# Solved papers for WB JEE Medical WB JEE Medical Solved Paper-2012

### done WB JEE Medical Solved Paper-2012

• question_answer1) In a mercury thermometer, the ice point (lower fixed point) is marked as ${{10}^{o}}$ and the steam point (upper fixed point) is. Marked as${{130}^{o}}$. At ${{40}^{o}}$temperature, what will this thermometer read?

A) ${{78}^{o}}$

B) ${{66}^{o}}$

C) ${{62}^{o}}$

D) ${{58}^{o}}$

• question_answer2) The magnetic flux linked with a coil satisfies the relation $\text{o }\!\!|\!\!\text{ =}\,\text{4}{{\text{t}}^{2}}+6t+9\,Wb,$ where t is the time in second. The emf induced in the coil at $t=2s$ is

A) 22V

B) 18V

C) 16V

D) 40V

• question_answer3) Water is flowing through a very narrow tube. The velocity of water below which the flow remains a streamline flow is known as

A) relative velocity

B) terminal velocity

C) critical velocity

D) particle velocity

• question_answer4) If the velocity of light in vacuum is $3\times {{10}^{8}}m{{s}^{-1}},$ the time taken (in nanosecond) to travel through a glass plate of thickness $10\,cm$and refractive index 1.5 is

A) 0.5

B) 1.0

C) 2.0

D) 3.0

• question_answer5) A charge +q is placed at the origin 0 of $x-y$axes as shown in the figure. The work done in taking a charge Q from A to B along the straight line AB is

A) $\frac{qQ}{4\pi {{\varepsilon }_{0}}}\left( \frac{a-b}{ab} \right)$

B) $\frac{qQ}{4\pi {{\varepsilon }_{0}}}\left( \frac{b-a}{ab} \right)$

C) $\frac{qQ}{4\pi {{\varepsilon }_{0}}}\left( \frac{b}{{{a}^{2}}}-\frac{1}{b} \right)$

D) $\frac{qQ}{4\pi {{\varepsilon }_{0}}}\left( \frac{a}{{{b}^{2}}}-\frac{1}{b} \right)$

• question_answer6) What current will flow through the $2\,k\Omega$ resistor in the circuit shown in the figure?

A) 3 mA

B) 6 mA

C) 12 mA

D) 36 Ma

• question_answer7) In a region, the intensity of an electric field is given by $E=2i+3j+k$in $N{{C}^{-1}}.$The electric flux through a surface $S=10i\,{{m}^{2}}$in the region is

A) $5\,N{{m}^{2}}{{C}^{-1}}$

B) $10\,N{{m}^{2}}{{C}^{-1}}$

C) $15\,N{{m}^{2}}{{C}^{-1}}$

D) $20\,N{{m}^{2}}{{C}^{-1}}$

• question_answer8) A train approaching a railway platform with a speed of $20\,m{{s}^{-1}}$ starts blowing the whistle. Speed of sound in air is $340\,m{{s}^{-1}}.$ If the frequency of the emitted sound from the whistle is 640 Hz, the frequency of sound to a person standing on the platform will appear to be

A) 600 Hz

B) 640 Hz

C) 680 Hz

D) 720 Hz

• question_answer9) A straight wire of length 2 m carries a current of 10 A. If this wire is placed in a uniform magnetic field of 0.15 T making an angle of ${{45}^{o}}$ with the magnetic field, the applied force on the-wire will be

A) 1.5 N

B) 3N

C) $3\sqrt{2}\,N$

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

• question_answer10) What is the phase difference between two simple harmonic motions represented by ${{x}_{1}}=A\sin \left( \omega t+\frac{\pi }{6} \right)$and ${{x}_{2}}=A\cos (\omega t)$?

A) $\frac{\pi }{6}$

B) $\frac{\pi }{3}$

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

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

• question_answer11) Heat is produced at a rate given by H in a resistor when it is connected across a supply of voltage V. If now the resistance of the resistor is doubled and the supply voltage is made V/3, then the rate of production of heat in the resistor will be

A) H/18

B) H/9

C) 6H

D) 18H

• question_answer12) Two elements A and B with atomic numbers ${{Z}_{A}}$and ${{Z}_{B}}$are used to produce characteristic X-rays with frequencies ${{v}_{A}}$and ${{v}_{B}}$respectively. If ${{Z}_{A}}:{{Z}_{B}}=1:2,$ then ${{v}_{A}}:{{v}_{B}}$will be

A) $1:\sqrt{2}$

B) 1: 8

C) 4:1

D) 1: 4

• question_answer13) The de-Broglie wavelength of an electron moving with a velocity c/2 (c = velocity of light in vacuum) is equal to the wavelength of a photon. The ratio of the kinetic energies of electron and photon is

A) 1:4

B) 1:2

C) 1:1

D) 2:1

• question_answer14) Two infinite parallel metal planes, contain electric charges with charge densities $+\sigma$and $-\sigma$ respectively and they are separated by a small distance in air. If the permittivity of air is ${{\varepsilon }_{0}},$then the magnitude of the field between the two planes with its direction will be

A) $\sigma /{{\varepsilon }_{0}}$towards the positively charged plane

B) $\sigma /{{\varepsilon }_{0}}$towards the negatively charged plane

C) $\sigma /(2{{\varepsilon }_{0}})$towards the positively charged plane

D) 0 and towards any direction

• question_answer15) A box of mass 2 kg is placed on the roof of a car. The box would remain stationary until the carattains a maximum acceleration. Coefficient of static friction between the box and the roof of the car is 0.2 and $g=10\,m{{s}^{-2}}.$ This maximum acceleration of the car, for the box to remain stationary, is

A) $8\,m{{s}^{-2}}$

B) $6\,m{{s}^{-2}}$

C) $4\,m{{s}^{-2}}$

D) $2\,m{{s}^{-2}}$

• question_answer16) The dimension of angular momentum is

A) $[{{M}^{0}}{{L}^{1}}{{T}^{-1}}]$

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

C) $[{{M}^{1}}{{L}^{2}}{{T}^{1}}]$

D) $[{{M}^{2}}{{L}^{1}}{{T}^{-2}}]$

• question_answer17) If $A=B+C$have scalar magnitudes of 5, 4 3 units respectively, then the angle between A and C is

A) ${{\cos }^{-1}}(3/5)$

B) ${{\cos }^{-1}}(4/5)$

C) $\pi /2$

D) ${{\sin }^{-1}}(3/4)$

• question_answer18) A particle is travelling along a straight line OX. The distance $x$ (in metre) of the particle from O at a time t is given by $x=37+27t-{{t}^{3}},$whem is time in seconds. The distance of the particle from O when it comes to rest is

A) 81 m

B) 91m

C) 101m

D) 111m

• question_answer19) A particle is projected from the ground with a kinetic energy E at an angle of ${{60}^{o}}$ with the horizontal. Its kinetic energy at the highest point of its motion will be

A) $E/\sqrt{2}$

B) $E/2$

C) $E/4$

D) $E/8$

• question_answer20) A bullet on penetrating 30 cm into its target loses its velocity by 50%. What additional distance will it penetrate into the target before comes to rest?

A) 30 cm

B) 20 cm

C) 10 cm

D) 5 cm

• question_answer21) When a spring is stretched by 10 cm, the potential energy stored is E. When the spring is stretched by 10 cm more, the potential energy stored in the spring becomes

A) 2E

B) 4 E

C) 6E

D) 10 E

• question_answer22) Average distance of the Earth from the Sun is ${{L}_{1}}.$ If one year of the Earth = D days, one year of another planet whose average distance from the Sun is ${{L}_{2}}$ will be

A) $D{{\left( \frac{{{L}_{2}}}{{{L}_{1}}} \right)}^{\frac{1}{2}}}days$

B) $D{{\left( \frac{{{L}_{2}}}{{{L}_{1}}} \right)}^{\frac{3}{2}}}days$

C) $D{{\left( \frac{{{L}_{2}}}{{{L}_{1}}} \right)}^{\frac{2}{3}}}days$

D) $D\left( \frac{{{L}_{2}}}{{{L}_{1}}} \right)days$

• question_answer23) A spherical ball A of mass 4 kg, moving along a straight line strikes another spherical ball B of mass 1 kg at rest. After the collision, A and B move with velocities ${{v}_{1}}\,m{{s}^{-1}}$and ${{v}_{2}}\,m{{s}^{-1}}$ respectively making angles of ${{30}^{o}}$ and ${{60}^{o}}$ with respect to the original direction of motion of A. The ratio $\frac{{{v}_{1}}}{{{v}_{2}}}$ will be

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

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

C) $\frac{1}{\sqrt{3}}$

D) $\sqrt{3}$

• question_answer24) The decimal number equivalent to a binary number 1011001 is

A) 13

B) 17

C) 89

D) 178

• question_answer25) The frequency of the first overtone of a closed pipe of length ${{l}_{1}}$is equal to that of the first overtone of an open pipe of length ${{l}_{2}}.$The ratio of their lengths $({{l}_{1}}:{{l}_{2}})$ is

A) 2: 3

B) 4:5

C) 3:5

D) 3:4

• question_answer26) The $I-V$characteristics of a metal wire at two different temperatures (${{T}_{1}}$and${{T}_{2}}$) are given in the adjoining figure. Here, we can conclude that

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

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

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

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

• question_answer27) In a slide caliper, $(m+1)$number of vernier divisions is equal to m number of smallest main scale divisions. If d unit is the magnitude of the smallest main scale division, then the magnitude of the vernier constant is

A) $d/(m+1)unit$

B) $d/munit$

C) $md/(m+1)unit$

D) $(m+1)d/m\,\text{unit}$

• question_answer28) From the top of a tower, 80 m high from the ground, a stone is thrown in the horizontal direction with a velocity of $8\,m{{s}^{-1}}.$The stone reaches the ground after a time t and falls at a distance of d from the foot of the tower. Assuming $=10m/{{s}^{2}},$ the time t and distance d are given respectively by

A) 6 s, 64 m

B) 6 s, 48 m

C) 4s, 32m

D) 4s, 16m

• question_answer29) A Wheatstone bridge has the resistances $10\,\Omega ,\,10\,\Omega ,\,$ and $30\Omega$ in its four arms. What resistance joined in parallel to the $30\Omega$ resistance will bring it to the balanced condition?

A) $2\,\Omega$

B) $5\,\Omega$

C) $10\,\Omega$

D) $15\,\Omega$

• question_answer30) An electric bulb marked as $50\,W-200\,V$is connected across a 100 V supply. The present power of the bulb is

A) 37.5 W

B) 25 W

C) 12.5 W

D) 10 W

• question_answer31) A magnetic needle is placed in a uniform magnetic field and is aligned with the field. The needle is now rotated by an angle of ${{60}^{o}}$ and the work done is W. The torque on the magnetic needle at this position is

A) $2\sqrt{3}\,W$

B) $\sqrt{3}\,W$

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

D) $\frac{\sqrt{3}}{4}W$

• question_answer32) In the adjoining figure, the potential difference between X and Y is 60 V. The potential difference between the points M and N will be

A) 10 V

B) 15 V

C) 20 V

D) 30 V

• question_answer33) A body when fully immersed in a liquid of specific gravity 1.2 weighs 44 gwt. The same body when fully immersed in water weighs 50 gwt. The mass of the body is

A) 36g

B) 48g

C) 64g

D) 80g

• question_answer34) When a certain metal surface is illuminated with light of frequency v, the stopping potential for photoelectric current is ${{V}_{0}}.$ When the same surface is illuminated by light of frequency $\frac{v}{2},$the stopping potential is $\frac{{{V}_{0}}}{4}.$The threshold frequency for photoelectric, emission is

A) $\frac{v}{6}$

B) $\frac{v}{3}$

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

D) $\frac{4v}{3}$

• question_answer35) Three blocks of masses 4 kg, 2 kg, 1 kg respectively are in contact on a frictionless table as shown in the figure. If a force of 14 N is applied on the 4 kg block, the contact force between the 4 kg and the 2 kg block will be

A) 2N

B) 6N

C) 8N

D) 14N

• question_answer36) Let L be the length and d be the diameter of cross-section of a wire. Wires of the same material with different L and d are subjected to the same tension along the length of the wire. In which of the following cases, the extension of wire will be the maximum?

A) = 200 cm, d = 0.5 mm

B) L = 300 cm, d = 1.0 mm

C) L = 50 cm, d = 0.05 mm

D) L = 100 cm, d = 0.2mm

• question_answer37) An object placed in front of a concave mirror at a distance of $x\,cm$from the pole gives a 3 times magnified real image. If it is moved to a distance of $(x+5)\,cm,$ the magnification of the image becomes 2. The focal length of the mirror is

A) 15 cm

B) 20 cm

C) 25 cm

D) 30 cm

• question_answer38) 22320 cal of heat is supplied to 100 g of ice at $0{{\,}^{o}}C.$ If the latent heat of fusion of ice is $80\,\text{cal}\,{{g}^{-1}}$ and latent heat of vaporization of water is $540\,\text{cal}\,{{g}^{-1}},$ the final amount of water thus obtained and its temperature respectively are

A) $8\text{ }g,\text{ }100{{\,}^{o}}C$

B) $100\text{ }g,\text{ }90{{\,}^{o}}C$

C) $92\text{ }g,\text{ }100{{\,}^{o}}C$

D) $82\text{ }g,\text{ }100{{\,}^{o}}C$

• question_answer39) A progressive wave moving along $x-$axis is represented by y$y=A\,\sin \left[ \frac{2\pi }{\lambda }(vt-x) \right].$ The wavelength $(\lambda )$ at which the maximum particle velocity is 3 times the wave velocity is

A) $A/3$

B) $2A/(3\pi )$

C) $\left( \frac{3}{4} \right)\pi A$

D) $(2/3)\pi A$

• question_answer40) Two radioactive substances A and B have decay constants $5\lambda$ and$\lambda$ respectively. At $t=0,$they have the same number of nuclei. The ratio of number of nuclei of A to that of B will be ${{(1/e)}^{2}}$ after a time interval of

A) $\frac{1}{\lambda }$

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

C) $\frac{1}{3\lambda }$

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

• question_answer41) Li-occupies higher position in the electrochemical series of metals as compared to Cu since

A) The standard reduction potential of $L{{i}^{+}}Li$is lower than that of $C{{u}^{2+}}/Cu$

B) the standard reduction potential of $C{{u}^{2+}}/Cu$is lower than that of $Li/Li$

C) the standard oxidation potential of $Li/L{{i}^{+}}$is lower than that of $Cu/C{{u}^{2+}}$

D) Li is smaller in size as compared to Cu

• question_answer42) ${{\,}_{11}}N{{a}^{24}}$is radioactive and it decays to

A) ${{\,}_{8}}{{F}^{20}}$and a-particles

B) ${{\,}_{13}}A{{l}^{24}}$and positron

C) ${{\,}_{11}}N{{a}^{23}}$and neutron

D) ${{\,}_{12}}M{{g}^{24}}$and $\beta -$particles

• question_answer43) The paramagnetic behaviour of ${{B}_{2}}$ is due to the presence of

A) two unpaired electrons in ${{\pi }_{b}}\,MO$

B) two unpaired electrons in $\overset{*}{\mathop{\pi }}\,\,MO$

C) two unpaired electrons in $\overset{*}{\mathop{\sigma }}\,MO$

D) two unpaired electrons in ${{\sigma }_{b}}MO$

• question_answer44) A 100 mL $0.1=(M)$ solution of ammonium acetate is diluted by adding 100 mL of water. The pH of the resulting solution will be ($p{{K}_{a}}$ acetic acid is nearly equal to$p{{K}_{b}}$of$N{{H}_{4}}OH$)

A) 4.9

B) 5.0

C) 7.0

D) 10.0

• question_answer45) which one of the following statements is true?

A) ${{C}_{1}}-{{C}_{2}}$ bond is a$s{{p}^{3}}-s{{p}^{3}}-\sigma -bond$

B) ${{C}_{2}}-{{C}_{3}}$bond is$s{{p}^{3}}-s{{p}^{2}}-\sigma -bond$

C) ${{C}_{1}}-{{C}_{2}}$ bond is a $s{{p}^{3}}-s{{p}^{2}}-\sigma -bond$

D) ${{C}_{1}}-{{C}_{2}}$bond is a $s{{p}^{2}}-s{{p}^{2}}-\sigma -bond$

• question_answer46) The well known compounds, $(+)\,-$lactic acid and $(-)\,-$ lactic acid, have the same molecular formula, ${{C}_{3}}{{H}_{6}}{{O}_{3}}.$The correct relationship between them is

A) constitutional isomerism

B) geometrical isomerism

C) identicalness

D) optical isomerism

• question_answer47) The stability of $M{{e}_{2}}C=C{{H}_{2}}$is more than that of $MeC{{H}_{2}}CH=C{{H}_{2}}$due to

A) inductive effect of the Me groups

B) resonance effect of the Me groups

C) hyperconjugative effect of the Me groups

D) resonance as well as inductive effect of the Me groups

• question_answer48) Which one of the following characteristics belongs to an electrophile?

A) It is any species having electron deficiency which reacts at an electron rich C-centre

B) It is any species having electron enrichment, that reacts at an electron deficient C-centre

C) It is cationic in nature

D) It is anionic in nature

• question_answer49) Which one of the. following methods is used to prepare $M{{e}_{3}}COEt$with a good yield?

A) Mixing EtONa with $M{{e}_{3}}CCl$

B) Mixing $M{{e}_{3}}CONa$with $EtCl$

C) Heating a mixture of (1:1) EtOH and $M{{e}_{3}}COH$in the presence of cone. ${{H}_{2}}S{{O}_{4}}$

D) Treatment ofMe3COHwith $EtMgI$

• question_answer50) 58.4 g of NaCl and 180 g of glucose were separately dissolved in 1000mL of water. Identify the correct statement regarding the elevation of boiling point (b.p) of the resulting solutions.

A) NaCI solution will show higher elevation of boiling point

B) Glucose solution will show higher elevation of boiling point

C) Both the solutions will show equal elevation of boiling point

D) The boiling point elevation will be shown by neither of the solutions

• question_answer51) Equal weights of $C{{H}_{4}}$and ${{H}_{2}}$are mixed in an empty container at $25{{\,}^{o}}C.$the fraction of the total pressure exerted by ${{H}_{2}}$ is

A) 1/9

B) 1/2

C) 8/9

D) 16/17

• question_answer52) Which of the following will show a negative deviation from Raoults law?

A) Acetone-benzene

B) Acetone-ethanol

C) Benzene-methanol

D) Acetone-chloroform

• question_answer53) In a reversible chemical reaction at equilibrium, if the concentration of any one of the reactants is doubled, then the equilibrium constant will

A) also be doubled

B) be halved

C) remains the same

D) becomes one-fourth

• question_answer54) Identify the correct statement from the following in a chemical reaction.

A) The entropy always increases

B) The change in entropy along with suitable change in enthalpy decides the rate of reaction

C) The enthalpy always decreases

D) Both the enthalpy and the entropy remain constant

• question_answer55) Which one of the following is wrong about molecularity of a reaction?

A) It may be whole number or fractional

B) It is calculated from reaction mechanism

C) It is the number of molecules of the reactants taking part in a single step chemical reaction

D) It is always equal to the order of elementary reaction

• question_answer56) Which of the following does not represent the mathematical expression for the Heisenberg uncertainty principle?

A) $\Delta x.\Delta P\ge h/(4\pi )$

B) $\Delta x.\Delta v\ge h/(4\pi m)$

C) $\Delta E.\Delta t\ge h/(4\pi )$

D) $\Delta E.\Delta x\ge h/(4\pi )$

• question_answer57) The stable bivalency of Pb and trivalency of Bi is

A) due to d contraction in Pb and Bi

B) due to relativistic contraction of the 6s orbitals of Pb and Bi, leading to inert pair effect

C) due to screening effect

D) due to attainment of noble liquid configuration

• question_answer58) The equivalent weight of ${{K}_{2}}C{{r}_{2}}{{O}_{7}}$in acidic medium is expressed in terms of its molecular weight (M) as

A) M/3

B) M/4

C) M/6

D) M/7

• question_answer59) Which of the following is correct?

A) Radius of $C{{a}^{2+}}<C{{l}^{-}}<{{S}^{2-}}$

B) Radius of $C{{l}^{-}}<{{S}^{2-}}<C{{a}^{2+}}$

C) Radius of ${{S}^{2-}}=C{{l}^{-}}=C{{a}^{2+}}$

D) Radius of ${{S}^{2-}}<C{{l}^{-}}<C{{a}^{2+}}$

• question_answer60) CO is practically non-polar since

A) The 0-electron drift from C to O is almost nullified by the $\pi -$electron drift from O to C

B) the$\sigma -$electron drift from O to C is almost nullified by the $\pi -$electron drift from C to O

C) the bond moment is low

D) there is a triple bond between C and O

• question_answer61) The number of acidic protons in ${{H}_{3}}P{{O}_{3}}$are

A) 0

B) 1

C) 2

D) 3

• question_answer62) When ${{H}_{2}}{{O}_{2}}$is shaken with an acidified solution of ${{K}_{2}}C{{r}_{2}}{{O}_{7}}$in the presence of ether, the ethereal layer turns blue due to the formation of

A) $C{{r}_{2}}{{O}_{3}}$

B) $CrO_{4}^{2-}$

C) $C{{r}_{2}}{{(S{{O}_{4}})}_{3}}$

D) $Cr{{O}_{5}}$

• question_answer63) The state of hybridization of the central atom and the number of lone pairs over the central atom in $POC{{l}_{3}}$are

A) $sp,0$

B) $s{{p}^{2}},0$

C) $s{{p}^{3}},0$

D) $ds{{p}^{2}},1$

• question_answer64) Upon treatment with and aqueous NaOH, which of the following compounds will form iodoform?

A) $C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}CHO$

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

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

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

• question_answer65) Upon treatment with $Al{{(OEt)}_{3}}$followed by usual reactions (work up), $C{{H}_{3}}CHO$will produce

A) only$C{{H}_{3}}COOC{{H}_{2}}C{{H}_{3}}$

B) a mixture of $C{{H}_{3}}COOH$and EtOH

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

D) only $EtOH$

• question_answer66) Friedel-Crafts reaction using MeCl and anhydrous $AlC{{l}_{3}}$will take place most efficiently with

A) benzene

B) nitrobenzene

C) acetophenone

D) toluene

• question_answer67) Which one of the following properties is exhibited by phenol?

A) It is soluble in aq. NaOH and evolves $C{{O}_{2}}$ with aq. $NaHC{{O}_{3}}$

B) It is soluble in aq. NaOH and does not evolve $C{{O}_{2}}$withe aq. $NaHC{{O}_{3}}$

C) It is not soluble in aq. NaOH but evolves $C{{O}_{2}}$ with aq. $NaHC{{O}_{3}}$

D) It is insoluble in aq. NaOH and does not evolve $C{{O}_{2}}$with aq. $NaHC{{O}_{3}}$

• question_answer68) The basicity of aniline is weaker in comparison to that of methyl amine due to

A) hyperconjugative effect of Me-group in$MeN{{H}_{2}}$

B) resonance effect of phenyl group in aniline

C) lower molecular weight of methyl amine as compared to that of aniline

D) resonance effect of$-N{{H}_{2}}$ group in $MeN{{H}_{2}}$

• question_answer69) Under identical conditions, the ${{S}_{N}}1$reaction will occur most efficiently with

A) tert - butyl chloride

B) 1-chlorobutane

C) 2-methyl 1- chloropropane

D) 2-chlorobutane

• question_answer70) Identify the method by which $M{{e}_{3}}CC{{O}_{2}}H$can be prepared.

A) Treating 1 mole of MeCOMe with 2 moles of MeMgI

B) Treating 1 mole of $MeC{{O}_{2}}$Me with 3 moles of MeMgI

C) Treating 1 mole of MeCHO with 3 moles of MeMgI

D) Treating 1 mole of dry ice with 1 mol of $M{{e}_{3}}CMgI$

• question_answer71) 20 mL 0.1 (N) acetic acid is mixed with 10 mL (N) solution of NaOH. The pH of the resulting solution is ($p{{K}_{a}}$ of acetic acid is 4.74)

A) 3.74

B) 4.74

C) 5.74

D) 6.74

• question_answer72) In the brown ring complex$[Fe{{({{H}_{2}}O)}_{5}}(NO)]S{{O}_{4}},$ nitric oxide behaves as

A) $N{{O}^{+}}$

B) neutral NO molecule

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

D) $N{{O}^{2-}}$

• question_answer73) The most contributing tautomeric enol form of $MeCOC{{H}_{2}}C{{O}_{2}}\,Et$is

A) $C{{H}_{2}}=C(OH)C{{H}_{2}}C{{O}_{2}}Et$

B) $MeC(OH)=CHC{{O}_{2}}Et$

C) $MeCOCH=C(OH)OEt$

D) $C{{H}_{2}}=C(OH)CH=C(OH)OEt$

• question_answer74) By passing excess $C{{l}_{2}}(g)$in boiling toluene, which one of the following compounds is exclusively formed?

A)

B)

C)

D)

• question_answer75) An equimolar mixture of toluene and chlorobenzene is treated with a mixture of cone. ${{H}_{2}}S{{O}_{4}}$and cone. $HN{{O}_{3}}.$Indicate the correct statement from the following.

A) p-nitrotoluene is formed in excess

B) equimolar amounts of p-nitrotoluene and p-nitrochlorobenzene are formed

C) p-nitrochlorobenzene is formed in excess

D) m-nitrochlorobenzene is formed in excess

• question_answer76) Among the following carbocations: $P{{h}_{2}}{{C}^{+}}C{{H}_{2}}Me\,\,(I),$$PhC{{H}_{2}}C{{H}_{2}}C{{H}^{+}}Ph\,(II),$$P{{h}_{2}}CHC{{H}^{+}}Me\,\,(III)$and $P{{h}_{2}}C(Me)C{{H}_{2}}$$\,(IV),$the order of stability is

A) IV > II > I > III

B) I > II > III > IV

C) II > I > IV > III

D) I > IV > III > II

• question_answer77) Which of the following is correct?

A) Evaporation of water causes an increase in disorder of the system

B) Melting of ice causes a decrease in randomness of the system

C) Condensation of steam causes an increase in disorder of the system

D) There is practically no change in the randomness of the system when water is evaporated

• question_answer78) On passing C ampere of current for time t sec through 1 L of $2\,(M)\,CuS{{O}_{4}}$solution (atomic weight of Cu = 63. 5), the amount m of Cu (in gram) deposited on cathode will be

A) $m=Ct/(63.5\times 96500)$

B) $m=Ct/(31.25\times 96500)$

C) $m=(C\times 96500)/(31.25\times t)$

D) $m=(31.25\times C\times t)/96500$

• question_answer79) If the first ionization energy of H atom is 13.6 eV, then the second ionization energy of He atom is

A) 27.2 eV

B) 40.8 eV

C) 54.4 eV

D) 108.8 eV

• question_answer80) The weight of oxalic acid that will be required to prepare a 1000 mL (N/20) solution is

A) 126/100 g

B) 63/40 g

C) 63/20 g

D) 126/20 g

• question_answer81) Which one of the following life cycle stages of Wuchereria bancrofti is infective to man?

A) Microfilaria

B) 1st stage larva

C) 2nd stage larva

D) 3rd stage larva

• question_answer82) Which one of the following life cycle stages of malarial parasite is responsible for relapse of malarial symptoms?

A) Merozoite

B) Sporozoite

C) Hypnozoite

D) Gametocyte

• question_answer83) The correct sequence of different phases of cell cycle is

A) $S-{{G}_{1}}-{{G}_{2}}-M$

B) ${{G}_{1}}-S-{{G}_{2}}-M$

C) ${{G}_{2}}-S-{{G}_{1}}-M$

D) ${{G}_{1}}-{{G}_{2}}-S-M$

• question_answer84) Which one of the following poultry birds is not an english breed?

A) Sussex

B) Australorp

C) Orpington

D) Minorca

• question_answer85) The important gas which was absent during the formation of Earth is

A) oxygen

B) hydrogen

C) nitrogen

D) carbon dioxide

• question_answer86) In spermatogenesis, reduction division of chromosome occurs during conversion of

A) spermatogonia to primary spermatocytes

B) primary spermatocytes to secondary spermatocytes

C) secondary spermatocytes to spermatids

D) spermatids to sperms

• question_answer87) The carcinoma, a type of cancer, originates from

A) blood

B) connective tissue

C) epithelial tissue

D) lymph gland

• question_answer88) Homo erectus evolved during

A) Oligocene

B) Pliocene

C) Pleistocene

D) Miocene

• question_answer89) Which one of the following is not included under in situ conservation?

A) National park

B) Wild life sanctuary

C) Zoological garden

D) Biosphere reserve

• question_answer90) Animals are classified into hierarchical groups. In which one of the following, the largest number of species is found?

A) Genus

B) Order

C) Family

D) Cohort

• question_answer91) The blood vessel which supply oxygenated blood to cardiac tissue is

A) coronary artery

B) coronary vein

C) coronary sinus

D) pulmonary vein

• question_answer92) Vegus nerve is a

A) mixed Xcranial nerve

B) mixed XI cranial nerve

C) mixed X thoracic nerve

D) sensory X cranial nerve

• question_answer93) The number of spinal nerves in human is

A) 10 pairs

B) 12 pairs

C) 43 pairs

D) 31 pairs

• question_answer94) Third and fourth ventricles of the brain are connected by

A) aqueduct of Sylvious

B) foramen of Monro

C) foramen of Magnum

D) corpus callosum

• question_answer95) All or none law is not applicable for

A) whole skeletal muscle

B) single skeletal muscle fibre

C) whole cardiac muscle

D) single smooth muscle fibre

• question_answer96) Numerical aperture of microscope lens is expressed by

A) angular aperture only

B) refractive index only

C) both angular aperture and refrative index

D) wave length of the light used

• question_answer97) Which one of the following is not true for enzymes?

A) They act on a specific substrate

B) They are made up of fat and sugar

C) They act at a specific temperature

D) They act at a specific pH

• question_answer98) Living cells placed in isotonic solution (0.9% saline) retain their size and shape. This is based on the concept of

A) osmosis

B) diffusion

C) facilitated diffusion

D) transpiration

• question_answer99) Identify the polysaccharide with $\beta -$glycosidic bond

A) starch

B) glycogen

C) sucrose

D) cellulose

• question_answer100) Simple storage protein that coagulates upon heating but remains soluble in dilute salt solution is correctly exemplified by

A) globulin

B) albumin

C) histone

D) collagen

• question_answer101) Melting of DNA at an elevated temperature $(70{{\,}^{o}}C)$ is primarily due to the breakdown of

A) phosphodiester bonds

B) glycosidic bonds

C) disulphide bonds

D) hydrogen bonds

• question_answer102) N-acetyl muramic acid is found in

A) cell wall component of plant

B) cell wall component of Gram positive bacteria

C) cell wall component of fungi

D) viral coat material

• question_answer103) Identify the bacterium that appears violet after Gram staining

A) Salmonella enterica

B) Escherichia coli

C) Mycobacterium tuberculosis

D) Rhizobium meliloti

• question_answer104) The usual source of restriction endonucleases used in gene cloning is from

A) fungi

B) bacteria

C) plants

D) viruses

• question_answer105) Portion of apical meristem that gives rise to xylem tissue is called

A) protoxylem

B) procambium

C) metaxylem

D) tracheid

• question_answer106) For a clean environment, which one of the following is not essential?

A) Producer,

B) Consumer

C) Decomposer

D) Polluter

• question_answer107) Inulin is a type of

A) protein

B) carbohydrate

C) lipid

D) nucleic acid

• question_answer108) Higher animals cannot synthesize few fatty acids which are very essential for their growth and development. These fatty acids are typically

A) saturated

B) cyclic

C) unsaturated

D) branched

• question_answer109) Identify the membrane across which the proton $({{H}^{+}})$ gradient facilitates ATP synthesis in a typical eukaryotic cell

A) plasma membrane

B) mitochondrial inner membrane

C) mitochondrial outer membrane

D) nclear membrane

• question_answer110) What is the substrate for lipase enzyme?

A) Protein

B) Carbohydrate

C) Lipid

D) Nucleic acid

• question_answer111) After forceful inspiration, the amount of air that can be breathed out by maximum forced expiration is equal to

A) Inspiratory Reserve Volume (IRV) + Expiratory Reserve Volume (ERV) + Tidal Volume (TV) + Residual Volume (RV)

B) IRV + RV + ERV

C) IRV + TV + ERV

D) TV + RV + ERV

• question_answer112) Amount of oxygen supplied by 100 mL arterial blood while passing through the tissues is

A) $0.4-0.6\text{ }mL$

B) $4-6\text{ }mL$

C) $14-15\text{ }mL$

D) $19-20\text{ }mL$

• question_answer113) Cholecystokinin stimulates the secretion of

A) bile

B) gastric juice

C) pancreatic juice

D) succus enfericus

• question_answer114) In a normal adult human, the average cardiac output (stroke volume) is

A) 47 mL

B) 70 mL

C) 5L

D) 3.3L

• question_answer115) Humoral immunity is mediated by

A) cytotoxic T-cell

B) plasma cell

C) eosinophil

D) neutrophil

• question_answer116) The expanded name of MRI is

A) Medical Reserach Instrument

B) Magnetic Resonance Imaging

C) Magnetic Research Institute

D) Medical Resonance Imaging

A) 230 mL

B) 210 mL

C) 190 mL

D) 150 mL

• question_answer118) Bone is mainly composed of

A) iron and phosphorus

B) sulphur and calcium

C) calcium and phosphorus

D) calcium and magnesium

• question_answer119) Which one of the following is incorrect for Atherosclerosis?

A) Constriction of arterial luman reduces the blood flow

B) Loss of dilatation ability of the arterial wall and its rupture

C) Cholesterol deposition at the inner wall of the artery

D) Proliferation of the vascular muscles

• question_answer120) Which one of the following statement is incorrect?

A) Glucagon is secreted by pancreas

B) Androgen is produced by ovary

C) Thyroxine is secreted by thyroid

D) Oxytocih is secreted by pituitary

A) Juxtaglomerular cell, macula densa and lacis cell

B) Juxtaglomerular cell, Purkinje cell and chied cell

C) Juxtaglomerular cell, lacis cell and myoepithelial cell

D) Juxtaglomerular cell, macula densa and Argentaffin cell

• question_answer122) Which vitamin helps in blood coagulation?

A) Vitamin-K

B) Vitamin-C

C) Vitamin-A

D) Vitamin-D

• question_answer123) Presence of which of the following hormone in the urine confirms pregnancy?

A) Progesterone

B) Oestrogen

D) Prolactin

• question_answer124) Which one of the following is mainly responsible for the second heart sound?

A) Closure of atrioventricular valves

B) Opening of atrioventricular valves

C) Closure of semilunar valves

D) Thrust of blood on ventricular wall during atrial contraction

• question_answer125) Brunners gland is present in

A) duodenum

B) jejunum

C) ileum

D) rectum

• question_answer126) In higher plants, continuity of cytoplasm from one cell to its neighbouring cells is established through

A) apoplast

B) chloroplast

C) leucoplast

D) symplast

• question_answer127) In plant tissue culture, the callus tissues can be regenerated into complete plantlets primarily by altering the concentration of

A) sugars

B) vitamins

C) amino acids

D) hormones

• question_answer128) If you want to develop hybrid seeds within a bisexual flower, the following part needs to be removed from the same flower

A) stigma

B) ovary

C) anther

D) oviduct

• question_answer129) Xenogamy is essentially a type of

A) cleistogamy

B) allogamy

C) autogamy

D) homogamy

• question_answer130) Basic principle of developing transgenic plants and animals is to introduce the gene of interest into the nucleus of

A) somatic cell

B) vegetative cell

C) germ cell

D) body cell

• question_answer131) Who is regarded as the Father of Taxonomy?

A) John Ray

B) Carolus Linnaeus

C) AP de Candolle

D) Charles Darwin

• question_answer132) Which pairs of the following diseases are caused by two genes located on human X-chromosomes?

A) Colour blindness and phenylketonuria

B) Colour blindness and haemophilia

C) Colour blindness and albinism

D) Colour blindness and hypertrichosis

• question_answer133) Which one of the following triplet codon is known as initiation codon?

A) UUU

B) UAA

C) AUG

D) UGA

• question_answer134) Muga silk worm feeds on

A) Shorea

B) Terminalia

C) Machilus

D) Moms

• question_answer135) Mammals have originated from which of the following

A) Pisces

B) Amphibia

C) Reptilia

D) Aves

• question_answer136) Which one of the following animal phyla possesses spicule?

A) Annelida

B) Mollusca

C) Porifera

D) Platyhelminthes

• question_answer137) Fin rot of fish is caused by

A) Aeromonas

B) Pseudomonas

C) Branchiomyces

D) Xenopsylla

• question_answer138) Which one of the following animals possesses gaint chromosome?

A) Drosophila

B) Mouse

C) Pigeon

D) Elephant

• question_answer139) The vein which is formed from the capillaries of an organ and terminates into capillaries in some other organ before entering the heart is called

A) pulmonary vein

B) coronary vein

C) portal vein

D) systemic vein

• question_answer140) Which one of the following genus of insects prefer to breed in clean water and their larvae lie parallel to the surface of water?

A) Anopheles

B) Culex

C) Aedes

D) Phlebotomus

• question_answer141) During synaptic transmission of nerve impulse, neurotransmitter (P) is released from synaptic vesicles by the action of ions (Q). Choose the correct P and Q.

A) P-Acetylcholine, $Q-C{{a}^{2+}}.$

B) P-Acetylcholine, $Q-N{{a}^{+}}$

C) P-GABA, $Q-N{{a}^{+}}$

D) P-Cholinesterase, $Q-C{{a}^{2+}}$

• question_answer142) Choose the right sequential phenomena among the following during the delivery of ${{O}_{2}}$ from blood to tissue.

 I. Absorption of $C{{O}_{2}}$by the blood. II. Reaction of absorbed $C{{O}_{2}}$with ${{H}_{2}}O$to form ${{H}_{2}}C{{O}_{3}}$within RBC and its conversion into ${{H}^{+}}$and $HCO_{3}^{-}$ions. III. Reaction of absorbed $C{{O}_{2}}$with ${{H}_{2}}O$in plasma to form ${{H}_{2}}C{{O}_{3}}$and its conversion into ${{H}^{+}}$and $HCO_{3}^{-}$ions. IV. Combination of ${{H}^{+}}$ with haeme portion of $Hb{{O}_{2}}$to release${{O}_{2}}.$ V. Combination of $HCO_{3}^{-}$with haeme portion of $Hb{{O}_{2}}$to form reduced haemoglobin and release of ${{O}_{2}}.$

A) I, II and V

B) I, III and IV

C) I, II and IV

D) I, III and V

• question_answer143) Oral contraceptive pill is composed of

A) oestrogen and progesterone

B) oestrogen and testosterone

C) progesterone and testosterone

D) oestrogen and growth hormone

• question_answer144) Match the items in column I with those in Column II and choose the correct answer.

 Column I Column B A. Electroence- phalography 1. A graphic recording of the electrical activity of heart B. Electrocar- diography 2. A graphic recording of the electrical activity of brain C. Endoscopy 3. A technique that gives image automatically in multiple planes D. MRI 4. To view within the body without cutting through the overlaying tissues

A) A-2 B-1 C-4 D-3

B) A-5 B-2 C-3 D-4

C) A-1 B-3 C-2 D-4

D) A-3 B-4 C-1 D-2

• question_answer145) What are ketone bodies?

A) Acetoacetic acid, acetone and beta-hydroxybutyric acid

B) Nicotinic acid, folic acid and ascorbic acid

C) Acetone, beta-hydroxybutyryl Co-A and acetoacetic acid

D) Acetic acid, acetone and beta-hydroxybutyric acid

• question_answer146) Identify the correct sequence of events in the viral replication process.

 I. Eclipse II. Maturation III. Adsorption IV. Assembly V. Penetration VI. Lysis

A) I, II, III, iV, V, VI

B) II, I, III, IV, V, VI

C) III, V I, II, IV VI

D) III, V, VI, IV II, I

• question_answer147) Match the items in column I with those in Column II and choose the correct answer.

 Column I Column II A. Blue-green algae as biofertilizer 1. Ectomycorrhiza B. Fungi as biofertilizer 2. Thiobacillus sp. C. Free living nitrogen fixing bacteria 3. Anabaena sp. D. Phosphate solubilizing bacteria 4. Clostridium sp. 5. Azospirillum sp.

A) A-2 B-1 C-5 D-2

B) A-5 B-1 C-2 D-4

C) A-5 B-4 C-1 D-2

D) A-4 B-2 C-4 D-2

• question_answer148) A man having the genotype EEFfGgHH can produce P number of genetically different sperms and a woman of genotype HLLMmNn can generate Q number of genetically different eggs. Determine the values of P and Q.

A) P-4, Q-4

B) P-4, Q-8

C) P-8, Q-4

D) P-8, Q-8

• question_answer149) In an organism, tall phenotype is dominant over recessive dwarf phenotype and the alleles are designated as T and t, respectively. Upon crossing two different individuals, total 250 offsprings were obtained, out of which 124 displayed tall phenotype and rest were dwarf Thus, the genotype of the parents were

A) $TT\times TT$

B) $TT\times tt$

C) $Tt\times Tt$

D) $Tt\times tt$

• question_answer150) Identify the incorrect statements from the following

 I. Cymose inflorescence found in Hibiscus sp. II. Hypenthodium is found in Ficus benghalensis III. Synandrous stamen is found in Calotropis IV. Hesperidium type of fruit is mango

A) III and IV

B) I and II

C) II and III

D) I and IV

• question_answer151) How many ATP molecules will be generated in a plant system during complete oxidation of 40 moles of glucose?

A) 190

B) 380

C) 1520

D) 3040

A) left-handed helix with 12 nucleotide pairs per turn

B) right-handed helix with 11 nucleotide pairs per turn

C) right handed helix with 12 nucleotide pairs per turn

D) left-handed helix with 11 nucleotide pairs per turn

• question_answer153) Bursa fabricius is an important organ of birds. This organ is associated with

A) generation of basophil

B) production of uric acid

C) metabolism of fatty acids

D) generation of B-cell

• question_answer154) Which one of the following is a population?

A) A spider and some trapped flies in its web

B) Earthworm that lives in a grassland along with other arthropods

C) All the plants in a forest

D) All the oak trees in a forest

• question_answer155) In most simple type of canal system of Porifera, water flows through which one of the following ways?

A) Ostia$\to$ Spongocoel$\to$ Osculum$\to$ Exterior

B) Spongocoel $\to$ Ostia $\to$ Osculum $\to$ Exterior

C) Osculum$\to$ Spongocoel$\to$ Ostia $\to$ Exterior

D) Osculum $\to$ Ostia $\to$ Spongocoel $\to$ Exterior

• question_answer156) What would be the percentage of thymine in a double stranded DNA sample which ontains 20% cytosine of the total bases?

A) 10%

B) 20%

C) 30%

D) 400%

• question_answer157) Which one of the following is a correct match?

A) Filariasis - Taenia solium

B) Encephalitis - Culex vishnui

C) Malaria - Phlebotomus sp.

D) Kala-azar - Anopheles Stephens!

• question_answer158) One micrometer is equal to

A) 0.0001 mm

B) 0.001 mm

C) 0.01 mm

D) 0.00001 mm

• question_answer159) Identify the origin of sympathetic nerve fibres and the location of their ganglia.

A) They arise from thoracolumbar region of spinal cord and form ganglia just beside the vertebral column

B) They arise from thoracocervical region of spinal cord and form ganglia just beside the vertebral column

C) They arise from cranio-sacral region of spinal cord and from ganglia very close to effector organ

D) They arise from thoracolumbar region of spinal cord and form ganglia very close to effector organ

• question_answer160) Among the following characteristics, indicate the correct combination applicable to conditional reflex.

 I. Acquired by practice or learning II. Non acquired by birth III. Does not abolish by lack of practice IV. Participation of cerebral cortex V. Originates spontaneously

A) I, II and III

B) I, II and IV

C) I, and IV

D) II, III and V