The Van der Waal equation for n moles of a real gas is\[\left( p+\frac{a}{{{V}^{2}}} \right)(V-b)=nRT\]. Where P is the pressure, V is the volume. T is the absolute temperature. R is the molar gas constant and a and b are Van der Waal constant. The dimensions of a are the same as those of
A)
PV
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B)
\[P{{V}^{2}}\]
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C)
\[{{P}^{2}}V\]
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D)
\[\frac{P}{V}\]
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A particle of mass m is resting on a wedge of angle \[\theta \] as shown in the figure. The wedge is given an acceleration a. What is the value of a so that the mass m just falls freely?
A)
g
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B)
\[g\,\cot \,\theta \]
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C)
\[g\,\sin \theta \]
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D)
\[g\,\tan \,\theta \]
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Rain is falling vertically downwards with a velocity of 3 km/h. A man walks in the rain with a velocity of 4 km/h. The raindrops will fall on the man with a velocity of:
A)
1 km/h
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B)
3 km/h
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C)
4 km/h
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D)
\[5\,km/h\]
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A projectile is given an initial velocity of \[\hat{i}+2\hat{j}.\] The Cartesian equation of its path is: (\[g=10\,m/{{s}^{2}}\])
A)
\[~y=2x-5{{x}^{2}}\]
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B)
\[~y=x-5{{x}^{2}}\]
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C)
\[~4y=2x-5{{x}^{2}}\]
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D)
\[~y=2x-25{{x}^{2}}\]
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The potential energy of a certain spring when stretched through a distance S is 10 joule. The amount of work (in joule) that must be done on this spring to stretch it through an additional distance S will be
A)
30
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B)
40
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C)
10
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D)
20
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A frictionless track ABCDE ends in a circular loop of radius R. A body slides down the track from point A, which is at a height \[h=5\,cm.\]Maximum value of R for the body to successfully complete the loop is
A)
5 cm
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B)
\[\frac{15}{4}\,cm\]
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C)
\[\frac{10}{3}\,cm\]
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D)
\[2\,cm\]
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A body of mass 4 kg moving with velocity 12 m/s collides with another body of mass 6 kg at rest. If the two bodies stick together after collision, then the loss of kinetic energy of the system is
A)
0
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B)
288 J
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C)
172.8 J
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D)
144 J
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Pressure versus temperature graph of an ideal gas is as shown in the figure. Density of the gas at point A is \[{{\rho }_{0}}.\]Density at point B will be:
A)
\[\frac{3}{4{{\rho }_{0}}}\]
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B)
\[\frac{3}{2{{\rho }_{0}}}\]
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C)
\[\frac{4}{3{{\rho }_{0}}}\]
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D)
\[2{{\rho }_{0}}\]
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Equal volume of monoatomic and diatomic gases at the same temperature are given equal quantities of heat. Then:
A)
the temperature of diatomic gas will be more.
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B)
the temperature of monoatomic gas will be more.
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C)
the temperature of both will be zero.
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D)
nothing can be said.
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70 calories of heat are required to raise the temperature of 2 moles of an ideal gas at constant pressure from \[30{}^\circ C\] to \[35{}^\circ C\]. The amount of heat required (in calories) to raise the temperature of the same gas through the same range (\[30{}^\circ C\] to \[35{}^\circ C\]) at constant volume is
A)
30
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B)
50
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C)
70
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D)
90
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A spherical black body with a radius of 12 cm radiates 450 W power of 500 K. If the radius were half and temperature doubled, the power radiated in watt would be
A)
225
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B)
450
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C)
900
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D)
1800
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There are two hollow concentric spheres with radii \[{{R}_{1}}\]and R for the inner and outer spheres respectively. The inner sphere is given a charge \[{{Q}_{1}}\]and the outer a charge\[{{Q}_{2}}.\]Then the potential at the surface of the inner sphere is
A)
\[\frac{1}{4\pi {{\varepsilon }_{0}}}\left( \frac{{{Q}_{1}}}{{{R}_{1}}}+\frac{{{Q}_{2}}}{{{R}_{2}}} \right)\]
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B)
\[\frac{1}{4\pi {{\varepsilon }_{0}}}\left( \frac{{{Q}_{1}}}{{{R}_{1}}}-\frac{{{Q}_{2}}}{{{R}_{2}}} \right)\]
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C)
\[\frac{1}{4\pi {{\varepsilon }_{0}}}\left( \frac{{{Q}_{1}}}{{{R}_{1}}} \right)\]
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D)
0
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The electric field in a region is given by E\[E=\frac{3}{5}{{E}_{0}}i+\frac{4}{5}{{E}_{0}}j\]with\[{{E}_{0}}=2.0\times {{10}^{3}}N/C.\] The flux of this field through a rectangular surface area of \[0.2\,{{m}^{2}}\]parallel to the Y-Z plane is
A)
\[60\,N{{m}^{2}}/C\]
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B)
\[120\,N{{m}^{2}}/C\]
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C)
\[180\,N{{m}^{2}}/C\]
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D)
\[240\,N{{m}^{2}}/C\]
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Consider the situation shown in the figure. The capacitor A has a charge q on it whereas B is uncharged, The charge appearing on the capacitor B a long time after the switch is closed is
A)
0
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B)
\[\frac{q}{2}\]
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C)
q
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D)
2q
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A rectangular loop carrying a current I is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and is in the plane of the loop. If a steady current / is established in the wire as shown in the figure, the loop will:
A)
rotate about an axis parallel to the wire.
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B)
move away from the wire.
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C)
move towards the wire.
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D)
remain stationary.
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An electron of mass m is accelerated through a potential difference of V and then it enters a magnetic field of induction B normal to the lines. Then, the radius of the circular path is:
A)
\[\sqrt{(2\,eV/m)}\]
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B)
\[\sqrt{(2Vm/e{{B}^{2}})}\]
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C)
\[\sqrt{(2Vm/eB)}\]
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D)
\[\sqrt{(2Vm/{{e}^{2}}B)}\]
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An electron moves along the line AB, which lies in the same plane as that of a circular loop of conducting wire as shown in the figure. What will be the direction of the current induced if any in the loop?
A)
No current will be induced.
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B)
The current will be clockwise.
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C)
The current will be anticlockwise.
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D)
The current will change direction as the electron passes by.
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A square coil ABCD is lying in the \[x-y\]plane with its centre at origin. A long straight passing through origin carries a current \[i=2t\]It in negative z-direction. The induced current in the coil
A)
clockwise
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B)
anticlockwise
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C)
alternating
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D)
0
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A spherical drop of water has radius 1 mm. If surface tension of water is \[70\times {{10}^{-3}}N/m\]then the difference of pressures between the inside and outside of the spherical drop is:
A)
\[~35N/{{m}^{-2}}\]
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B)
\[~70\text{ }N/{{m}^{2}}\]
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C)
\[~140\text{ }N/{{m}^{2}}\]
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D)
0
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When at rest, a liquid stands at the same level in the tubes shown in the figure. But as indicated a height difference h occurs when the system is given an acceleration a towards the right. Here h is equal to:
A)
\[\frac{aL}{2g}\]
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B)
\[\frac{gL}{2a}\]
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C)
\[\frac{gL}{a}\]
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D)
\[\frac{aL}{g}\]
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In a metre bridge with standard resistance of\[5\Omega \]. In the left gap, the ratio of balancing lengths of metre bridge wire is 2:3. The unknown resistance is:
A)
\[10\Omega \]
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B)
\[15\Omega \]
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C)
\[10\Omega \]
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D)
\[3.3\Omega \]
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E)
\[7.5\Omega \]
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Maximum power developed across variable resistance R in the circuit shown in the figure is
A)
50 watt
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B)
75 watt
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C)
25 watt
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D)
100 watt
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A man measures time period of a pendulum (T) in stationary lift. If the lift moves upwards with acceleration g/4, then the new time period will be:
A)
\[\frac{2T}{\sqrt{5}}\]
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B)
\[\left( \frac{\sqrt{5T}}{2} \right)\]
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C)
\[\frac{\sqrt{5}}{(2T)}\]
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D)
\[\frac{2}{\sqrt{5T}}\]
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A luminous object is placed at a distance of 30 cm from a convex lens of focal length 20 cm. At what distance from the lens, on the other side, must a convex mirror of radius of curvature 10 cm be placed, in order to have an upright image of the object coincident with it?
A)
12 cm
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B)
30 cm
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C)
50 cm
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D)
60 cm
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A concave lens forms the image of an object such that the distance between the object and the image is 10 cm and the magnification produced is 1/4. The focal length of the lens is:
A)
8.6 cm
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B)
6.2 cm
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C)
10 cm
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D)
4.4 cm
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If two waves of same frequency and same amplitude respectively, on superposition, produce a resultant disturbance of the same amplitude, the waves differ in phase by:
A)
\[\pi \]
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B)
\[\frac{2\pi }{3}\]
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C)
\[\frac{2\pi }{3}\]
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D)
\[3\pi \]
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The light waves from two independent monochromatic light sources are given by: \[{{y}_{1}}=2\,\sin \omega t\]and \[{{y}_{2}}=3\,\cos \omega t.\]Then the correct statement is:
A)
Both the waves are coherent
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B)
Both the waves are incoherent
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C)
Both the waves have different time periods
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D)
None of the above
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When a beam of accelerated electrons hits a target a continuous X-ray spectrum is emitted from the target. Which one of the following wavelength is absent in the X-ray spectrum if the X-ray tube is operating at 40,000 volt?
A)
\[1.5\overset{\text{o}}{\mathop{\text{A}}}\,\]
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B)
\[~0.5\text{ }\overset{\text{o}}{\mathop{\text{A}}}\,\]
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C)
\[0.25\overset{\text{o}}{\mathop{\text{A}}}\,\]
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D)
\[1.0\overset{\text{o}}{\mathop{\text{A}}}\,\]
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A freshly prepared radioactive source of half life 2 hr emits radiation of intensity, which is 64 times the permissible safe level. The minimum time after which it would be possible to work safely with this source is
A)
6 hr
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B)
12 hr
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C)
42 hr
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D)
128 hr
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Given that a photon of light of wavelength 10,000 angstrom has an energy equal to 1.23 eV. When light of wavelength 5000 angstrom and intensity\[{{I}_{0}}\] falls on a photoelectric cell, the saturation current is\[0.40\times {{10}^{-6}}\]ampere and the stopping potential is volt; then the work function is:
A)
0.43 eV
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B)
1.10 eV
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C)
1.36 eV
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D)
2.47 eV
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The de Broglie wavelength of an electron moving with a velocity \[1.5\times {{10}^{8}}m\,{{s}^{-1}}\]is equal to that of a photon. The ratio of the kinetic energy of the electron to that of the photon is
A)
2
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B)
4
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C)
\[\frac{1}{2}\]
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D)
\[\frac{1}{4}\]
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The angular momentum of an electron in an orbit is quantized because it is a necessary condition for the compatibility with
A)
the wave nature of electron.
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B)
particle nature of electron.
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C)
Palli's exclusion behavior
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D)
None of these
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An LCR circuit contains resistance of 100 ohm and a supply of 200 volt at 300 radian angular frequency. If only capacitance is taken out from the circuit and the rest of the circuit is joined, current lags behind the voltage by \[60{}^\circ \]. If on the other hand, only inductor is taken out the current leads by \[60{}^\circ \] with the applied voltage. The current flowing in the circuit is:
A)
1 amp
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B)
1.5 amp
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C)
2 amp
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D)
2.5 amp
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Zener diode functions in:
A)
forward biased condition
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B)
reverse biased condition
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C)
both forward and reverse biased conditions
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D)
none of the above
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An artificial satellite is moving in a circular orbit around the earth with a speed equal to the escape velocity from the earth of radius R. What is the height of the satellite above the surface of the earth?
A)
\[\frac{R}{2}\]
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B)
R
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C)
3R
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D)
6R
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If the system is released, then the acceleration of the centre of mass of the system (as shown in the figure) is:
A)
\[\frac{g}{4}\]
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B)
\[\frac{g}{2}\]
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C)
\[g\]
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D)
\[2g\]
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The upper half of an inclined plane with inclination\[\phi \] is perfectly smooth, while the lower half is rough. A body starting from rest at the top will again come to rest at the bottom if coefficient of friction for the lower half is given by
A)
\[2\sin \phi \]
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B)
\[2\cos \phi \]
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C)
\[2\tan \phi \]
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D)
\[\tan \phi \]
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Three thin rods each of length L and mass M are placed along\[X,Y,\]and Z-axes in such a way that one end of each of the rods is at the origin. The moment of inertia of this system about Z-axis is:
A)
\[~2\text{ }M{{L}^{2}}/3\]
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B)
\[~4\text{ }M{{L}^{2}}/3\]
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C)
\[~5\text{ }M{{L}^{2}}/3\]
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D)
\[~M{{L}^{2}}/3\]
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A thin circular ring of mass M and radius R is rotating about its axis with a constant angular velocity\[\omega \]. Two objects each of mass m, are attached gently to the opposite ends of a diameter of the ring. The ring now rotates with an angular velocity
A)
\[\frac{\omega M}{M+m}\]
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B)
\[\frac{\omega (M-2m)}{M+2m}\]
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C)
\[\frac{\omega M}{M+2m}\]
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D)
\[\frac{\omega (M+2m)}{M}\]
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The bob of a simple pendulum is hanging vertically down from a fixed identical bob by means of a string of length\[l.\] If both bobs are charged with a charge q each, time period of the pendulum is: (ignore the radii of the bobs)
A)
\[2\pi \sqrt{\frac{\ell }{g+\sqrt{\frac{{{q}^{2}}}{{{\ell }^{2}}m}}}}\]
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B)
\[2\pi \sqrt{\frac{\ell }{g-\sqrt{\frac{{{q}^{2}}}{{{\ell }^{2}}m}}}}\]
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C)
\[2\pi \sqrt{\frac{\ell }{g}}\]
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D)
\[2\pi \sqrt{\frac{\ell }{g-\left( \frac{{{q}^{2}}}{\ell } \right)}}\]
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A string is wrapped several times round a solid cylinder and then the end of the string is held stationary while the cylinder is released from rest. The acceleration of the cylinder and tension in the string will be
A)
\[\frac{2g}{3}\]and\[\frac{mg}{3}\]
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B)
\[g\]and \[\frac{mg}{2}\]
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C)
\[\frac{g}{3}\]and \[\frac{mg}{2}\]
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D)
\[\frac{g}{2}\]and\[\frac{mg}{3}\]
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A uniform rod AB of mass m and length la is falling freely without rotation under gravity with AB horizontal. Suddenly the end A is fixed when the speed of the rod is v. The angular speed with which the rod begins to rotate is
A)
\[\frac{v}{2a}\]
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B)
\[\frac{4v}{3a}\]
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C)
\[\frac{v}{3a}\]
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D)
\[\frac{3v}{4a}\]
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A ray of light is incident on the surface of a glass plate of refractive index \[\sqrt{3}\]at the polarizing angle. The angle of refraction is
A)
\[60{}^\circ \]
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B)
\[30{}^\circ \]
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C)
\[45{}^\circ \]
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D)
\[50{}^\circ \]
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The current through \[10\Omega \] resistor in the circuit given below is (the diodes are ideal)
A)
50 mA
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B)
20 mA
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C)
40 mA
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D)
80 mA
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Hydrogen atoms are excited from ground state to the principal quantum number 4. Then the number of spectral lines observed will be
A)
3
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B)
6
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C)
5
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D)
2
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The value of Kp for the reaction, \[2{{H}_{2}}S(g)\leftrightarrow 2{{H}_{2}}\]\[(g)+{{S}_{2}}(g)\]is \[1.2\times {{10}^{-2}}\]at \[1065{{\,}^{o}}C.\]The value for Kc is
A)
\[<1.2\times {{10}^{-2}}\]
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B)
\[>1.2\times {{10}^{-2}}\]
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C)
\[1.2\times {{10}^{-2}}\]
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D)
\[0.12\times {{10}^{-2}}\]
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1 mol of\[C{{H}_{3}}COOH\]and 1 mol of \[{{C}_{2}}{{H}_{5}}OH\]reacts to produce \[\frac{2}{3}\]mol of \[C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}.\]The equilibrium constant is
A)
2
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B)
+ 2
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C)
- 4
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D)
+ 4
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Identify (Z) in the following reaction
A)
Benzoic acid
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B)
Carbolic acid
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C)
Phenol
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D)
Salicylaldehyde
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The normality of solution obtained by mixing 10 ml of \[\frac{N}{5}HCl\] and 30 ml of \[\frac{N}{10}HCl\] is
A)
\[\frac{N}{5}\]
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B)
\[\frac{N}{8}\]
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C)
\[\frac{N}{15}\]
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D)
\[\frac{N}{7.5}\]
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The Beilstein test for organic compounds is used to detect
A)
Nitrogen
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B)
Sulphur
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C)
Carbon
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D)
Halogens
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View Answer play_arrow
Internal energy does not include
A)
Vibrational energy
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B)
Energy due to gravitational pull distillation
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C)
Rotational energy
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D)
Vibrational energy
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Which group of periodic table contains no metal
A)
VIIA
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B)
IIIA
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C)
VIII
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D)
IA
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Transition elements form coloured ions due to
A)
Fully filled d-orbitals
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B)
Availability of s-electrons
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C)
d-d transition
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D)
Smaller atomic radii
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Turpentine oil can be purified by
A)
Vacuum distillation
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B)
Fractional distillation
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C)
Steam distillation
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D)
Sublimation
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The chief ore of Hg is
A)
Cinnabar
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B)
Galena
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C)
Pyrolusite
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D)
Barunite
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View Answer play_arrow
Oxidation number of Os in\[\text{Os}{{\text{O}}_{\text{4}}}\] is
A)
+4
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B)
+8
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C)
+10
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D)
+18
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Hydrogen has high ionization energy than alkali metals because it has
A)
Small size
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B)
Large size
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C)
Ionic bond
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D)
Covalent bond
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If \[\text{e=1}\text{.60206}\times \text{1}{{\text{0}}^{-19}}C,\]\[e/m=1.75875\]\[\times {{10}^{11}}C\]\[k{{g}^{-1}}\] then the mass of electron is
A)
\[19.091\times {{10}^{-31}}kg\]
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B)
\[11.5830\times {{10}^{-31}}kg\]
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C)
\[6.9091\times {{10}^{-31}}kg\]
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D)
\[9.1091\times {{10}^{-31}}kg\]
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View Answer play_arrow
The transition element which shows the highest oxidation state is
A)
Manganese
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B)
Iron
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C)
Chromium
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D)
Vanadium
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The pH of a solution having the\[{{\text{H}}^{\text{+}}}\]ion concentration of \[1\times {{10}^{-4}}g\]ions/litre is
A)
5
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B)
4
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C)
3
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D)
2
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View Answer play_arrow
Benzaldehyde can be prepared by the hydrolysis of
A)
Benzal chloride
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B)
Benzotrichloride
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C)
Benzonitrile
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D)
Benzyl chloride
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View Answer play_arrow
\[\text{Phenol}\xrightarrow{NaOH}(X)\xrightarrow{C{{O}_{2}}}(Y)\xrightarrow{{{H}^{+}}}(Z).\] (Z) is identified as
A)
Benzaldehyde
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B)
Benzoic acid
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C)
Salicylic acid
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D)
Sodium benzoate
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View Answer play_arrow
Alkynes usually show which type of reaction?
A)
Addition
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B)
Replacement
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C)
Substitution
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D)
Elimination
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View Answer play_arrow
The general molecular formula for disaccharide is
A)
\[{{C}_{10}}{{H}_{20}}{{O}_{10}}\]
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B)
\[{{C}_{12}}{{H}_{22}}{{O}_{10}}\]
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C)
\[{{C}_{12}}{{H}_{20}}{{O}_{10}}\]
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D)
\[{{C}_{12}}{{H}_{22}}{{O}_{11}}\]
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A gas expands isothermally against a constant external pressure of 1 atm from a volume of \[\text{10 d}{{\text{m}}^{\text{3}}}\]to a volume of \[\text{20 d}{{\text{m}}^{\text{3}}}\text{.}\] It absorbs 300 J of thermal energy from its surroundings. The \[\Delta U\]is
A)
-312 J
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B)
-213 J
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C)
-321 J
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D)
-123 J
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Chemical [A] is used for softening of water to remove temporary hardness. [A] reacts with sodium carbonates to produce caustic soda. When\[C{{O}_{2}}\]is bubble through [A] it turns cloudy. Chemically [A] is
A)
\[CaC{{O}_{3}}\]
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B)
\[Ca{{(HC{{O}_{3}})}_{2}}\]
done
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C)
\[Ca{{(OH)}_{2}}\]
done
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D)
\[CaO\]
done
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View Answer play_arrow
Bell metal is an alloy of
A)
Cu and Pb
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B)
Sn and Cu
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C)
Sn and Pb
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D)
None of these
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View Answer play_arrow
\[CuS{{O}_{4}}\]and KCN reacts to produce
A)
\[K[Cu{{(CN)}_{6}}]\]
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B)
\[CuCN\]
done
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C)
\[CuC{{N}_{2}}\]
done
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D)
\[{{K}_{3}}[Cu{{(CN)}_{4}}]\]
done
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View Answer play_arrow
The empirical formula of a compound is \[C{{H}_{2}}O.\]Its molecular weight is 180. The molecular formula of that compound is
A)
\[{{C}_{6}}{{H}_{12}}{{O}_{6}}\]
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B)
\[{{C}_{6}}H{{O}_{4}}\]
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C)
\[{{C}_{3}}{{H}_{6}}{{O}_{3}}\]
done
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D)
\[{{C}_{5}}{{H}_{10}}{{O}_{5}}\]
done
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View Answer play_arrow
Nitrolium is
A)
\[Ca{{(CN)}_{2}}\]
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B)
\[CaC{{N}_{2}}\]
done
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C)
\[Ca{{(N{{O}_{3}})}_{2}}\]
done
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D)
\[CaC{{N}_{2}}+C\]
done
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View Answer play_arrow
\[{{\,}_{12}}{{A}^{27}}+{{\,}_{2}}H{{e}^{4}}\to {{\,}_{14}}S{{i}^{30}}+{{\,}_{1}}{{H}^{1}}+Q\]Mass of\[{{\,}_{13}}A{{l}^{27}}=26.9815\]amu and mass of \[{{\,}_{14}}S{{i}^{30}}=29.9738.\]The Q is equal to
A)
2.329 MeV
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B)
3.298 MeV
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C)
12.98 MeV
done
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D)
5.478 MeV
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View Answer play_arrow
\[\text{A}{{\text{l}}_{\text{2}}}{{\text{O}}_{\text{3}}}\]on heating with carbon in an atmosphere of\[{{\text{N}}_{\text{2}}}\]at high temperature produces
A)
\[\text{Al+C}{{\text{O}}_{2}}+NO\]
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B)
\[Al+C{{O}_{2}}\]
done
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C)
\[AlN+CO\]
done
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D)
\[A{{l}_{4}}{{C}_{3}}+C{{O}_{2}}\]
done
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View Answer play_arrow
The product obtained by treating: \[C{{H}_{3}}-CH=C{{H}_{2}}+HBr\to \]
A)
\[C{{H}_{3}}-CH=C{{H}_{2}}Br\]
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B)
\[C{{H}_{2}}BrC{{H}_{2}}=C{{H}_{2}}\]
done
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C)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}Br\]
done
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D)
\[C{{H}_{3}}-\underset{Br}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C{{H}_{3}}\]
done
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View Answer play_arrow
The transport of matter in the absence of bulk flow is known as
A)
Transfusion
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B)
Diffusion
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C)
Rotation
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D)
Translation
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View Answer play_arrow
Purple of Cassius is a colloidal solution of
A)
Lead
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B)
Mercury
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C)
Silver
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D)
Gold
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Which of the following is not the characteristic of interhalogen compounds?
A)
More reactive than halogens
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B)
They are covalent
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C)
Quite unstable but not explosive
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D)
Have low boiling point and highly volatile
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The process of decomposition of organic compound by the application of heat is
A)
Evaporation
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B)
Sublimation
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C)
Pyrolysis
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D)
Condensation
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View Answer play_arrow
Gun metal is
A)
\[Cu+Sn+Zn\]
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B)
\[Zn+Sn\]
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C)
\[Cu+Zn\]
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D)
\[Cu+Sn\]
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View Answer play_arrow
The monomer of Teflon is
A)
Trifluoroethene
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B)
Tetrafluoroethene
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C)
Monofluoroethene
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D)
Difluoroethene
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View Answer play_arrow
The correct decreasing order of basic strength is
A)
\[P{{H}_{3}}>As{{H}_{3}}>Sb{{H}_{3}}>N{{H}_{3}}\]
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B)
\[~N{{H}_{3}}>P{{H}_{3}}>As{{H}_{3}}>Sb{{H}_{3}}\]
done
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C)
\[As{{H}_{3}}>Sb{{H}_{3}}\text{ }>P{{H}_{3}}>N{{H}_{3}}\]
done
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D)
\[Sb{{H}_{3}}>As{{H}_{3}}>P{{H}_{3}}>N{{H}_{3}}\]
done
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View Answer play_arrow
Iodide of Millon's base is
A)
\[{{K}_{2}}Hg{{I}_{4}}\]
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B)
\[HI{{O}_{3}}\]
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C)
\[Hg(N{{H}_{2}})I\]
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D)
\[N{{H}_{2}}HgO.HgI\]
done
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View Answer play_arrow
Sodium on heating with moist air produces
A)
\[NaO\]
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B)
\[N{{a}_{2}}O\]
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C)
\[N{{a}_{2}}C{{O}_{3}}\]
done
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D)
\[NaOH\]
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View Answer play_arrow
The product obtained by treating benzene with chlorine in presence of ultraviolet light
A)
\[{{C}_{6}}C{{l}_{6}}\]
done
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B)
\[{{C}_{6}}{{H}_{5}}Cl\]
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C)
\[CC{{l}_{4}}\]
done
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D)
\[{{C}_{6}}{{H}_{6}}C{{l}_{6}}\]
done
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View Answer play_arrow
Gammexane is
A)
BHC
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B)
HCB
done
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C)
Chloral
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D)
DDT
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View Answer play_arrow
Which of the following produces ketone on treatment with Grignard reagent?
A)
Acetic acid
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B)
Methyl alcohol
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C)
Methyl cyanide
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D)
Acetaldehyde
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View Answer play_arrow
Vinegar is represented by
A)
HCOOH
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B)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}COOH\]
done
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C)
\[C{{H}_{3}}COOH\]
done
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D)
\[~C{{H}_{3}}C{{H}_{2}}COOH\]
done
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View Answer play_arrow
Which shows electrical conductance?
A)
Graphite
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B)
Diamond
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C)
Potassium
done
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D)
Sodium
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View Answer play_arrow
Which of the following cannot displace hydrogen from its compound?
A)
Hg
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B)
Pb
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C)
Al
done
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D)
Fe
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The natural gas mainly contains
A)
Propane
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B)
Pentane
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C)
Butane
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D)
Methane
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View Answer play_arrow
Which compound can be sulphonated easily?
A)
Benzene
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B)
Nitrobenzene
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C)
Chlorobenzene
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D)
Toluene
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View Answer play_arrow
The energy of electron in the first energy level is \[-21.79\times {{10}^{-12}}\,\text{erg}\] per atom. The energy of electron in second energy level is
A)
\[-15.47\times {{10}^{-12}}\,\text{erg}\,\text{ato}{{\text{m}}^{-1}}\]
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B)
\[-0.00547\times {{10}^{-12}}\,\text{erg}\,\text{ato}{{\text{m}}^{-1}}\]
done
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C)
\[-4.557\times {{10}^{-12}}\,\text{erg}\,\text{ato}{{\text{m}}^{-1}}\]
done
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D)
\[-5.447\times {{10}^{-12}}\text{erg}\,\text{ato}{{\text{m}}^{-1}}\]
done
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View Answer play_arrow
Oxidation is
A)
Loss of electrons
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B)
Gain of electrons
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C)
Loss of neutrons
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D)
Decrease in positive valency
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View Answer play_arrow
When two halogen atoms are attached to same carbon atom then it is
A)
\[\alpha -\omega -\] halide
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B)
\[\alpha -\beta -\] halide
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C)
Gem dihalide
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D)
Vicinal dihalide
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View Answer play_arrow
Flux is used to remove
A)
Acidic impurities
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B)
Basic impurities
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C)
Both acidic and basic impurities
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D)
All types of impurities
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View Answer play_arrow
Geometrical isomerism is possible in case of
A)
Propene
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B)
2-butene
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C)
Tartaric acid
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D)
1-butene
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View Answer play_arrow
In five kingdom system, the main basis of classification is
A)
Structure of nucleus
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B)
Mode of nutrition
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C)
Structure of cell wall
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D)
Asexual reproduction
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The main difference in Gram-positive and Gram- negative bacteria resides in their
A)
Cell wall
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B)
Cell membrane
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C)
Cytoplasm
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D)
Flagella
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View Answer play_arrow
Plasmodium, the malaria parasite, belongs to class
A)
Sarcodina
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B)
Ciliata
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C)
Sporozoa
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D)
Dinophyceae
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View Answer play_arrow
Two bacteria found to be very useful in genetic engineering experiments are
A)
Escherichia and Agrobacterium
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B)
Nitrobacter and Azotobacter
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C)
Rhizobium and Diplococcus
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D)
Nitrosomonas and Klebsiella
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Viruses that infect bacteria, multiply and cause their lysis are called
A)
Lysozymes
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B)
Lipolytic
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C)
Lytic
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D)
Lysogenic
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View Answer play_arrow
White rust disease is caused by
A)
Claviceps
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B)
Alternaria
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C)
Phytophthora
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D)
Albugo Candida
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View Answer play_arrow
In fungi, stored food material is
A)
Glycogen
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B)
Starch
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C)
Sucrose
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D)
Glucose
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View Answer play_arrow
Which one of the following is a slime mould?
A)
Physarum
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B)
Thiobacillus
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C)
Anabaena
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D)
Rhizopus
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A plant in which sporophytic generation is represented by zygote
A)
Pinus
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B)
Selaginella
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C)
Chlamydomonas
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D)
Dryopteris
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A well-developed archegonium with a neck consisting of 4-6 rows of neck canal cells, characterizes
A)
Gymno sperms only
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B)
Bryophytes and pteridophytes
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C)
Pteridophytes and gymnosperms
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D)
Gymnosperms and flowering plants
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View Answer play_arrow
Which of the following propagates through leaf-tip?
A)
Walking fern
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B)
Sproux-leaf plant
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C)
Marchantia
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D)
Moss
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View Answer play_arrow
The latest model for plasma membrane is
A)
Lamellar model
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B)
Unit membrane model
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C)
Fluid mosaic model
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D)
Molecular lipid model
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View Answer play_arrow
Hammerling's experiments of Acetabularia involves exchanging
A)
Cytoplasm
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B)
Nucleus
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C)
Rhizoid and stalk
done
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D)
Gametes
done
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View Answer play_arrow
Segregation ofMendelian factor (Aa) occurs during
A)
Diplotene
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B)
Anaphase I
done
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C)
Zygotene/Pachytene
done
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D)
Anaphase II
done
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View Answer play_arrow
Mitochondrial cristae are sites of
A)
Breakdown of macromolecules
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B)
Protein synthesis
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C)
Phosphorylation of flavoproteins
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D)
Oxidation-reduction reactions
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View Answer play_arrow
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)
Epistasis
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View Answer play_arrow
Both husband and wife have normal vision though their fathers were colour-blind. The probability of their daughter becoming colour-blind is
A)
0%
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B)
25%
done
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C)
50%
done
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D)
75%
done
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View Answer play_arrow
Nucleosome core is made of
A)
\[\text{H1, H2A, H2B and H3}\]
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B)
\[\text{H1, H2A, H2B, H4}\]
done
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C)
\[\text{H1, H2A, H2B, H3}\,\text{and }\,\text{H4}\]
done
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D)
\[\text{ }\!\!~\!\!\text{ H2A, H2B, H3 and H4}\]
done
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View Answer play_arrow
Two non-allelic genes produce new phenotype when present together but fail to do so independently are called?
A)
Epistatsis
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B)
Polygene
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C)
Non-complimentary genes
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D)
Complimentary genes
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View Answer play_arrow
In pea plant, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ration of yellow and green seeded plants would you expect in \[{{\text{F}}_{\text{1}}}\]generation?
A)
9:1
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B)
1 : 3
done
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C)
3:1
done
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D)
50 : 50
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View Answer play_arrow
Khorana first deciphered the triplet codons of
A)
Serine and isoleucine
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B)
Cysteine and valine
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C)
Tyrosine and tryptophan
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D)
Phenylalanine and methionine
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View Answer play_arrow
During DNA replication, the strands separate by
A)
DNA polymerase
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B)
Topoisomerase
done
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C)
Unwindase/Helicase
done
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D)
Gyrase
done
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View Answer play_arrow
Gene and cistron words are sometimes used synony mously because
A)
One cistron contains many genes
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B)
One gene contains many cistrons
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C)
One gene contains one cistron
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D)
One gene contains no cistron
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View Answer play_arrow
Out of 64 codons, 61 codons code for 20 types of amino acid. It is called
A)
Degeneracy of genetic code
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B)
Overlapping of gene
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C)
Wobbling of codon
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D)
Universality of codons
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View Answer play_arrow
During transcription, the RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure, what is its DNA-binding sequence?
A)
AATT
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B)
CACC
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C)
TATA
done
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D)
TTAA
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View Answer play_arrow
Restriction endonucleases are
A)
Synthesized by bacteria as part of their defence mechanism.
done
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B)
Used for in vitro DNA synthesis.
done
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C)
Used in genetic engineering for ligating two DNA molecules.
done
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D)
Present in mammalian cells for degradation of DNA when the cell dies.
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View Answer play_arrow
The first successfully cloned mammal that gained worldwide publicity was
A)
Chance, a bull
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B)
Dolly, a sheep
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C)
Molly, a sheep
done
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D)
Polly, a sheep
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View Answer play_arrow
Telomere repetitive DNA sequences control the function of eukaryotic chromosomes because they
A)
Are RNA transcription initiator
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B)
Help chromosome pairing
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C)
Prevent chromosome loss
done
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D)
Act as replicons
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View Answer play_arrow
Vegetative reproduction of Agave occurs through
A)
Rhizome
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B)
Stolon
done
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C)
Bulbils
done
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D)
Sucker
done
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View Answer play_arrow
What is eye of potato?
A)
Axillary bud
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B)
Accessory bud
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C)
Adventitious bud
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D)
Apical bud
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View Answer play_arrow
Which of the following is a correct pair?
A)
Cuscuta - Parasite
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B)
Dischidia - Insectivorous
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C)
Opuntia - Predator
done
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D)
Capsella - Hydrophyte
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View Answer play_arrow
is the floral formula of
A)
Liliaceae
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B)
Solanaceae
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C)
Asteraceae
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D)
Fabaceae
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View Answer play_arrow
The aleurone layer in maize grain is especially rich in
A)
Auxins
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B)
Proteins
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C)
Starch
done
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D)
Lipids
done
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View Answer play_arrow
Monocot leaves possess
A)
Intercalary meristem
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B)
Lateral meristem
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C)
Apical meristem
done
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D)
Mass meristem
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View Answer play_arrow
Bordered pits are found in
A)
Sieve cells
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B)
Vessel wall
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C)
Companion cells
done
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D)
Sieve tube wall
done
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View Answer play_arrow
The main function of lenticel is
A)
Transpiration
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B)
Guttation
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C)
Gaseous exchange
done
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D)
Bleeding
done
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View Answer play_arrow
Guttation is mainly due to
A)
Root pressure
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B)
Osmosis
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C)
Transpiration
done
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D)
Imbibition
done
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View Answer play_arrow
Which one of the following is not an essential element for plants?
A)
Potassium
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B)
Iron
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C)
Iodine
done
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D)
Zinc
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View Answer play_arrow
A free living nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is
A)
Tolypothrix
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B)
Chlorella
done
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C)
Nostoc
done
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D)
Anabaena
done
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View Answer play_arrow
In \[{{C}_{4}}\] plants, Calvin cycle operates in the
A)
Stroma of bundle sheath chloroplasts
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B)
Grana of bundle sheath chloroplasts
done
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C)
Grana of mesophyll chloroplasts
done
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D)
Stroma of mesophyll chloroplasts
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View Answer play_arrow
Ferredoxin is a constituent of
A)
PS I
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B)
PS II
done
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C)
Hill reaction
done
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D)
\[{{P}_{680}}\]
done
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View Answer play_arrow
A photosynthesizing plant is releasing \[^{18}O\] more than the normal. The plant must have been supplied with
A)
\[{{O}_{3}}\]
done
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B)
\[{{H}_{2}}O\]
done
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C)
\[C{{O}_{2}}\,with{{\,}^{18}}O\]
done
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D)
\[{{C}_{6}}{{H}_{12}}{{O}_{6}}\,with{{\,}^{18}}O\]
done
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View Answer play_arrow
Terminal cytochrome of respiratory chain which donates electrons to oxygen is
A)
Cyt b
done
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B)
Cyt c
done
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C)
Cyt \[{{a}_{1}}\]
done
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D)
Cyt \[{{a}_{3}}\]
done
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View Answer play_arrow
Double fertilisation and triple fusion were discovered by
A)
Hofmeister
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B)
Nawaschin and Guignard
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C)
Leeuwenhoek
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D)
Strasburger
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View Answer play_arrow
Eight nucleate embryo sacs are
A)
Always tetrasporic
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B)
Always monosporic
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C)
Always bisporic
done
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D)
Sometimes monosporic, sometimes bisporic and sometimes tetrasporic.
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View Answer play_arrow
The arrangement of the nuclei in a normal embryo sac in the dicot plants is
A)
3+2 +3
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B)
2+3 + 3
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C)
3 + 3 + 2
done
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D)
2 + 4 + 2
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View Answer play_arrow
The hormone which is primarily connected with the cell division is
A)
IAA
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B)
NAA
done
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C)
Cytokinin/Zeatin
done
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D)
Gibberellic acid
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View Answer play_arrow
Which of the following breaks bud dormancy of potato tuber?
A)
Gibberellin
done
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B)
IAA
done
clear
C)
ABA
done
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D)
Zeatin
done
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View Answer play_arrow
Differentiation of shoot is controlled by
A)
High gibberellins: Cytokinin ratio
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B)
High auxin: Cytokinin ratio
done
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C)
High cytokinin: Auxin ratio
done
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D)
High gibberellins: Auxin ratio
done
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View Answer play_arrow
Which of the following is true about ecosystem?
A)
Primary consumers are least dependent upon producers.
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B)
Primary consumers out-number producers.
done
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C)
Producers are more than primary consumers.
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D)
Secondary consumers are the largest and most powerful.
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View Answer play_arrow
A group of individuals of the same kind of a phenotype characters and can interbreed is terms as
A)
Colony
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B)
Genus
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C)
Community
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D)
Species
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View Answer play_arrow
In grass-deer-tiger food chain, grass biomass is one tonne. The tiger biomass shall be
A)
100 kg
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B)
10 kg
done
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C)
200 kg
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D)
1 kg
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View Answer play_arrow
The transfer of energy from one trophic level to another is governed by the 2nd law of thermodynamics. The average efficiency of energy transfer from herbivores to carnivores is
A)
5 %
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B)
10 %
done
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C)
25 %
done
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D)
50 %
done
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View Answer play_arrow
Identify the odd combination of the habitat and the particular animal concerned.
A)
Sunderbans - Bengal Tiger
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B)
Periyar - Elephant
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C)
Rann of kutch - Wild Ass
done
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D)
Dachigam National - Snow Leopard park
done
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View Answer play_arrow
The highest DDT deposition shall occur in
A)
Phytoplankton
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B)
Seagull/Birds
done
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C)
Crab
done
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D)
Eel
done
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View Answer play_arrow
Which gas contributes the most to greenhouse effect?
A)
CFC
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B)
Freon
done
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C)
\[C{{O}_{2}}\]
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D)
\[C{{H}_{4}}\]
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The most common indicator organism that represents polluted water is
A)
E. coli
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B)
S. typhi
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C)
V. cholerae
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D)
Entamoeba
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Which of the following is absent in polluted water?
A)
Hydrilla
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B)
Water hyacinth
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C)
Larva of stone fly
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D)
Blue-green algae
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The first transgenic crop was
A)
Pea
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B)
Flax
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C)
Tobacco
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D)
Cotton
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Probiotics are
A)
Cancer inducing microbes
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B)
New kind of food allergens
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C)
Live microbial food supplement
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D)
Safe antibiotics
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Sarcoma is a type cancer of that develops in
A)
Epithelial tissue
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B)
Mesodermal tissues
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C)
Blood
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D)
Endodermal tissues
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Farmers have reported over 50 per cent higher yields of rice by using the biofertilizer
A)
Azolla pinnata
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B)
Cyanobacteria
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C)
Legume-Rhizobium symbiosis
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D)
My corrhiza
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Hybridoma cells are
A)
Nervous cells of frog
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B)
Hybrid cells resulting from myeloma cells
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C)
Only cells having oncogenes
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D)
Product of spore formation in bacteria
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Biological organisation starts with
A)
Cellular level
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B)
Organismic level
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C)
Atomic level
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D)
Submicroscopic molecular level
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Which is not consistent with the double helical structure of DNA?
A)
A = T, C = G
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B)
Density of DNA decreases on heating
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C)
A + T/C + G is not constant
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D)
Both [a] and [b]
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Protein synthesis in an animal cell takes place
A)
Only in the cytoplasm
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B)
In the nucleolus as well as in cytoplasm
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C)
In cytoplasm as well as in mitochondria
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D)
Only on ribosomes attached to the nuclear envelope.
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The transfer RNA molecule in 3D appears
A)
L-shaped
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B)
E-shaped
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C)
Y-shaped
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D)
S-shaped
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Transfer of Taenia to secondary host occurs as
A)
Oncosphere
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B)
Cysticercus
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C)
Morula
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D)
Egg
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A chordate character is
A)
Gills
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B)
Spiracles
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C)
Postanal tail
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D)
Chitinous exoskeleton
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An insect regarded as the greatest mechanical carrier of diseases is
A)
Pediculus
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B)
Cimex
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C)
Musca
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D)
Xenopsylla
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Sound box of birds is called
A)
Pygostyle
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B)
Larynx
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C)
Syrinx
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D)
Synsacrum
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Which one of the following is a matching set of a phylum and its three examples?
A)
Platyhelminthes - Planaria, Schistosoma, Enterobius
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B)
Mollusca - Loligo, Teredo, Octopus
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C)
Porifera - Spongilla, Euplectella, Pennatula
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D)
Cnidaria - Bonellia, Physalia, Aurelia
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Water is a resource which is
A)
Non-degradable and non-maintainable
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B)
Degradable and maintainable
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C)
Renewable
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D)
Non-renewable
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A number of natural reserves have been created to conserve specific wild life species. Identify the correct combination from the following
A)
Gir Forest - Lion
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B)
Kaziranga - Elephants
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C)
Rann of Kutch - Wild Ass
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D)
Manas wildlife Sanctuary - Musk deer
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Characteristics of smooth muscle fibres are
A)
Spindle-shaped, unbranched, unstriated, uninucleate and involuntary.
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B)
Spindle-shaped, unbranched, unstriped, multinucleate and involuntary.
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C)
Cylindrical, unbranched, unstriped, multinucleate and involuntary.
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D)
Cylindrical, unbranched, striated, multinucleate and voluntary.
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The polysaccharide present in the matrix of cartilage is known as
A)
Cartilagin
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B)
Ossein
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C)
Chondroitin
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D)
Casein
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Hydrolytic enzymes which act on low pH are known as
A)
Proteases
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B)
\[\alpha -\] Amylases
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C)
Hydrolases
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D)
Peroxidases
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Which one of the following is a fat-soluble vitamin and its related deficiency diseases?
A)
Retinol - Xerophthalmia
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B)
Cobalamin - Beriberi
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C)
Calciferol - Pellagra
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D)
Ascorbic acid - Scurvy
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When
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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People living at sea level have around 5 million RBC per cubic millimetre of their blood whereas those living at an altitude of 5400 metres have around 8 million. This is because at high altitudes
A)
Atmospheric
level is less and hence more RBC's are needed to absorb the required amount of
to survive.
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B)
There is more UV radiation which enhances the RBC production.
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C)
People eat more nutritive food; therefore more RBC's are formed.
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D)
People get pollution-free air to breathe and more oxygen is available.
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Closed circulatory system occurs in
A)
Cockroach
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B)
Tadpole/fish
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C)
Mosquito
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D)
Housefly
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Contraction of the ventricle in the heart begins by the command from
A)
Chordae tendineae
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B)
Sinoatrial node
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C)
Purkinje fibres
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D)
Atrioventricular node
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In Ornithine cycle, which one pair of the following wastes is removed from the blood?
A)
and urea
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B)
and ammonia
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C)
Ammonia and urea
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D)
Urea and sodium salts
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Bowman's glands are located in the
A)
Anterior pituitary region
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B)
Female reproductive system
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C)
Olfactory epithelium of our nose
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D)
Proximal end of uriniferous tubules
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Tendon is made up of
A)
Adipose tissue
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B)
Modified white fibrous tissue
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C)
Areolar tissue
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D)
Yellow fibrous connective tissue
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Which of the following pairs is correctly matched?
A)
Hinge joint - Between vertebrae
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B)
Gliding joint - Between zygapophyses of the successive vertebrae
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C)
Cartilaginous - Skull bones joint
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D)
Fibrous joint - Between phalanges
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Which of the following is an example of negative feedback loop in humans?
A)
Secretion of tears after falling of sand particles into the eye.
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B)
Salivation of mouth at the sight of delicious food.
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C)
Secretion of sweat glands and constriction of skin blood vessels when it is too hot.
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D)
Constriction of skin blood vessels and contraction of skeletal muscles when it is too cold.
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Which one of the following hormone stimulates the 'let-down' (release) of milk from the mother's breasts when the baby is sucking?
A)
Progesterone
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B)
Oxytocin
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C)
Prolactin
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D)
Relaxin
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Acromegaly is caused by
A)
Excess of GH
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B)
Excess of thyroxin
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C)
Deficiency of thyroxin
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D)
Excess of adrenaline
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Which of the following hormones is not a secretion product of human placenta?
A)
Human chorionic gonadotropin
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B)
Prolactin
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C)
Estrogen
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D)
Progesterone
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