# Solved papers for NEET AIPMT SOLVED PAPER SCREENING 2012

### done AIPMT SOLVED PAPER SCREENING 2012 Total Questions - 200

• question_answer1) Electron in hydrogen atom first jumps from third excited state to second excited state and then from second excited to the first excited state. The ratio of the wavelengths ${{\lambda }_{1}}:{{\lambda }_{2}}$emitted in the two cases is

A)
7/5

B)
27/20

C)
27/5

D)
20/7

• question_answer2) When a string is divided into three segments of lengths ${{l}_{1}},{{l}_{2}}$ and ${{l}_{3}},$ the fundamental frequencies of these three segments are${{v}_{1}},{{v}_{2}}$ and ${{v}_{3}}$ respectively.   The   original fundamental frequency (v) of the string is

A)
$\sqrt{v}=\sqrt{{{v}_{1}}}+\sqrt{{{v}_{2}}}+\sqrt{{{v}_{3}}}$

B)
$v={{v}_{1}}+{{v}_{2}}+{{v}_{3}}$

C)
$\frac{1}{v}=\frac{1}{{{v}_{1}}}+\frac{1}{{{v}_{2}}}+\frac{1}{{{v}_{3}}}$

D)
$\frac{1}{\sqrt{v}}=\frac{1}{\sqrt{{{v}_{1}}}}+\frac{1}{\sqrt{{{v}_{2}}}}+\frac{1}{\sqrt{{{v}_{3}}}}$

• question_answer3) A 200 W sodium street lamp emits yellow light of wavelength 0.6 um. Assuming it to be 25% efficient in converting electrical energy to light, the number of photons of yellow light it emits per second is

A)
$1.5\times {{10}^{20}}$

B)
$6\times {{10}^{18}}$

C)
$62\times {{10}^{20}}$

D)
$3\times {{10}^{19}}$

• question_answer4) Two ideal diodes are connected to a battery as shown in the circuit. The current supplied by the battery is

A)
0.75 A

B)
zero

C)
0.25 A

D)
0.5 A

• question_answer5) When a mass is rotating in a plane about a fixed point, its angular momentum is directed along

A)
a line perpendicular to the plane of rotation

B)
the line making an angle of 45° to the plane of rotation

C)

D)
the tangent to the orbit

• question_answer6) An electric dipole of moment p is placed in an electric field of intensity E. The dipole acquires a position such that the axis of the dipole makes an angle $\theta$ with the direction of the field. Assuming that the potential energy of the dipole to be zero when $\theta ={{90}^{0}}$, the torque and the potential energy of the dipole will respectively be

A)
$pE\sin \theta ,\,-pE\cos \theta$

B)
$pE\sin \theta ,-2\,pE\cos \theta$

C)
$pE\sin \theta ,-2pE\cos \theta$

D)
$pE\cos \theta ,-pE\sin \theta$

• question_answer7) In a CE transistor amplifier, the audio signal voltage across the collector resistance of $2\,k\Omega$ is 2V. If the base resistance is $1\,k\Omega$ and the current amplification of the transistor is 100, the input signal voltage is

A)
0.1V

B)
1.0V

C)
1 mV

D)
10 mV

• question_answer8) A coil of resistance $400\,\Omega$ is placed in a magnetic field. If the magnetic flux $\phi$ (Wb) linked with the coil varies with time t (sec) as$\phi =50\,{{t}^{2}}+4.$ The current in the coil at t = 2 s is

A)
0.5 A

B)
0.1 A

C)
2 A

D)
1 A

• question_answer9) A thermodynamic system is taken through the cycle ABCD as shown in figure. Heat rejected by the gas during the cycle is

A)
$2\,pV$

B)
$4\,pV$

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

D)
$pV$

• question_answer10) If the nuclear radius of $^{27}Al$ is 3.6 Fermi, the approximate nuclear radius of $^{64}Cu$ in Fermi is

A)
2.4

B)
1.2

C)
4.8

D)
3.6

• question_answer11) Two similar coils of radius R are lying concentrically with their planes at right angles to each other. The currents flowing in them are $I$ and $2I,$ respectively. The resultant magnetic field induction at the centre will be

A)
$\frac{\sqrt{5}{{\mu }_{0}}I}{2R}$

B)
$\frac{3{{\mu }_{0}}I}{2R}$

C)
$\frac{{{\mu }_{0}}I}{2R}$

D)
$\frac{{{\mu }_{0}}I}{R}$

• question_answer12) The potential energy of a particle in a force field is $U=\frac{A}{{{r}^{2}}}-\frac{A}{r},$ where A and B are positive constants and r is the distance of particle from the centre of the field. For  stable equilibrium, the distance of the particle is

A)
B/2A

B)
2A/B

C)
A/B

D)
B/A

• question_answer13) When a biconvex lens of glass having refractive index 1.47 is dipped in a liquid, it acts as a plane sheet of glass. This implies that the liquid must have refractive index

A)
equal to that of glass

B)
less than one

C)
greater than that of glass

D)
less than that of glass

• question_answer14) The horizontal range and the maximum height of a projectile are equal. The angle of projection of the projectile is

A)
$\theta ={{\tan }^{-1}}\left( \frac{1}{4} \right)$

B)
$\theta ={{\tan }^{-1}}(4)$

C)
$\theta ={{\tan }^{-1}}(2)$

D)
$\theta ={{45}^{o}}$

• question_answer15) In an electrical circuit R, L, C and an AC voltage source are all connected in series. When L is removed from the circuit, the phase difference between the voltage and the current in the circuit is $\pi /3.$If instead, C is removed from the circuit, the phase difference is again $\pi /3.$The power factor of the circuit is

A)
1/2

B)
$1/\sqrt{2}$

C)
1

D)
$\sqrt{3}/2$

• question_answer16) If the radius of a star is R and it acts as a black body, what would be the temperature of the star, in which the rate of energy production is Q? ($\sigma$ stands for Stefan's constant.)

A)
$Q/4\pi {{R}^{2}}\sigma$

B)
${{(Q/4\pi {{R}^{2}}\sigma )}^{-1/2}}$

C)
${{(4\pi {{R}^{2}}Q/\sigma )}^{1/4}}$

D)
${{(Q/4\pi {{R}^{2}}\sigma )}^{1/4}}$

• question_answer17) The current (I) in the inductance is varying with time according to the plot shown in figure. Which one of the following is the correct variation of voltage with time in the coil?

A)

B)

C)

D)

• question_answer18) A millivoltmeter of 25 mV range is to be converted into an ammeter of 25 A range. The value (in ohm) of necessary shunt will be

A)
0.001

B)
0.01

C)
1

D)
0.05

• question_answer19) Two persons of masses 55 kg and 65 kg respectively, are at the opposite ends of a boat. The length of the boat is 3.0 m and weighs 100 kg. The 55 kg man walks up to the 65 kg man and sits with him. If the boat is in still water the centre of mass of the system shifts by

A)
3.0 m

B)
2.3 m

C)
zero

D)
0.75 m

• question_answer20) A mixture consists of two radioactive materials ${{A}_{1}}$ and ${{A}_{2}}$ with half lives of 20 s and 10 s respectively. Initially the mixture has 40 g of ${{A}_{1}}$ and 160 g of ${{A}_{2}}$. The amount of the two in the mixture will become equal after

A)
60 s

B)
80 s

C)
20 s

D)
40 s

• question_answer21) C and Si both have same lattice structure, having 4 bonding electrons in each. However, C is insulator whereas Si is intrinsic semiconductor. This is because

A)
in case of C, the valence band is not completely filled at absolute zero temperature

B)
in case of C, the conduction band is partly filled even at absolute zero temperature

C)
the four bonding electrons in the case of C lie in the second orbit, whereas in the case of Si they lie in the third

D)
the four bonding electrons in the case of C lie in the third orbit, whereas for Si they lie in the fourth orbit

• question_answer22) The height at which the weight of a body becomes 1/16th, its weight on the surface of earth (radius R), is

A)
5R

B)
15R

C)
3R

D)
4R

• question_answer23) An electron of a stationary hydrogen atom passes from the fifth energy level to the ground level. The velocity that the atom acquired as a result of photon emission will be

A)
$\frac{24\,hR}{25\,m}$

B)
$\frac{25\,hR}{24\,m}$

C)
$\frac{25\,m}{24\,h\,R}$

D)
$\frac{24\,m}{25\,h\,R}$ (m is the mass of the electron, R Rydberg constant and h Planck's constant)

• question_answer24) A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It

A)
will become rigid showing no movement

B)
will stay in any position

C)
will stay in north-south direction only

D)
will stay in east-west direction only

• question_answer25) In the circuit shown the cells A and -B have negligible resistances. For ${{V}_{A}}=12\,V,$ ${{R}_{1}}=500\,\Omega$ and $R=100\,\Omega$ the galvanometer (G) shows no deflection. The value of ${{V}_{B}}$ is

A)
4 V

B)
2 V

C)
12 V

D)
6 V

• question_answer26) Four point charges -Q,-q, 2q and 2Q are placed, one at each comer of the square. The relation between Q and q for which the potential at the centre of the square is zero, is

A)
$Q=-q$

B)
$Q=-\frac{1}{q}$

C)
$Q=q$

D)
$Q=\frac{1}{q}$

• question_answer27) A car of mass 1000 kg negotiates a banked curve of radius 90 m on a frictionless road. If the banking angle is 45°, the speed of the car is

A)
$\text{20}\,\text{m}{{\text{s}}^{\text{-1}}}$

B)
$\text{30}\,\text{m}{{\text{s}}^{\text{-1}}}$

C)
$5\,\text{m}{{\text{s}}^{\text{-1}}}$

D)
$10\,\text{m}{{\text{s}}^{\text{-1}}}$

• question_answer28) A solid cylinder of mass 3 kg is rolling on a horizontal surface with velocity$4\,\text{m}{{\text{s}}^{\text{-1}}}$.It collides with a horizontal spring of force constant$\text{200}\,\text{N}{{\text{m}}^{\text{-1}}}$. The maximum compression produced in the spring will be

A)
0.5 m

B)
0.6 m

C)
0.7 m

D)
0.2 m

• question_answer29) One mole of an ideal gas goes from an initial state A to final state B via two processes. It first undergoes isothermal expansion from volume V to 3V and then its volume is reduced from 3V to V at constant pressure. The correct p-V diagram representing the two processes is

A)

B)

C)

D)

• question_answer30) Two spheres A and B of masses m1 and m2 respectively collide. A is at rest initially and B is moving with-velocity v along x-axis. After collision B has a velocity$\frac{v}{2}$ in a direction perpendicular to the original direction. The mass A moves after collision in the direction

A)
same as that of B

B)
opposite to that of B

C)
$\theta ={{\tan }^{-1}}\left( \frac{1}{2} \right)$to the x-axis

D)
$\theta ={{\tan }^{-1}}\left( \frac{-1}{2} \right)$

• question_answer31) Liquid oxygen at 50 K is heated to 300 K at constant pressure of 1 atm. The rate of heating is constant. Which one of the following graphs represents the variation of temperature with time?

A)

B)

C)

D)

• question_answer32) An alternating electric field of frequency v, is applied across the dees (radius =R) of a cyclotron that is being used to accelerate protons (mass = m). The operating magnetic field (B) used in the cyclotron and the kinetic energy (1C) of the proton beam, produced by it, are given by

A)
$B=\frac{mv}{e}$and$K=2m{{\pi }^{2}}{{v}^{2}}{{R}^{2}}$

B)
$B=\frac{2\pi mv}{e}$and$K={{m}^{2}}\pi v{{R}^{2}}$

C)
$B=\frac{2\pi mv}{e}$and$K=2m{{\pi }^{2}}{{v}^{2}}{{R}^{2}}$

D)
$B=\frac{mv}{e}$and$K={{m}^{2}}\pi v{{R}^{2}}$

• question_answer33) A spherical planet has a mass ${{M}_{p}}$ and diameter ${{D}_{p}}$. A particle of mass m falling freely near the surface of this planet will experience an acceleration due to gravity, equal to

A)
$4G{{M}_{p}}/D_{p}^{2}$

B)
$G{{M}_{p}}m/D_{p}^{2}$

C)
$G{{M}_{p}}m/D_{p}^{2}$

D)
$4G{{M}_{p}}m/D_{p}^{2}$

• question_answer34) A ray of light is incident at an angle of incidence, i, on one face of a prism of angle A (assumed to be small) and emerges normally from the opposite face. If the refractive index of the prism is $\mu ,$the angle of incidence i, is nearly equal to

A)
$\mu A$

B)
$\frac{\mu A}{2}$

C)
$A/\mu$

D)
$A/2\mu$

• question_answer35) The damping force on an oscillator is directly proportional to the velocity. The units of the constant of proportionality are

A)
$\text{kg}\,\text{m}{{\text{s}}^{\text{-1}}}$

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

C)
$\text{kg}\,{{\text{s}}^{\text{-1}}}$

D)
$\text{kg}\,\text{s}$

• question_answer36) A concave mirror of focal length ${{f}_{1}}$is placed at a distance of d from a convex lens of focal length ${{f}_{2}}$. A beam of light coming from infinity and falling on this convex lens concave mirror combination returns to infinity. The distance d must be equal

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

B)
$-{{f}_{1}}+{{f}_{2}}$

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

D)
$-2{{f}_{1}}+{{f}_{2}}$

• question_answer37) A geostationary satellite is orbiting the earth at a height of 5R above that surface of the earth, R being the radius of the earth. The time period of another satellite in hours at a height of 2 R from the surface of the earth is

A)
5

B)
10

C)
$6\sqrt{2}$

D)
$6/\sqrt{2}$

• question_answer38) Transfer characteristic [output voltage $({{V}_{0}})$ vs input voltage $({{V}_{i}})$] for a base biased transistor in CE configuration is as shown in the figure. For using transistor as a switch, it is used

A)
in region III

B)
both in region (I) and (III)

C)
in region II

D)
in region I

• question_answer39) If voltage across a bulb rated 220 V-100 W drops by 2.5% of its rated value, the percentage of the rated value by which the power would decrease is

A)
20%

B)
2.5%

C)
5%

D)
10%

• question_answer40) A particle has initial velocity (2i + 3j) and acceleration (0.3 i + 0.2 j). The magnitude of velocity after 10 s will be

A)
$9\sqrt{2}$units

B)
$5\sqrt{2}$units

C)
5 units

D)
9 units

• question_answer41) Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state irradiates a photosensitive material. The stopping potential is measured to be 3.57 V. The threshold frequency of the material is

A)
$\text{4 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{15}}}\,{{\text{H}}_{\text{Z}}}$

B)
$\text{5 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{15}}}\,{{\text{H}}_{\text{Z}}}$

C)
$\text{1}\text{.6 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{15}}}\,{{\text{H}}_{\text{Z}}}$

D)
$\text{2}\text{.5 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{15}}}\,{{\text{H}}_{\text{Z}}}$

• question_answer42) ABC is an equilateral triangle with O as its centre. ${{F}_{1}},{{F}_{2}}$ and ${{F}_{3}}$ represent three forces acting along the sides AB, BC and AC respectively. If the total torque about O is zero then the magnitude of ${{F}_{3}}$ is

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

B)
${{F}_{1}}-{{F}_{2}}$

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

D)
$2({{F}_{1}}+{{F}_{2}})$

• question_answer43) The figure shows a logic circuit with two inputs A and B and the output C. The voltage wave forms across A, B and C are as given. The logic circuit gate is

A)
OR gate

B)
NOR gate

C)
AND gate

D)
NAND gate

• question_answer44) What is the through a cube of side a if a point charge of q is a one of its corner?

A)
$\frac{2q}{{{\varepsilon }_{0}}}$

B)
$\frac{q}{8{{\varepsilon }_{0}}}$

C)
$\frac{q}{{{\varepsilon }_{0}}}$

D)
$\frac{q}{2{{\varepsilon }_{0}}}6{{a}^{2}}$

• question_answer45) An $\text{-}$particle moves in a circular path of radius 0.83 cm in the presence of a magnetic field of $0.25\,\,Wb/{{m}^{2}}$. The de-Broglie wavelength associated with the particle will be

A)
$1\,\,\overset{\text{o}}{\mathop{\text{A}}}\,$

B)
$0.1\,\,\overset{\text{o}}{\mathop{\text{A}}}\,$

C)
$10\,\,\overset{\text{o}}{\mathop{\text{A}}}\,$

D)
$0.01\,\,\overset{\text{o}}{\mathop{\text{A}}}\,$

• question_answer46) The electric field associated with an electromagnetic wave in vacuum is given by $E=i\,40\,\cos \,(kz-6\times {{10}^{8}}t),$ where E, z and t are in volt/m, metre and. second respectively. The value of wave vector k is

A)
$\text{2}\,{{\text{m}}^{\text{-1}}}$

B)
$\text{0}\text{.5}\,{{\text{m}}^{\text{-1}}}$

C)
$6\,{{\text{m}}^{\text{-1}}}$

D)
$3\,{{\text{m}}^{\text{-1}}}$

• question_answer47)                 The motion of a particle along a straight line is described by equation$x=8+12\,t-{{t}^{3}}$where, x is in metre and t in second. The retardation of the particle when its velocity becomes zero, is

A)
24 $\text{m}{{\text{s}}^{\text{-2}}}$

B)
zero

C)
6 $\text{m}{{\text{s}}^{\text{-2}}}$

D)
12 $\text{m}{{\text{s}}^{\text{-2}}}$

• question_answer48) The magnifying power of a telescope is. 9. When it is adjusted for parallel rays the distance between the objective and eyepiece is 20 cm. The focal length of lenses are

A)
10 cm, 10 cm

B)
15 cm, 5 cm

C)
18 cm, 2 cm

D)
11 cm, 9cm

• question_answer49) Two sources of sound placed close to each other, are emitting progressive waves given by ${{y}_{1}}4\sin 600\pi t$and${{y}_{2}}=5\sin 608\pi t$ An observer located near these two sources of sound will hear

A)
4 beats per second with intensity ratio 25 : 16 between waxing and waning

B)
8 beats per second with intensity ratio 25 : 16 between waxing and waning

C)
8 beats per second with intensity ratio 81:1 between waxing and waning

D)
4 beats per second with intensity ratio 81:1 between waxing and waning

• question_answer50) A ring is made of a wire having a resistance ${{R}_{0}}=12\,\Omega$. Find the points A and B, as shown in the figure, at which a current carrying conductor should be connected so that the resistance R of the sub circuit between these points is equal to $8/3\,\,\Omega$

A)
$\frac{{{l}_{1}}}{{{l}_{2}}}=\frac{5}{8}$

B)
$\frac{{{l}_{1}}}{{{l}_{2}}}=\frac{1}{3}$

C)
$\frac{{{l}_{1}}}{{{l}_{2}}}=\frac{3}{8}$

D)
$\frac{{{l}_{1}}}{{{l}_{2}}}=\frac{1}{2}$

• question_answer51) Aluminium is extracted from alumina $(A{{l}_{2}}{{O}_{3}})$ by electrolysis of a molten mixture of

A)
$A{{l}_{2}}{{O}_{3}}+HF+NaAl{{F}_{4}}$

B)
$A{{l}_{2}}{{O}_{3}}+Ca{{F}_{2}}+NaAl{{F}_{4}}$

C)
$A{{l}_{2}}{{O}_{3}}+N{{a}_{3}}Al{{F}_{6}}+Ca{{F}_{2}}$

D)
$A{{l}_{2}}{{O}_{3}}+KF+N{{a}_{3}}Al{{F}_{6}}$

• question_answer52) pH of a saturated solution of $Ba{{(OH)}_{2}}$ is 12. The value of solubility product K of $Ba{{(OH)}_{2}}$ is

A)
$3.3\times {{10}^{-7}}$

B)
$5.0\times {{10}^{-7}}$

C)
$4.0\times {{10}^{-6}}$

D)
$5.0\times {{10}^{-6}}$

• question_answer53) When $\text{C}{{\text{l}}_{\text{2}}}$ gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from

A)
zero to +1 and zero to -5

B)
zero to -1 and zero to +5

C)
zero to -1 and zero to +3

D)
zero to +1 and zero to -3

• question_answer54) Maximum number of electrons in a sub shell with $l=3$ and n = 4 is

A)
14

B)
16

C)
10

D)
12

• question_answer55) Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour?

A)
${{\text{ }\!\![\!\!\text{ Ni(N}{{\text{H}}_{\text{3}}}{{\text{)}}_{\text{6}}}\text{ }\!\!]\!\!\text{ }}^{\text{2+}}}$

B)
${{\text{ }\!\![\!\!\text{ Zn(N}{{\text{H}}_{\text{3}}}{{\text{)}}_{\text{6}}}\text{ }\!\!]\!\!\text{ }}^{\text{2+}}}$

C)
${{\text{ }\!\![\!\!\text{ Cr(N}{{\text{H}}_{\text{3}}}{{\text{)}}_{\text{6}}}\text{ }\!\!]\!\!\text{ }}^{\text{3+}}}$

D)
${{\text{ }\!\![\!\!\text{ Co(N}{{\text{H}}_{\text{3}}}{{\text{)}}_{\text{6}}}\text{ }\!\!]\!\!\text{ }}^{\text{3+}}}$

• question_answer56) In a reaction, $\text{A}\,\text{+}\,\text{B}\to$ Product, rate is doubled when the concentration of B is doubled, and rate increases by a factor of 8 when the concentrations of both the reactants (A and B) are doubled. Rate law for the reaction can be written as

A)
$\text{Rate}\,\text{=}\,\text{k}\,\text{ }\!\![\!\!\text{ A }\!\!]\!\!\text{ }\,{{\text{ }\!\![\!\!\text{ B }\!\!]\!\!\text{ }}^{\text{2}}}$

B)
$\text{Rate}\,\text{=}\,\text{k}\,{{\text{ }\!\![\!\!\text{ A }\!\!]\!\!\text{ }}^{\text{2}}}\,{{\text{ }\!\![\!\!\text{ B }\!\!]\!\!\text{ }}^{\text{2}}}$

C)
$\text{Rate}\,\text{=}\,\text{k}\,\text{ }\!\![\!\!\text{ A }\!\!]\!\!\text{ }\,\text{ }\!\![\!\!\text{ B }\!\!]\!\!\text{ }$

D)
$\text{Rate}\,\text{=}\,\text{k }\!\![\!\!\text{ A}{{\text{ }\!\!]\!\!\text{ }}^{\text{2}}}\text{ }\!\![\!\!\text{ B }\!\!]\!\!\text{ }$

• question_answer57) In which of the following reactions, standard reaction entropy changes $(\Delta {{S}^{\text{o}}})$ is positive and standard Gibb's energy change $(\Delta {{G}^{\text{o}}})$ decreases sharply with increasing temperature?

A)
$\text{C}\,\text{(graphite)}+\frac{1}{2}{{O}_{2}}(g)\xrightarrow[{}]{{}}CO(g)$

B)
$CO(g)+\frac{1}{2}{{O}_{2}}(g)\xrightarrow[{}]{{}}C{{O}_{2}}(g)$

C)
$Mg(s)+\frac{1}{2}{{O}_{2}}(g)\xrightarrow[{}]{{}}MgO(s)$

D)
$\frac{1}{2}C(\text{graphite})+\frac{1}{2}{{O}_{2}}(g)\xrightarrow[{}]{{}}\frac{1}{2}C{{O}_{2}}(g)$

• question_answer58) Which one of the following is a mineral of iron?

A)
Malachite

B)
Cassiterite

C)
Pyrolusite

D)
Magnetite

A)
between 0 and 1 in all cases

B)
between 2 and 4 in all cases

C)
1 in case of physical adsorption

D)
1 in case of chemisorption

• question_answer60) Equimolar solutions of the following substances were prepared separately. Which one of these will record the highest pH value?

A)
$\text{BaC}{{\text{l}}_{\text{2}}}$

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

C)
$\text{LiCl}$

D)
$\text{BeC}{{\text{l}}_{\text{2}}}$

• question_answer61) 50 mL of each gas A and of gas B takes 150 and 200 s respectively for effusing through a pin hole under the similar conditions. If molecular mass of gas B is 36, the molecular mass of gas A will be

A)
96

B)
128

C)
32

D)
64 No option is correct

• question_answer62) The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is

A)
$5,1,1,+\frac{1}{2}$

B)
$6,0,0,+\frac{1}{2}$

C)
$5,0,0,+\frac{1}{2}$

D)
$5,1,0,+\frac{1}{2}$

• question_answer63) In which of the following compounds, nitrogen exhibits highest oxidation state?

A)
${{\text{N}}_{\text{2}}}{{\text{H}}_{\text{4}}}$

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

C)
${{\text{N}}_{\text{3}}}\text{H}$

D)
$\text{N}{{\text{H}}_{\text{2}}}\text{OH}$

• question_answer64) Predict the products in the given reaction,

A)

B)

C)

D)

• question_answer65) Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is

A)
$\text{C}{{\text{H}}_{\text{3}}}\text{C}{{\text{H}}_{\text{2}}}\text{C}{{\text{H}}_{\text{2}}}\text{-}\overset{\begin{smallmatrix} \text{O} \\ \text{ }\!\!|\!\!\text{ }\!\!|\!\!\text{ } \end{smallmatrix}}{\mathop{\text{C}}}\,\text{-C}{{\text{H}}_{\text{3}}}$

B)
$\text{C}{{\text{H}}_{\text{3}}}\text{C}{{\text{H}}_{\text{2}}}\text{C}{{\text{H}}_{\text{2}}}\text{-}\overset{\begin{smallmatrix} \text{O} \\ \text{ }\!\!|\!\!\text{ }\!\!|\!\!\text{ } \end{smallmatrix}}{\mathop{\text{C}}}\,\text{-C}{{\text{H}}_{2}}\text{C}{{\text{H}}_{\text{2}}}\text{C}{{\text{H}}_{\text{3}}}$

C)

D)

• question_answer66) A metal crystallizes with a face-centered cubic lattice. The edge of the unit cell is 408 pm. The diameter of the metal atom is

A)
288 pm

B)
408 pm

C)
144 pm

D)
204 pm

• question_answer67) Which one of the following statements is incorrect about enzyme catalysis?

A)
Enzymes are mostly protein us in nature

B)
Enzyme action is specific

C)
Enzymes are denaturized by ultraviolet rays and at high temperature

D)
Enzymes are least reactive at optimum temperature

• question_answer68) In a zero order reaction for every 10° rise of temperature, the rate is doubled. If the temperature is increased from 10°C to 100°C, the rate of the reaction will become

A)
256 times

B)
512 times

C)
64 times

D)
128 times

• question_answer69) Deficiency of vitamin ${{B}_{1}}$ causes the disease

A)
convulsions

B)
beri-beri

C)
cheilosis

D)
sterility

• question_answer70) Among the following compounds the one that is most reactive towards electrophilic nitration is

A)
benzoic acid

B)
nitrobenzene

C)
toluene

D)
benzene

• question_answer71) Buffer solutions have constant acidity and alkalinity because

A)
these give unionised acid or base on reaction with added acid or alkali

B)
acids and alkalies in these solutions are shielded from attack by other ions

C)
they have large excess of ${{H}^{+}}$ or $O{{H}^{-}}$ ions

D)
they have fixed value of Ph

• question_answer72) The correct order of decreasing acid strength of trichloroacedc acid (A), trifluoroacetic acid (B), acetic acid (C) and formic acid (23) is

A)
B > A > D > E

B)
B > D > C > A

C)
A > B > C > D

D)
A > C > B > D

• question_answer73) Which one of the following sets of monosaccharide?s forms sucrose?

A)
$\text{-}$D-galactopyranose and $\text{-}$D-glucopyranose

B)
$\text{-}$D-glucopyranose and $\text{-}$D-fructofuranose

C)
$\text{-}$D-glucopyranose and $\text{-}$D-fructofuranose

D)
$\text{-}$D-glucopyranose and $\text{-}$D-fructopyranose

• question_answer74) The enthalpy of fusion of water is kcal/mol. The molar entropy change for the melting of ice at 0°C is

A)
10.52 cal/(mol K)

B)
21.04 cal/(mol K)

C)
5.260 cal/ (mol K)

D)
0.526 cal/(mol K)

• question_answer75) Which one of the following pairs is isostructural (i.e., having the same shape and hybridization)?

A)
$\text{ }\!\![\!\!\text{ BC}{{\text{l}}_{\text{3}}}\,\text{and}\,\text{BrC}{{\text{l}}_{\text{3}}}\text{ }\!\!]\!\!\text{ }$

B)
$\text{ }\!\![\!\!\text{ N}{{\text{H}}_{\text{3}}}\,\text{and}\,\text{NO}_{\text{3}}^{\text{-}}\text{ }\!\!]\!\!\text{ }$

C)
$\text{ }\!\![\!\!\text{ N}{{\text{F}}_{\text{3}}}\,\text{and}\,\text{B}{{\text{F}}_{\text{3}}}\text{ }\!\!]\!\!\text{ }$

D)
$\text{ }\!\![\!\!\text{ BF}_{\text{4}}^{\text{-}}\,\text{and}\,\text{NH}_{\text{4}}^{\text{+}}\text{ }\!\!]\!\!\text{ }$

• question_answer76) Bond order of 1.5 is shown by

A)
$\text{O}_{\text{2}}^{\text{+}}$

B)
$\text{O}_{\text{2}}^{-}$

C)
$\text{O}_{\text{2}}^{2-}$

D)
$\text{O}_{\text{2}}^{{}}$

• question_answer77) Which one of the following is not a condensation polymer?

A)
Melamine

B)
Glyptal

C)
Dacron

D)
Neoprene

• question_answer78) In the following sequence of reactions, $C{{H}_{3}}-Br\xrightarrow[{}]{KCN}A\xrightarrow[{}]{{{H}_{3}}{{O}^{+}}}B\xrightarrow[ether]{LiAl{{H}_{4}}}C$ the end product (C) is

A)
acetone

B)
methane

C)
acetaldehyde

D)
ethyl alcohol

• question_answer79) Which nomenclature is not according to IUPAC system?

A)
$\underset{\text{1-bromo}\,\text{pro-2-ene}}{\mathop{\text{Br-C}{{\text{H}}_{\text{2}}}\text{-CH=C}{{\text{H}}_{\text{2}}}}}\,$

B)
$\underset{4-bromo-2,\,4-dimethylhexane}{\mathop{\text{C}{{\text{H}}_{\text{3}}}-\text{C}{{\text{H}}_{\text{2}}}-\underset{\begin{smallmatrix} \text{ }\!\!|\!\!\text{ } \\ \text{Br} \end{smallmatrix}}{\overset{\begin{smallmatrix} \text{C}{{\text{H}}_{\text{3}}} \\ \text{ }\!\!|\!\!\text{ } \end{smallmatrix}}{\mathop{\text{C}}}}\,-\text{C}{{\text{H}}_{\text{2}}}-\underset{\begin{smallmatrix} \text{ }\!\!|\!\!\text{ } \\ \text{C}{{\text{H}}_{\text{3}}} \end{smallmatrix}}{\mathop{\text{C}}}\,\text{HC}{{\text{H}}_{\text{3}}}}}\,$

C)

D)
$\underset{\text{5-oxohexanoic}\,\text{acid}}{\mathop{\text{C}{{\text{H}}_{\text{3}}}-\underset{\begin{smallmatrix} \text{ }\!\!|\!\!\text{ }\!\!|\!\!\text{ } \\ \text{O} \end{smallmatrix}}{\mathop{\text{C}}}\,-\text{C}{{\text{H}}_{\text{2}}}-\text{C}{{\text{H}}_{\text{2}}}}}\,-\text{C}{{\text{H}}_{\text{2}}}\text{COOH}$

• question_answer80) The number of octahedral void(s) per atom present in a cubic close-packed structure is

A)
1

B)
3

C)
2

D)
4

• question_answer81) In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with

A)
copper (I) sulphide $(C{{u}_{2}}S)$

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

C)
iron sulphide (FeS)

D)
carbon monoxide (CO)

• question_answer82) Identify the alloy containing a non-metal as a constituent in it.

A)
Invar

B)
Steel

C)
Bell metal

D)
Bronze

• question_answer83) A mixture of potassium chlorate, oxalic acid and sulphuric acid is heated. During the reaction which element undergoes maximum change in the oxidation number?

A)
S

B)
H

C)
Cl

D)
C

• question_answer84) Which one of the alkali metals, forms only, the normal oxide, ${{\text{M}}_{\text{2}}}\text{O}$ on heating in air?

A)
Rb

B)
K

C)
Li

D)
Na

• question_answer85) The ease of adsorption of the hydrated alkali metal ions on an ion-exchange resins follows the order

A)
$L{{i}^{+}}<{{K}^{+}}<N{{a}^{+}}<R{{b}^{+}}$

B)
$R{{b}^{+}}<{{K}^{+}}<N{{a}^{+}}<L{{i}^{+}}$

C)
${{K}^{+}}<N{{a}^{+}}<R{{b}^{+}}<L{{i}^{+}}$

D)
$N{{a}^{+}}<L{{i}^{+}}<{{K}^{+}}<R{{b}^{+}}$

• question_answer86) Which one of the following statements regarding photochemical smog is not correct?

A)
Carbon monoxide does not play any role in photochemical smog formation

B)
Photochemical smog is an oxidizing agent in character

C)
Photochemical smog is formed through photochemical reaction involving solar energy

D)
Photochemical smog does not cause irritation in eyes and throat

• question_answer87) $\text{C}{{\text{H}}_{\text{3}}}\text{CHO}$and ${{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}\text{C}{{\text{H}}_{\text{2}}}\text{CHO}$ can be distinguished chemically by

A)
Benedict test

B)
Iodofrom test

C)
Tollen's reagent test

D)
Fehling solution test

• question_answer88) Which of the statements is not true?

A)
On passing ${{\text{H}}_{\text{2}}}\text{S}$ through acidified ${{\text{k}}_{\text{2}}}\text{C}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{7}}}$ solution, a milky colour is observed

B)
$\text{N}{{\text{a}}_{\text{2}}}\text{C}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{7}}}$is preferred over ${{\text{K}}_{\text{2}}}\text{C}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{7}}}$ in volumetric analysis

C)
${{\text{K}}_{\text{2}}}\text{C}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{7}}}$ solution in acidic medium is orange

D)
${{\text{K}}_{\text{2}}}\text{C}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{7}}}$ solution becomes yellow on increasing the pH beyond 7

• question_answer89) Standard enthalpy of vaporisation${{\Delta }_{\text{vap}}}{{\text{H}}^{}}$for water at 100°C .is 40.66 kJ $\text{mo}{{\text{l}}^{\text{-1}}}$. The internal energy of vaporisation .of water at 100°C (in kJ $\text{mo}{{\text{l}}^{\text{-1}}}$is (Assume water vapour to behave like an ideal gas).

A)
+ 37.56

B)
- 43.76

C)
+ 43.76

D)
+ 40.66

• question_answer90) Identify the wrong statement in the following.

A)
Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius

B)
Amongst isoelectronic species, greater the negative charge on the anion, larger is the ionic radius

C)
Atomic radius of the elements increases as one moves down the first group of the Periodic Table

D)
Atomic radius of the elements decreases as one moves across from left to right in the 2nd period of the Periodic Table

• question_answer91) Which of the following statements is not valid for oxoacids of phosphorus?

A)
Orthophosphoric acid is used in the manufacture of triple superphosphate

B)
Hypophosphorous acid is a diprotic acid

C)
All oxoacids contain tetrahedral four coordinated phosphorus

D)
All oxoacids contain at least one P=0 unit and one P?OH group

• question_answer92) The protecting power of lyophilic colloidal sol is expressed in terms of

A)
coagulation value

B)
gold number

C)
critical micelle concentration

D)
oxidation number

• question_answer93) Sulphur trioxide can be obtained by which of the following reaction

A)
$\text{CaS}{{\text{O}}_{\text{4}}}\text{+}\,\text{C}\xrightarrow[{}]{\Delta }$

B)
$\text{F}{{\text{e}}_{\text{2}}}{{\text{(S}{{\text{O}}_{\text{4}}}\text{)}}_{\text{3}}}\xrightarrow[{}]{}$

C)
$\text{S}\,\text{+}\,{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\xrightarrow[{}]{}$

D)
$\,{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}+\text{PC}{{\text{l}}_{\text{5}}}\xrightarrow[{}]{}$

• question_answer94) ${{\text{p}}_{\text{A}}}$and ${{\text{p}}_{\text{B}}}$are the vapour pressure of pure liquid components, A and B, respectively of an ideal binary solution. If ${{\text{x}}_{\text{A}}}$ represents the mole fraction of component A, the total pressure of the solution will be

A)
${{p}_{A}}+{{x}_{A}}({{p}_{B}}-{{p}_{A}})$

B)
${{p}_{A}}+{{x}_{A}}({{p}_{A}}-{{p}_{B}})$

C)
${{p}_{B}}+{{x}_{A}}({{p}_{B}}-{{p}_{A}})$

D)
${{p}_{B}}+{{x}_{A}}({{p}_{A}}-{{p}_{B}})$

• question_answer95) Which of the following acids does not exhibit optical isomerism?

A)
Maleic acid

B)
$\text{-}$amino acids

C)
Lactic acid

D)
Tartaric acid

• question_answer96) Which of the following species contains three bond pairs and one lone pair around the central atom?

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

B)
$\text{B}{{\text{F}}_{3}}$

C)
$\text{NH}_{2}^{-}$

D)
$\text{PC}{{\text{l}}_{\text{3}}}$

• question_answer97) Limiting molar conductivity of $\text{N}{{\text{H}}_{\text{4}}}\text{OH}$ $(i.e.,\,\Delta {{m}_{(N{{H}_{4}}Cl)}})$is equal to

A)
$\Delta m(N{{H}_{4}}Cl)+\overset{o}{\mathop{\Delta }}\,m(NaCl)-\overset{o}{\mathop{\Delta }}\,m(NaOH)$

B)
$\overset{o}{\mathop{\Delta }}\,m(NaOH)+\overset{o}{\mathop{\Delta }}\,m(NaCl)-\overset{o}{\mathop{\Delta }}\,m(N{{H}_{4}}Cl)$

C)
$\overset{o}{\mathop{\Delta }}\,m(N{{H}_{4}}OH)+\overset{o}{\mathop{\Delta }}\,m(N{{H}_{4}}Cl)-\overset{o}{\mathop{\Delta }}\,m(HCl)$

D)
$\overset{o}{\mathop{\Delta }}\,m(N{{H}_{4}}OH)+\overset{o}{\mathop{\Delta }}\,m(NaOH)-\overset{o}{\mathop{\Delta }}\,m(NaCl)$

• question_answer98) The pair of species with the same bond order is

A)
$O_{2}^{2-},{{B}_{2}}$

B)
$O_{2}^{+},N{{O}^{+}}$

C)
$NO,CO$

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

• question_answer99) Which of the following statements is false?

A)
Artificial silk is derived from cellulose

B)
Nylon-66 is an example of elastomer

C)
The repeat unit in natural rubber is isoprene

D)
Both starch and cellulose are polymers of glucose

• question_answer100) In the following reaction, $\underset{\underset{\text{Major}\,\text{product}}{\mathop{\text{A}}}\,\text{+}\underset{\text{Minor}\,\text{product}}{\mathop{\text{B}}}\,}{\mathop{{{\text{H}}_{\text{3}}}\text{C}-\underset{\begin{smallmatrix} \text{ }\!\!|\!\!\text{ } \\ \text{C}{{\text{H}}_{\text{3}}} \end{smallmatrix}}{\overset{\begin{smallmatrix} \text{C}{{\text{H}}_{\text{3}}} \\ \text{ }\!\!|\!\!\text{ } \end{smallmatrix}}{\mathop{\text{C}}}}\,-\text{CH}\,\text{=}\,\text{C}{{\text{H}}_{\text{2}}}\xrightarrow[{}]{{{\text{H}}_{\text{2}}}\text{O/}{{\text{H}}^{\text{{ }\!\!\mathrm{\AA}\!\!\text{ }}}}}}}\,$

A)
${{\text{H}}_{\text{3}}}\text{C}-\underset{\begin{smallmatrix} | \\ \text{OH} \end{smallmatrix}}{\overset{\begin{smallmatrix} \text{C}{{\text{H}}_{\text{3}}} \\ | \end{smallmatrix}}{\mathop{\text{C}-}}}\,\underset{\begin{smallmatrix} \text{ }\!\!|\!\!\text{ } \\ \text{C}{{\text{H}}_{\text{3}}} \end{smallmatrix}}{\mathop{\text{CH}}}\,-\text{C}{{\text{H}}_{\text{3}}}$

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

C)
${{\text{H}}_{\text{3}}}\text{C}-\underset{\begin{smallmatrix} | \\ \text{C}{{\text{H}}_{\text{3}}} \end{smallmatrix}}{\overset{\begin{smallmatrix} \text{C}{{\text{H}}_{\text{3}}} \\ | \end{smallmatrix}}{\mathop{\text{C}-}}}\,\underset{\begin{smallmatrix} \text{ }\!\!|\!\!\text{ } \\ \text{OH} \end{smallmatrix}}{\mathop{\text{CH}}}\,-\text{C}{{\text{H}}_{\text{3}}}$

D)
${{\text{H}}_{\text{3}}}\text{C}-\underset{\begin{smallmatrix} | \\ \text{C}{{\text{H}}_{\text{3}}} \end{smallmatrix}}{\overset{\begin{smallmatrix} \text{C}{{\text{H}}_{\text{3}}} \\ | \end{smallmatrix}}{\mathop{\text{C}-}}}\,\text{C}{{\text{H}}_{2}}-\underset{\begin{smallmatrix} \text{ }\!\!|\!\!\text{ } \\ \text{OH} \end{smallmatrix}}{\mathop{\text{C}{{\text{H}}_{\text{2}}}}}\,$

• question_answer101) Motile zygote of Plasmodium occurs in

A)
gut of female Anopheles

B)
salivary glands of Anopheles

C)
human RBCs

D)
human liver

• question_answer102) The human hindbrain comprises three parts, one of which is

A)
spinal cord

B)
corpus callosum

C)
cerebellum

D)
hypothalamus

• question_answer103) Which part of the human ear plays no role in hearing as such but is otherwise very much required?

A)
Eustachian tube

B)
Organ of Corti

C)
Vestibular apparatus

D)
Ear ossicles

• question_answer104) The most abundant prokaryotes helpful to human in making curd from milk and in production of antibiotics are the ones categorized as

A)
cyanobacteria

B)
archaebacteria

C)
chemosynthetic autotrophs

D)
heterotrophic bacteria

• question_answer105) Which one of the following statements is false in respect of viability of mammalian sperm?

A)
Sperm is viable for only up to 24 h

B)
Survival of sperm depends on the pH of the medium and is more active in alkaline medium

C)
Viability of sperm is determined by its motility

D)
Sperms must be concentrated in a thick suspension

• question_answer106) Evolution of different species in a given area starting from a point and spreading to other geographical areas is known as

A)

B)
natural selection

C)
migration

D)
divergent evolution

• question_answer107) What is the figure given below showing in particular?

A)
Ovarian cancer

B)
Uterine cancer

C)
Tubectomy

D)
Vasectomy

• question_answer108) In an area where DDT had been used extensively, the population of birds declined significantly because

A)
birds stopped laying eggs

B)
earthworms in the area got eradicated

C)
cobras were feeding exclusively on birds

D)
many of the birds eggs laid, did not hatch

• question_answer109) The figure below is the diagrammatic representation of the E. coli vector pBR 322. Which one of the given options correctly identifies its certain components (s)?

A)
On-original restriction enzyme

B)
rop-reduced osmotic pressure

C)
Hind III, Eco RI-selectable markers

D)
$\text{am}{{\text{p}}^{\text{R}}}\text{,te}{{\text{t}}^{\text{R}}}\text{-}$antibiotic resistance genes

• question_answer110) The common bottle cork is a product of

A)
dennatogen

B)
phellogen

C)
xylem

D)
vascular cambium

• question_answer111) Widal test is carried out to test

A)
malaria

B)
diabetes mellitus

C)
HIV/AIDS

D)
typhoid fever

• question_answer112) Which part would be most suitable for raising virus-free plants for micro propagation?

A)
Bark

B)
Vascular tissue

C)
Meristem

D)
Node

• question_answer113) Which one of the following is a wrong statement?

A)
Most of the forests have been lost in tropical areas

B)
Ozone in upper part of atmosphere is harmful to animals

C)
Greenhouse effect is a natural phenomenon

D)
Eutrophication is a natural phenomenon in freshwater bodies

• question_answer114) Companion cells are closely associated with

A)
sieve elements

B)
vessel elements

C)
trichomes

D)
guard cells

• question_answer115) Common cold differs from pneumonia in, that

A)
pneumonia is a communicable disease, whereas the common cold is a nutritional deficiency disease.

B)
pneumonia can be prevented by a live attenuated bacterial vaccine, whereas the common cold has no effective vaccine

C)
pneumonia is caused by a virus, while the common cold is caused by the bacterium Haemophilus in fluenzae.

D)
pneumonia pathogen, infects alveoli whereas the common cold affects nose and respiratory passage but not the lungs

• question_answer116) Pheretima and its close relatives derive nourishment from

A)
sugarcane roots

B)
decaying fallen leaves and soil organic matter

C)
soil insects

D)
small pieces of fresh fallen leaves of maize

• question_answer117) Removal of RNA polymerase III from nucleoplasm will affect the synthesis of

A)
tRNA

B)
hnRNA

C)
mRNA

D)
rRNA

• question_answer118) A process that makes important difference between ${{C}_{3}}$ and ${{C}_{4}}$plants is

A)
transpiration

B)
glycolysis

C)
photosynthesis

D)
photorespiration

• question_answer119) PCR and Restriction Fragment Length Polymorphism are the methods for

A)
study of enzymes

B)
genetic transformation

C)
DNA sequencing

D)
genetic fingerprinting

• question_answer120) Best defined function of manganese in green plants is

A)
photolysis of water

B)
Calvin cycle

C)
nitrogen fixation

D)
water absorption

• question_answer121) Measuring Biochemical Oxygen Demand (BOD) is a method used for

A)
estimating the amount of organic matter in sewage water

B)
working out the efficiency of oil driven automobile engines

C)
measuring the activity of Saccharomyces cerevisae in producing curd on a commercial scale

D)
working out the efficiency of RBCs about their capacity to carry oxygen

• question_answer122) Which one of the following is not a part of a transcription unit in DNA?

A)
The inducer

B)
A terminator

C)
A promoter

D)
The structural gene

• question_answer123) A certain road accident patient with unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor?

A)
Blood group B

B)
Blood group AB

C)
Blood group O

D)
Blood group A

• question_answer124) Consumption of which one of the following foods can prevent the kind of blindness associated with vitamin-A deficiency?

A)
Flavor savr tomato

B)
Canolla

C)
Golden rice

D)
Bt-brinjal

• question_answer125) The maximum amount of electrolytes and water (70-80%) from the glomerular filtrate is reabsorbed in which part of the nephron?

A)
Ascending limb of loop of Henie

B)
Distal convoluted tubule

C)
Proximal convoluted tubule

D)
Descending limb of loop of Heni

• question_answer126) Both, autogamy and geitonogamy are prevented in

A)
papaya

B)
cucumber

C)
castor

D)
maize

• question_answer127) Placentation in tomato and lemon is

A)
parietal

B)
free central

C)
marginal

D)
axile

• question_answer128) A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the following is likely to happen in his neurohormonal control system?

A)
Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal medulla

B)
Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse

C)
Hypothalamus activates the parasympathetic division of brain

D)
Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal cortex

• question_answer129) Which one of the following is not a gaseous biogeochemical cycle in ecosystem?

A)
Sulphur cycle

B)
Phosphorus cycle

C)
Nitrogen cycle

D)
Carbon cycle

• question_answer130) A single strand of nucleic acid tagged with a radioactive molecule is called

A)
vector

B)
selectable marker

C)
plasmid

D)
probe

• question_answer131) Which one of the following options gives one correct example each of convergent evolution and divergent evolution?

A)
Convergent evolution                                                                   Divergent evolution Eyes of Octopus and mammals                                                  Bones of forelimbs of vertebrates

B)
Thorns of Bougainvillia and tendrils of Cucurbits                 Wings of butterflies and birds

C)
Bones of forelimbs of vertebrates                                           Wings of butterfly and birds

D)
Thorns of Bougainvillia and tendrils of Cucurbita                                Eyes of Octopus and mammals

• question_answer132) An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is

A)
cuticle

B)
sporopollenin

C)
lignin

D)
cellulose

A)
seeds

B)
motile sperms

C)
cambium

D)
vessels

• question_answer134) What was the most significant trend in the evolution of modem man (Homo sapiens) from his ancestors?

A)
Shortening of jaws

B)
Binocular vision

C)
Increasing cranial capacity

D)
Upright posture

• question_answer135) Cymose inflorescence is present in

A)
Solanum

B)
Sesbania

C)
Trifolium

D)
Brassica

• question_answer136) Ribosomal RNA is actively synthesized in

A)
lysosoines

B)
nucleolus

C)
nucleoplasm

D)
ribosomes

• question_answer137) During gamete formation, the enzyme recombinase participates during

A)
metaphase-I

B)
anaphase-II

C)
prophase-I

D)
prophase-II

• question_answer138) Identify the possible link A in the following food chain Green plant$\to$ Insect$\to$Frog $\to$A$\to$Eagle

A)
rabbit

B)
wolf

C)
cobra

D)
parrot

• question_answer139) Phyllode is present in

A)
Asparagus

B)
Euphorbia

C)
Australian Acacia

D)
Opuntia

• question_answer140) Given below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels?

A)
Level PC is insects and level SC is small insectivorous birds

B)
Level PP is phytoplanktons in sea and Whale on top level-TC

C)
Level one PP is pipal trees and the level SC is sheep

D)
Level PC is rats and level SC is cats

• question_answer141) Monoscus purpureus is a yeast used commercially in the production of

A)
ethanol

B)
streptokinase for removing clots from the blood vessels

C)
citric acid

D)
blood cholesterol lowering statins

• question_answer142) The correct sequence of cell organelles during photorespiration is

A)
chloroplast-Golgi bodies-mitochondria

B)
chloroplast-rough endoplasmic reticulum-dictyosomes

C)
chloroplast-mitochondria-peroxisome

D)
chloroplast-vacuole-peroxisome

• question_answer143) Which one of the following is correctly matched?

A)
Passive transport of nutrients ? ATP

B)
Apoplast ? Plasmodesmata

C)

D)
Bakane of rice seedlings - F Skoog

• question_answer144) A normal-visioned man whose father was colour blind, marries a woman whose father was also colourblind. They have their first child as a daughter. What are the chances that this child would be colourblind?

A)
100%

B)
0%

C)
25%

D)
50%

• question_answer145) Signals for parturition originate from

A)
both placenta as well as fully developed foetus

B)
oxytocin released from maternal pituitary

C)
placenta only

D)
fully developed foetus only

• question_answer146) A patient brought to a hospital with myocardial infarction is normally immediately given

A)
penicillin

B)
streptokinase

C)
cyclosporin-A

D)
statins

• question_answer147) Which one of the following is not a property of cancerous cells, whereas the remaining three are?

A)
They compete with normal cells for vital nutrients

B)
They do not remain confined in the area of formation

C)
They divide in an uncontrolled manner

D)
They show contact inhibition

• question_answer148) The gynoecium consists of many free pistils in flowers of

A)
Aloe

B)
tomato

C)
Papaver

D)
Michelia

• question_answer149) Which one of the following is not a functional unit of an ecosystem?

A)
Energy flow

B)
Decomposition

C)
Productivity

D)
Stratification

• question_answer150) In a normal pregnant woman, the amount of total gonadotropin activity was assessed. The  result expected was

A)
High level of circulating FSH and LH in the uterus to stimulate implantation of the embryo

B)
High level of circulating HCG to stimulate endometrial thickening

C)
High levels of FSH and LH in uterus to stimulate endometrial thickening

D)
High level of circulating HCG to stimulate oestrogen and progesterone synthesis

• question_answer151) Which one of the following areas in India, is a hot spot of biodiversity?

A)
Eastern Ghats

B)
Gangetic plain

C)
Sunderbans

D)
Western Ghats

• question_answer152) Which one of the following is a correct statements?

A)
Pteridophyte gametophyte has a protonemal and leafy stage

B)
In gymnosperms female gametophyte is free-living

C)
Antheridiophores and archegoniophores are present in pteridophytes

D)
Origin of seed habit can be traced in pteridophytes

• question_answer153) Which one of the following does not differ in E.coli and Chlamydomonas?

A)
Ribosomes

B)
Chromosomal organization

C)
Cell wall

D)
Cell membrane

• question_answer154) The cyanobacteria are also referred to as

A)
protists

B)
golden algae

C)
slime moulds

D)
blue-green algae

• question_answer155) The test-tube baby programme employs which one of the following techniques?

A)
Intra Cytoplasmic Sperm Injection (ICSI)

B)
Intra Uterine Insemination CIUI)

C)

D)
Zygote Intra Fallopian Transfer (ZIFT)

• question_answer156) Which one of the following is a case of wrong matching?

A)
Somatic hybridization - Fusion of two diverse cells

B)
Vector DNA - Site for rRNA synthesis

C)
Micro propagation - In vitro production of plants in large numbers

D)
Callus - Unorganized mass of cells produced in tissue culture

• question_answer157) The highest number of species in the world is represented by

A)
fungi

B)
mosses

C)
algae

D)
lichens

• question_answer158) In which one of the following options the two examples are correctly matched with their particular type of immunity?

A)
Examples                                                                                            Type of immunity Polymorph nuclear leukocytes and monocyes                    Cellular barriers

B)
Anti-tetanus and anti-snake bite injections                          Active immunity

C)
Saliva in mouth and tears in eyes                                              Physical barriers

D)
Mucus coating of epithelium lining the                                   Physiological bariers primogenital tract and the HCl in stomach

• question_answer159) Which one of the following is wrong statement?

A)
Anabaena and Nostoc are capable of fixing nitrogen in free-living state also

B)
Root nodule forming nitrogen fixers live as aerobes under free-living conditions

C)
Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins

D)
Nitrosomonas   and   Nitrobacter   are chemoautotrophs

• question_answer160) Anxiety and eating spicy food together in an otherwise normal human, may lead to

A)
indigestion

B)
jaundice

C)
diarrhoea

D)
vomiting

• question_answer161) The Leydig cells as found in the human body are the secretory source of

A)
progesterone

B)
intestinal mucus

C)
glucagon

D)
androgens

• question_answer162) Compared to those of humans, the erythrocytes in frog are

A)
without nucleus but with haemoglobin

B)
nucleated and with haemoglobin

C)
very much smaller and fewer

D)
nucleated and without haemoglobin

• question_answer163) In which one of the following, the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct?

A)
Genus Name                     Two characters                                 Phylum                 Pila                                         (i) Body segmented                        Mollusca                                                                 (ii) Mouth with Radula

B)
Asterias                                                (i) Spiny skinned                               Echinodermata (ii) Water vascular system

C)
Sycon                                    (i) Pore bearing                                 Porifera (ii) Canal system

D)
Periplaneta                         (i) Jointed appendages                  Arthropoda (ii) Chitinous exoskeleton

A)
The prokaryotic ribosomes are 80 S, where S stands for sedimentation coefficient

B)
These are composed of ribonucleic acid and proteins

C)
These are found only in eukaryotic cells

D)
These are self-splicing introns of some RNAs

• question_answer165) Cirrhosis of liver is caused by the chronic intake of

A)
opium

B)
alcohol

C)
tobacco (chewing)

D)
cocaine

• question_answer166) Which one is a true statement regarding DNA polymerase used in PCR?

A)
It is used to ligate introduced DNA in recipient cells

B)
It serves as a selectable marker

C)
It is isolated from a virus

D)
It remains active at high temperature

• question_answer167) Which statement is wrong for viruses?

A)
All are parasites

B)
All of them have helical symmetry

C)
They have ability to synthesize nucleic acids and proteins

D)
Antibiotics have no effect on them

• question_answer168) Which one of the following is correctly matched?

A)
Onion                                    -Bulb

B)
Ginger                                  -Sucker

C)
Chlamydomonas              - Conidia

D)
Yeast                                     - Zoospores

• question_answer169) How many plants in the list given below have composite fruits that develop from an inflorescence? Walnut, poppy, radish, fig, pineapple, apple, tomato, mulberry

A)
Four

B)
Five

C)
Two

D)
Three

• question_answer170) Given below is the diagrammatic representation of one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown and the one blank component X in it

A)
Cholesterol                         Guanin

B)
Amino acid                          $\text{N}{{\text{H}}_{\text{2}}}$

C)

D)
Nucleoside                         Uracil

• question_answer171) Which one of the following microbes forms symbiotic association with plants and helps them in their nutrition?

A)
Azotobacter

B)
Aspergillus

C)
Glomus

D)
Trichoderma

• question_answer172) The extinct human who lived 100000 to 40000 years ago, in Europe, Asia and parts of Africa, with short stature, heavy eye brows, retreating fore heads, large jaws with heavy teeth, stocky bodies, a lumbering gait and stooped posture was

A)
Homo habilis

B)
Neanderthal human

C)
Cro-magnon humans

D)
Ramapithecus

• question_answer173) If one strand of DNA has the nitrogenous base sequence as ATCTG, what would be the complementary RNA strand sequence?

A)
TTAGU

B)
UAGAC

C)
AACTG

D)
ATCGU

• question_answer174) Which one of the following pairs of hormones are the examples of those that can easily pass through the cell membrane of the target cell and bind to a receptor inside it (mostly in the nucleus)?

A)
Insulin and glucagon

B)
Thyroxin and insulin

C)
Somatostatin and oxytocin

D)
Cortisol and testosterone

• question_answer175) Nuclear membrane is absent in

A)
Penicillium

B)
Agaricus

C)
Volvox

D)
Nostoc

• question_answer176) Which one is the most abundant protein in the animal world?

A)
Trypsin

B)
Haemoglobin

C)
Collagen

D)
Insulin

• question_answer177) Which one of the following is common to multicellular fungi, filamentous algae and protonema of mosses?

A)
Diplontic life cycle

B)
Members of kingdom-Plantae

C)
Mode of nutrition

D)
Multiplication by fragmentation

• question_answer178) Which one single organism or the pair of organisms is correctly assigned to its or their named taxonomic group?

A)
Paramecium and Plasmodium belong to the same kingdom as that of Penicillium

B)
Lichen is a composite organism formed from the symbiotic association of an algae and a protozoan

C)
Yeast used in making bread and beer is a fungus

D)
Nostoc and Andbaena are examples of Protista

• question_answer179) Even in absence of pollinating agents seed-setting is assured in

A)
Commellina

B)
Zostera

C)
Salvia

D)
fig

• question_answer180) Yeast is used in the production of

A)

B)
lipase and pectinase

C)

D)
cheese and butter

• question_answer181) Which one out of A-D given below correctly represents the structural formula of the basic amino acid?  A B C D

A)
C

B)
D

C)
A

D)
B

• question_answer182) The upright pyramid of number is absent in

A)
pond

B)
forest

C)
lake

D)
grassland

• question_answer183) What is correct to say about the hormone action in humans?

A)
Glucagon is secreted by p-cells of islets of Langerhans and stimulates glycogenolysis

B)
Secretion of thymosine is stimulated with ageing

C)
In females, FSH first binds with specific receptors on ovarian cell membrane

D)
PSH stimulates the secretion of oestrogen and progesterone

• question_answer184) Closed vascular bundles lack

A)
ground tissue

B)
conjunctive tissue

C)
cambium

D)
pith

• question_answer185) Which one of the following is the correct statement for respiration in humans?

A)
Cigarette smoking may lead to inflammation of bronchi

B)
Neural signals from pneumotoxic centre in pons region of brain can increase the duration of inspiration

C)
Workers in grinding and stone breaking industries may suffer, from lung fibrosis

D)
About 90% of carbon dioxide $\text{(C}{{\text{O}}_{\text{2}}}\text{)}$is carried by haemoglobin as carbamino haemoglobin

• question_answer186) Removal of introns and joining of exons in a defined order during transcription is called

A)
looping

B)
inducing

C)
slicing

D)
splicing

• question_answer187) ${{\text{F}}_{\text{2}}}$generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1 : 2 : 1. It represents a case of

A)
codominance

B)
dihybrid cross

C)
monohybrid cross with complete dominance

D)
monohybrid cross with incomplete dominance

• question_answer188) Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage?

A)
Prophase-I during meiosis

B)
Prophase-II during meiosis

C)
Prophase of mitosis

D)
Both prophase and metaphase of mitosis.

• question_answer189) People who have migrated from the planes to an area adjoining Rohtang Pass about six months back

A)
have more RBCs and their haemoglobin has a lower binding affinity to ${{O}_{2}}$

B)
are not physically fit to play games like football

C)
suffer from altitude sickness with symptoms like nausea, fatigue, etc.

D)
have the usual RBC count but their haemoglobin has very high binding affinity to${{O}_{2}}$

• question_answer190) For transformation, microparticles coated with DNA to be bombarded with gene gun are made up of

A)
silver or platinum

B)
platinum or zinc

C)
silicon or platinum

D)
gold or tungsten

• question_answer191) A nitrogen fixing microbe associated with Azolla in rice fields is

A)
Spirulina

B)
Andbaena

C)
Frankia

D)
Tolypothrix

• question_answer192) Select the correct statement regarding the specific disorder of muscular or skeletal system.

A)
Muscular dystrophy - age related shortening of muscles

B)
Osteoporosis - decrease in bone mass and higher chances of fractures with advancing age

C)
Myasthenia gravis - auto immune disorder which inhibits sliding of myosin filaments

D)
Gout - inflammation of joints due to extra deposition of calcium

• question_answer193) Water containing cavities in vascular bundles are found in

A)
sunflower

B)
maize

C)
Cycas

D)
Pinus

• question_answer194) Select the correct statement from the following regarding cell membrane.

A)
$N{{a}^{+}}$ and ${{K}^{+}}$ions move across cell membrane by passive transport

B)
Proteins make up 60 to 70% of the cell membrane

C)
Lipids are arranged in a bilayer with polar heads towards the inner part

D)
Fluid mosaic model of cell membrane was proposed by Singer and Nicolson

• question_answer195) Gymnosperms are also called, soft wood spermatophytes-because they lack

A)
cambium

B)
phloem fibres

C)
thick-walled tracheids

D)
xylem fibres

• question_answer196) The coconut water and the edible part of coconut are equivalent to

A)
endosperm

B)
endocarp

C)
mesocarp

D)
embryo

• question_answer197) Vexillary aestivation is characteristic of the family

A)
Fabaceae

B)
Asteraceae

C)
Solanaceae

D)
Brassicaceae

• question_answer198) Which one of the following is an example of carrying out biological control of pests/diseases using microbes?

A)
Trichoderma sp. against certain plant pathogens

B)
Nucleopolyhedrovirus against white rust in Brassica

C)
Bt-cotton to increase cotton yield

D)
Lady bird beetle against aphids in mustard

• question_answer199) Select the correct statement from the ones given below with respect to Periplaneta americana.

A)
Nervous system located dorsally, consists of segmentally arranged ganglia joined by a pair of longitudinal connectives

B)
Males bear a pair of short thread like anal styles

C)
There are 16 very long Malpighian tubules present at the junctions of midgut and hindgut

D)
Grinding of food is carried out only by the mouth parts

• question_answer200) Maximum nutritional diversity is found in the group

A)
Fungi

B)
Animalia

C)
Monera

D)
Plantae