# Solved papers for NEET AIPMT SOLVED PAPER SCREENING 2010

### done AIPMT SOLVED PAPER SCREENING 2010 Total Questions - 200

• question_answer1) A block of mass m is in contact with the cart C as shown in the figure. The coefficient of static friction between the block and the cart is $\mu$. The acceleration a of the cart that will prevent the block from falling satisfies

A)
$\alpha >\frac{mg}{\mu }$

B)
$\alpha >\frac{g}{\mu m}$

C)
$\alpha \ge \frac{g}{\mu }$

D)
$\alpha <\frac{g}{\mu }$

• question_answer2) The mass of a $_{\text{3}}^{\text{7}}$ Li nucleus is 0.042u less than the sum of the masses of all its nucleons. The binding energy per nucleon of $_{\text{3}}^{\text{7}}$Li nucleus is nearly

A)
46 MeV

B)
5.6 MeV

C)
3.9 MeV

D)
23 MeV

• question_answer3) A circular disk of moment of inertia ${{\text{I}}_{\text{t}}}$ is rotating in a horizontal plane, about its symmetry axis, with a constant angular speed ${{\omega }_{\text{t}}}.$Another disk of moment of inertia ${{\text{I}}_{\text{b}}}$is dropped coaxially onto the rotating disk. Initially the second disk has zero angular speed. Eventually both the disks rotate with a constant angular speed ${{\omega }_{f}}.$The energy lost by the initially rotating disc due to friction is

A)
$\frac{1}{2}\frac{I_{b}^{2}}{({{I}_{t}}+{{I}_{b}})}\omega _{i}^{2}$

B)
$\frac{1}{2}\frac{I_{t}^{2}}{({{I}_{t}}+{{I}_{b}})}\omega _{i}^{2}$

C)
$\frac{1}{2}\frac{{{I}_{b}}-{{I}_{t}}}{({{I}_{t}}+{{I}_{b}})}\omega _{i}^{2}$

D)
$\frac{1}{2}\frac{{{I}_{b}}{{I}_{t}}}{({{I}_{t}}+{{I}_{b}})}\omega _{i}^{2}$

• question_answer4) Which one of the following statement is false?

A)
Pure Si doped with trivalent impurities gives a p-type semiconductor

B)
Majority carriers in a n-type semiconductor are holes

C)
Minority carriers in a p-type semiconductor are electrons

D)
The resistance of intrinsic semiconductor decreases with increase of temperature

• question_answer5) The displacement of a particle along the x axis is given by $x=a{{\sin }^{2}}\omega t$. The motion of the particle corresponds to

A)
simple harmonic motion of frequency $\omega /\pi$

B)
simple harmonic motion of frequency$3\omega /2\pi$

C)
non simple harmonic motion

D)
simple harmonic motion of frequency $\omega /2\pi$

• question_answer6) The radii of circular orbits of two satellites A and B of the earth are 4R and R, respectively. If the speed of satellite A is 3v, then the speed of satellite B will be

A)
3v/4

B)
6v

C)
12 v

D)
3v/2

• question_answer7) A beam of cathode rays is subjected to crossed Electric (X) and Magnetic fields (B). The fields are adjusted such that the beam is not deflected. The specific charge of the cathode rays is given by (where V is the potential difference between cathod and anode)

A)
$\frac{{{B}^{2}}}{2V{{E}^{2}}}$

B)
$\frac{2V{{B}^{2}}}{{{E}^{2}}}$

C)
$\frac{2V{{E}^{2}}}{{{B}^{2}}}$

D)
$\frac{2{{E}^{2}}}{2V{{B}^{2}}}$

• question_answer8) A ball is dropped 'from a high rise platform at t = 0 starting from rest. After 6 s another ball is thrown downwards from the same platform with a speed v. The two balls meet at t = 18 s. What is the value of v ? (take $g=10\,m{{s}^{-2}}$)

A)
$\text{74}\,\text{m}{{\text{s}}^{-2}}$

B)
$55\,\text{m}{{\text{s}}^{-1}}$

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

D)
$60\,\text{m}{{\text{s}}^{-1}}$

• question_answer9) A ray of light travelling in a transparent medium of refractive index $\mu$ falls, on a surface separating the medium from air at an angle of incidence of 45°. For which of the following value of $\mu$ the ray can undergo total internal reflection?

A)
$\mu =1.33$

B)
$\mu =1.40$

C)
$\mu =1.50$

D)
$\mu =1.25$

• question_answer10) The period of oscillation of a mass M suspended from a spring of negligible mass is T. If along with it another mass M is also suspended, the period of oscillation will now be

A)
T

B)
$T/\sqrt{2}$

C)
2 T

D)
$\sqrt{2}T$

• question_answer11) A cylindrical metallic rod in thermal contact with two reservoirs of heat at its two ends conducts an amount of heat Q in time t. The metallic rod is melted and the material is formed into a rod of half the radius of the original rod. What is the amount of heat conducted by the new rod when placed in thermal contact with the two reservoirs in time t?

A)
Q/4

B)
Q/16

C)
2Q

D)
Q/2

• question_answer12) A ball moving with velocity $\text{2}\,\text{m}{{\text{s}}^{\text{-1}}}$collides head on with another stationary ball of double the mass. If the coefficient of restitution is 0.5, then their velocities (in$\,\text{m}{{\text{s}}^{\text{-1}}}$) after collision will be

A)
0, 1

B)
1, 1

C)
1, 0.5

D)
0, 2

• question_answer13) A transverse wave is represented by $y=A\sin$$(\omega t-kx).$ For what value of the wavelength is the wave velocity equal to the maximum particle velocity?

A)
$\pi A/2$

B)
$\pi A$

C)
$2\pi A$

D)
$A$

• question_answer14) A particle has initial velocity $(3\mathbf{\hat{i}}+4\mathbf{\hat{j}})$ and has acceleration $(0.1\mathbf{\hat{i}}+0.3\mathbf{\hat{j}})$. Its speed after 10 s is

A)
7 unit

B)
$7\sqrt{2}$ unit

C)
8.5 unit

D)
10 unit

• question_answer15) An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of $\text{2}\,\text{m}{{\text{s}}^{\text{-1}}}$. The mass per unit length of water in the pipe is 100$\,\text{kg}{{\text{m}}^{\text{-1}}}$. What is the power of the engine?

A)
400 W

B)
200 W

C)
100 W

D)
800 W

• question_answer16) A thin ring of radius R metre has charge q coulomb uniformly spread on it. The ring rotates about its axis with a constant frequency of f revolution/s. The value of magnetic induction in Wb $\,{{\text{m}}^{\text{-2}}}$ at the centre of the ring is

A)
$\frac{{{\mu }_{0}}qf}{2\pi R}$

B)
$\frac{{{\mu }_{0}}q}{2\pi f\,R}$

C)
$\frac{{{\mu }_{0}}\,q}{2f\,R}$

D)
$\frac{{{\mu }_{0}}\,q\,f}{2\,R}$

• question_answer17) Which one of the following bonds produces a solid that reflects light in the visible region and whose electrical conductivity decreases with temperature and has high melting point?

A)
metallic bonding

B)
van der Waals' bonding

C)
ionic bonding

D)
covalent bonding

• question_answer18) A particle moves a distance x in time t according to equation $x={{(t+5)}^{-1}}$. The acceleration of particle is proportional to

A)
(velocity)$^{3/2}$

B)
(distance)2

C)
(distance)$^{-2}$

D)
(velocity)$^{\text{2/3}}$

• question_answer19) A conducting circular loop is placed in a uniform magnetic field, B = 0.025 T with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of $\text{1}\,\text{m}{{\text{m}}^{\text{s-1}}}$. The induced emf when the radius is 2 cm, is

A)
$\text{2}\,\text{V}$

B)
$\,\text{V}$

C)
$\frac{\pi }{2}\,\text{V}$

D)
$\text{2}\,\text{V}$

• question_answer20) The activity of a radioactive sample is measured as ${{N}_{0}}$ counts per minute at t = 0 and ${{N}_{0}}/e$ counts per minute at t = 5 min. The time (in minute) at which the activity reduces to half its value is

A)
$\text{lo}{{\text{g}}_{\text{e}}}\text{2/5}$

B)
$\frac{\text{5}}{\text{lo}{{\text{g}}_{\text{e}}}\text{2}}$

C)
$5{{\log }_{10}}2$

D)
$5{{\log }_{e}}2$

• question_answer21) Two particles which are initially at rest, move towards each other under the action of their internal attraction. If their speeds are v and 2v at any instant, then the speed of centre of mass of the system will be

A)
2v

B)
0

C)
1.5v

D)
v

• question_answer22) A particle of mass M is situated at the centre of a spherical shell of same mass and radius a. The gravitational potential at a point situated at a/2 distance from the centre, will be

A)
$-\frac{3GM}{a}$

B)
$-\frac{2GM}{a}$

C)
$-\frac{GM}{a}$

D)
$-\frac{4GM}{a}$

• question_answer23) The device that can act as a complete electronic circuit is

A)
Junction diode

B)
Integrated circuit

C)
Junction transistor

D)
Zener diode

• question_answer24) A potentiometer circuit is set up as shown. The potential gradient across the potentiometer wire, is k volt/cm and the ammeter, present in the circuit, reads 1.0 A when two way key is switched off. The balance points, when the key between the terminals (i) 1 and 2 (ii) 1 and 3, is plugged in, are found to be at lengths ${{\text{l}}_{\text{1}}}\text{cm}$ and ${{\text{l}}_{2}}\text{cm}$ respectively. The magnitudes, of the resistors R and X, in ohm, are then, equal, respectively, to

A)
$\text{k(}{{\text{l}}_{\text{2}}}-{{\text{l}}_{\text{1}}}\text{)}\,\text{and}\,\text{k}{{\text{l}}_{\text{2}}}$

B)
$\text{k}{{\text{l}}_{\text{2}}}\,\text{and}\,\text{k}\,\text{(}{{\text{l}}_{\text{2}}}-{{\text{l}}_{\text{1}}})$

C)
$\text{k(}{{\text{l}}_{\text{2}}}-{{\text{l}}_{\text{1}}})\,\,\text{and}\,\text{k}\,{{\text{l}}_{\text{1}}}$

D)
$\text{k}{{\text{l}}_{\text{2}}}\,\text{and}\,\text{k}{{\text{l}}_{2}}$

• question_answer25) A tuning fork of frequency 512 Hz makes 4 beats/s with the vibrating string of a piano. The beat frequency decreases to 2 beats/s when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was

A)
510 Hz

B)
514-Hz

C)
516 Hz

D)
508 Hz

• question_answer26) Six vectors $\overset{\to }{\mathop{\mathbf{a}}}\,$ through $\overset{\to }{\mathop{\mathbf{f}}}\,$ have the magnitudes and directions indicated in the figure. Which of the following statements is true?

A)
$\overset{\to }{\mathop{\mathbf{b}}}\,\,+\overset{\to }{\mathop{\mathbf{c}}}\,=\overset{\to }{\mathop{\mathbf{f}}}\,$

B)
$\overset{\to }{\mathop{\mathbf{d}}}\,\,+\overset{\to }{\mathop{\mathbf{c}}}\,=\overset{\to }{\mathop{\mathbf{f}}}\,$

C)
$\overset{\to }{\mathop{\mathbf{d}}}\,\,+\overset{\to }{\mathop{\mathbf{e}}}\,=\overset{\to }{\mathop{\mathbf{f}}}\,$

D)
$\overset{\to }{\mathop{\mathbf{b}}}\,\,+\overset{\to }{\mathop{\mathbf{e}}}\,=\overset{\to }{\mathop{\mathbf{f}}}\,$

• question_answer27) A galvanometer has a coil of resistance 100$\Omega$  and gives a full scale deflection for 30 mA current. If it is to work as a voltmeter of 30 V range, the resistance required to be added will be

A)
900$\Omega$

B)
1800$\Omega$

C)
500$\Omega$

D)
1000$\Omega$

• question_answer28) A gramophone record is revolving with an angular velocity $\omega .$A coin is placed at a distance r from the centre of the record. The static coefficient of friction is $\mu$. The coin will revolve with the record if

A)
$r=\mu g{{\omega }^{2}}$

B)
$r<\frac{{{\omega }^{2}}}{\mu g}$

C)
$r\le \frac{\mu g}{{{\omega }^{2}}}$

D)
$r\ge \frac{\mu g}{{{\omega }^{2}}}$

• question_answer29) Which of the following statement is false for the properties of electromagnetic waves?

A)
Both electric and magnetic field vectors attain the maxima and minima at the same place and same time

B)
The energy in electromagnetic wave is divided equally between electric and magnetic vectors

C)
Both electric and magnetic field vectors are parallel to each other and perpendicular to the direction of propagation of wave

D)
These waves do not require any material medium for propagation

• question_answer30) The energy of a hydrogen atom in the ground state is - 13.6 eV. The energy of a $H{{e}^{+}}$ ion in the first excited state will be

A)
-13.6 eV

B)
-27.2 eV

C)
-54.4eV

D)
- 6.8 eV

• question_answer31) The dimension of $\frac{1}{2}{{\varepsilon }_{0}}{{E}^{2}},$ where ${{\varepsilon }_{0}}$ is permittivity of free space and E is electric field, is

A)
$\text{ }\!\![\!\!\text{ M}{{\text{L}}^{\text{2}}}{{\text{T}}^{\text{-2}}}\text{ }\!\!]\!\!\text{ }$

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

C)
$\text{ }\!\![\!\!\text{ M}{{\text{L}}^{\text{-2}}}{{\text{T}}^{\text{-1}}}\text{ }\!\!]\!\!\text{ }$

D)
$\text{ }\!\![\!\!\text{ ML}{{\text{T}}^{\text{-1}}}\text{ }\!\!]\!\!\text{ }$

• question_answer32) In producing chlorine by electrolysis 100 kW power at 125 V is being consumed. How much chlorine per minute is liberated (ECE of chlorine is $0.367\times {{10}^{-6}}kg{{C}^{-1}}$)

A)
$\text{1}\text{.76 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-3}}}\text{kg}$

B)
$\text{9}\text{.67 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-3}}}\text{kg}$

C)
$\text{17}\text{.61 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-3}}}\text{kg}$

D)
$\text{3}\text{.67 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-3}}}\text{kg}$

• question_answer33) A man of 50 kg mass is standing in a gravity free space at a height of 10m above the floor. He throws a stone of 0.5 kg mass downwards with a speed $\text{2m}{{\text{s}}^{\text{-1}}}$. When the stone reaches the floor, the distance of the man above the floor will be

A)
9.9 m

B)
10.1m

C)
10 m

D)
20 m

• question_answer34) An alpha nucleus of energy $\frac{\text{1}}{\text{2}}\text{m}{{\text{v}}^{\text{2}}}$ bombards a heavy nuclear target of charge $Ze$. Then the distance of closest approach for the alpha nucleus will be proportional to

A)
$\frac{\text{1}}{Ze}$

B)
${{\text{v}}^{\text{2}}}$

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

D)
$\frac{\text{1}}{{{\text{v}}^{\text{4}}}}$

• question_answer35) A lens having focal length $f$ and aperture of diameter d forms an image of intensity $I$. Aperture of diameter $\frac{d}{2}$ in central region of lens is covered by a black paper. Focal length of lens and intensity of image now will be respectively

A)
$f\,\text{and}\frac{1}{4}$

B)
$\frac{3f}{4}\text{and}\frac{I}{2}$

C)
$f\,\text{and}\,\frac{3I}{4}$

D)
$\,\frac{f}{2}\,\text{and}\,\frac{I}{2}$

• question_answer36) If $\text{U}$ and $\Delta W$ represent the increase in internal energy and work done by the system respectively in a thermodynamically process, which of the following is true?

A)
$\text{U=}-\text{W,}$in a adiabatic process

B)
$\text{U=}\text{W,}$in a isothermal process

C)
$\text{U=}\text{W,}$ in a adiabatic process

D)
$\text{U=}-\text{W,}$in a isothermal process

• question_answer37) The total radiant energy per unit area, normal to the direction of incidence, received at a distance R from the centre of a star of radius r, whose outer surface radiates as a black body at a temperature T K is given by (where $\sigma$ is Stefan's constant)

A)
$\sigma {{r}^{2}}{{T}^{4}}/{{R}^{2}}$

B)
$\sigma {{r}^{2}}{{T}^{4}}/4\pi {{r}^{2}}$

C)
$\sigma {{r}^{4}}{{T}^{4}}/{{r}^{4}}$

D)
$4\pi \,\sigma {{r}^{4}}{{T}^{4}}/{{R}^{2}}$

• question_answer38) In the given circuit the reading of voltmeter ${{\text{V}}_{1}}$and ${{\text{V}}_{\text{2}}}$ are 300 V each. The reading to the voltmeter ${{\text{V}}_{3}}$ and ammeter A are respectively

A)
150 V, 2.2 A

B)
220 V, 2.2 A

C)
220 V, 2.0 A

D)
100 V, 2.0 A

• question_answer39) A 220 V input is supplied to a transformer. The output circuit draws a current of 2.0 A at 440 V. If the efficiency of the transformer is 80%, the current drawn by the primary windings of the transformer is

A)
3.6 A

B)
2.8 A

C)
2.5 A

D)
5.0 A

• question_answer40) A source${{\text{S}}_{\text{1}}}$is producing, ${{10}^{15}}$ photons/s of wavelength $5000\overset{\text{o}}{\mathop{\text{A}}}\,$. Another source ${{\text{S}}_{\text{2}}}$ is producing$1.02\times {{10}^{15}}$ photons per second of wavelength $5100\overset{\text{o}}{\mathop{\text{A}}}\,$. Then, (power of ${{\text{S}}_{\text{2}}})/$(power of ${{\text{S}}_{1}})$ is equal to

A)
1.00

B)
1.02

C)
1.04

D)
0.98

• question_answer41) A common emitter amplifier has a voltage gain of 50, an input impedance of 100$\Omega$ and an output impedance of 200$\Omega$.The power gain the amplifier is

A)
500

B)
1000

C)
1250

D)
50

• question_answer42) A vibration magnetometer placed in magnetic meridian has a small bar magnet. The magnet executes oscillations with a time period of 2 s in earth's horizontal magnetic field of 24 $\text{T}\text{.}$When a horizontal field of $\text{18 }\text{T}$is produced opposite to the earth's field by placing a current carrying wire, the new time period of magnet will be

A)
1s

B)
2s

C)
3s

D)
4s

• question_answer43) Two positive ions, each carrying a charge q, are separated by a distance d. If F is the force of repulsion between the ions, the number of electrons missing from each ion will be (e being the charge on an electron)

A)
$\frac{4\pi {{\varepsilon }_{0}}F{{d}^{2}}}{{{e}^{2}}}$

B)
$\sqrt{\frac{4\pi {{\varepsilon }_{0}}F{{e}^{2}}}{{{d}^{2}}}}$

C)
$\sqrt{\frac{4\pi {{\varepsilon }_{0}}F{{d}^{2}}}{{{e}^{2}}}}$

D)
$\frac{4\pi {{\varepsilon }_{0}}F{{d}^{2}}}{{{q}^{2}}}$

• question_answer44) The potential difference that must be applied to stop the fastest photoelectrons emitted by a nickel surface, having work function 5.01 eV, when ultraviolet light of 200nm falls on it, must be

A)
2.4 V

B)
-1.2 V

C)
2.4 V

D)
1.2 V

• question_answer45) A square surface of side L metre in the plane of the paper is placed in a uniform electric field E (volt/m) acting along the same place at an angle $\theta$ with the horizontal side of the square as shown in figure. The electric flux linked to the surface in unit of V-m, is

A)
$\text{E}{{\text{L}}^{\text{2}}}$

B)
$\text{E}{{\text{L}}^{\text{2}}}\operatorname{co}\text{s}\,$

C)
$\text{E}{{\text{L}}^{\text{2}}}\sin \,$

D)
0

• question_answer46) A series combination of ${{n}_{1}}$ capacitors, each of value ${{C}_{1}},$ is charged by a source of potential difference  4V. When another parallel combination of ${{n}_{2}}$ capacitors, each of value ${{C}_{2}},$ is charged by a source of potential difference V, it has the same (total) energy stored in it, as the first combination has. The value of ${{C}_{2}},$ in terms of ${{C}_{1}},$ is then

A)
$\frac{2{{C}_{1}}}{{{n}_{1}}\,{{n}_{2}}}$

B)
$16\frac{{{n}_{2}}}{{{n}_{1}}\,}{{C}_{1}}$

C)
$2\frac{{{n}_{2}}}{{{n}_{1}}\,}{{C}_{1}}$

D)
$\frac{16{{C}_{1}}}{{{n}_{1}}\,{{n}_{2}}\,}$

• question_answer47) Electromagnets are made of soft iron because soft iron has

A)
low retentively and high coercive force

B)
high retentively and high coercive force

C)
low receptivity and low coercive force

D)
high retentively and low coercive force

• question_answer48) A square current carrying loop is suspended in a uniform magnetic field acting in the plane of the loop. If the force on one arm of the loop is$\overset{\to }{\mathop{\mathbf{F}}}\,$, the net force on the remaining three arms of the loop is

A)
$3\overset{\to }{\mathop{\mathbf{F}}}\,$

B)
$-\overset{\to }{\mathop{\mathbf{F}}}\,$

C)
$-3\overset{\to }{\mathop{\mathbf{F}}}\,$

D)
$\overset{\to }{\mathop{\mathbf{F}}}\,$

• question_answer49) Consider the following two statements (A) Kirchhoffs junction law follows from the conservation of charge. (B) Kirchhoffs loop law follows from the conservation of energy. Which of the following is correct?

A)
Both (A) and (B) are wrong

B)
is correct and (B) is wrong

C)
is wrong and (B) is correct

D)
Both (A) and (B) are correct

• question_answer50) To get an output Y = 1 from the circuit shown below, the input must be

A)
A             B             C                 0              1              0

B)
0              0              1

C)
1              0              1

D)
1              0              0

• question_answer51)   For the reaction, ${{N}_{2}}{{O}_{5}}(g)\xrightarrow[{}]{{}}2N{{O}_{2}}(g)+\frac{1}{2}{{O}_{2}}(g)$the value of rate of disappearance of ${{\text{N}}_{\text{2}}}{{\text{O}}_{\text{5}}}$ is given as $6.25\times {{10}^{-3}}$$\text{mol}\,{{\text{L}}^{\text{-1}}}{{\text{s}}^{\text{-1}}}$. The rate of formation of NO 3 and 0; is given respectively as

A)
$6.25\times {{10}^{-3}}mol\,{{L}^{-1}}{{s}^{-1}}$and $6.25\times {{10}^{-3}}mol\,{{L}^{-1}}{{s}^{-1}}$

B)
$1.25\times {{10}^{-2}}mol\,{{L}^{-1}}{{s}^{-1}}$and $3.125\times {{10}^{-3}}mol\,{{L}^{-1}}{{s}^{-1}}$

C)
$6.25\times {{10}^{-3}}mol\,{{L}^{-1}}{{s}^{-1}}$and $3.125\times {{10}^{-3}}mol\,{{L}^{-1}}{{s}^{-1}}$

D)
$1.25\times {{10}^{-3}}mol\,{{L}^{-1}}{{s}^{-1}}$and $6.25\times {{10}^{-3}}mol\,{{L}^{-1}}{{s}^{-1}}$

• question_answer52) Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by

A)
oxidation

B)
cracking

C)
distillation under reduced pressure

D)
Hydrolysis

• question_answer53) In which of the following pairs of molecules/ions, the central atoms have $s{{p}^{2}}$ hybridisation ?

A)
$\text{NO}_{2}^{-}\text{and}\,\text{N}{{\text{H}}_{\text{3}}}$

B)
$\text{BF}_{\text{3}}^{{}}\text{and}\,\text{NH}_{2}^{-}$

C)
$\text{NH}_{\text{2}}^{\text{-}}\text{and}\,\text{H}_{2}^{{}}\text{O}$

D)
$\text{BF}_{3}^{{}}\text{and}\,\text{NH}_{2}^{-}$

• question_answer54) Which one of the following does not exhibit the phenomenon of mutarotation?

A)
(+) Sucrose

B)
(+) Lactose

C)
(+) Maltose

D)
(-) Fructose

• question_answer55) Which one of the following species does not exist under normal conditions?

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

B)
$\text{Be}_{\text{2}}^{{}}$

C)
$\text{B}_{\text{2}}^{{}}$

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

• question_answer56) Which of the following complex ions is not expected to absorb visible light?

A)
${{\text{ }\!\![\!\!\text{ Ni(CN}{{\text{)}}_{\text{4}}}\text{ }\!\!]\!\!\text{ }}^{\text{2-}}}$

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

C)
${{\text{ }\!\![\!\!\text{ Fe(}{{\text{H}}_{2}}\text{O}{{\text{)}}_{6}}\text{ }\!\!]\!\!\text{ }}^{\text{2+}}}$

D)
${{\text{ }\!\![\!\!\text{ Ni(}{{\text{H}}_{2}}\text{O}{{\text{)}}_{6}}\text{ }\!\!]\!\!\text{ }}^{\text{2+}}}$

• question_answer57) Given are cyclohexanol (I), acetic acid (II), 2, 4, 6-trinitrophenol (III) and phenol (IV). In these, the order of decreasing acidic character will be

A)
III > II > IV > I

B)
II > III > I > IV

C)
II > III > IV > I

D)
III > IV > II > I

• question_answer58) If pH of a saturated solution of $Ba{{(OH)}_{2}}$ is 12, the value of its ${{K}_{sp}}$ is

A)
$\text{4}\text{.00 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-6}}}{{\text{M}}^{\text{3}}}$

B)
$\text{4}\text{.00 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-7}}}{{\text{M}}^{\text{3}}}$

C)
$\text{5}\text{.00 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-6}}}{{\text{M}}^{\text{3}}}$

D)
$\text{5}\text{.00 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-7}}}{{\text{M}}^{\text{3}}}$

• question_answer59) The reaction of toluene with$\text{C}{{\text{l}}_{\text{2}}}$ in presence of $\text{FeC}{{\text{l}}_{3}}$gives V and reaction in presence of light gives V. Thus, V and Y are

A)
X = Benzal chloride, Y = o-chlorotoluene

B)
X = m-chlorotoluene, Y = p-chlorotoluene

C)
X = o-and p-chlorotoluene Y = trichloromethyl benzene

D)
X = benzyl chloride, Y = m-chlorotoluene

• question_answer60) Which one of the following compounds has the most acidic nature?

A)

B)

C)

D)

• question_answer61) In a set of reactions, ethyl benzene yielded a product D. ?D? would be

A)

B)

C)

D)

• question_answer62) What is $\text{ }\!\![\!\!\text{ }{{\text{H}}^{\text{+}}}\text{ }\!\!]\!\!\text{ }$ in mol/L of a solution that is 0.20 M in $\text{C}{{\text{H}}_{\text{3}}}\text{COONa}$ and 0.10 M in $\text{C}{{\text{H}}_{\text{3}}}\text{COOH}$ ? (Ka for $\text{C}{{\text{H}}_{\text{3}}}\text{COOH=1}\text{.8}\times \text{1}{{\text{0}}^{\text{-5}}}$)

A)
$3.5\times {{10}^{-4}}$

B)
$1.1\times {{10}^{-5}}$

C)
$1.8\times {{10}^{-5}}$

D)
$9.0\times {{10}^{-6}}$

• question_answer63) For an endothermic reaction, energy of activation is ${{E}_{a}}$ and enthalpy of reaction is $\Delta H$(both of these in kJ/mol). Minimum value of ${{E}_{a}}$ will be

A)
less than $\Delta H$

B)
equal to $\Delta H$

C)
more than $\Delta H$

D)
equal to zero

• question_answer64) The correct order of increasing reactivity of C?X bond towards nucleophile in the following compounds is

A)
I < II < IV < III

B)
II < III < I < IV

C)
IV < III < I < II

D)
III < II < I < IV

• question_answer65) For the reduction of silver ions with copper metal, the standard cell potential was found to be + 0.46V at 25°C. The value of standard Gibbs energy, $\Delta {{G}^{o}}$will be $(F=96500\,C\,mo{{l}^{-1}})$

A)
-89-0 kJ

B)
-89.0 J

C)
-44.5 kJ

D)
-98.0k J

• question_answer66) In which of the following equilibrium ${{K}_{c}}$ and ${{K}_{p}}$ are not equal?

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

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

C)
${{H}_{2}}(g)+{{I}_{2}}(g)2HI(g)$

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

• question_answer67) Which of the following ions will: exhibit colour in aqueous solutions ?

A)
$L{{a}^{3+}}(Z=57)$

B)
$T{{i}^{3+}}(Z=22)$

C)
$L{{u}^{3+}}(Z=71)$

D)
$S{{c}^{3+}}(Z=21)$

• question_answer68) Aniline in a set of the following reactions yielded a coloured product V.                    The structure of ?Y? would be

A)

B)

C)

D)

• question_answer69) Acetamide is treated with the following reagents separately. Which one of these would yield methyl amine ?

A)
$NaOH-B{{r}_{2}}$

B)
Sodalime

C)
Hot conc${{H}_{2}}S{{O}_{4}}$

D)
$PC{{l}_{5}}$

• question_answer70) An aqueous solution is 1.00 molal in KI. Which change will cause the vapour pressure of the solution to increase?

A)
Addition of $NaCl$

B)
Addition of $N{{a}_{2}}S{{O}_{4}}$

C)

D)

• question_answer71) A solution of sucrose   (molar mass $=342\,g\,\,\text{mo}{{\text{l}}^{-1}}$) has been prepared by dissolving 68.5 g of sucrose in 1000 g of water. The freezing point of the solution obtained will be (${{k}_{f}}$ for water $=1.86\,\,K\,\,kg\,\,mo{{l}^{-1}}$)

A)
-0.372°C

B)
-0.520°C

C)
+ 0.372°C

D)
- 0.570° C

• question_answer72) Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy ?

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

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

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

D)
$SrS{{O}_{4}}$

• question_answer73) Which one of the following ions has electronic configuration $[Ar]\,3{{d}^{6}}$ ? (At. no: Mn = 25, Fe = 26, Co = 27, Ni = 28)

A)
$\text{N}{{\text{i}}^{\text{3+}}}$

B)
$\text{M}{{\text{n}}^{\text{3+}}}$

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

D)
$\text{C}{{\text{o}}^{\text{3+}}}$

• question_answer74) An increase in equivalent conductance of a strong electrolyte with dilution is mainly due  to

A)
increase in ionic mobility of ions

B)
100% ionisation of electrolyte at normal dilution

C)
increase in both, ie, number of ions and ionic mobility of ions

D)
increase in number of ions

• question_answer75) Crystal field stabilization energy for high spin ${{d}^{4}}$ octahedral complex is

A)
$-1.8{{\Delta }_{o}}$

B)
$-1.6{{\Delta }_{o}}+P$

C)
$-1.2{{\Delta }_{o}}$

D)
$-0.6{{\Delta }_{o}}$

• question_answer76) Oxidation states of P in${{H}_{4}}{{P}_{2}}{{O}_{5}},$${{H}_{4}}{{P}_{2}}{{O}_{6}},$${{H}_{4}}{{P}_{2}}{{O}_{7}},$ are respectively

A)
+ 3, + 5, + 4

B)
+ 5, + 3, + 4

C)
+ 5, + 4, + 3

D)
+ 3, + 4, + 5

• question_answer77) Which of the following statements about primary amines is false?

A)
Alkyl amines are stronger bases than aryl amines

B)
Alkyl amines react with nitrous acid to produce alcohols

C)
Aryl amines react with nitrous acid to produce phenols

D)
Alkyl amines are stronger bases than ammonia

• question_answer78) The correct order of increasing bond angles in the following species-is

A)
$C{{l}_{2}}O<Cl{{O}_{2}}<ClO_{2}^{-}$

B)
$C{{l}_{2}}O<C{{l}_{2}}O<ClO_{2}^{-}$

C)
$C{{l}_{2}}O<ClO_{2}^{-}<ClO_{2}^{{}}$

D)
$ClO_{2}^{-}<C{{l}_{2}}O<ClO_{2}^{{}}$

• question_answer79) Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is

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

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

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

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

• question_answer80) 25.3 g of sodium carbonate, $N{{a}_{2}}C{{O}_{3}}$is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, molar concentration of sodium ion, $N{{a}^{+}}$ and carbonate ion, $CO_{3}^{2-}$ are respectively     (Molar     mass     of $N{{a}_{2}}C{{O}_{3}}=106g\,mo{{l}^{-1}}$)

A)
0.955 M and 1.910 M

B)
1.910 M and 0.955 M

C)
1.90 M and 1.910 M

D)
0.477 M and 0.477 M

• question_answer81) In a buffer solution containing equal concentration of ${{B}^{-}}$ and HB, the ${{K}_{b}}$ for ${{B}^{-}}$ is ${{10}^{-10}}$ The pH of buffer solution is

A)
10

B)
7

C)
6

D)
4

• question_answer82) The existence of two different coloured complexes   with   the   composition   of ${{[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]}^{+}}$ is due to

A)

B)
geometrical isomerism

C)
coordination isomerism

D)
ionization isomerism

• question_answer83) Property of the alkaline earth metals that increases with their atomic number

A)
solubility of their hydroxides in water

B)
solubility of their sulphates in water

C)
ionisation energy

D)
electro negativity

• question_answer84) During the kinetic study of the reaction, $2A+B\to C+D,$ following  results  were obtained $Ru\,[A]/mol\,{{L}^{-1}}[B]/mol\,{{L}^{-1}}$Initial rate of formation of $D/mol\,{{L}^{-1}}{{\min }^{-1}}$ I               0.1          0.1          $6.0\times {{10}^{-3}}$ II             0.3          0.2          $7.2\times {{10}^{-2}}$ III            0.3          0.4          $2.88\times {{10}^{-1}}$ IV            0.4          0.1          $2.40\times {{10}^{-2}}$ Based on the above data which one of the following is correct ?

A)
$rate=k{{[A]}^{2}}[B]$

B)
$rate=k[A][B]$

C)
$rate=k{{[A]}^{2}}{{[B]}^{2}}$

D)
$rate=k[A]{{[B]}^{2}}$

• question_answer85) Which of the following pairs has the same size?

A)
$F{{e}^{2+}},N{{i}^{2+}}$

B)
$Z{{r}^{4+}},T{{i}^{4+}}$

C)
$Z{{r}^{4+}},H{{f}^{4+}}$

D)
$Z{{n}^{2+}},H{{f}^{4+}}$

• question_answer86) The correct order of the decreasing ionic radii among the following is electronic species is

A)
$C{{a}^{2+}}>{{K}^{+}}>{{S}^{2-}}>C{{l}^{-}}$

B)
$C{{l}^{-}}>{{S}^{2-}}>C{{a}^{2+}}>{{K}^{+}}$

C)
${{S}^{2-}}>C{{l}^{-}}>{{K}^{+}}>C{{a}^{2+}}$

D)
${{K}^{+}}>C{{a}^{2+}}>C{{l}^{-}}>{{S}^{2-}}$

• question_answer87) In which one of the following species the central atom has the type of hybridization which is not the same as that present in the other three ?

A)
$S{{F}_{4}}$

B)
$I_{3}^{-}$

C)
$SbCl_{5}^{2-}$

D)
$PC{{l}_{5}}$

• question_answer88) Standard entropies of ${{X}_{2}},{{Y}_{2}}$and $X{{Y}_{3}}$are 60, 40 and $50\,J\,{{K}^{-1}}\,mo{{l}^{-1}}$respectively. For the reaction $\frac{1}{2}{{X}_{2}}+\frac{3}{2}{{Y}_{2}}X{{Y}_{3}};\Delta H=-30kJ,$to be at equilibrium, the temperature should be

A)
750 K

B)
1000 K

C)
1250 K

D)
500 K

• question_answer89) Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements O, S, F and Cl ?

A)
CI < F < O < S

B)
O < S < F < CI

C)
F < S < O < CI

D)
S < O < CI < F

• question_answer90) Which one of the following compounds is a peroxide ?

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

B)
$Ba{{O}_{2}}$

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

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

• question_answer91) Which one is most reactive towards electrophonic reagent?

A)

B)

C)

D)

• question_answer92) Which one of the following is employed as a tranquilizer drug ?

A)
Promethazine

B)
Valium

C)
Naproxen

D)
Mifepristone

• question_answer93) In the following the most stable conformation of n-butane is

A)

B)

C)

D)

• question_answer94) Which of the following reactions will not result in the formation of carbon-carbon bonds?

A)
Reimer-Tiemann reaction

B)
Cannizaro reaction

C)
Wurtz reaction

D)
Friedel-Crafts acylation

• question_answer95) Which of the following structures represents neoprene polymer ?

A)
$-(C{{H}_{2}}-)\underset{\begin{smallmatrix} | \\ Cl \end{smallmatrix}}{\mathop{C}}\,=CH-C{{H}_{2}}){{-}_{n}}$

B)
$-(C{{H}_{2}}-\underset{{}}{\overset{\begin{smallmatrix} CN \\ | \end{smallmatrix}}{\mathop{C}}}\,H){{-}_{n}}$

C)
$-(C{{H}_{2}}-\underset{{}}{\overset{\begin{smallmatrix} CN \\ | \end{smallmatrix}}{\mathop{C}}}\,H){{-}_{n}}$

D)
$-(\underset{\begin{smallmatrix} | \\ {{C}_{6}}{{H}_{5}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}){{-}_{n}}$

• question_answer96) Which one is most reactive towards ${{S}_{N}}1$reaction?

A)
${{C}_{6}}{{H}_{5}}CH({{C}_{6}}{{H}_{5}})Br$

B)
${{C}_{6}}{{H}_{5}}CH(C{{H}_{3}})Br$

C)
${{C}_{6}}{{H}_{5}}C(C{{H}_{3}})({{C}_{6}}{{H}_{5}})Br$

D)
${{C}_{6}}{{H}_{5}}C{{H}_{2}}Br$

• question_answer97) AB crystallizes in a body centred cubic lattice with edge length 'a' equal to 387 pm. The distance between two oppositively charged ions in the lattice is

A)
335 pm

B)
250 pm

C)
200 pm

D)
300 pm

• question_answer98) The number of atoms in 0.1 mole of a diatomic gas is $({{N}_{A}}=6.02\times {{10}^{23}}mo{{l}^{-1}})$

A)
$6.026\times {{10}^{22}}$

B)
$1.806\times {{10}^{23}}$

C)
$3.600\times {{10}^{23}}$

D)
$1.800\times {{10}^{22}}$

• question_answer99) Which one of the following molecular hydrides acts as a Lewis acid ?

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

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

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

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

• question_answer100) The tendency of $B{{F}_{3}},\,BC{{l}_{3}}$ and $BB{{r}_{3}}$ to behave as Lewis acid decreases in the sequence

A)
$BC{{l}_{3}}>B{{F}_{3}}BB{{r}_{3}}$

B)
$BB{{r}_{3}}>BC{{l}_{3}}>B{{F}_{3}}$

C)
$BB{{r}_{3}}>B{{F}_{3}}>BC{{l}_{3}}$

D)
$B{{F}_{3}}>BC{{l}_{3}}>BB{{r}_{3}}$

• question_answer101) In vitro fertilization is a technique that involves transfer of which one of the following into the Fallopian tube?

A)
Embryo only, upto 8 cell stage

B)
Either zygote or early embryo upto 8 cell stage

C)
Embryo of 32 cell stage

D)
Zygote only

• question_answer102) Which one of the following structures between two adjacent cells is an effective transport pathway?

A)
Plasmodesmata

B)
Plastoquinones

C)
Endoplasmic reticulum

D)
Plasmalemma

• question_answer103) Single-celled eukaryotes are included in

A)
Protista

B)
Fungi

C)
Archaea

D)
Monera

• question_answer104) The genetically-modified (GM) brinjal in India has been developed for

A)
insect-resistance

B)
enhancing self life

C)
enhancing mineral content

D)
drought-resistance

• question_answer105) In unilocular ovary with a single ovule, the placentation is

A)
marginal

B)
basal

C)
free central

D)
axile

• question_answer106) An element playing important role in nitrogen fixation is

A)
molybdenum

B)
copper

C)
manganese

D)
zinc

• question_answer107) Sertoli cells are found in

A)
ovaries and secrete progesterone

B)

C)
somniferous tubules and provide nutrition to germ cells

D)
pancreas and secrete cholecystokinin

• question_answer108) Which one of the following cannot be explained on the basis of Mendel's Law of Dominance?

A)
The discrete unit controlling a particular character is called a factor

B)
Out of one pair of factors one is dominant, and the other recessive

C)
Alleles do not show any blending and both the characters recover as such in ${{F}_{2}}$generation

D)
Factors occur in pairs

• question_answer109) Apomictic embryos in Citrus arise from

A)
synergids

B)
maternal sporophytic tissue in ovule

C)
antipodal cells

D)
diploid egg

• question_answer110) One example of animals having a single opening to the outside that serves both as mouth as well as anus is

A)
Octopus

B)
Asterios

C)
Ascidia

D)
Fasciola

• question_answer111) Select the correct statement from the ones given below

A)
Barbiturates when given to criminals make them tell the truth

B)
Morphine is often given to persons who have under gone surgery as a pain killer

C)
Chewing tobacco lowers blood pressure and heart rate

D)
Cocaine is given to patients after surgery as it stimulates recovery

• question_answer112) Listed below are four respiratory capacities (1 - 4)and four jumbled respiratory volumes of a normal human adult Respiratory         Respiratory capacities            volumes (1) Residual volume        2500 mL (2) Vital capacity               3500 mL (3) Inspiratory reserve   1200 mL volume (4) Inspiratory capacity 4500 mL Which one of the following is the correct matching of two capacities and volumes?

A)
(2) 2500 mL,                        (3) 4500 mL

B)
(3) 1200 mL,                        (4) 2500 mL

C)
(4) 3500 mL,                        (1) 1200 mL

D)
(1) 4500 mL,                        (2) 3500 mL

• question_answer113) The chief water conducting elements of xylem in gymnosperms are

A)
vessels

B)
fibres

C)
transfusion tissue

D)
tracheids

• question_answer114) Ringworm in humans is caused by

A)
bacteria

B)
fungi

C)
nematodes

D)
viruses

• question_answer115) Which one of the following is not a micronutrient?

A)
Molybdenum

B)
Magnesium

C)
Zinc

D)
Boron

• question_answer116) Membrane-bound organelles are absent in

A)
Saccharomyces

B)
Streptococcus

C)
Chlamydomonas

D)
PIasmodium

A)
testicular lobules to rete tesds

B)
rete testis to vas deferens

C)
vas deferens to epididymis

D)
epididymis to urethra

• question_answer118) Select the correct statement from the following

A)
Biogas is produced by the activity of aerobic bacteria on animal waste

B)
Methanobacterium is an aerobic bacterium found in rumen of cattle

C)
Biogas, commonly called gobar gas, is pure Methane

D)
Activated sludge-sediment in settlement tanks of sewage treatment plant is a right source of aerobic bacteria

• question_answer119) Select the two statements out of the four (1-4) given below about (ac operon. (1) Glucose or galactose may bind with the represser and inactivate it (2) In the absence of lactose, the represser binds with the operator region (3) The z-gene codes for permease (4) This was elucidated by Francois Jacob and Jacques Monod The correct statements are

A)
(2) and (3)

B)
(2) and (3)

C)
(2) and (4)

D)
(1) and (2)

• question_answer120) Keel is characteristic of the flowers of

A)
gulmohur

B)
Cassia

C)
Calotropis

D)
bean

• question_answer121) The kind of epithelium  which forms the inner walls of blood vessels is

A)
cuboidal epithelium

B)
columnar epithelium

C)
ciliated columnar epithelium

D)
squamous epithelium

• question_answer122) Which one of the following has its own DNA?

A)
Mitochondria

B)
Dictyosome

C)
Lysosome

D)
Peroxisome

• question_answer123) Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called

A)
xenogamy

B)
geitonogamy

C)
karyogamy

D)
autogamy

• question_answer124) The genotype of a plant showing the dominant phenotype can be determined by

A)
test cross

B)
dihybrid cross

C)
pedigree analysis

D)
back cross

• question_answer125) PGA as the first $C{{O}_{2}}$fixation product was discovered in photosynthesis of

A)
bryophyte

B)
gymnosperm

C)
angiosperm

D)
alga

• question_answer126) Study the four statements (1 - 4) given below and select the two correct ones out of them. (1) A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers                                  (2) Predator star fish Pisaster helps in maintaining species diversity of some invertebrates (3) Predators ultimately lead to the extinction of prey species          (4) Production of chemicals such as nicotine, strychnine by the plants are metabolic disorders The two correct statements are

A)
(2) and (3)

B)
(3) and (4)

C)
(1) and (4)

D)
(1) and (2)

• question_answer127) Seminal plasma in human males is rich in

A)
fructose and calcium

B)
glucose and calcium

C)
DNA and testosterone

D)
ribose and potassium

• question_answer128) ABO blood groups in humans are controlled by the gene I. It has three alleles $\text{-}{{\text{I}}^{\text{A}}}\text{,}{{\text{I}}^{\text{B}}}$ and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?

A)
Three

B)
One

C)
Four

D)
Two

• question_answer129) Breeding of crops with high levels of minerals, vitamins and proteins is called

A)
somatic hybridization

B)
bio fortification

C)
bio magnification

D)
micro propagation

• question_answer130) A common bio control agent for the control of plant diseases is

A)
Baculovirus

B)
Bacillus thuringierisis

C)
Gibmus

D)
Trichoderma

• question_answer131) Widal test is used for the diagnosis of

A)
malaria

B)
pneumonia

C)
tuberculosis

D)
typhoid

• question_answer132) Injury to adrenal cortex is not likely to affect the secretion of which one of the following?

A)
Aldosterone

B)
Both androstenedione and dehydroepiandrosterone

C)

D)
Cortisol

• question_answer133) Low $C{{a}^{2+}}$in the body fluid may be the cause of

A)
tetany

B)
anaemia

C)
angina pectoris

D)
gout

• question_answer134) Which one of the following pairs is incorrectly matched?

A)
Glucagon                             ? Beta cells (source)

B)
Somatostatin                     ? Delta cells (source)

C)
Corpus luteum                 ? Relaxin (secretion)

D)
Insulin                                   ? Diabetes mellitus (disease)

• question_answer135) Select the correct statement from the ones given below with respect to dihybrid cross.

A)
Tightly linked genes on the same chromosome show higher recombinations

B)
Genes far apart on the same chromosome show very few recombinations

C)
Genes loosely linked on the same chromosome show similar recombinations as the tightly linked ones

D)
Tightly linked genes on the same chromosome    show    very    few recombinations

• question_answer136) Which one of the following statements in regard to the excretion by the human kidneys is correct?

A)
Descending limb of Loop of Henie is impermeable to water

B)
Distal convoluted tubule is incapable of reabsorbing$HC{{O}_{3}}$

C)
Nearly 99 per cent of the glomerular filtrate is reabsorbed by the renal tubules

D)
Ascending limb of loop of Henie is impermeable to electrolytes

• question_answer137) The nerve centres which control the body temperature and the urge for eating are contained in

A)
hypothalamus

B)
pons

C)
cerebellum

D)
thalamus

• question_answer138) The biomass available for consumption by the herbivores and the decomposers is called

A)
net primary productivity

B)
secondary productivity

C)
standing crop

D)
gross primary productivity

• question_answer139) If due to some injury the chordae tendinae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?

A)
The flow of blood into the aorta will be slowed down

B)
The 'pacemaker' will stop working

C)
The blood will tend to flow back into the left atrium

D)
The flow of blood into the pulmonary artery will be reduced

• question_answer140) Ovary is half-inferior in the flowers of

A)
guava

B)
plum

C)
brinjal

D)
cucumber

• question_answer141) Which one of the following is used as vector for cloning genes into higher organisms?

A)
Baculovirus

B)
Salmonella typhimurium

C)
Rhizopus nigricans

D)
Retrovirus

• question_answer142) The one aspect which is not a salient feature of genetic code, is its being'

A)
degenerate

B)
ambiguous

C)
universal

D)
specific

• question_answer143) Which one of the following is an example of ex-situ conservation?

A)
Wildlife sanctuary

B)
Seed bank

C)
Sacred groves

D)
National park

• question_answer144) Which one of the following palindromic base sequences in DNA can be easily cut at about the middle by some particular restriction enzyme?

A)
5' - CGTTCG - 3' 3' - ATGGTA - 5'

B)
5' - GATATG - 3' 3' - CTACTA - 5'

C)
5' - GAATTC - 3' 3' - CTTAAG - 5'

D)
5' - CACGTA - 3' 3' - CTCAGT - 5'

• question_answer145) Which one of the following statements- is correct with respect to AIDS?

A)
The HIV can be transmitted through eating food together with an infected person

B)
Drug addicts are least susceptible to HIV infection

C)
AIDS patients are being fully cured cent per cent with proper care and nutrition

D)
The causative HIV retrovirus enters helper T-lymphocytes   thus   reducing their numbers

• question_answer146) Photottopic curvature is the result of uneven distribution of

A)
gibberellin

B)
phytochrome

C)
cytokinins

D)
auxin

• question_answer147) The figure given below is a diagrammatic representation of response of organisms to abiotic factors. What do A, B and C represent respectively?

A)
A                             B                                             C Conformer                          Regulator                            Partial regulator

B)
Regulator                            Partial regulator                Partial regulator

C)
Partial regulator                Regulator                            Conformer

D)
Regulator                            Conformer                          Partial regulator

• question_answer148) Male   and   female   gametophytes   are independent and free-living in

A)
mustard

B)
castor

C)
Pinus

D)
Sphagnum

• question_answer149) The technical term used for the androecium in a flower of China rose (Hibiscus rosa sinensis) is

A)

B)

C)
polyandrous

D)

• question_answer150) Virus envelope is known as

A)
capsid

B)
virion

C)
nucleoprotein

D)
core

• question_answer151) The permissible use of the technique amniocentesis is for

A)
detecting sex of the unborn foetus

B)
artificial insemination

C)
transfer of embryo into the uterus of a surrogate mother

D)
detecting any genetic abnormality

• question_answer152) During mitosis ER and nucleolus begin to disappear at

A)
late prophase

B)
early metaphase

C)
late metaphase

D)
early prophase

• question_answer153) The free-living, anaerobic nitrogen-fixer is

A)
Beijerinckia

B)
Rhodospirillum

C)
Rhizobium

D)
Azotobacter

• question_answer154) DNA or RNA segment tagged with a radioactive molecule is called

A)
vector

B)
probe

C)
clone

D)
plasmid

• question_answer155) Darwin's finches are a good example of

A)
industrial melanism

B)

C)

D)
convergent evolution

• question_answer156) The signals for parturition originate from

A)
placenta only

B)
placenta as well as fully developed foetus

C)
oxytocin released from maternal pituitary

D)
fully developed foetus only

A)
They carry about 20-25 per cent of $C{{O}_{2}}$

B)
They transport 99.5 per cent of ${{O}_{2}}$

C)
They transport about 80 per cent oxygen only and the rest 20 per cent of it is transported in' dissolved/ state in blood plasma

D)
They do not carry $C{{O}_{2}}$ at all

• question_answer158) Which stages of cell division do the following figures A and B represent respectively?

A)
Metaphase                         -     Telophase

B)
Telophase                           -     Metaphase

C)
Lateanaphase                    -     Prophase

D)
Prophase                             -     Anaphase

• question_answer159) The main arena of various types of activities of a cell is

A)
plasma membrane

B)
mitochondrion

C)
cytoplasm

D)
nucleus

A)
Rhizobium

B)
Azospirillum

C)
Oscillatoria

D)
Frankia

• question_answer161) The principal nitrogenous excretory compound in humans is synthesized

A)
in kidneys but eliminated mostly through liver

B)
in kidneys as well as eliminated by kidneys

C)
in liver and also eliminated by the same through bile

D)
in the liver, but eliminated mostly through kidneys

• question_answer162) Carrier ions like $N{{a}^{+}}$ facilitate the absorption of substance like

A)
amino acids and glucose

B)
glucose and fatty acids

C)
fatty acids and glycerol

D)
fructose and some amino acids

• question_answer163) Which one of the following symbols and its - representation, used in human pedigree analysis is correct?

A)
$\square =\text{O=}$ Mating between relatives

B)
$\text{O=}$ Unaffected male

C)
$\square \text{=}$ Unaffected female

D)
Male affected

• question_answer164) Which two of the following changes (1- 4) usually tend to occur in the plain dwellers when they move to high altitudes. (3,500 m or more)? (1) Increase in red blood cell size (2) Increase in red blood cell production (3) Increased breathing rate (4) Increase in thrombocyte count Changes occurring are

A)
(2) and (3)

B)
(3) and (4)

C)
(1) and (4)

D)
(1) and (2)

• question_answer165) Toxic agents present in food which ?interfere with  thyroxin  synthesis  lead  to  the development of

A)
toxic goitre

B)
cretinism

C)
simple goitre

D)
thyrotoxicosis

• question_answer166) If for some reason our goblet cells are non-functional, this will adversely affect

A)
production of somatostatin

B)
secretion of sebum from the sebaceous glands

C)
maturation of sperms

D)
smooth movement of food down the intestine

• question_answer167) The plasma membrane consists mainly of

A)
phospholipids embedded in a protein bilayer

B)
proteins embedded in a phospholipid bilayer

C)
proteins embedded in a polymer of glucose molecules

D)
proteins embedded in a .carbohydrate bilayer

• question_answer168) Which one of the following statements about all the four of Spongilla, leech, dolphin and penguin is correct?

A)
Penguin is hbmoiothermic while the remaining three are poikilothermic

B)
Leech is a fresh water form while all others are marine

C)
Spongilla has special collared cells called choanocytes, not found in the remaining three

D)
All are bilaterally symmetrical

• question_answer169) The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregancy?

A)
Fourth month

B)
Fifth month

C)
Sixth month

D)
Third month

• question_answer170) The scutellum observed in a grain of wheat or maize is comparable to which part of, the seed in other monocotyledons?

A)
Cotyledon

B)
Endosperm

C)
Aleurone layer

D)
Plumule

• question_answer171) Which one of the following kinds of animals are triploblastic?

A)
Flat worms

B)
Sponges

C)
Ctenophores

D)
Corals

• question_answer172) Which one of the following statements about certain given animals is correct?

A)
Round worms   (Aschelminthes) are pseudocoelomates

B)
Molluscs are acoelpmates

C)
Insects are pseudocoelomates

D)
Flat worms (Platyhelminthes) are coelomates

• question_answer173) Cu ions released from copper-releasing Intra Uterine Devices (lUDs)

A)
make uterus unsuitable for implantation

B)
increase phagocytosis of sperms

C)
suppress sperm motility

D)
prevent ovulation

• question_answer174) The energy-releasing metabolic process in which substrate is oxidised without an external electron acceptor is called

A)
glycolysis

B)
fermentation

C)
aerobic respiration

D)
photorespiration

• question_answer175) Restriction endonucleases are enzymes which

A)
make cuts at specific positions within the  DNA molecule

B)
recognize a specific nucleotide sequence for binding of DNA ligase

C)
restrict the action of the enzyme DNA polymerase

D)
remove nucleotides from the ends of the DNA molecule

• question_answer176) Which one of the following is not a lateral meristem?

A)
Intrafascicular cambium

B)
Interfascicular cambium

C)
Phellogen

D)
Intercalary meristem

• question_answer177) A renewable exhaustible natural resource is

A)
coal

B)
petroleum

C)
minerals

D)
forest

• question_answer178) Photoperiodism was first characterised in

A)
tobacco

B)
potato

C)
tomato

D)
cotton

• question_answer179) ${{\text{C}}_{\text{4}}}\text{-}$plants are more efficient in photosynthesis than ${{\text{C}}_{3}}\text{-}$plants due to

A)
higher leaf area

B)
presence of larger number of chloroplasts in the leaf cells

C)
presence of thin cuticle

D)
lower rate of photorespiration

A)
cellulose, galactans and mannans

B)
hemicellulose, pectins and proteins

C)
pectins, cellulose and proteins

D)
cellulose, hemicellulose and pectins

• question_answer181) Some hyperthermophilic organisms that grow in highly acidic (pH 2) habitats belong to the two groups called

A)
eubacteria and archaea

B)
cyanobacteria and diatoms

C)
protists and mosses

D)
liverworts and yeasts

• question_answer182) Genetic engineering has been successfully used for producing

A)
transgenic mice for testing safety of polio vaccine before use in humans

B)
transgenic models for studying new treatments for certain cardiac diseases

C)
transgenic cow-Rosie which produces high fat milk for making ghee

D)
animals like bulls for farm work-as they have super power

• question_answer183) Some of the characteristics of Bt cotton are

A)
long fibre and resistance to aphids

B)
medium yield, long fibre and resistance to beetle pests

C)
high yield and production of toxic protein crystals which kill dipteran pests

D)
high yield and resistance to bollworms

• question_answer184) Heartwood differs from sapwood in

A)
presence of rays and fibres

B)
absence of vessels and parenchyma

C)

D)
being susceptible to pests and pathogens

• question_answer185) Satellite DNA is useful tool in

A)
organ transplantation

B)
sex determination

C)
forensic science

D)
genetic engineering

• question_answer186) The second maturation division of the mammalian ovum occurs

A)
shortly after ovulation before the ovum makes entry into the Fallopian tube

B)
until after the ovum has been penetrated by a sperm

C)
until the nucleus of the sperm has fused with that of the ovum

D)
in the Graafian follicle following the first maturation division

• question_answer187) Which one of the following does not follow the central dogma of molecular biology?

A)
Pea

B)
Mucor

C)
Chlamydomonas

D)
HIV

• question_answer188) Which one of the following statements about human sperm is correct?

A)
Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilization

B)
The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilization

C)
Acrosome serves as a sensory structure leading the sperm towards the ovum

D)
Acrosome serves no particular function

• question_answer189) Consider the following four statements (1-4) regarding kidney transplant and select the two correct ones out of these. (1) Even if a kidney transplant is proper the recipient    may   need    to    take immune-suppresants for a long time (2) The cell-mediated immune response is responsible for the graft rejection (3) The B-lymphocytes are responsible for rejection of the graft (4) The acceptance of rejection of a kidney transplant depends on specific interferon?s The two correct statements are

A)
(2) and (3)

B)
(3) and (4)

C)
(1) and (3)

D)
(1) and (2)

• question_answer190) Wind pollinated flowers are

A)
small, brightly coloured, producing large number of pollen grains

B)
small, producing large number of dry pollen grains

C)
large, producing abundant nectar and pollen

D)
small, producing nectar and dry pollen

• question_answer191) dB is a standard abbreviation used for the quantitative expression of

A)
the density of bacteria in a medium

B)
a particular pollutant

C)
the dominant Bacillus in a culture

D)
a certain pesticide

• question_answer192) Which one of the following is one of the characteristics of a biological community?

A)
Stratification

B)
Natality

C)
Mortality

D)
Sex-ratio

• question_answer193) Which one of the following statements about morula in humans is correct?

A)
It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA

B)
It has far less cytoplasm as well as less DNA than in an uncleaved zygote

C)
It has more or less equal quantity of cytoplasm and DNA as in uncleaved zygote

D)
It has more cytoplasm and more DNA than an uncleaved zygote

• question_answer194) Coiling of garden pea tendrils around any support is an example of

A)
thigmotaxis

B)
thigmonasty

C)
thigmotropism

D)
thermotaxis

• question_answer195) The two gases making highest relative contribution to the greenhouse gases are

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

B)
$C{{H}_{4}}$ and $N{{O}_{2}}$

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

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

• question_answer196) Which one of the following is not used in organic farming?

A)
Glomus

B)
Earthworm

C)
Oscillatoria

D)
Snail

• question_answer197) Stirred-tank bioreactors have been designed for

A)
addition of preservatives of the product

B)
purification of the product

C)
ensuring anaerobic conditions in the culture vessel

D)
availability of oxygen throughout the process

• question_answer198) The part of fallopian tube closest to the ovary is

A)
isthmus

B)
infundibulum

C)
cervix

D)
ampulla

• question_answer199) An improved variety of transgenic basmati rice

A)
does not require chemical fertilizers and growth hormones

B)
gives high yield and is rich in vitamin-A

C)
is completely resistant to all insect pests and diseases of paddy

D)
gives high yield but has no characteristic aroma

• question_answer200) Infectious proteins are present in

A)
gemini viruses

B)
prions

C)
viroids

D)
satellite viruses