A physical quantity P is described by the relation \[P={{a}^{1/2}}{{b}^{2}}{{c}^{3}}{{d}^{-4}}.\] If the relative errors in the measurement of a, b, c and d respectively, are 2%, 1%, 3% and 5%, then the relative error in P will be
A)
8%
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B)
12%
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C)
32%
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D)
25%
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When a mass is rotating in a plane about a fixed point, its angular momentum is directed along the
A)
radius of orbit
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B)
tangent to the orbit
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C)
line parallel to plane of rotation
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D)
line perpendicular to plane of rotation
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An ideal gas heat engine operates in a Carnot cycle between \[227{}^\circ C\] and \[127{}^\circ C.\] It absorbs 6 kcal at the higher temperature. The amount of heat (in kcal) converted into work is equal to
A)
12
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B)
4.8
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C)
3.5
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D)
1.6
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If \[{{\mu }_{r}},\] \[{{\mu }_{k}}\] and \[{{\mu }_{s}}\] represent the coefficients of rolling friction, kinetic and static friction, then
A)
\[{{\mu }_{r}}={{\mu }_{s}}={{\mu }_{k}}\]
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B)
\[{{\mu }_{r}}>{{\mu }_{k}}>{{\mu }_{s}}\]
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C)
\[{{\mu }_{r}}<{{\mu }_{s}}<{{\mu }_{k}}\]
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D)
\[{{\mu }_{r}}<{{\mu }_{k}}<{{\mu }_{s}}\]
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A glass prism of refractive index 1.5 is immersed in water (refractive index 4/3). A light beam incident normally on the face AB is totally reflected to reach on the face BC if
A)
\[\sin \theta \ge \frac{8}{9}\]
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B)
\[\frac{2}{3}<\sin \theta <\frac{8}{9}\]
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C)
\[\sin \theta \le \frac{2}{3}\]
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D)
None of these
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Kirchhoff's I and II laws are based on conservation of
A)
energy and charge respectively
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B)
charge and energy respectively
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C)
mass and charge respectively
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D)
None of these
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If the density of a small planet is the same as that of earth, while the radius of the planet is 0.2 times that of the earth, the gravitational acceleration on the surface of the planet is
A)
0.2 g
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B)
0.4 g
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C)
2 g
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D)
4 g
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The work function of a metallic substance is 5 eV. The threshold frequency is approximately
A)
\[1.6\times {{10}^{7}}\,\,Hz\]
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B)
\[8.68\times {{10}^{15}}\,\,Hz\]
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C)
\[9.68\times {{10}^{17}}\,\,Hz\]
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D)
\[1.2\times {{10}^{15}}\,\,Hz\]
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A ball is dropped from the top of a tower of height 100 m and at the same time another ball is projected vertically upwards from ground with a velocity \[25\,\,m{{s}^{-1}}.\] Then the distance from the top of the tower, at which the two balls meet is
A)
68.4 m
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B)
48.4 m
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C)
18.4 m
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D)
78.4 m
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What is the ratio of the shortest wavelength of the Balmer series to the shortest wavelength of the Lyman series?
A)
4 : 1
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B)
4 : 3
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C)
4 : 9
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D)
5 : 9
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Three identical spheres, each of mass 1 kg are kept as shown in figure, touching each other, with their centres on a straight line. If their centres are marked P, Q, R respectively, the distance of centre of mass of the system from P is
A)
\[\frac{PQ+PR+QR}{3}\]
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B)
\[\frac{PQ+PR}{3}\]
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C)
\[\frac{PQ+QR}{3}\]
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D)
\[\frac{PR+QR}{3}\]
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Use of eddy currents is done in the following except
A)
moving coil galvanometer
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B)
electric brakes
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C)
induction motor
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D)
dynamo
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A satellite of mass m is put into a circular orbit of height h from the surface of the earth (mass \[={{M}_{e}},\] radius \[={{R}_{e}}\] ). The orbital speed of satellite is
A)
\[\sqrt{\frac{2G{{M}_{e}}h}{{{R}_{e}}({{R}_{e}}+h)}}\]
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B)
\[\sqrt{\frac{2G{{M}_{e}}}{{{R}_{e}}+h}}\]
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C)
\[\sqrt{\frac{G{{M}_{e}}}{({{R}_{e}}+{{h}^{3}})}}\]
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D)
\[\sqrt{\frac{G{{M}_{e}}}{2({{R}_{e}}+h)}}\]
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Consider the following statements and select the incorrect statement.
A)
The presence of a large magnetic flux through a coil maintains a current in the coil if the circuit is continuous.
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B)
A coil of a metal wire kept stationary in a non-uniform magnetic field has an e.m.f induced in it.
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C)
A charged particle enters a region of uniform magnetic field at an angle of \[85{}^\circ \] to the magnetic lines of force, the path of the particle is a circle.
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D)
There is no change in the energy of a charged particle moving in a magnetic field although a magnetic force is acting on it.
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16 g of oxygen at \[37{}^\circ C\] is mixed with 14 g of nitrogen at \[27{}^\circ C,\] the temperature of the mixture will be
A)
\[30.5{}^\circ C\]
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B)
\[37{}^\circ C\]
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C)
\[27{}^\circ C\]
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D)
\[32{}^\circ C\]
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At the centre of a cubical box +Q charge is placed. The value of total flux that is coming out a wall is
A)
\[Q/{{\varepsilon }_{o}}\]
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B)
\[Q/3{{\varepsilon }_{o}}\]
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C)
\[Q/4{{\varepsilon }_{o}}\]
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D)
\[Q/6{{\varepsilon }_{o}}\]
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A particle moves under the effect of a force \[F=cx\] from \[x=0\] to \[x={{x}_{1}},\] the work done in the process is
A)
\[cx_{1}^{2}\]
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B)
\[\frac{1}{2}cx_{1}^{2}\]
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C)
\[2\,cx_{1}^{2}\]
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D)
zero
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According to the kinetic theory of gases, the pressure exerted by a gas on the walls is measured as
A)
rate of change of momentum imparted to the walls per second per unit area.
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B)
momentum imparted to the walls per unit area
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C)
change of momentum imparted to the walls per unit area.
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D)
change in momentum per unit volume
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Six equal resistances are connected between points P, Q and R as shown in figure. Then net resistance will be maximum between:
A)
P and R
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B)
P and Q
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C)
Q and R
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D)
Any two points
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The fundamental frequency of a closed end organ pipe is n. Its length is doubled and radius is halved. Its frequency will become nearly
A)
n/2
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B)
n/3
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C)
n
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D)
2n
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A rain drop of radius 0.3 mm has a terminal velocity in air = 1 m/s. the viscosity of air is \[8\times {{10}^{-5}}\]poise. The viscous force on it is
A)
\[45.2\times {{10}^{-4}}\text{dyne}\]
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B)
\[101.73\times {{10}^{-5}}\text{dyne}\]
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C)
\[16.95\times {{10}^{-4}}\text{dyne}\]
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D)
\[16.95\times {{10}^{-5}}\text{dyne}\]
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A particle moves such that its acceleration 'a' is given by a = -bx where x is the displacement from equilibrium position and b is constant. The period of oscillation is
A)
\[2\pi /b\]
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B)
\[2\pi /\sqrt{b}\]
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C)
\[\sqrt{2\pi /b}\]
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D)
0\[2\sqrt{\pi /b}\]
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A person who can see things most clearly at a distance of 10 cm, requires spectacles to enable to see clearly things at a distance of 30 cm. What should be the focal length of the spectacles?
A)
15 cm (Concave)
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B)
15 cm (Convex)
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C)
10 cm
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D)
0
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The magnetic field of earth at the equator is approximately \[4\times {{10}^{-5}}\,T.\] The radius of earth is \[6.4\times {{10}^{6}}\,m.\] Then the dipole moment of the earth will be nearly of the order of:
A)
\[{{10}^{23}}\,\,\text{A}\,\,{{\text{m}}^{2}}\]
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B)
\[{{10}^{20}}\,\,\text{A}\,\,{{\text{m}}^{2}}\]
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C)
\[{{10}^{16}}\,\,\text{A}\,\,{{\text{m}}^{2}}\]
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D)
\[{{10}^{10}}\,\,\text{A}\,\,{{\text{m}}^{2}}\]
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A 2V battery is connected across AB as shown in the figure. The value of the current supplied by the battery when in one case battery's positive terminal is connected to A and in other case when positive terminal of battery is connected to B will respectively be:
A)
0.4 A and 0.2 A
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B)
0.2 A and 0.4 A
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C)
0.1 A and 0.2 A
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D)
0.2A and 0.1 A
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A passenger travels along the straight road for half the distance with velocity \[{{\text{v}}_{1}}\] and the remaining half distance with velocity\[{{\text{v}}_{1}}.\] Then average velocity is given by
A)
\[{{\text{v}}_{1}}{{\text{v}}_{2}}\]
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B)
\[{{\text{v}}_{2}}^{2}/{{\text{v}}_{1}}^{2}\]
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C)
\[({{\text{v}}_{1}}+{{\text{v}}_{2}})/2\]
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D)
\[2\,{{\text{v}}_{1}}{{\text{v}}_{2}}/({{\text{v}}_{1}}+{{\text{v}}_{2}})\]
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A point initially at rest moves along x-axis. Its acceleration varies with time as a \[=(6t+5)m/{{s}^{2}}.\]If it starts from origin, the distance covered in 2s is
A)
20 m
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B)
18 m
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C)
16 m
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D)
25 m
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A solid cylinder of mass m & radius R rolls down inclined plane without slipping. The speed of its C.M. when it reaches the bottom is
A)
\[\sqrt{2gh}\]
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B)
\[\sqrt{4gh/3}\]
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C)
\[\sqrt{3/4gh}\]
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D)
\[\sqrt{4gh}\]
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A nuclear reaction is given by \[{{Z}^{X}}^{^{A}}{{\to }_{Z+1}}Y+-{{1}^{{{e}^{0}}}}+\overline{v},\] represents
A)
fission
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B)
\[\beta \]-decay
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C)
\[\alpha \]-decay
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D)
fusion
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Steam is passed into 22 gm of water at \[20{}^\circ C.\] The mass of water that will be present when the water acquires a temperature of \[90{}^\circ C\] (Latent heat of steam is 540 cal/g) is
A)
24.83 gm
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B)
24 gm
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C)
36.6 gm
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D)
30 gm
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Electromotive force is the force which is able to maintain a constant
A)
potential difference
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B)
power
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C)
resistance
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D)
current
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A prism of refractive index has a refracting angle of \[60{}^\circ .\] At what angle a ray must be incident on it so that it suffers a minimum deviation?
A)
\[45{}^\circ \]
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B)
\[60{}^\circ \]
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C)
\[90{}^\circ \]
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D)
\[180{}^\circ \]
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Select the incorrect statement about Lorentz Force.
A)
In presence of electric field \[\overrightarrow{E}(r)\] and magnetic field \[\overrightarrow{B}(r)\] the force on a moving electric charge is \[\overrightarrow{F}=q[\overrightarrow{E}(r)+v\times \overrightarrow{B}(r)]\]
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B)
The force, due to magnetic field on a negative charge is opposite to that on a positive charge.
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C)
The force due to magnetic field are become zero if velocity and magnetic field are parallel or antiparallel.
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D)
For a static charge the magnetic force is maximum.
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In an AC generator, a coil with N turns, all of the same area A and total resistance R, rotates with frequency\[\omega \]in a magnetic field B. The maximum value of emf generated in the coil is
A)
N A B R\[\omega \]
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B)
N A B
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C)
N A B R
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D)
N A B\[\omega \]
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A diametrical tunnel is dug across the earth. A ball is dropped into the tunnel from one side. The velocity of the ball when it reaches the centre of the earth is (Given : gravitational potential at the centre of earth\[=-\frac{3}{2}\frac{GM}{R})\]
A)
\[\sqrt{R}\]
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B)
\[\sqrt{gR}\]
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C)
\[\sqrt{2.5gR}\]
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D)
\[\sqrt{7.1gR}\]
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A spring of force constant 800 N/m has an extension of 5 cm. The work done in extending it from 5 cm to 15 cm is
A)
16 J
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B)
8 J
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C)
32 J
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D)
24 J
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If it takes 5 minutes to fill a 15 litre bucket from a water tap of diameter \[\frac{2}{\sqrt{\pi }}cm\] then the Reynolds number for the flow is close to (density of water \[={{10}^{3}}kg/{{m}^{3}}\] and viscosity of water \[={{10}^{-3}}Pa.s\]):
A)
1100
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B)
11,000
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C)
550
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D)
5500
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The effective capacitance between the points P and Q of the arrangement shown in the figure is
A)
\[\frac{1}{2}\mu F\]
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B)
\[1\mu F\]
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C)
\[2\mu F\]
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D)
\[1.33\mu F\]
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A glass rod 20 cm long is clamped at the middle. It is set into the longitudinal vibration. If the emitted sound frequency is 4000 Hz, the velocity of sound in glass will be
A)
2800 m/s
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B)
3200 m/s
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C)
1600 m/s
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D)
2000 m/s
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A transistor has an a \[\alpha =0.95,\] then \[\beta \] is equal to
A)
\[\frac{1}{19}\]
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B)
19
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C)
1.5
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D)
0.95
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A coil of circular cross-section having 1000 turns and \[4\,\,c{{m}^{2}}\] face area is placed with its axis parallel to a magnetic field which decreases by \[{{10}^{-2}}\] Wb \[{{m}^{-2}}\] in \[0.01\,\,s.\] The e.m.f. induced in the coil is:
A)
400 mV
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B)
200 Mv
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C)
4 mV
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D)
0.4 mV
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A particle is moving eastwards with a velocity of 5 m/s. hi 10 seconds the velocity changes to 5 m/s northwards. The average acceleration in this time is
A)
\[\frac{1}{2}m{{s}^{-2}}\] North
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B)
\[\frac{1}{\sqrt{2}}m{{s}^{-2}}\] North - East
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C)
\[\frac{1}{\sqrt{2}}m{{s}^{-2}}\] North-West
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D)
zero
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In bringing an electron towards another electron, the electrostatic potential energy of system
A)
increases
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B)
decreases
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C)
becomes zero
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D)
remains unchanged
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Four bulbs \[{{B}_{1}},\]\[{{B}_{2}},\]\[{{B}_{3}}\]and \[{{B}_{4}}\] of 100 W each are connected to 220 V main as shown in the figure.
The reading in an ideal ammeter will be:
A)
0.45 A
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B)
0.90 A
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C)
1.35 A
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D)
1.80 A
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A metal conductor of length 1 m rotates vertically about one of its ends at angular velocity 5 radians per second. If the horizontal component of earth's magnetic field is \[0.2\times {{10}^{-4}}T,\] then the e.m.f. developed between the two ends of the conductor is
A)
\[5\,\,mV\]
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B)
\[50\,\,\mu V\]
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C)
\[5\,\,\mu V\]
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D)
\[50\,\,mV\]
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The observed osmotic pressure for a 0.10 M solution of \[Fe{{(N{{H}_{4}})}_{2}}{{(S{{O}_{4}})}_{2}}\] at \[25{}^\circ C\] is 10.8 atm. The expected and experimental (observed) values of van't Hoff factor (i) will be respectively: \[(R=0.082\,\,L\,\,atm\,\,{{K}^{-1}}\,\,mo{{l}^{-1}})\]
A)
5 and 4.42
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B)
4 and 4.00
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C)
5 and 3.42
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D)
3 and 5.42
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In the Freidel Craft's acylation reaction, the effective electrophile is
A)
\[RCOC{{l}^{+}}\]
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B)
\[AlC{{l}_{3}}\]
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C)
\[RCOCl\]
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D)
\[RC{{O}^{+}}\]
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Match the columns
Column-I Column-II [A] Lanthanide hard as steel, (p) Lu [B] Lanthanide with maximum paramagnetic character in\[L{{n}^{4+}}\] state. (q) Tb [C] Lanthanide with maximum value of \[E{}^\circ \] for reaction\[L{{n}^{3+}}(aq)+3{{e}^{-}}\to Ln(s).\] (r) Sm [D] Lanthanide whose \[L{{n}^{3+}}\]ion is (s) Eu diamagnetic in nature (s) Eu
A)
A\[\to \](r), B\[\to \](s), C\[\to \](p), D\[\to \](q)
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B)
A\[\to \](r), B\[\to \](q), C\[\to \](s), D\[\to \](p)
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C)
A\[\to \](s), B\[\to \](r), C\[\to \](q), D\[\to \](p)
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D)
A\[\to \](r), B\[\to \](s), C\[\to \](q), D\[\to \](p)
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Specific volume of cylindrical virus particle is \[6.02\times {{10}^{-2}}cc/gm.\] whose radius and length \[7\,\,\overset{{}^\circ }{\mathop{A}}\,\] & \[10\,\,\overset{{}^\circ }{\mathop{A}}\,\] respectively If \[{{N}_{A}}=6.02\times {{10}^{23}}mo{{l}^{-1}},\] find molecular weight of virus
A)
\[3.08\times {{10}^{3}}\,kg\text{/}mol\]
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B)
\[3.08\times {{10}^{4}}\,kg\text{/}mol\]
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C)
\[1.54\times {{10}^{4}}\,kg\text{/}mol\]
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D)
\[1.54\,kg\text{/}mol\]
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Arrange the following in increasing order of their acidity? [a] o-cresol, [b] salicyclic acid, [c] phenol
A)
c < a < b
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B)
b < c < a
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C)
a < b < a
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D)
a < c < b
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View Answer play_arrow
Consider the following statements
I. The radius of an anion is larger than that of the parent atom. II. The ionization energy generally increases with increasing atomic number in a period. III. The electronegativity of an element is the tendency of an isolated atom to attract an electron. Which of the above statements is/are correct?
A)
I alone
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B)
II alone
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C)
I and II
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D)
II and III
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\[C{{l}_{2}}\] changes to \[C{{l}^{-}}\] and \[Cl{{O}^{-}}\] in cold NaOH. Equivalent weight of \[C{{l}_{2}}\] will be
A)
\[M\]
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B)
\[\frac{M}{2}\]
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C)
\[\frac{M}{3}\]
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D)
\[\frac{3M}{3}\]
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View Answer play_arrow
Pick out the wrong statement.
A)
Nitrogen has the ability to form \[p\pi -p\pi \] bonds with itself.
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B)
Bismuth forms metallic bonds in elemental state.
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C)
Catenation tendency is higher in nitrogen when compared with other elements of the same group.
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D)
Nitrogen has higher first ionisation enthalpy when compared with other elements of the same group.
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Chlorine cannot displace
A)
fluorine from NaF
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B)
iodine from Nal
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C)
bromine from NaBr
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D)
None of these
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Arrange the following phenols in order of their increasing acidity.
A)
I > III > II
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B)
I > II > III
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C)
III > I > II
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D)
III > II > I
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The average molecular speed is greatest in which of the following gas samples?
A)
1.0 mole of \[{{O}_{2}}\] at 560 K.
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B)
0.50 mole of Ne at 500 K.
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C)
0.20 mole of \[C{{O}_{2}}\] at 440 K.
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D)
2.0 mole of He at 140 K.
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Aniline is an activated system for electrophilic substitution. The compound formed on heating aniline with acetic anhydride is
A)
done
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B)
done
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C)
done
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D)
done
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View Answer play_arrow
The formula mass of Mohr's salt is 392. The iron present in it is oxidised by \[KMn{{O}_{4}}\] in acid medium. The equivalent mass of Mohr's salt is
A)
392
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B)
31.6
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C)
278
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D)
156
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Sewage mostly constitutes :
A)
Non-biodegradable pollutants
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B)
Biodegradable pollutants
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C)
Effluents
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D)
Air pollutants
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The Langmuir adsorption isotherm is deduced using the assumption
A)
the adsorption sites are equivalent in their ability to adsorb the particles.
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B)
the heat of adsorption varies with coverage.
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C)
the adsorbed molecules interact with each other.
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D)
the adsorption takes place in multilayers.
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Which of the following can be repeatedly soften on heating?
(i) Polystyrene (ii) Melamine (iii) Polyesters (iv) Polyethylene (v) Neoprene
A)
(i) and (iii)
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B)
(i) and (iv)
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C)
(iii),(iv) and (v)
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D)
(ii) and (iv)
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View Answer play_arrow
The volume-temperature graphs of a given mass of an ideal gas at constant pressure are shown below.
What is the correct order of pressures?
A)
\[{{p}_{1}}>{{p}_{3}}>{{p}_{2}}\]
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B)
\[{{p}_{1}}>{{p}_{2}}>{{p}_{3}}\]
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C)
\[{{p}_{2}}>{{p}_{3}}>{{p}_{1}}\]
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D)
\[{{p}_{2}}>{{p}_{1}}>{{p}_{3}}\]
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View Answer play_arrow
Which of the following is used for making optical instruments?
A)
\[Si{{O}_{2}}\]
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B)
\[Si\]
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C)
\[Si{{H}_{4}}\]
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D)
\[SiC\]
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View Answer play_arrow
he correct order of acid strength of oxyacids is:
A)
\[HClO>HCl{{O}_{2}}>HCl{{O}_{3}}>HCl{{O}_{4}}\]
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B)
\[HCl{{O}_{2}}>HCl{{O}_{3}}>HClO>HCl{{O}_{4}}\]
done
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C)
\[HCl{{O}_{4}}>HCl{{O}_{3}}>HCl{{O}_{2}}>HClO\]
done
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D)
\[HCl{{O}_{3}}>HCl{{O}_{4}}>HClO>HCl{{O}_{2}}\]
done
clear
View Answer play_arrow
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 ions,\[N{{a}^{+}}\] and carbonate ions, \[CO_{3}^{2-}\] are respectively \[(\]Molar mass of \[N{{a}_{2}}C{{O}_{3}}=106\,g\,mo{{l}^{-1}})\]
A)
0.955 M and 1.910 M
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B)
1.910 M and 0.955 M
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C)
1.90 M and 1.910M
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D)
0.477 M and 0.477 M
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View Answer play_arrow
In which alkyl halide, \[{{S}_{N}}2\] mechanism is favoured maximum?
A)
\[C{{H}_{3}}Cl\]
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B)
\[C{{H}_{3}}C{{H}_{2}}Cl\]
done
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C)
\[{{(C{{H}_{3}})}_{2}}CHCl\]
done
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D)
\[{{(C{{H}_{3}})}_{3}}C-Cl\]
done
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View Answer play_arrow
Equilibrium constant K changes with temperature. At 300 K, equilibrium constant is 25 and at 400 K it is 10. Hence, backward reaction will have energy of activation
A)
equal to that of forward reaction.
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B)
less than that of forward reaction.
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C)
greater than that of forward reaction.
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D)
given values are not sufficient to explain given statement.
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View Answer play_arrow
Which of the two ions from the list given below that have the geometry that is explained by the same hybridization of orbitals, \[N{{O}_{2}}^{-},\] \[N{{O}_{3}}^{-},\]\[N{{H}_{2}},\] \[N{{H}_{4}}^{+},\] \[SC{{N}^{-}}?\]
A)
\[N{{O}_{2}}^{-}\]and\[N{{O}_{3}}^{-}\]
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B)
\[N{{H}_{4}}^{+}\]and\[N{{O}_{3}}^{-}\]
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C)
\[SC{{N}^{-}}\] and \[N{{H}_{2}}^{-}\]
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D)
\[N{{O}_{2}}^{-}\]and\[N{{H}_{2}}^{-}\]
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View Answer play_arrow
A)
done
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B)
done
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C)
done
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D)
done
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View Answer play_arrow
White lead is.
A)
\[P{{b}_{3}}{{O}_{4}}\]
done
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B)
\[PbO\]
done
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C)
\[2PbC{{O}_{3}}.Pb{{(OH)}_{2}}\]
done
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D)
\[Pb{{(C{{H}_{3}}COO)}_{2}}.Pb{{(OH)}_{2}}\]
done
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View Answer play_arrow
The commonest method for the extraction of metals from oxide ores involves:
A)
Reduction with carbon and carbon monoxide
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B)
Reduction with aluminium
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C)
Reduction with hydrogen
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D)
Electrolytic method
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View Answer play_arrow
\[N{{H}_{4}}Cl\] crystallises in a bcc lattice with edge length of unit cell equal to 387 pm. If the radius of the \[C{{l}^{-}}\] ion is 181 pm, the radius of \[\overset{+}{\mathop{N}}\,{{H}_{4}}\] ions is
A)
366.3 pm
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B)
154.1 pm
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C)
92.6 pm
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D)
None of these
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View Answer play_arrow
IUPAC name of \[[Pt{{(N{{H}_{3}})}_{3}}(Br)(N{{O}_{2}})Cl]\] is
A)
Triamminechlorobromonitroplatinum (IV) chloride
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B)
Triamminebromonitrochloroplatinum (IV) chloride
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C)
Triamminebromochloronitroplatinum (IV) chloride
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D)
Triamminenitrochlorobromoplatinum (IV) chloride
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View Answer play_arrow
A molecule M associates in a given solvent according to the equation\[M{{(M)}_{n}}.\] For a certain concentration of M, the van't Hoff factor was found to be 0.9 and the fraction of associated molecules was 0.2. The value of n is:
A)
3
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B)
5
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C)
2
done
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D)
4
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View Answer play_arrow
Which of the following compound will undergo self aldol condensation in the presence of cold dilute alkali?
A)
\[C{{H}_{2}}=CH-CHO\]
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B)
\[CH=C-CHO\]
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C)
\[{{C}_{6}}{{H}_{5}}CHO\]
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D)
\[C{{H}_{3}}C{{H}_{2}}CHO.\]
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View Answer play_arrow
When one mole of an ideal gas is compressed to half its initial volume and simultaneously heated to twice in initial temperature, the change in entropy \[(\Delta S)\] is
A)
\[{{C}_{V}}\,\ln \,2\]
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B)
\[{{C}_{p}}\,\ln \,2\]
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C)
\[R\,\ln \,2\]
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D)
\[({{C}_{V}}-R)\,\ln \,2\]
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View Answer play_arrow
If x is amount of adsorbate and m is amount of adsorbent, which of the following relations is not related to adsorption process?
A)
\[x/m=K(p)\] at very low pressure.
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B)
\[x/m=K{{p}^{\text{l}/n}}\] at inter mediate pressure
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C)
\[\frac{x}{m}=K\] at very high pressure
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D)
\[\frac{x}{m}=p\]
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View Answer play_arrow
For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, \[\Delta U\]and w corresponds to
A)
\[\Delta U<0,\]\[w=0\]
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B)
\[\Delta U<0,\]\[w<0\]
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C)
\[\Delta U>0,\]\[w=0\]
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D)
\[\Delta U>0,\]\[w>0\]
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View Answer play_arrow
Reactivity of hydrogen atoms attached to different carbon atoms in alkanes has the order
A)
Tertiary > Primary > Secondary
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B)
Primary > Secondary > Tertiary
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C)
Both [a] and [b]
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D)
Tertiary > Secondary > Primary.
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View Answer play_arrow
In most cases, for a rise of 10K temperature the rate constant is doubled to triple. This is due to the reason that
A)
collision frequency increases by a factor of 2 to 3.
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B)
fraction of molecules possessing threshold energy increases by a factor of 2 to 3.
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C)
Activation energy is lowered by a factor of 2 to 3.
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D)
none of these
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View Answer play_arrow
The restricted rotation about carbon carbon double bond in 2-butene is due to :
A)
Overlap of one s- and \[s{{p}^{2}}\]-hybridized orbitals.
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B)
Overlap of two \[s{{p}^{2}}\]- hybridized orbitals.
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C)
Overlap of one p-and one \[s{{p}^{2}}\]-hybridized orbitals.
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D)
Sideways overlap of two p-orbitals.
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View Answer play_arrow
Which of the following colligative property can provide molar mass of proteins (or polymers or colloids) with greatest precision?
A)
Osmotic pressure
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B)
Elevation of boiling point
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C)
Depression of freezing point
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D)
Relative lowering of vapour pressure
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View Answer play_arrow
Cyclic hydrocarbon 'A' has all the carbon and hydrogen atoms in a single plane. All the carbon carbon bonds have the same length, less than \[1.54\,\overset{{}^\circ }{\mathop{A}}\,,\] but more than \[1.34\,\overset{{}^\circ }{\mathop{A}}\,.\] The\[C-C-C\] bond angle will be
A)
\[109{}^\circ 28'\]
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B)
\[100{}^\circ \]
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C)
\[180{}^\circ \]
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D)
\[120{}^\circ \]
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View Answer play_arrow
The major product obtained in the photo catalysed bromination of 2-methylbutane is:
A)
1-bromo-2-methylbutane
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B)
1-bromo-3-methylbutane
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C)
2-bromo-3-methylbutane
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D)
2-bromo-2-methylbutane
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View Answer play_arrow
The reason for double helical structure of DNA is the operation of:
A)
Electrostatic attractions
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B)
van der Waals forces
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C)
Dipole - Dipole interactions
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D)
Hydrogen bonding
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View Answer play_arrow
Among the following, correct statement is:
A)
Brownian movement is more pronounced for smaller particles than for bigger- particles.
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B)
Sols of metal sulphides are lyophilic.
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C)
Hardy Schuize law states that bigger the size of the ions, the greater is its coagulating power.
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D)
One would expect charcoal to adsorb chlorine more than hydrogen sulphide.
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View Answer play_arrow
What is the correct order of spin only magnetic moment (in BM) of \[M{{n}^{2+}},\]\[C{{r}^{2+}}\] and \[V{{r}^{2+}}?\]
A)
\[M{{n}^{2+}}>{{V}^{2+}}>C{{r}^{2+}}\]
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B)
\[{{V}^{2+}}>C{{r}^{2+}}>M{{n}^{2+}}\]
done
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C)
\[M{{n}^{2+}}>C{{r}^{2+}}>{{V}^{2+}}\]
done
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D)
\[C{{r}^{2+}}>{{V}^{2+}}>M{{n}^{2+}}\]
done
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View Answer play_arrow
In which of the following cases, pH is greater than 7?
A)
\[50\,mL\,\,\text{of}\,\,0.1\,MHCl+50\,mL\,\,\text{of}\,\,0.1\,M\,NaCl\]
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B)
\[50\,mL\,\text{of}\,\,0.1\,M{{H}_{2}}S{{O}_{4}}+50\,mL\,\text{of}\,0.2\,M\,NaOH\]
done
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C)
\[50\,mL\,\text{of}\,\,0.1\,MC{{H}_{3}}COOH+50\,mL\,\text{of}\,0.1\,M\,KOH\]
done
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D)
\[50\,mL\,\text{of}\,\,0.1\,MHN{{O}_{3}}+50\,mL\,\text{of}\,\,0.1\,M\,N{{H}_{3}}\]
done
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View Answer play_arrow
In the presence of platinum catalyst, hydrocarbon A adds hydrogen to form n-hexane. When hydrogen bromide is added to A instead of hydrogen, only a single bromo compound is formed. Which of the following is A?
A)
\[C{{H}_{3}}-C{{H}_{2}}-CH=CH-C{{H}_{2}}-C{{H}_{3}}\]
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B)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-CH=CH-C{{H}_{3}}\]
done
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C)
\[C{{H}_{3}}-CH=CH-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\]
done
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D)
\[C{{H}_{2}}=CH-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\]
done
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View Answer play_arrow
Which of the following statements are correct?
(i) Polynuclear hydrocarbons contain two or more benzene rings fused together. (ii) Polynuclear hydrocarbons have carcinogenic property. (iii) Polynuclear hydrocarbons are formed on incomplete combustion of organic materials like tobacco, coal and petroleum. (iv) They are also produced in human body due to various biochemical reactions.
A)
(i), (ii) and (iv)
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B)
(i), (iii) and (iv)
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C)
(ii), (iii) and (iv)
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D)
(i), (ii) and (iii)
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View Answer play_arrow
Most plants are green in colour because
A)
the atmosphere filters out all the colours of the visible light spectrum except green.
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B)
green light is the most effective wavelength region of the visible spectrum in sunlight for photosynthesis.
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C)
chlorophyll is least effective in absorbing green light.
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D)
green light allows maximum photosynthesis.
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View Answer play_arrow
Which of the following organism possesses characteristics of both a plant and an animal?
A)
Bacteria
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B)
Euglena
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C)
Mycoplasma
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D)
Paramecium
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View Answer play_arrow
Function of companion cells is
A)
providing energy to sieve elements for active transport.
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B)
providing water to phloem.
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C)
loading of sucrose into sieve elements by passive transport.
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D)
loading of sucrose into sieve elements.
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View Answer play_arrow
In cell cycle, DNA replication takes place in
A)
\[{{G}_{1}}\]phase
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B)
\[{{G}_{2}}\]phase
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C)
mitotic metaphase
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D)
S phase
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View Answer play_arrow
Select the events that do not occur in interphase stage of cell-cycle
(i) RNA and protein synthesis. (ii) Cytoplasmic growth. (iii) Polymerisation of spindle fibres protein. (iv) Disappearance of Golgi bodies and ER. (v) DNA molecules in highly supercoiled stage.
A)
(iii), (iv) & (v)
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B)
(iv) & (v) only
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C)
(ii), (iii) & (iv)
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D)
(iii) & (iv) only
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View Answer play_arrow
Organisms which are indicator of \[S{{O}_{2}}\] pollution of air are
A)
Mosses
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B)
Lichens
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C)
Mushrooms
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D)
Puffballs
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View Answer play_arrow
Choose the correct option for A, B, C and D of a mature embryo sac.
A)
A-Filiform apparatus; B-Antipodal cells; C-Synergids; D - Polar nuclei
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B)
A-Antipodal cells; B-Filiform apparatus; C- Synergids; D-Polar nuclei
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C)
A-Antipodal cells; B-Filiform apparatus; C- Polar nuclei; D-Synergids
done
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D)
A-Antipodal cells; B-Polar nuclei; C-Filiform apparatus; D-Synergids
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View Answer play_arrow
In which one pair both the plants can be vegetative propagated by leaf pieces?
A)
Bryophyllum and Kalanchoe
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B)
Chrysanthemum and Agave
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C)
Agave and Kalanchoe
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D)
Asparagus and Bryophyllum
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View Answer play_arrow
A typical angiospermous ovule is attached to the placenta by means of a stalk called X. Body of the ovule fuses with X in the region called Y. Identify X and Y.
A)
X - Funicle Y - Hihim
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B)
X - Hilum Y - Funicle
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C)
X - Funicle Y - Micropyle
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D)
X - Hilum Y - Chalaza
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View Answer play_arrow
The greatest threat to global biodiversity is
A)
natural disasters such as storms
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B)
pollution
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C)
overexploitation of natural resources
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D)
alteration of habitats by humans
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View Answer play_arrow
Secondary sewage treatment is mainly a
A)
physical process
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B)
mechanical process
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C)
chemical process
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D)
biological process
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View Answer play_arrow
Species interaction with negative influence on both is referred to as
A)
amensalism
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B)
mutualism
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C)
commensalism
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D)
competition
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View Answer play_arrow
Cotyledons and testa respectively are edible parts in
A)
walnut and tamarind
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B)
french bean and coconut
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C)
cashew nut and litchi
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D)
groundnut and pomegranate
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View Answer play_arrow
When pollen grains are not transferred from anthers to stigma in a flower, due to the barrier, it is called
A)
herkogamy
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B)
heterogamy
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C)
cleistogamy
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D)
dichogamy
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View Answer play_arrow
Water potential is equal to
A)
\[\Psi +O.P.\]
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B)
\[{{\Psi }_{s}}+O.P.\]
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C)
\[{{\Psi }_{p}}+{{\Psi }_{w}}\]
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D)
\[{{\Psi }_{s}}+{{\Psi }_{p}}\]
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View Answer play_arrow
Which of the following is a free living aerobic non-photosynthetic nitrogen-fixer?
A)
Rhizobium
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B)
Azotobacter
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C)
Azospirillum
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D)
Nostoc
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View Answer play_arrow
What kinds of the structures of proteins are shown in the following figure?
A)
\[A=1{}^\circ \] structure, \[B=2{}^\circ \] structure, \[C=3{}^\circ \] structure, \[D=4{}^\circ \] structure
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B)
\[A=4{}^\circ \] structure, \[B=2{}^\circ \] structure, \[C=3{}^\circ \] structure, \[D=2{}^\circ \] structure
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C)
\[A=1{}^\circ \] structure, \[B=4{}^\circ \] structure, \[C=3{}^\circ \] structure, \[D=2{}^\circ \] structure
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D)
\[A=4{}^\circ \] structure, \[B=3{}^\circ \] structure, \[C=2{}^\circ \] structure, \[D=1{}^\circ \] structure
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View Answer play_arrow
In soil, the water available for root absorption is
A)
gravitational water
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B)
capillary water
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C)
hygroscopic water
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D)
combined water
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View Answer play_arrow
Which of the following minerals activate the enzymes involved in respiration?
A)
nitrogen and phosphorus
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B)
magnesium and manganese
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C)
potassium and calcium
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D)
sulphur and iron
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View Answer play_arrow
\[{{C}_{4}}\] acid, formed in the mesophyll of \[{{C}_{4}}\] plants leaf during photosynthesis is
A)
OAA or malic acid or aspartic acid
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B)
pyruvic acid
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C)
succinic acid
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D)
fumaric acid
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View Answer play_arrow
AzotobacterandBeijerinckia are the examples of
A)
symbiotic nitrogen-fixers
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B)
non-symbiotic nitrogen-fixers
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C)
ammonifying bacteria
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D)
disease causing bacteria
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View Answer play_arrow
The first carbon dioxide acceptor in \[{{C}_{4}}\]-plants is
A)
Phosphoenol-pyruvate
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B)
Ribulose 1, 5-diphosphate
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C)
Qxalo-acetic acid
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D)
Phosphoglyceric acid
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View Answer play_arrow
Select the incorrect statement regarding DNA replication
A)
Leading strand is formed in \[5'\to 3'\] direction
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B)
Okazaki fragments are formed in \[5'\to 3'\] direction
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C)
DNA polymerase catalyses polymerization in \[5'\to 3'\] direction
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D)
DNA polymerase catalyses polymerization in \[3'\to 5'\] direction
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View Answer play_arrow
Red (RR) Antirrhinum is crossed with white (WW) one. Offspring RW are pink. This is an example of
A)
dominant-recessive
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B)
incomplete dominance
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C)
hybrid
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D)
supplementary genes
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View Answer play_arrow
Food chain in which micro-organisms breakdown the food formed by primary producers is
A)
parasitic food chain
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B)
detritus food chain
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C)
consumer food chain
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D)
predator food chain
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View Answer play_arrow
Which of the following pairs is a sedimentary type of biogeochemical cycle?
A)
Oxygen and nitrogen
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B)
Phosphorus and sulphur
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C)
Phosphorus and nitrogen
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D)
Phosphorus and carbon dioxide
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View Answer play_arrow
Independent assortment of genes does not take place when
A)
genes are located on homologous chromosomes
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B)
genes are linked and located on same chromosomes
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C)
genes are located on non-homologous chromosomes
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D)
All the above
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View Answer play_arrow
Breeding of crops with high levels of minerals, vitamins and proteins is called
A)
Somatic hybridization
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B)
Biofortification
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C)
Biomagnification
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D)
Micropropagation
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View Answer play_arrow
If we completely remove the decomposers from an ecosystem, its functioning will be adversely affected, because
A)
energy flow will be blocked
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B)
herbivores will not receive solar energy
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C)
mineral movement will be blocked
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D)
rate of decomposition will be very high
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View Answer play_arrow
A nucleotide is formed of
A)
Purine, pyrimidine and phosphate
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B)
Purine, sugar and phosphate
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C)
Nitrogen base, sugar and phosphate
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D)
Pyrimidine, sugar and phosphate
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View Answer play_arrow
Which of the following hormones are responsible for maintaining bud dormancy in deciduous trees?
A)
Auxins
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B)
Cytokinins
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C)
Gibberellins
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D)
Abscisic acid
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View Answer play_arrow
A small segment of DNA contains the base sequence CGT. If an mRNA transcript is made that includes this DNA sequence, what will be the anticodon on the tRNA that will bind to the corresponding mRNA codon for this DNA triplet?
A)
CGT
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B)
GCA
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C)
CGU
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D)
GCT
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View Answer play_arrow
Which of the following is a reducing sugar?
A)
Galactose
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B)
Gluconic acid
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C)
P-methyl galactoside
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D)
Sucrose
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View Answer play_arrow
Which of the following processes make direct use of oxygen?
A)
Glycolysis
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B)
Fermentation
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C)
Electron transport
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D)
Krebs cycle
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View Answer play_arrow
Phosphofructokinase is inhibited by \[{{H}^{+}}\] ions and hence the rate of glycolysis:
A)
increases when pH falls
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B)
decreases when pH falls significantly
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C)
neither increase or decrease
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D)
either increase or decrease
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View Answer play_arrow
Which one of the following is incorrect about the activities associated with PS-I and PS-II in non-cyclic photophospho-rylation?
A)
Water is oxidised in PS-II, but not in PS-I.
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B)
Photons (light) are needed to activate both PS-I and PS-II.
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C)
Photolysis of water, formation of ATP + NADPH+H occur.
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D)
Production of NADPH + \[{{H}^{+}}\] is associated with PS-II, but not with PS-I.
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View Answer play_arrow
Wildlife is destroyed most when
A)
there is lack of proper care
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B)
mass scale hunting for foreign trade
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C)
its natural habitat is destroyed
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D)
natural calamity occurs
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View Answer play_arrow
Golden rice is a transgenic crop of the future with the following improved trait:
A)
insect resistance
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B)
high lysine (essential amino acid) content
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C)
high protein content
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D)
high vitamin-A content
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View Answer play_arrow
Which of the following could not be considered an ecosystem?
A)
A small pond
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B)
All the fish in a coral reef
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C)
Earth
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D)
A pile of dung in a pasture
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View Answer play_arrow
A common biucontrol agcni for the control of plant diseases is
A)
Baculovirus
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B)
Bacillus thuringiensis
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C)
Glomus
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D)
Trichoderma
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View Answer play_arrow
Which of the following is not caused by deficiency of mineral nutrition -
A)
Necrosis
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B)
Etiolation
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C)
Chlorosis
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D)
Shortening of intern odes.
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View Answer play_arrow
A number of natural reserves have been created to conserve specific wild life species. Identify the correct combination from the following
A)
Gir Forest - Tiger
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B)
Kaziranga - Elephants
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C)
Rann of Kutch - Wild Ass
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D)
Manas wild life Sancturay - Musk deer
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View Answer play_arrow
PCR and Restriction Fragment Length Polymorphism are the methods for:
A)
Study of enzymes
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B)
Genetic transformation
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C)
DNA sequencing
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D)
Genetic Fingerprinting
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The \[{{C}_{4}}\] plants are photosynthetically more efficient than \[{{C}_{3}}\] plants because:
A)
the \[C{{O}_{2}}\] compensation point is more
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B)
\[C{{O}_{2}}\] generated during photorespiration is trapped and recycled through PEP carboxylase
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C)
the \[C{{O}_{2}}\] efflux is not prevented
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D)
they have more chloroplasts
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The enormous diversity of protein molecules is due mainly to the diversity of
A)
amino groups on the amino acids
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B)
R groups on the amino acids
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C)
amino acid sequences within the protein molecule
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D)
peptide bonds
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A tooth scraping yields large numbers of corkscrew shaped bacteria. These bacteria are referred to as
A)
Bacilli
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B)
Cocci
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C)
Spirffli
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D)
Helici
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Which of the following class is being correctly described by given statements (i - iv)?
(i) All living members of this class are ectoparasites on some fishes, (ii) They have a sucking and circular mouth without jaws. (iii) Circulation is of closed type. (iv) They are marine but migrate for spawning to fresh water. After spawing, within a few days they die.
A)
Cyclostomata
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B)
Chondrichthyes
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C)
Osteichthyes
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D)
Amphibia
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Intercalated discs are the communication junctions between the cells of
A)
cardiac muscles
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B)
striped muscles
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C)
adipose tissue
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D)
nerve and striated muscles
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In which of the phylum, excretory organ like proboscis gland is present?
A)
Hemichordata
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B)
Chordata
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C)
Echinodermata
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D)
Annelida
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Pseudostratified epithelium is found in
A)
oesophagus
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B)
respiratory tract
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C)
urinary tract
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D)
kidney
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Male and female cockroaches can be distinguished externally through
A)
anal styles in male
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B)
anal cerci in female
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C)
anal style and antennae in females
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D)
Both [b] and [c]
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Nerve cells do not divide because they do not have
A)
nucleus
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B)
centrosome
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C)
golgi body
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D)
mitochondria
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Which of the following is not currently a major cause of the global reduction in biodiversity?
A)
Overexploitation
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B)
Global warming
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C)
Habitat destruction
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D)
Introduction of foreign predators and disease
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Human population growth in India
A)
tends to follow a sigmoid curve as in case of many other animal species
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B)
tends to reach a zero population growth as in case of some animal species
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C)
can be reduced by permitting natural calamities and enforcing birth control measures
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D)
can be regulated by following the national programme of family planning
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The diaphragm, cervical cap and vaults are
A)
Disposable contraceptive devices
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B)
Reusable contraceptives
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C)
lUDs
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D)
Implants
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The main function of trophoectoderm in mammalian embryo is
A)
formation of future endoderm
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B)
formation of the body of developing embryo
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C)
formation of future ectoderm
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D)
formation of placenta
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Following diagrammatic representation refers the natural selection on different traits. In which all the three graphs A, B and C are identified correctly
A)
A-Directional, B-Stabilising, C-Disruptive
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B)
A-Stabilising, B-Directional, C-Disruptive
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C)
A-Stabilising, B-Disruptive, C-Directional
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D)
A-Directional, B-Disruptive, C-Stabilising
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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
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B)
The sperm lysis in the acrosome dissolve the egg envelope facilitating fertilization
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C)
Acrosome serves as a sensory structure leading the sperm towards the ovum
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D)
Acrosome serves no particular function
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Bulbourethral gland is present in
A)
Males and is another name for Uterus masculine
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B)
Females and is another name for Bertholin's gland
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C)
Males and is another name for Cowper's gland
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D)
None of these
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One of the factors required for the maturation of the erythrocytes is
A)
vitamin A
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B)
vitamin D
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C)
vitamin \[{{B}_{12}}\]
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D)
vitamin C
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In which of the following would you record the highest blood pressure?
A)
The ventricle supplying blood to the gills of a fish
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B)
The anterior dorsal artery of an ant
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C)
The pulmonary vein of a frog
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D)
The ventricle supplying blood to the systemic circuit of a bird
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Oxyntic cells are located in
A)
Islets of Langerhans
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B)
Gastric epithelium and secrete pepsin
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C)
Kidneys and secrete renin
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D)
Gastric epithelium and secrete HCl
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If Henle's loop were absent from mammalian nephron which of the following is to be expected?
A)
The urine will be more concentrated
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B)
The urine will be more dilute
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C)
There will be no urine formation
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D)
There will be hardly any change in the quality and quantity of urine formed
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Hepatic portal system carries
A)
Oxygenated blood from liver to intestine
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B)
Deoxygenated blood from liver to intestine
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C)
Oxygenated blood from intestine to liver
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D)
Deoxygenated blood from intestine to liver
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"Kwashiorkor' and 'Beri-Beri' are
A)
communicable diseases
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B)
infectious diseases
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C)
deficiency diseases
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D)
None of the above
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ABO blood group system is due to
A)
multifactor inheritance
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B)
incomplete dominance
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C)
multiple allelism
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D)
epi stasis
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Change over time within an evolutionary lineage (phyletic change).
A)
is the only important evolutionary process.
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B)
rarely occurs without geographic separation of populations.
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C)
is the main means by which new species arise.
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D)
cannot account for the proliferation of species.
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Bull semen for the purpose of artificial insemination is stored in
A)
Ice
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B)
Liquid oxygen
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C)
Liquid nitrogen
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D)
Liquid \[C{{O}_{2}}\]
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The kind of evolution in which two species of different geneology come to resemble one another closely, is termed as
A)
progressive evolution
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B)
convergent evolution
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C)
parallel evolution
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D)
retrogressive evolution
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Drosophila flies with XXY genotype are females, but human beings with such genotype are abnormal males. It shows that
A)
Y-chromosome is essential for sex determination in Drosophila.
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B)
Y-chromosome is female determinant in Drosophila.
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C)
Y-chromosome is male determination in human beings.
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D)
Y-chromosome has no role in sex determination either in Drosophila or in human beings.
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Hinny is a hybrid of male
A)
Horse and female donkey
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B)
Donkey and female horse
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C)
Goat and female lamb
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D)
Sheep and female goat.
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Which of the following is the first step in allopatric speciation?
A)
genetic drift
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B)
geographical isolation
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C)
polyploidy
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D)
hybridization
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When \[C{{O}_{2}}\] concentration in blood increases, breathing becomes
A)
shallower and slow
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B)
there is no effect on breathing
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C)
slow and deep
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D)
faster and deeper
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Identify A, B, C and D
A)
A-Forebrain, B-Brainstem, C-Corpus callosum, D-Cerebral aqueduct
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B)
A-Forebrain, B-Brainstem, C-Cerebral aqueduct, D-Corpus callosum
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C)
A-Brainstem, B-Forebrain, C-Corpus callosum, D-Cerebral aqueduct
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D)
A-Brainstem, B-Forebrain, C-Cerebral aqueduct, D-Corpus luteum
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Which of the following is a single U shaped bone, present at the base of the buccal cavity and it is also included in the skull?
A)
Hyoid
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B)
Malleus
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C)
Sacrum
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D)
Scapula
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Which of the following would be most likely to help to slow down the greenhouse effect?
A)
Ensuring that all excess paper packaging is burned to ashes.
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B)
Promoting the use of private rather than public transport.
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C)
Converting tropical forests into grazing land for cattle.
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D)
Re-designing land-fill dumps to allow methane to be collected.
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Which gland is involved in the fanction of our ?biological clock"?
A)
pineal gland
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B)
thyroid gland
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C)
adrenal glands
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D)
ovaries
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Which of the following statements regarding glucagon is false?
A)
It is secreted by a-cells of Langerhans.
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B)
It acts antagonistically to insulin.
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C)
It decreases blood sugar level.
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D)
The gland responsible for its secretion is heterocrine gland.
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Which hormone possesses anti-insulin effect?
A)
Cortisol
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B)
Calcitonin
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C)
Qxytocin
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D)
Aldosterone
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Which is the example of conditioned reflex?
A)
Eyes closed when anything enter into it.
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B)
Hand took up when piercing with needle.
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C)
Salivation in a hungry dog in response to ringing of a bell.
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D)
Digestion food goes forward in alimentary canal.
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Which one of the following techniques made it possible to genetically engineerd living organism?
A)
Recombinant DNA techniques
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B)
X-ray diffraction
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C)
Heavier isotope labelling
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D)
Hybridization
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The diagram opposite shows a homologous (bivalent) pair of chromosomes during meiosis.
Which of the following correctly represents the final products of the second meiotic division?
A)
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B)
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C)
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D)
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Which of the following is the "bird flu virus"?
A)
\[{{H}_{5}}{{N}_{1}}\]
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B)
Haemophilus influenza
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C)
HTV
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D)
Rhino virus
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What is mode of bacterial resistance against antibiotics?
A)
Development of thick mucilaginous layer
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B)
Alteration of cell membrane
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C)
Mutation in bacteria
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D)
All the above
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Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct ?
A)
Yeast - statins
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B)
Acetobacter aceti - acetic acid
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C)
Clostridium butylicum - lactic acid
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D)
Aspergillus niger - citric acid
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Interleukins are responsible for activation of
A)
Cell mediated immunity
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B)
Humoral immunity
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C)
BothNone
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D)
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Select the correct statement with respect to diseases and immunisation?
A)
If due to some reason B-and T-lymphocytes are damaged, the body will not produce antibodies against a pathogen
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B)
Injection of dead / inactivated pathogens causes passive immunity
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C)
Certain protozoans have been used to mass produce hepatitis B vaccine.
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D)
Injection of snake antivenom against snake bite is an example of active immunization
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The simplest amino acid is ______.
A)
glycine
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B)
proline
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C)
leucine
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D)
tryptophan
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Which one of the following is the correct matching of three items and their grouping category?
A)
Items - Ilium, ischium, pubis Group - coxal bones of pelvic girdle
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B)
Items - Actin, myosin, rhodopsin. Group - muscle proteins
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C)
Items - Cytosine, uracil, thiamine Group - Pyrimidines
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D)
Items - Malleus, incus, cochlea Group - ear ossicles
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What is the first step in the Southern blot technique?
A)
Denaturation of DNA on the gel for hybridization with specific probe.
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B)
Production of a group of genetically identical cells.
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C)
Digestion of DNA by restriction enzyme.
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D)
Denaturation of DNA from a nucleated cell such as the one from the scene of crime.
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