# Solved papers for NEET AIPMT SOLVED PAPER SCREENING 2008

### done AIPMT SOLVED PAPER SCREENING 2008

• question_answer1) If the lattice parameter for a crystalline structure is $3.6\,\overset{\text{o}}{\mathop{\text{A}}}\,,$ then the atomic radius in fee crystal is

A) $1.81\,\overset{\text{o}}{\mathop{\text{A}}}\,$

B) $2.10\,\overset{\text{o}}{\mathop{\text{A}}}\,$

C) $2.92\,\overset{\text{o}}{\mathop{\text{A}}}\,$

D) $1.27\,\overset{\text{o}}{\mathop{\text{A}}}\,$

• question_answer2) If the error in the measurement of radius of a sphere is. 2%, then the error in the determination of volume of the sphere will be

A) 4%

B) 6%

C) 8%

D) 2%

• question_answer3) The electric potential at a point in free space due to a charge Q coulomb is $Q\times {{10}^{11}}V.$ The electric field at that point is

A) $4\pi {{\varepsilon }_{0}}Q\times {{10}^{22}}V/m$

B) $12\pi {{\varepsilon }_{0}}Q\times {{10}^{20}}V/m$

C) $4\pi {{\varepsilon }_{0}}Q\times {{10}^{20}}V/m$

D) $12\pi {{\varepsilon }_{0}}Q\times {{10}^{22}}V/m$

• question_answer4) The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be

A) 90

B) 10

C) 1.25

D) 100

• question_answer5) The energy required to charge a parallel plate condenser of plate separation a and plate area of cross-section A such that the uniform electric field between the plates is E, is

A) $\frac{1}{2}{{\varepsilon }_{0}}{{E}^{2}}/Ad$

B) ${{\varepsilon }_{0}}{{E}^{2}}/Ad$

C) ${{\varepsilon }_{0}}{{E}^{2}}Ad$

D) $\frac{1}{2}{{\varepsilon }_{0}}{{E}^{2}}Ad$

• question_answer6) A roller coaster is designed such that riders experience "weightlessness" as they go round the top of a hill whose radius of curvature is 20 m. The speed of the car at the top of the hill is between

A) 14 m/s and 15m/s

B) 15 m/s and 16 m/s

C) 16 m/s and 17 m/s

D) 13 m/s and 14 m/s

• question_answer7) The ratio of the radii of gyration of a circular disc to that of a circular ring, each of same mass and radius, around their respective axes is

A) $\sqrt{3}:\sqrt{2}$

B) $1:\sqrt{2}$

C) $\sqrt{2}:1$

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

• question_answer8) The work function of a surface of a photosensitive material is 6.2 eV. The wavelength, of the incident radiation for which the stopping potential is 5 V lies in the

A) ultraviolet region

B) visible region

C) infrared region

D) X-ray region

• question_answer9) The ground state energy of hydrogen atom is -13.6 eV. When its electron is in the first excited state, its excitation energy is

A) 3.4 eV

B) 6.8 eV

C) 10.2 eV

D) zero

• question_answer10) A current of 3 A flows through the $2\Omega$ resistor shown in the circuit. The power dissipated in the $5\Omega$ resistor is

A) 4 W

B) 2 W

C) 1 W

D) 5 W

• question_answer11) A p-n photodiode is made of a material with a band gap of 2.0 eV. The minimum frequency of the radiation that can be absorbed by the material is nearly

A) $10\times {{10}^{14}}Hz$

B) $5\times {{10}^{14}}Hz$

C) $1\times {{10}^{14}}Hz$

D) $20\times {{10}^{14}}Hz$

• question_answer12) Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional forces are 10% of energy. How much power is generated by the turbine? $(g=10\,m/{{s}^{2}})$

A) 8.1 kW

B) 10.2 kW

C) 12.3 kW

D) 7.0 kW

• question_answer13) On a new scale of temperature (which is linear) and called the W scale, the freezing and boiling points of water are ${{39}^{\text{o}}}W$ and ${{239}^{\text{o}}}W$ respectively. What will be the temperature on the new scale, corresponding to a temperature of ${{39}^{\text{o}}}C$ on the Celsius scale?

A) ${{78}^{\text{o}}}W$

B) ${{117}^{\text{o}}}W$

C) ${{200}^{\text{o}}}W$

D) ${{139}^{\text{o}}}W$

• question_answer14) If Q, E and W denote respectively the heat added, change in internal energy and the work done in a closed cycle process, then

A) W = 0

B) Q = W = 0

C) E = 0

D) Q = 0

• question_answer15) Two simple harmonic motions of angular frequency 100 and $1000\,\,rad\,\,{{s}^{-1}}$ have the same displacement amplitude. The ratio of their maximum acceleration is

A) 1 : 10

B) $1:{{10}^{2}}$

C) $1:{{10}^{3}}$

D) $1:{{10}^{4}}$

• question_answer16) A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS, SR and RQ. are ${{F}_{1}},{{F}_{2}}$ and ${{F}_{3}}$respectively and are in the plane of the paper and along the directions shown, the force on the segment QP is

A) ${{F}_{3}}-{{F}_{1}}-{{F}_{2}}$

B) $\sqrt{{{({{F}_{3}}-{{F}_{1}})}^{2}}+F_{2}^{2}}$

C) $\sqrt{{{({{F}_{3}}-{{F}_{1}})}^{2}}-F_{2}^{2}}$

D) ${{F}_{3}}-{{F}_{1}}+{{F}_{2}}$

• question_answer17) Two radioactive materials ${{X}_{1}}$ and ${{X}_{2}}$ have decay constants $5\lambda$ and $\lambda$ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of ${{X}_{1}}$ to that of ${{X}_{2}}$will be $\frac{1}{e}$ after a time

A) $\lambda$

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

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

D) $\frac{e}{\lambda }$

• question_answer18) Two thin lenses of focal lengths ${{f}_{1}}$ and ${{f}_{2}}$ are in contact and coaxial. The power of the combination is

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

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

C) $\frac{{{f}_{1}}+{{f}_{2}}}{{{f}_{1}}{{f}_{2}}}$

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

• question_answer19) The distance travelled by a particle starting from rest and moving with an acceleration $\frac{4}{3}m{{s}^{-2}},$in the third second is

A) 6 m

B) 4 m

C) $\frac{10}{3}m$

D) $\frac{19}{3}m$

• question_answer20) The circuit is equivalent to

A) AND gate

B) NAND gate

C) NOR gate

D) OR gate

• question_answer21) A particle mass m, charge Q and kinetic energy T enters a transverse uniform magnetic field of induction $\overrightarrow{B}.$ After 3 s the kinetic energy of the particle will be

A) 3T

B) 2T

C) T

D) AT

• question_answer22) A wire of a certain material is stretched slowly by ten per cent. Its new resistance and specific resistance become respectively

A) 1.2 times, 1.1 times

B) 1.21 times, same

C) both remain the same

D) 1.1 times, 1.1 times

• question_answer23) An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from temperature 20?C? The temperature of boiling water is 100?C

A) 6.3 min

B) 8.4 min

C) 12.6 min

D) 4.2 min

• question_answer24) In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result of

A) excitation of electrons in the atoms

B) collision between the atoms of the gas

C) collisions between the charged particles emitted from the cathode and the atoms of the gas

D) collision between different electrons of the atoms of the gas

• question_answer25) A particle of mass 1 mg has the same wavelength as an electron moving with a velocity of $3\times {{10}^{6}}\text{m}{{\text{s}}^{-1}}$The velocity of the Particle is

A) $2.7\times {{10}^{-18}}\text{m}{{\text{s}}^{-1}}$

B) $9\times {{10}^{-2}}\text{m}{{\text{s}}^{-1}}$

C) $3\times {{10}^{-31}}\text{m}{{\text{s}}^{-1}}$

D) $2.7\times {{10}^{-21}}\text{m}{{\text{s}}^{-1}}$ (Mass of electron$=\text{ }9.1\times {{10}^{-}}^{31}kg$)

• question_answer26) A particle shows distance-time curve as given in this figure. The maximum instantaneous velocity of the particle is around the point

A) B

B) C

C) D

D) A

• question_answer27) A cell can be balanced against 110 cm and 100 cm of potentiometer wire, respectively with and without being short circuited through a resistance of $10\Omega .$Its internal resistance is

A) $1.0\,\Omega$

B) $0.5\,\Omega$

C) $2.0\,\Omega$

D) zero

• question_answer28) If M (A, Z), ${{M}_{p}}$ and M,, denote the masses of the nucleus $_{Z}^{A}X,$proton and neutron respectively in units of $u(1u=931.5MeV/{{c}^{2}})$ and BE represents its binding energy in MeV, then

A) $M(A,Z)=Z{{M}_{p}}+(A-Z){{M}_{n}}-BE/{{c}^{2}}$

B) $M(A,Z)=Z{{M}_{p}}+(A-Z){{M}_{n}}+BE$

C) $M(A,Z)=Z{{M}_{p}}+(A-Z){{M}_{n}}-BE$

D) $M(A,Z)=Z{{M}_{p}}+(A-Z){{M}_{n}}-BE/{{c}^{2}}$

• question_answer29) Three forces acting on a body are shown in the figure To have the resultant force only along the y-direction, the magnitude of the minimum additional force needed is

A) 0.5 N

B) 1.5 N

C) $\frac{\sqrt{3}}{4}N$

D) $\sqrt{3}\,N$

• question_answer30) Two periodic waves of intensities ${{I}_{1}}$ and ${{I}_{2}}$ pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities is

A) ${{I}_{1}}+{{I}_{2}}$

B) ${{(\sqrt{{{I}_{1}}}+\sqrt{{{I}_{2}}})}^{2}}$

C) ${{(\sqrt{{{I}_{1}}}-\sqrt{{{I}_{2}}})}^{2}}$

D) $2(\sqrt{{{I}_{1}}}+\sqrt{{{I}_{2}}})$

• question_answer31) A shell of mass 200 g is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The initial velocity of the shell is

A) 100 $m{{s}^{-1}}$

B) $80\,m{{s}^{-1}}$

C) $40\,m{{s}^{-1}}$

D) $120\,m{{s}^{-1}}$

• question_answer32) A thin conducting ring of radius R is given a charge +Q. The electric field at the centre O of the ring due to the charge on the part AKB of the ring is E. The electric field at the centre due to the charge on the part ACDB of the ring is

A) 3E along KO

B) E along OK

C) E along KO

D) 3 E along OK

• question_answer33) The velocity of electromagnetic radiation in a medium of permittivity ${{\varepsilon }_{0}}$ and permeability ${{\mu }_{0}}$ is given by

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

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

C) $\frac{1}{\sqrt{{{\mu }_{0}}{{\varepsilon }_{0}}}}$

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

• question_answer34) A point performs simple harmonic oscillation of period T and the equation of motion is given by $x=c\sin (\omega t+\pi /6).$ After the elapse of what fraction of the time period the velocity of the point will be equal to half of its maximum velocity?

A) $\frac{T}{8}$

B) $\frac{T}{6}$

C) $\frac{T}{3}$

D) $\frac{T}{12}$

• question_answer35) A long solenoid has 500 rums. When a current of 2 A is passed through it, the resulting magnetic flux linked with each turn of the solenoid is $4\times {{10}^{-3}}$Wb. The self-inductance of the solenoid is

A) 2.5 H

B) 2.0 H

C) 1.0 H

D) 4.0 H

• question_answer36) A boy is trying to start a fire by focusing sunlight on a piece of paper using an equiconvex lens of focal length 10 cm. The diameter of the sun is $1.39\times {{10}^{9}}m$and its mean distance from the earth is $1.5\times {{10}^{11}}m$. What is the diameter of the sun's image on the paper?

A) $9.2\times {{10}^{-4}}m$

B) $6.5\times {{10}^{-4}}m$

C) $6.5\times {{10}^{-5}}m$

D) $12.4\times {{10}^{-4}}m$

• question_answer37) In an AC circuit the emf (e) and the current (i) at any instant are given respectively by $e={{E}_{0}}\sin \omega t$ $i={{I}_{0}}\sin (\omega t-\phi )$ The average power in the circuit over one cycle of AC is

A) $\frac{{{E}_{0}}{{I}_{0}}}{2}$

B) $\frac{{{E}_{0}}{{I}_{0}}}{2}\sin \phi$

C) $\frac{{{E}_{0}}{{I}_{0}}}{2}\cos \phi$

D) ${{E}_{0}}{{I}_{0}}$

• question_answer38) In the circuit shown, the current through the $4\Omega$resistor is 1 A when the points P and M are connected to a DC voltage source. The potential difference between the points M and N is

A) 1.5V

B) 1.0 V

C) 0.5 V

D) 3.2 V

• question_answer39) A particle moves in a straight line with a constant acceleration. It changes its velocity from 10 $\text{m}{{\text{s}}^{\text{-1}}}$ to 20 $\text{m}{{\text{s}}^{\text{-1}}}$ while passing through a distance 135 m in t- second. The value of t is

A) 10

B) 1.8

C) 12

D) 9

• question_answer40) A thin rod of length L and mass M is bent at its midpoint into two halves so that the angle between them is 90?. The moment of inertia of the bent rod about an axis passing through the bending point and perpendicular to the plane defined by the two halves of the rod is

A) $\frac{M{{L}^{2}}}{24}$

B) $\frac{M{{L}^{2}}}{12}$

C) $\frac{M{{L}^{2}}}{6}$

D) $\frac{\sqrt{2}M{{L}^{2}}}{24}$

• question_answer41) A circular disc of radius 0.2 m is placed in a uniform magnetic field of induction $\frac{1}{\pi }\left( \frac{Wb}{{{m}^{2}}} \right)$ in such a way that its axis makes an angle of 60? with $\overrightarrow{B}.$The magnetic flux linked with the disc is

A) 0.02 Wb

B) 0.06 Wb

C) 0.08 Wb

D) 0.01 Wb

• question_answer42) A particle of mass m is projected with velocity v making an angle of 45? with the horizontal. When the particle lands on the level ground the magnitude of the change in its momentum will be

A) 2mv

B) $mv/\sqrt{2}$

C) $mv\sqrt{2}$

D) zero

• question_answer43) Two points are located at a distance of 10 m and 15 m from the source of oscillation. The period of oscillation is 0.05 s and the velocity of the wave is 300 m/s. What is the phase difference between the oscillations of two points?

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

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

C) $\pi$

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

• question_answer44) Two nuclei have their mass numbers in the ratio of 1 : 3. The ratio of their, nuclear densities would be

A) 1 : 3

B) 3 : 1

C) ${{(3)}^{1/3}}:1$

D) 1 : 1

• question_answer45) Sand is being dropped on a conveyor belt at the rate of M kg/s. The force necessary to keep the belt moving with a constant velocity of v m/s will be

A) Mv newton

B) 2Mv newton

C) $\frac{Mv}{2}$newton

D) zero

• question_answer46) The wave described by $y=0.25\sin (10\pi x-2\pi t),$where x and y are in metre and t in second, is a wave travelling along the

A) - ve x direction with frequency 1 Hz

B) + ve x direction with frequency $\pi$ Hz and wavelength $\lambda =0.2m$

C) + ve x direction with frequency 1 Hz and wavelength $\lambda =0.2m$

D) -ve x direction with amplitude 0.25 m and wavelength $\lambda =0.2m$

• question_answer47) Curie temperatures is the temperature above which

A) ferromagnetic material becomes paramagnetic material

B) paramagnetic material becomes diamagnetic material

C) paramagnetic material becomes ferromagnetic material

D) ferromagnetic material becomes diamagnetic material

• question_answer48) At 10?C the value of the density of a fixed mass of an ideal gas divided by its pressure is x. At 110?C this ratio is

A) x

B) $\frac{383}{283}x$

C) $\frac{10}{110}x$

D) $\frac{283}{383}x$

• question_answer49) Which two of the following five physical parameters have the same dimensions? (A) energy density (B) refractive index (C) dielectric constant (D) Young's modulus (E) magnetic field

A) 2 and 4

B) 3 and 5

C) 1 and 4

D) 1 and 5

• question_answer50) A galvanometer of resistance $50\,\,\Omega$ is connected to a battery of 3 V along with a resistance of $2950\,\,\Omega$ in series. A full scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions, the resistance in series should be

A) $5050\,\,\Omega$

B) $5550\,\,\Omega$

C) $6050\,\,\Omega$

D) $4450\,\,\Omega$

• question_answer51) Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the ${{H}^{+}}$ ion concentration in the mixture?

A) $1.11\times {{10}^{-4}}M$

B) $3.7\times {{10}^{-4}}M$

C) $3.7\times {{10}^{-3}}M$

D) $1.11\times {{10}^{-3}}M$

• question_answer52) Acetophenone when reacted with a base, ${{C}_{2}}{{H}_{5}}ONa,$ yields a stable compound which has the structure

A)

B)

C)

D)

• question_answer53) The angular shape of ozone molecule $({{O}_{3}})$consists of

A) 1 sigma and 2 pi bonds

B) 2 sigma and 2 pi bonds

C) 1 sigma and 1 pi bonds

D) 2 sigma and 1 pi bonds

• question_answer54) On the basis of the following ${{E}^{\text{o}}}$ values, the strongest oxidising agent is ${{[Fe{{(CN)}_{6}}]}^{4-}}\to {{[Fe{{(CN)}_{6}}]}^{3-}}]+{{e}^{-}};$ ${{E}^{o}}=-0.35V$ $F{{e}^{2+}}\to F{{e}^{3+}}+{{e}^{-}};{{E}^{o}}=-0.77V$

A) ${{[Fe{{(CN)}_{6}}]}^{4-}}$

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

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

D) ${{[Fe{{(CN)}_{6}}]}^{3-}}$

• question_answer55) Green chemistry means such reactions which

A) produce colour during reactions

B) reduce the use and production of hazardous chemicals

C) are related to the! depletion of ozone layer

D) study the reactions in plants

• question_answer56) Which of the following are not state functions? (I) q + W (II) q (III) W (IV) H-TS

A) (I) and (IV)

B) (II), (III) and (IV)

C) (I), (II) and (III)

D) (II) and (III)

• question_answer57) If uncertainty in position and momentum are equal, then uncertainty in velocity is

A) $\frac{1}{2m}\sqrt{\frac{h}{\pi }}$

B) $\sqrt{\frac{h}{2\pi }}$

C) $\frac{1}{m}\sqrt{\frac{h}{\pi }}$

D) $\sqrt{\frac{h}{\pi }}$

• question_answer58) The correct order of decreasing second ionisation enthalpy of Ti (22), V (23), Cr (24) and Mn(25) is

A) $Cr>Mn>V>Ti$

B) $V>Mn>Cr>Ti$

C) $Mn>Cr>Ti>V$

D) $Ti>V>Cr>Mn$

• question_answer59) The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of

A) Acyl chloride > Acid anhydride > Ester > Amide

B) Ester > Acyl chloride > Amide >Acid anhydride

C) Acid anhydride > Amide, > Ester > Acyl chloride

D) Acyl chloride > Ester > Acid anhydride > Amide

• question_answer60) Kohlrausch's law states that at

A) finite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte, whatever be the nature of the other ion of the electrolyte

B) in finite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte depending on the nature of the other ion of the electrolyte.

C) infinite dilution, each ion makes definite contribution to conductance of an electrolyte whatever be the nature of the other ion of the electrolyte.

D) infinite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte, whatever be the nature of the other ion of the electrolyte.

• question_answer61) Which one of the following is most reactive towards electrophilic attack?

A)

B)

C)

D)

• question_answer62) Volume occupied by one molecule of water (density $=1\,g\,c{{m}^{-3}}$) is

A) $9.0\times {{10}^{-}}^{23}c{{m}^{3}}$

B) $6.023\times {{10}^{-}}^{23}c{{m}^{3}}$

C) $3.0\times {{10}^{-}}^{23}c{{m}^{3}}$

D) $5.5\times {{10}^{-}}^{23}c{{m}^{3}}$

• question_answer63) Which of the following complexes exhibits the highest paramagnetic behaviour? where gly = glycine, en = ethylenediamine and bpy = bipyridyl moities (At no : Ti = 22, V = 23, Fe = 26, Co = 27)

A) ${{[V{{(gly)}_{2}}{{(OH)}_{2}}{{(N{{H}_{3}})}_{2}}]}^{+}}$

B) ${{[Fe(en)(bpy){{(N{{H}_{3}})}_{2}}]}^{2+}}$

C) ${{[Co{{(OX)}_{2}}{{(OH)}_{2}}]}^{-}}$

D) ${{[Ti{{(N{{H}_{3}})}_{6}}]}^{3+}}$

• question_answer64) 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 the same

D) number of the molecules of gas increases

• question_answer65) For the gas phase reaction, $PC{{l}_{5}}_{(g)}PC{{l}_{3}}(g)+C{{l}_{2}}(g)$which of the following conditions are correct?

A) $\Delta H=0$and$\Delta S<0$

B) $\Delta H>0$and $\Delta S<0$

C) $\Delta H>0$and$\Delta S<0$

D) $\Delta H>0$and$\Delta S<0$

• question_answer66) In a ${{S}_{N}}2$ substitution reaction of the type $R-Br+C{{l}^{-}}\xrightarrow[{}]{DNF}R-Cl+B{{r}^{-}},$which one of the following has the highest relative rate?

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

B) $C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}Br$

C) $C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{2}}Br$

D) $C{{H}_{3}}C{{H}_{2}}Br$

• question_answer67) Number of moles of $MnO_{4}^{-}$ required to oxidize one mole of ferrous oxalate completely in acidic medium will be

A) 0. 6 mole

B) 0.4 mole

C) 7.5 moles

D) 0.2 mole

• question_answer68) If the concentration of $O{{H}^{-}}$ions in the reaction $Fe{{(OH)}_{3}}(s)F{{e}^{3+}}(aq)+3O{{H}^{-}}(aq)$ is decreased by $\frac{1}{4}$ times, then equilibrium concentration of $F{{e}^{3+}}$ will increase by

A) 8 times

B) 16 times

C) 64 times

D) 4 times

• question_answer69) The sequence of ionic mobility in aqueous solution is

A) ${{K}^{+}}>N{{a}^{+}}>R{{b}^{+}}>C{{s}^{+}}$

B) $C{{s}^{+}}>R{{b}^{+}}>{{K}^{+}}>N{{a}^{+}}$

C) $R{{b}^{+}}>{{K}^{+}}>C{{s}^{+}}>N{{a}^{+}}$

D) $N{{a}^{+}}>{{K}^{+}}>R{{b}^{+}}>C{{s}^{+}}$

• question_answer70) The alkali metals form salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders?

A) CsH > RbH > KH > NaH > UH

B) KH > NaH > LiH > CsH > RbH

C) NaH > LiH > KH > RbH > CsH

D) LiH > NaH > KH > RbH > CsH

• question_answer71) Which one of the following arrangements does not give the correct picture of the trends indicated against it?

A) ${{F}_{2}}>C{{l}_{2}}>B{{r}_{2}}>{{I}_{2}}:$ Oxidizing power

B) ${{F}_{2}}>C{{l}_{2}}>B{{r}_{2}}>{{I}_{2}}:$ Electron gain enthalpy

C) ${{F}_{2}}>C{{l}_{2}}>B{{r}_{2}}>{{I}_{2}}:$ Bond dissociation energy

D) ${{F}_{2}}>C{{l}_{2}}>B{{r}_{2}}>{{I}_{2}}$: Electronegativity

• question_answer72) Standard free energies of formation (in kJ/mol) at 298 K are -237.2, -394.4. and -8.2 for${{H}_{2}}O(l)C{{O}_{2}}(g)$ ate) and pentane (g), respectively. The value of $E_{cell}^{o}$pentane-oxygen fuel cell is

A) 1.968 V

B) 2.0968 V

C) 1.0968 V

D) 0.0968 V

• question_answer73) ${{H}_{3}}C-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-CH=C{{H}_{2}}+HBr\to A$ A (Predominantly) is

A) $C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}-C{{H}_{2}}Br$

B) $C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix} Br \\ | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{2}}C{{H}_{3}}$

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

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

• question_answer74) Base strength of (A)${{H}_{3}}C\overset{\Theta }{\mathop{C}}\,{{H}_{2}}$ (B)${{H}_{2}}C=\overset{\Theta }{\mathop{C}}\,H$and (C) $H-C\equiv \overset{\Theta }{\mathop{C}}\,$is in the order of

A) (2) > (1) > (3)

B) (3) > (2) > (1)

C) (1) > (3) > (2)

D) (1) > (2) > (3)

• question_answer75) Which of the following statements is not correct?

A) The fraction of the total volume occupied by the atoms in a primitive cell is 0.48

B) Molecular solids are generally volatile

C) The number of carbon atoms in an unit cell of diamond is 4

D) The number of Bravais lattices in which a crystal can be categorized is 14

• question_answer76) If ?a? stands for the edge length of the cubic systems : simple cubic, body centred cubic and face centred cubic, then the ratio of radii of the spheres in these systems will be respectively,

A) $\frac{1}{2}a;\frac{\sqrt{3}}{4}a:\frac{1}{2\sqrt{2}}a$

B) $\frac{1}{2}a;\sqrt{3}a:\frac{1}{\sqrt{2}}a$

C) $\frac{1}{2}a:\frac{\sqrt{3}}{2}a:\frac{\sqrt{2}}{2}a$

D) $1a:\sqrt{3}a:\sqrt{2}a$

• question_answer77) The rate constants ${{k}_{1}}$ and ${{k}_{2}}$ for two different reactions are ${{10}^{16}}.{{e}^{-2000/T}}$ and ${{10}^{15}}.{{e}^{-1000/T}},$ respectively. The temperature at which ${{k}_{1}}={{k}_{2}}$is

A) 1000 K

B) $\frac{2000}{2.303}K$

C) 2000 K

D) $\frac{1000}{2.303}K$

• question_answer78) What volume of oxygen gas $({{O}_{2}})$ measured at 0?C and 1 atm, is needed to bum completely 1 L of propane gas $({{C}_{3}}{{H}_{8}})$ measured under the same conditions?

A) 7 L

B) 6 L

C) 5 L

D) 10 L

• question_answer79) The correct order of increasing bond angles in the following triatomic species is

A) $NO_{2}^{-}<NO_{2}^{+}<N{{O}_{2}}$

B) $NO_{2}^{-}<N{{O}_{2}}<NO_{2}^{+}$

C) $NO_{2}^{+}<N{{O}_{2}}<NO_{2}^{-}$

D) $NO_{2}^{+}<NO_{2}^{-}<N{{O}_{2}}$

• question_answer80) How many stereoisomers does this molecule have?$C{{H}_{3}}CH=CHC{{H}_{2}}\overset{*}{\mathop{C}}\,HBrC{{H}_{3}}$

A) 4

B) 6

C) 8

D) 2

• question_answer81) Equimolar solutions of the following were prepared in water separately. Which one of the solutions will record the highest pH?

A) $SrC{{l}_{2}}$

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

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

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

• question_answer82) Four diatomic species are listed below in different sequences. Which of these presents the correct order of their increasing bond order?

A) $O_{2}^{-}<NO<C_{2}^{2-}<He_{2}^{+}$

B) $NO<C_{2}^{2-}<O_{2}^{-}He_{2}^{+}$

C) $C_{2}^{2-}<He_{2}^{+}<NO<O_{2}^{-}$

D) $He_{2}^{+}<O_{2}^{-}<NO<C_{2}^{2-}$

• question_answer83) Percentage of free space in a body centred cubic unit cell is

A) 30%

B) 32%

C) 34%

D) 28%

• question_answer84) With which one of the following elements silicon should be doped so as to give p-type of semiconductor?

A) Germanium

B) Arsenic

C) Selenium

D) Boron

• question_answer85) An organic compound contains carbon hydrogen and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67%. The empirical formula of the compound would be

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

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

C) $CHO$

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

• question_answer86) The measurement of the electron position is associated with an uncertainty in momentum, which is equal to $1\times {{10}^{-18}}g\,cm\,{{s}^{-1}}.$The uncertainty in electron velocity is, (mass of an electron is $9\times {{10}^{-28}}g$)

A) $1\times {{10}^{9}}cm\,{{s}^{-1}}$

B) $1\times {{10}^{6}}cm\,{{s}^{-1}}$

C) $1\times {{10}^{5}}cm\,{{s}^{-1}}$

D) $1\times {{10}^{11}}cm\,{{s}^{-1}}$

• question_answer87) How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2g of HCl?

A) 0.044

B) 0.333

C) 0.011

D) 0.029

• question_answer88) In a reaction of aniline a coloured product C was obtained. The structure of C would be

A)

B)

C)

D)

• question_answer89) A strong; base can abstract an $\text{-}$hydrogen from

A) alkene

B) amine

C) ketone

D) alkane

• question_answer90) The stability of carbanions in the following (A)$RC\equiv \overset{\Theta }{\mathop{C}}\,$ (B) (C)${{R}_{2}}C\equiv \overset{\Theta }{\mathop{C}}\,H$ (D)${{R}_{3}}C-\overset{\Theta }{\mathop{C}}\,{{H}_{2}}$ is in the order of

A) (1) > (2) > (3) > (4)

B) (2) > (3) > (4) > (1)

C) (4) > (2) > (3) > (1)

D) (1) > (3) > (2) > (4)

• question_answer91) Bond dissociation enthalpy of ${{H}_{2}},C{{l}_{2}}$ and $HCl$ are 434, 242 and $431\,\,kJ\,mo{{l}^{-1}}$ respectively. Enthalpy of formation of HCl is

A) $93\,kJ\,mo{{l}^{-1}}$

B) $-245\,kJ\,mo{{l}^{-1}}$

C) $-93\,kJ\,mo{{l}^{-1}}$

D) $245\,kJ\,mo{{l}^{-1}}$

• question_answer92) The dissociation equilibrium of a gas $A{{B}_{2}}$ can be represented as $2A{{B}_{2}}(g)2AB(g)+{{B}_{2}}(g)$ The degree of dissociation is 'x' and is small compared to 1. The expression relating the degree of dissociation (x) with equilibrium constant ${{K}_{p}}$ and total pressure p is

A) $(2{{K}_{p}}/p)$

B) ${{(2{{K}_{p}}/p)}^{1/3}}$

C) ${{(2{{K}_{p}}/p)}^{1/2}}$

D) $({{K}_{p}}/p)$

• question_answer93) Which one of the following is an amine hormone?

A) Thyroxine

B) Oxypurin

C) Insulin

D) Progesterone

• question_answer94) Which one of the following statements is not true?

A) In vulcanisation, the formation of sulphur bridges between different chains make rubber harder and stronger

B) Natural rubber has the traras-configuration at every double bond

C) Buna-S is a copolymer of butadiene and styrene

D) Natural rubber is a 1, 4-polymer of isoprene

• question_answer95) In the hydrocarbon $\underset{6}{\mathop{C{{H}_{3}}}}\,-\underset{5}{\mathop{CH}}\,=\underset{4}{\mathop{CH}}\,-\underset{3}{\mathop{C{{H}_{2}}}}\,-\underset{2}{\mathop{C}}\,\equiv \underset{1}{\mathop{CH}}\,$ The state of hybridisation of carbons 1, 3 and 5 are in the following sequence

A) $~s{{p}^{2}},sp,\text{ }s{{p}^{3}}$

B) $sp,\text{ }s{{p}^{3}},\text{ }s{{p}^{2}}$

C) $sp,\text{ }s{{p}^{2}},\text{ }s{{p}^{3}}$

D) $s{{p}^{3}},s{{p}^{2}},\text{ }sp$

• question_answer96) The values of ${{K}_{{{p}_{1}}}}$ and ${{K}_{{{p}_{2}}}}$for the reactions $XY+Z$ ...(i) and $A2B$ ..(ii) are in ratio of 9 : 1. If degree of dissociation of X and A be equal, then total pressure at equilibrium (i) and (ii) are in the ratio

A) 3 : 1

B) 1 : 9

C) 36 : 1

D) 1 : 1

• question_answer97) In DNA, the complimentary bases are

A) Adenine and thymine; guanine and cytosine

B) Adenine and thymine; guanine and uracil

C) Adenine and guanine, thymine and cytosine

D) Uracil and adenine; cytosine and guanine

• question_answer98) The bromination of acetone that occurs in acid solution is represented by this equation. $C{{H}_{3}}COC{{H}_{3}}(aq)+B{{r}_{2}}(aq)\xrightarrow[{}]{{}}$ $C{{H}_{3}}COC{{H}_{2}}Br(aq)+{{H}^{+}}(aq)+B{{r}^{-}}(aq)$ These kinetic data were obtained for given reaction concentrations. Initial concentrations, M $[C{{H}_{3}}COC{{H}_{3}}]$ $[B{{r}_{2}}]$ $[{{H}^{+}}]$ 0.30 0.05 0.05 0.30 0.10 0.05 0.30 0.10 0.10 0.40 0.05 0.20 Initial rate, disappearance of $B{{r}_{2}},M{{s}^{-1}}$ $5.7\times {{10}^{-5}}$ $5.7\times {{10}^{-5}}$ $1.2\times {{10}^{-4}}$ $3.1\times {{10}^{-4}}$ Based on these data, the rate equation is

A) Rate $=k[C{{H}_{3}}COC{{H}_{3}}][{{H}^{+}}]$

B) Rate$=k[CH=COC{{H}_{3}}][B{{r}_{2}}]$

C) Rate $=k[C{{H}_{3}}COC{{H}_{3}}][B{{r}_{2}}]{{[{{H}^{+}}]}^{2}}$

D) Rate $=k[C{{H}_{3}}COC{{H}_{3}}][B{{r}_{2}}]{{[{{H}^{+}}]}^{2}}$

• question_answer99) The value of equilibrium constant of the reaction $HI(g)\frac{1}{2}{{H}_{2}}(g)+\frac{1}{2}{{I}_{2}}$is 8.0 The equilibrium constant of the reaction ${{H}_{2}}(g)+{{I}_{2}}(g)2HI(g)$will be

A) $\frac{1}{16}$

B) $\frac{1}{64}$

C) 16

D) $\frac{1}{8}$

• question_answer100) In which of the following coordination entities the magnitude of ${{\Delta }_{o}}$(CCFSE in octahedral field) will be maximum? (Atomic number Co = 27)

A) ${{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}}$

B) ${{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}$

C) ${{[Co{{(CN)}_{6}}]}^{3-}}$

D) ${{[Co{{({{C}_{2}}{{O}_{4}})}_{3}}]}^{3-}}$

• question_answer101) Keeping in view the 'fluid mosaic model' for the structure of cell membrane, which one 'of the following statements is correct with respect to the movement of lipids and proteins from one lipid monolayer to the other (described as flip-flop movement)?

A) Both lipids and proteins can flip-flop

B) While lipids can rarely flip-flop, proteins cannot

C) While proteins can flip-flop, lipids cannot

D) Neither lipids, nor proteins can flip-flop

• question_answer102) Which one of the following pairs of plant structures has haploid number of chromosomes?

A) Megaspore mother cell and antipodal cells

B) Egg cell and antipodal cells

C) Nucellus and antipodal cells

D) Egg nucleus and secondary nucleus

• question_answer103) The ${{C}_{4}}$-plants are photosynthetically more efficient than ${{C}_{3}}$-plants because

A) the $C{{O}_{2}}$compensation point is more

B) $C{{O}_{2}}$ generated during photorespiration is trapped and recycled through- PEP carboxylase

C) the $C{{O}_{2}}$efflux is not prevented

D) they have more chloroplasts

A) is secreted by anterior pituitary

B) stimulates growth of mammary glands

C) stimulates pituitary to secrete vasopressin

D) causes strong uterine contractions during parturition

• question_answer105) Gel electrophoresis is used for

A) cutting of DNA into fragments

B) separation of DNA fragments according to their size

C) construction of recombinant DNA by joining with cloning vectors

D) isolation of DNA molecule

• question_answer106) Polysome is formed by

A) several ribosomes attached to a single mRNA

B)

C) a ribosome with several subunits

D) ribosomes attached to each other in a linear arrangement

• question_answer107) Given below are four methods (A-D) and their modes of action (1-4) in achieving contraception. Select their correct matching from the four options that follow

 Method Mode of action A. The pill 1. Prevents sperms reaching B. Condom 2. Prevents implantation C. Vasectomy 3. Prevents ovulation D. Copper-T 4. Semen contains no sperms

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

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

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

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

• question_answer108) What is vital capacity of our lungs?

A) Inspiratory reserve volume plus tidal volume

B) Total lung capacity minus expiratory reserve volume

C) Inspiratory reserve volume plus expiratory reserve volume

D) Total lung capacity minus residual volume

• question_answer109) In which one of the following, the male and female gametophytes don't have free-living independent existence?

A) Pteris

B) Funaria

C) Polytrichum

D) Cedrus

• question_answer110) A transgenic food crop, which may help in solving the problem of nightblindness in developing countries is

A) Flovr savr tomatoes

C) Btsoybean

D) Golden rice

• question_answer111) A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this (A) Lots of urea and phosphate fertilizer were used in the crops in the vicinity. (B) The area was sprayed with DDT by an aircraft. (C) The lake water turned green and stinky. (D) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis. Which two of above were the main causes of fish mortality in the lake?

A) 2, 3

B) 3, 4

C) 1, 3

D) 1, 2

• question_answer112) Given below is a diagrammatic cross section of a single loop of human cochlea. Which one of the following options correctly represents the names of three different parts?

A) B Tectorial membrane C Perilymph D Secretory cells

B) C Endolymph D Sensory hair cells A Serum

C) D Sensory hair cells A Endolymph B Tectorial membrane

D) A Perilymph B Tectorial membrane C Endolymph

• question_answer113) Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in

A) vessels and tracheid differentiation

B) leaf abscission

C) annual plants

D) floral parts

• question_answer114) Vascular tissues in flowering plants develop from

A) phellogen

B) plerome

C) periblem

D) dermatogen

• question_answer115) Nitrogen-fixation in root nodules of Alnus is brought about by

B) Clostridium

C) Frankia

D) Azorhizobium

• question_answer116) What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?

A) Gastric juice will be deficient in chymosin

B) Gastric juice will be deficient in pepsinogen

C) In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin

D) Enterokinase will not be released from the duodenal mucosa and so trypsinogen is no converted to trypsin

• question_answer117) Electrons from excited chlorophyll molecule photosystem-II are accepted first by

A) cytochrome-b

B) cytochrome-f

C) quinone

D) ferredoxin

• question_answer118) Trichoderma harzianum has proved a useful micro-organism for

A) bioremediation of contaminated soils

B) reclamation of wastelands

C) gene transfer in higher plants

D) biological control of soil-borne plan pathogens

• question_answer119) Which type of white blood cells are concern with the release of histamine and the nautili anticoagulant heparin?

A) Neutrophils

B) Basophils

C) Eosinophils

D) Monqcytes

• question_answer120) Which one of the following in birds, indica their reptilian ancestry?

A) Scales on their hind limbs

B) Pour chambered heart

C) Two special chambers crop and gizzard in their digestive tract

D) Eggs with a calcareous shell

• question_answer121) Endosperm is consumed by developing embryo in the seed of

A) coconut

B) castor

C) pea

D) maize

• question_answer122) In humans, at the end of the first meiotic division, the male germ cells differentiate into the

A) primary spermatocytes

B) secondary spermatocytes

C) spermatids

D) spermatogonia

• question_answer123) In the DNA molecule

A) the total amount of purine nucleotides and pyrimidine nucleotides is not always equal

B) there are two strands, which run parallel in the $5'\to 3'$ direction

C) the proportion of adenine in relation to thymine varies with the organism

D) there are two strands, which run anti parallel-one in $5'\to 3'$ direction and other in $5'\to 3'$

• question_answer124) Consider the following four measures (A-D) that could be taken to successfully grow chick pea in an area where bacterial blight disease is common

A) (A) spray with Bordeaux mixture (B) control of the insect vector of the disease pathogen (C) use of only disease-free seeds (D) use of varieties resistant to the disease Which two of the above measures can control the disease? B and C

B) A and B

C) C and D

D) A and D

• question_answer125) The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of

A) lignified thick walls

C) weak gravitational pull

D) transpiration pull

• question_answer126) The blood calcium level is lowered by the deficiency of

A) parathormone

B) thyroxine

C) calcitonin

D) Both (a) and (c)

A) grasslands

B) agro-ecosystems

C) oceans

D) forests

• question_answer128) Which one of the following is heterosporous?

A) Dryopteris

B) Salvinia

D) Equisetum

• question_answer129) Dry indehiscent single-seeded fruit formed from bicarpellary syncarpous inferior ovary is

A) caryopsis

B) cypsela

C) berry

D) cremocarp

• question_answer130) Which extra embryonic membrane in humans prevents desiccation of the embryo inside the uterus?

A) Chorion

B) Allantois

C) Yolk sac

D) Amnion

• question_answer131) The fleshy receptacle of syconous of fig encloses a number of

A) achenes

B) samaras

C) berries

D) mericarps

• question_answer132) Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?

A) Bacterial leaf blight of rice

B) Downy mildew of grapes

C) Loose smut of wheat

D) Black rust of wheat

• question_answer133) Unisexuality of flowers prevents

A) autogamy, but not geitonogamy

B) Both geitonogamy andxenogamy

C) geitonogamy, but not xenogamy

D) autogamy and geitonogamy

• question_answer134) The length of different inte modes in a culm of sugarcane is variable because of

A) shoot apical meristem

B) poition of axillary buds

C) size of leaf lamina at the node below each Internode

D) intercalary meristem

• question_answer135) Which one of the following is the correct difference between rod cells and cone cells of our retina?

A) Features Visual acuity Rod Cells High Cone Cells Low

B) Features Visual pigment Rod Cells Iodopsin Cone Cells Rhodopsin contained

C) Features Overall function Rod Cells Vision poor light Cone Cells Colour vision and detailed vision in bright light

D) Features Distribution Rod Cells More concentrated in Cone Cells Evenly distributed all over centre of retian retina

• question_answer136) In leaves of ${{\text{C}}_{\text{4}}}\text{-}$plants malic acid synthesis during $\text{C}{{\text{O}}_{\text{2}}}\text{-}$fixation occurs in

A) epidermal cells

B) mesophyll cells

C) bundle sheath

D) guard cells

• question_answer137) Which one of the following pairs of codons is correctly matcher with their function or the signal for the particular amino acid?

A) GUU, GCU ? Alanine

B) UAG, UGA?Stop

C) AUG, ACG ? Start/methionine

D) UUA, UCA?Leucine

• question_answer138) Cellulose is the major component of cell walls of

A) Pythium

B) Xanthomonas

C) Pseudomonas

D) Saccharomyces

• question_answer139) The slow rate of decomposition of fallen logs in nature is due to their

A) low moisture content

B) poor nitrogen content

C) anaerobic environment around them

D) low cellulose content

• question_answer140) Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch (A-E) make it useful as a storage material? (A) Easily translocated (B) Chemically non-reactive (C) Easily digested by animals (D) Osmotic ally inactive (E) Synthesized during photosynthesis The useful properties are

A) (B) and (C)

B) (B) and (D)

C) (A), (C) and (E)

D) (A) and (E)

• question_answer141) Which one of the following pairs of organs includes only the endocrine glands?

B) Pancreas and parathyroid

C) Thymus and testes

• question_answer142) Match the disease in Column-I with the appropriate items (pathogen/ prevention/treatment) in Column-II

 Column-I Column-II A. Amoebiasis 1. Treponema pallidum B. Diphtheria 2. Use only sterilized food and water C. Cholera 3. DPT vaccine D. Syphilis 4. Use oral rehydration therapy

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

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

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

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

• question_answer143) Replum is present in the ovary of flower of

A) lemon

B) mustard

C) sunflower

D) pea

• question_answer144) Which one of the following is the correct matching of the site of action on the given substrate, the enzyme acting upon it and the end product?

A) Duodenum:$\text{Triglycerides}\xrightarrow[{}]{\text{Trypsin}}$ Monogylcerides

B) Small intestine: Starch $\alpha \xrightarrow[{}]{\text{Amylase}}$Disaccharide (maltose)

C) Small intestine: Proteins $\xrightarrow[{}]{Pep\sin }$ Ammo acids

D) Stomach: Fats$\xrightarrow[{}]{Lipase}$ Micelles

• question_answer145) Modem detergents contain enzyme preparations of

A) acidophiles

B) alkaliphiles

C) thermoacidophiles

D) thermophiles

• question_answer146) The haemoglobin of a human foetus

A) has a lower affinity for oxygen than that of the adult

B) its affinity for oxygen is the same as that of an adult

C) has only 2 protein subunits instead of 4

D) has a higher affinity for oxygen than that of an adult

• question_answer147) Which one of the following scientist's name is correctly matched with the theory put forth by him?

A) Weismann ? Theory of continuity of germplasm

B) Pasteur ? Inheritance of acquired characters

C) de Vries ? Natural selection

D) Mendel ? Theory of pangenesis

• question_answer148) The most active phagocytic white blood cells are

A) neutrophils and eosinophils

B) lymphocytes and macrophages

C) eosinophils and lymphocytes

D) neutrophils and monocytes

• question_answer149) According to Central Pollution Control Board (CPCB), which paniculate size in diameter (in micrometres) of the air pollutants is responsible for greatest harm to human health?

A) 2.5 or less

B) 1.5 or less

C) 1.0 or less

D) 5.2 or 2.5

• question_answer150) Which one of the following is the correct statement regarding the particular psychotropic drug specified?

A) Hashish causes alter thought perceptions and hallucinations

B) Opium stimulates nervous system and causes hallucinations

C) Morphine leads to delusions and disturbed emotions

D) Barbiturates cause relaxation and temporary euphoria

• question_answer151) The two subunits of ribosome remain united at a critical ion level of

A) copper

B) manganese

C) magnesium

D) calcium

• question_answer152) During the propagation of a nerve impulse, the action potential results from the movement of

A) ${{K}^{+}}$ions from extracellular fluid to intracellular fluid

B) $N{{a}^{+}}$ions from intracellular fluid to extracellular fluid

C) ${{K}^{+}}$ions from intracellular fluid to extracellular fluid

D) $N{{a}^{+}}$ ions from extracellular fluid to intracellular fluid

• question_answer153) Bacterial leaf blight of rice is caused by a species of

A) Xanthomonas

B) Pseudomonas

C) Altemaria

D) Erwima

• question_answer154) Darwin's finches are an excellent example of

B) seasonal migration

C) brood parasitism

• question_answer155) Earthworms have no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. It is due to

A) coelomic fluid

B) blood

C) gut peristalsis

D) setae

• question_answer156) Which one of the following pair of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?

A) Thymine, Uracil ? Pyrimidines

B) Uracil, Cytosine ? Pyrimidines

• question_answer157) Main objective of production/use of herbicide resistant GM crops is to

A) eliminate weeds from the field without the use of manual labour

B) eliminate weeds from the field without the use of herbicides

C) encourage eco-friendly herbicides

D) reduce herbicide accumulation in food particles for health safety

• question_answer158) The table below gives the populations (in thousands) of ten species (A-J) in four areas (a-d) consisting of the number of habitats given within brackets against each. Study the table and answer the question which follows:

 Area and number of habitats Species and their populations (in thousands) in the areas A B C D E F G H I J a (11) 23 1.2 0.52 6.0 - 3.1 1.1 9.0 - 10.3 b (11) 10.2 - 0.62 - 1.5 3.0 - 8.2 1.1 11.2 c (13) 11.3 0.9 0.48 2.4 1.4 4.2 0.8 8.4 2.2 4.1 d (12) 3.2 10.2 11.1 4.8 0.4 3.3 0.8 7.3 11.3 2.1
Which area out of a to d shows maximum species diversity?

A) b

B) c

C) d

D) a

• question_answer159) To which type of barriers under innate immunity, do the saliva in the mouth and the tears from the eyes, belong?

A) Cytokine barriers

B) Cellular barriers

C) Physiological barriers

D) Physical barriers

• question_answer160) Cornea transplant in humans is almost never rejected. This is because

A) its cells are least penetrable by bacteria

B) it has no blood supply

C) it is composed of enucleated cells

D) it is a non-living layer

• question_answer161) The energy-releasing process in which the substrate is oxidized without an external electron acceptor is called

A) fermentation

B) photorespiration

C) aerobic respiration

D) glycolysis

• question_answer162) Select one of the following pairs of important features distinguishing Gnetum from Cyccu and Pinus and showing affinities with angiosperms

A) absence of resin duct and leaf venation

B) presence of vessel elements and absence of archegonia

C) perianth and two integuments

D) embryo development and apical meristem

• question_answer163) Thorn of Bougainvillea and tendril of Cucurbita are examples of

A) analogous organs

B) homologous organs

C) vestigial organs

D) retrogressive evolution

A) There is a decline in population as boys marry girls only from their own tribe

B) Hereditary diseases like colour blindness do not spread in the isolated population

C) Wrestlers who develop strong body muscles in their life time pass this character on to their progeny

D) There is no change in1 population size as they have a large gene pool

• question_answer165) Human insulin is being commercially produced from a transgenic species of

A) Escherichia

B) Mycobacterium

C) Rhizobium

D) Saccharomyces

• question_answer166) In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one, of the following statement is true about archaea?

A) Archaea resemble eukarya in all respects

B) Archaea have some novel features that are absent in other prokaryotes and eukaryotes

C) Archaea completely differ from both prokaryotes and eukaryotes

D) Archaea completely differ from prokaryotes

• question_answer167) Thermococcus, Methanococcus and Methanobacterium examplify

A) archaebacteria that contain protein homologous to eukaryotic core histones

B) archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled

C) bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria

D) bacteria that contain a cytoskeleton and ribosomes

• question_answer168) A competitive inhibitor of succinic dehydrogenase is

A) malonate

B) oxaloacetate

C) $\text{-}$ketoglutarate

D) malate

• question_answer169) Cry-I endotoxins obtained from Bacillus thuringierisis are effective against

A) mosquitoes

B) flies

C) nematodes

D) boll worms

• question_answer170) Vacuole in a plant cell

A) is membrane-bound and contains storage proteins and lipids

B) is membrane-bound and contains water and excretory substances

C) lacks membrane and contains air

D) lacks membrane and contains water and excretory substances

• question_answer171) Which one of the following is not observed in biodiversity hot spots?

A) Endemism

B) Accelerated species loss

C) Lesser inter specific competition

D) Species richness

• question_answer172) Consider the statements given below regarding contraception and answer as directed thereafter

A) (A) Medical Termination of Pregnancy (MTP) during first trimester is generally safe (B) Generally chances of conception are nil until mother breast-feeds the infant upto two year (C) Intrauterine devices like copper-T are effective contraceptives (D) Contraception pills may be taken upto one week after coitus to prevent conception. Which two of the above statements are correct? B, C

B) C, D

C) A, C

D) A, B

• question_answer173) Which one of the following proved effective for biological control of nematodal diseases in plants?

A) Pisolithus tinctorius

B) Pseudomonas cepacin

• question_answer174) Which one of the following condition in humans is correctly matched with its chromosomal abnormality/linkage?

A) Klinefelter's syndrome?44 autosomes + XXY

D) Down syndrome?44 autosomes + XO

• question_answer175) Which one of the following item gives its correct total number?

A) Floating ribs in humans ? 4

B) Amino acids found in proteins ? 16

C) Types of diabetes ? 3

D) Cervical vertebrae in humans ? 8

• question_answer176) In germinating seeds fatty acids are degraded exclusively in the

A) proplastids

B) glyoxisomes

C) peroxisomes

D) mitochondria

• question_answer177) What does the filiform apparatus do at the entrance into ovule?

A) It helps in the entry of pollen tube into a synergid

B) It prevents entry of more than one pollen tube into the embryo sac

C) It brings about opening of the pollen tube

D) It guides pollen tube from a synergid to egg

• question_answer178) Which one of the following is being tried in India as a biofuel substitute for fossil fuels?

A) Jatropha

C) Musa

D) Aegilops

• question_answer179) Which one of the following is resistant to enzyme action?

A) Cork

B) Wood fibre

C) Pollen exine

D) Leaf cuticle

• question_answer180) What is antisense technology?

A) A cell displaying a foreign antigen used for synthesis of antigens.

B) Production of somaclonal variants in tissue cultures.

C) When a piece of RNA that is complementary in sequence is used to stop expression of a specific gene

D) RNA polymerase producing DNA

• question_answer181) Haploids are more suitable for mutation studies than the diploids. This is because

A) haploids are reproductively more stable than diploids

B) mutagenes penetrate in haploids more effectively than is diploids

C) haploids are more abundant in nature than diploids

D) all mutations, whether dominant or recessive are expressed in haploids

• question_answer182) Which one of the following is not. A characteristic of phylum-Annelida?

A) Closed circulatory system

B) Segmentation

C) Pseudocoelom

D) Ventral nerve cord

• question_answer183) Importance of day length in flowering of plants was first shown in

A) Lemna

B) tobacco

C) cotton

D) Petunia

• question_answer184) In humans, blood passes from the post caval to the diastolic right atrium of heart due to

A) pushing open of the venous valves

B) suction pull

C) stimulation of the sino auricular node

D) pressure difference between the caval and atrium

• question_answer185) Which one of the following is the true description about an animal concerned?

A) Earthworm ? The alimentary canal consists of a sequence of pharynx, oesophagus, stomach, gizzard and intestine

B) Frog ? Body divisible into three regions? head, neck and trunk

C) Rat ? Left kidney is slightly higher in position than the right one

D) Cockroach ? 10 pairs of spiracles (2 pairs on thorax and 8 pairs on abdomen)

• question_answer186) The linking of antibiotic resistance gene with the plasmid vector became possible with

A) DNA ligase

B) endonucleases

C) DNA polymerase

D) exonucleases

• question_answer187) Which one of the following statement is incorrect about menstruation?

A) During normal menstruation about 40 mL blood is lost

B) The menstrual fluid can easily clot

C) At menopause in the female, there is especially abrupt increase in gonadotropic hormones

D) The beginning of the cycle of menstruation is called menarche

• question_answer188) Which one of the following phyla is correctly matched with its two general characteristics?

A) Arthropoda ? Body divided into head, thorax and abdomen and respiration by tracheae

B) Chordata ? Notochord at some stage and separate anal and urinary openings to the outside

C) Echinodermata ? Pentamerous radial symmetry and mostly internal fertilization

D) Mollusca ? Normally oviparous and development through a trochophore or veliger larva

• question_answer189) Which one of the following pair of items correctly belongs to the category of organs mentioned against it?

A) Thorn of ? Analogous organs Bougainvillea and tendrils of Cucurbita

B) Nictitating ? Vestigial organs membrane and blind spot in human eye

C) Nephridia ? Excretory organs of earthworm and Malpighian tubules of cockroach

D) Wings of honey bee ? Homologous organs and wings of crow

• question_answer190) The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that Adenosine Triphosphate (ATP) is formed because

A) high energy bonds are formed in mitochondrial proteins

B) ADP is pumped out of the matrix into the Inter membrane space

C) a proton gradient forms across the inner membrane

D) there is a change in the permeability of the inner mitochondrial membrane toward Adenosine Diphosphate (ADP)

A) (A) During open heart surgery blood is circulated in the heart-lung machine. (B) Blockage in coronary arteries is removed by angiography. (C) Computerized Axial Tomography (CAT) shows detailed internal structure as seen in a section of body. (D) X-ray provides clear and detailed images of organs like prostate glands and lungs. Which two of the above statements are correct? B and D

B) C and D

C) A and C

D) A and B

• question_answer192) Consider the following statements concerning food chains

A) (A) removal of 80% tigers from an area resulted in greatly increased growth of vegetation (B) removal of most of the carnivores resulted in an increased population of deers (C) the length of food chains is generally limited to 3-4 trophic levels due to energy loss (D) the length of food chains may vary from 2 to 8 trophic levels Which two of the above statements are correct? B and C

B) C and D

C) A and D

D) A and B

• question_answer193) Ascaris is characterised by

A) absence of true coelom but presence of metamerism

B) presence of neither true coelom nor metamerism

C) presence of true coelom but absence of metamerism

D) presence of true coelom and mesmerism (metamerisation)

• question_answer194) Consider the following four statements (A-D) about certain desert animals such as kangaroo rat

A) (A) they have dark colour and high rate of reproduction and excrete solid urine. (B) they do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs. (C) they feed on dry seeds and do not require drinking water. (D) they excrete very concentrated urine and do not use water to regulate body temperature. Which two of the above statements for such animals are true? C and D

B) B and C

C) C and A

D) A and B

• question_answer195) Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin of life?

A) They were able to reproduce

B) They could separate combinations of molecules from the surroundings

C) They were partially isolated from the surroundings

D) They could' maintain an internal environment

• question_answer196) Which one of the following groups of three animals each is correctly matched with their one characteristic morphological feature?

A) Animals , Liver fluke, sea- cucumber Morphological Feature Bilateral symmetry

B) Animals Centipede, prawn, sea urchain - Morphological Feature Jointed appendages

C) Animals Scorpion, spider, cockroach- Morphological Feature Ventral solid central nervous system,

D) Animals Cockroach, locust, Taenia- Morphological Feature Metameric segmentation

• question_answer197) The fruit is chambered, developed from inferior ovary and has seeds with succulent testa in

A) pomegranate

B) orange

C) guava

D) cucumber

• question_answer198) Which one of the following is the correct percentage of the two (out of the total of 4) green-house gases that contribute to the total global warming?

A) $CFCs\,14%,\,\,C{{H}_{4}}20%$

B) $C{{O}_{2}}40%,CFCs30%$

C) ${{N}_{2}}O6%,C{{O}_{2}}86%$

D) $C{{H}_{4}}20%,{{N}_{2}}O18%$

• question_answer199) World Summit on Sustainable Development (2002) was held in

A) Brazil

B) Sweden

C) Argentina,

D) South Africa

• question_answer200) Quercus species are the dominant component in

A) temperate deciduous forests

B) alpine forests

C) scrub forests

D) tropical rain forests