shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following, is likely to alleviate his symptoms?

A) Thiamine

B) Folic acid and cobalamine

C) Riboflavin

D) Iron compounds

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• question_answer106) In which of the following fruits is the edible part the aril?

A) Custard apple

B) Pomegranate

C) Orange

D) Litchi

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• question_answer107) Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year

A) 1986

B) 1987

C) 1988

D) 1985

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• question_answer108) Which one of the following is not used for construction of ecological pyramids?

A) Dry weight

B) Number of individuals

C) Rate of energy flow

D) Fresh weight

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• question_answer109) Niche overlap indicates

A) active co-operation between two species

B) two different parasites on the same host

C) sharing of one or more resources between the two species

D) mutualism between two species

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• question_answer110) Treatment of seed at low temperature under moist conditions to break its dormancy is called

A) scarification

B) vernalisation

C) chelation

D) stratification

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• question_answer111) Which one of the following is not included under in situ conservation?

A) Sanctuary

B) Botanical garden

C) Biosphere reserve

D) National park

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• question_answer112) Phenotype of an organism is the result of

A) mutations and linkages

B) cytoplasmic effects and nutrition

C) environmental changes and sexual dimorphism

D) genotype and environment interactions

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• question_answer113) Moss peat is used as a packing material for sending flowers and live plants to distant places because

A) it is easily available

B) it is hygroscopic

C) it reduces transpiration

D) it serves as a disinfectant

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• question_answer114) A common structural feature of vessel elements and sieve tube elements is

A) thick secondary walls

B) pores on lateral walls

C) presence of P-protein

D) enucleate condition

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• question_answer115) In which mode of inheritance do you expect more maternal influence among the offspring?

A) Autosomal

B) Cytoplasmic

C) Y-linked

D) X-linked

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• question_answer116) Conifers differ from grasses in the

A) production of seeds from ovules

B) lack of xylem tracheids

C) absence of pollen tubes

D) formation of endosperm before fertilization

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• question_answer117) In maize, hybrid vigour is exploited by

A) bombarding the protoplast with DNA

B) crossing of two inbreed parental lines

C) harvesting seeds from the most productive plants

D) inducing mutations

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• question_answer118) Amino acid sequence, in protein synthesis is decided by the sequence of

A) $tRNA$

B) $mRNA$

C) $cDNA$

D) $rRNA$

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• question_answer119) How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to $C{{O}_{2}}$and ${{H}_{2}}O$yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal?

A) Two

B) Thirty

C) Fifty seven

D) One

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• question_answer120) Which one of the following is the correctly matched pair of an endangered animal and a National Park?

A) Lion - Corbett National Park

B) Rhinoceros - Kaziranga National Park

C) Wild ass - Dudhwa National Park

D) Great Indian - Keoladeo National Park bustard

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• question_answer121) A person showing unpredictable moods, out bursts of emotion, quarrel some behaviour and conflicts with others is suffering from

A) schizophrenia

B) Borderline Personality Disorder (BPD)

C) mood disorders

D) addictive disorders

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• question_answer122) Pentamerous, actinomorphic flowers, bicarpillary ovary with oblique septa and fruit a capsule or berry are characteristic features of

A) Asteraceae

B) Brassicaceae

C) Solanaceae

D) Liliaceae

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• question_answer123) People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude of 5400 metres have around 8 million. This is because at high altitude

A) people get pollution-free air to breathe and more oxygen is available

B) atmospheric${{\text{O}}_{\text{2}}}$ level is less and hence more RBCs are needed to absorb the required amount of ${{\text{O}}_{\text{2}}}$to survive

C) there is more UV radiation which enhances RBC production

D) people eat more nutritive food, therefore more RBCs are formed

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• question_answer124) An important evidence in favour of organic evolution is the occurrence of

A) homologous and vestigial organs

B) analogous and vestigial organs

C) homologous organs only

D) homologous and analogous organs

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• question_answer125) Which one of the following is not a living fossil?

A) King crab

B) Sphenodon

C) Archaeopteryx

D) Peripatus

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• question_answer126) Which one of the following is a matching set of a phylum and its three examples?

A) Cnidaria - Bonellia, Physalia, Aurelia

B) Platyhelminthes - Planaria/Schistosoma, Enterobius

C) Mollusca - Loligo, Teredo, Octopus

D) Porifera - Spongilla, Euplectella, Pennatula

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• question_answer127) Which of the following pairs of an animal and a plant represents endangered organisms in India?

A) Bentinckia - Red panda nicobarica

B) Tamarind - Rhesus monkey

C) Cinchona - Leopard

D) Banyan - Black buck

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• question_answer128) Jurassic period of the Mesozoic era is characterised by

A) gymnosperms are dominant plants and first birds appear

B) radiation of reptiles and origin of mammal like reptiles

C) dinosaurs become extinct and angiosperms appear

D) flowering plants and first dinosaurs appear

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• question_answer129) Which of the following statements regarding cilia is not correct?

A) The organised beating of cilia is controlled by fluxes of $C{{a}^{2+}}$across the membrane

B) Cilia are hair-like cellular appendages

C) Microtubules of cilia are composed of tubulin

D) Cilia contain an outer ring of nine doublet microtubules surrounding two single microtubules

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• question_answer130) Microbes found to be very useful in genetic engineering are

A) Escherichia coli and Agrobacterium tumefaciens

B) Vibrio cholerae and a tailed bacteriophage

C) Diplococcus sp. and Pseudomonas sp

D) Crown gall bacterium and Caenorhabditi selegans

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• question_answer131) Which of the following environmental conditions are essential for optimum growth of Mucoron a piece of bread?

 (i) Temperature of about $25{{\,}^{o}}C$ (ii) Temperature of about $5{{\,}^{o}}C$ (iii) Relative humidity of about 5% (iv) Relative humidity of about 95%Vvi (v) A shady place (vi) A brightly illuminated place
Choose the answer from the following options

A) I, III and V

B) I, IV and V

C) II, IV and V

D) II, III and VI

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• question_answer132) During photorespiration, the oxygen consuming reaction(s) occur in

A) stroma of chloroplasts and mitochondria

B) stroma of chloroplasts and peroxisomes

C) grana of chloroplasts and peroxisomes

D) stroma of chloroplasts

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• question_answer133) Sertoli cells are regulated by the pituitary hormone known as

A) FSH

B) GH

C) Prolactin

D) LH

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• question_answer134) The contractile protein of skeletal muscle involving ATPase activity is

A) tropomyosin

B) myosin

C) $\alpha -$actin

D) troponin

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• question_answer135) One gene-one enzyme hypothesis was postulated by

A) R Franklin

B) Hershey and Chase

C) A Garrod

D) Beadle and Tatum

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• question_answer136) Test cross involves

A) crossing between two genotypes with recessive trait

B) crossing between two F, hybrids

C) crossing the ${{F}_{1}}$hybrid with a double recessive genotype

D) crossing between two genotypes with dominant trait

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• question_answer137) Areolar connective tissue joins

A) fat body with muscles

B) integument with muscles

C) bones with muscles

D) bones with bones

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• question_answer138) Cri-du-chat syndrome in humans is caused by the

A) fertilisation of an XX egg by a normal Y- bearing sperm

B) loss of half of the short arm of chromosome 5

C) loss of half of the long arm of chromosome 5

D) trisomy of 21 st chromosome

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• question_answer139) Restriction endonuclease

A) cuts the DNA molecule randomly

B) cuts the DNA molecule at specific sites

C) restricts the synthesis of DNA inside the nucleus

D) synthesises DNA

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• question_answer140) Which of the following is an accumulation and release centre of neurohormones?

A) Posterior pituitary lobe

B) Intermediate lobe of the pituitary

C) Hypothalamus

D) Anterior pituitary lobe

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• question_answer141) Which one of the following has an open circulatory system?

A) Pheretima

B) Periplaneta

C) Hirudinaria

D) Octopus

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• question_answer142) Which hormone causes dilation of blood vessels, increased oxygen consumption and glycogenolysis?

A) ACTH

B) Insulin

C) Adrenaline

D) Glucagon

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• question_answer143) The causative agent of mad-cow disease is a

A) bacterium

B) prion

C) worm

D) virus

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• question_answer144) Biradial symmetry and lack of cnidoblasts are the characteristics of

A) Starfish and sea anemone

B) Ctenoplana and Beroe

C) Aurlia and Paramecium

D) Hydra and starfish

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• question_answer145) The arrangement of the nuclei in a normal embryo sac in the dicot plants is

A) $~2+4+2$

B) $3+2+3$

C) $2+3+3$

D) $3+3+2$

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• question_answer146) Triticale, the first man-made cereal crop, has been obtained by crossing wheat with

A) rye

B) pearl millet

C) sugar cane

D) barley

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• question_answer147) HIV that causes AIDS, first starts destroying

A) B-lymphocytes

B) leucocytes

C) thrombocytes

D) helper T-lymphocytes

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• question_answer148) In which one of the following sets of animals do all the four give birth to young ones?

A) Lion, bat, whale, ostrich

B) Platypus, penguin, bat, hippopotamus

C) Shrew, bat, cat, kiwi

D) Kangaroo, hedgehog, dolphin, loris

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• question_answer149) Two common characters found in centipede, cockroach and crab are

A) compound eyes and anal cerci

B) jointed legs and chitinous exoskeleton

C) green gland and trachea

D) book lungs and antennae

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• question_answer150) Angiotensinogen is a protein produced and secreted by

A) macula densa cells

B) endothelial cells (cells lining the blood vessels)

C) liver cells

D) juxtaglomerular (JG) cells

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