A glass flask is filled up to a mark with 50 cc of mercury at \[9\times {{10}^{-6}}\text{/ }\!\!{}^\circ\!\!\text{ C}\] If the flask and contents are heated to \[38{}^\circ C,\] how much mercury-will be above the mark? (\[\alpha \]for glass is \[9\times {{10}^{-6}}\text{/ }\!\!{}^\circ\!\!\text{ C}\] and coefficient of real expansion of mercury is \[180\times {{10}^{-6}}/{}^\circ C)\]
A)
0.85 cc
done
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B)
0.46 cc
done
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C)
0.153 cc
done
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D)
0.05 cc
done
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View Answer play_arrow
Point masses of 1, 2, 3 and 4 kg are lying at the points \[(0,0,0),\] \[(2,0,0),\] \[(0,3,0)\] and \[(-2,-2,0)\] respectively The moment of inertia of this system about X-axis will be
A)
\[43\,\,kg\,{{m}^{2}}\]
done
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B)
\[34\,\,kg\,{{m}^{2}}\]
done
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C)
\[27\,\,kg\,{{m}^{2}}\]
done
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D)
\[72\,\,kg\,{{m}^{2}}\]
done
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View Answer play_arrow
A thin liquid film formed between a U-shaped wire and a light slider supports a weight of \[1.5\times {{10}^{-2}}\,N\](see figure). The length of the slider is 30 cm and its weight negligible. The surface tension of the liquid film is
A)
\[0.0125\,\,N{{m}^{-1}}\]
done
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B)
\[0.1\,\,N{{m}^{-1}}\]
done
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C)
\[0.05\,\,N{{m}^{-1}}\]
done
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D)
\[0.025\,\,N{{m}^{-1}}\]
done
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View Answer play_arrow
A bar magnet of magnetic moment \[\overrightarrow{M}\] is placed in the magnetic field \[\overrightarrow{B}.\] The torque acting on the magnet is
A)
\[\overrightarrow{M}\times \overrightarrow{B}\]
done
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B)
\[\overrightarrow{M}-\overrightarrow{B}\]
done
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C)
\[\frac{1}{2}\,\overrightarrow{M}\times \overrightarrow{B}\]
done
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D)
\[\overrightarrow{M}+\overrightarrow{B}\]
done
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View Answer play_arrow
A phase difference between two points separated by 0.8 m in a wave of frequency 120 Hz is \[\pi /2.\] The wave velocity is
A)
384 m/s
done
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B)
768 m/s
done
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C)
250 m/s
done
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D)
154 m/s
done
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View Answer play_arrow
A simple pendulum is executing simple harmonic motion with a time period T. If the length of the pendulum is increased by 21% then the increase in the time period of the pendulum due to increased length is
A)
50%
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B)
30%
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C)
21%
done
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D)
10%
done
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View Answer play_arrow
In a transformer, number of turns in the primary coil are 140 and that in the secondary coil are 280. If current in primary coil is 4A, then that in the secondary coil is
A)
4 A
done
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B)
2 A
done
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C)
6 A
done
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D)
10 A
done
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View Answer play_arrow
A triangular block of mass M with angles \[30{}^\circ ,\]\[60{}^\circ \]and \[90{}^\circ \] rest with its \[30{}^\circ -90{}^\circ \] side on a horizontal table. A cubical block of mass m rests on \[60{}^\circ -30{}^\circ \]side. The acceleration which M must have relative to the table to keep m stationary relative to the triangular block is (assuming frictionless contact)
A)
\[g\]
done
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B)
\[g/\sqrt{2}\]
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C)
\[g/\sqrt{3}\]
done
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D)
\[g/\sqrt{5}\]
done
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View Answer play_arrow
The K.E. of one mole of an ideal gas is E = (3/2) RT. Then \[{{C}_{p}}\] will be
A)
0.5 R
done
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B)
0.1 R
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C)
1.5 R
done
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D)
2.5 R
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View Answer play_arrow
A network of six identical capacitors, each of capacitance C is made as shown in the figure. The equivalent capacitance between points A and B is
A)
C/4
done
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B)
3C/4
done
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C)
4C/3
done
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D)
3C
done
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View Answer play_arrow
The condition for obtaining secondary maxima in the diffraction pattern due to single slit is
A)
\[a\,\,\sin \theta =n\lambda \]
done
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B)
\[a\,\,\sin \theta =(2n-1\frac{\lambda }{2})\]
done
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C)
\[a\,\,\sin \theta =(2n-1)\lambda \]
done
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D)
\[a\,\,\sin \theta =\frac{n\lambda }{2}\]
done
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View Answer play_arrow
If R is universal gas constant, the amount of heat needed to raise the temperature of 2 moles of an ideal monoatomic gas from 273 K to 373 K, when no work is done, is
A)
100 R
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B)
150 R
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C)
300 R
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D)
500 R
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View Answer play_arrow
How much energy is required for a body of mass 1000 kg to escape from the earth? \[(g=9.8\,m/{{s}^{2}},\] \[R=6400\,km)\]
A)
about \[3.2\times {{10}^{10}}\,J\]
done
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B)
about \[6.4\times {{10}^{10}}\,J\]
done
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C)
about \[6.4\times {{10}^{6}}\,J\]
done
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D)
None of these
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View Answer play_arrow
A wheel with ten metallic spokes each 0.50m long is rotated with a speed of 120 rev/min in a plane normal to the earth?s magnetic field at the place. If the magnitude of the field is 0.40 G, the induced emf between the axle and the rim of the wheel is equal to
A)
\[1.256\times {{10}^{-3}}V\]
done
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B)
\[6.28\times {{10}^{-4}}V\]
done
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C)
\[1.256\times {{10}^{-4}}V\]
done
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D)
\[6.28\times {{10}^{-5}}V\]
done
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View Answer play_arrow
A closed spherical surface of radius R encloses an electric dipole. The net electric flux through the surface is
A)
zero
done
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B)
\[2q.4\pi {{R}^{2}}\]
done
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C)
\[\frac{q}{{{\varepsilon }_{0}}}\]
done
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D)
\[\frac{2q}{{{\varepsilon }_{0}}}\]
done
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View Answer play_arrow
A spool is pulled horizontally by two equal and opposite forces on rough surface. The correct statement is:
A)
centre of mass of spool moves towards right
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B)
centre of mass of spool moves towards left
done
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C)
centre of mass remains at rest
done
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D)
none of these
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View Answer play_arrow
If the atom \[_{100}F{{m}^{257}}\] follows the Bohr model and the radius of \[_{100}F{{m}^{257}}\] is n times the Bohr radius, then find n.
A)
100
done
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B)
200
done
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C)
4
done
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D)
¼
done
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View Answer play_arrow
Two bodies of masses 10 kg and 100 kg are separated by a distance of 2m \[(G=6.67\times {{10}^{-11}}N{{m}^{2}}k{{g}^{-2}}).\] The gravitational potential at the mid-point on the line joining the two is
A)
\[7.3\times {{10}^{-7}}J/kg\]
done
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B)
\[7.3\times {{10}^{-9}}J/kg\]
done
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C)
\[-7.3\times {{10}^{-9}}J/kg\]
done
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D)
\[7.3\times {{10}^{-6}}J/kg\]
done
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View Answer play_arrow
For a given material, the Young's modulus is 2.4 times that of rigidity modulus, the Poission's ratio is
A)
0.2
done
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B)
0.4
done
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C)
12
done
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D)
2.4
done
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View Answer play_arrow
The logic behind 'NOR' gate is that it gives
A)
high output when both inputs are low
done
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B)
high output when both inputs are high
done
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C)
low output when both inputs are low
done
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D)
None of these
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View Answer play_arrow
A Laser light of wavelength 660 nm is used to weld Retina detachment. If a Laser pulse of width 60 ms and power 0.5 kW is used the approximate number of photons in the pulse are : [Take Planck's constant h \[=6.62\times {{10}^{-34}}Js\]]
A)
1020
done
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B)
1018
done
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C)
1022
done
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D)
1019
done
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View Answer play_arrow
A, B and C are three points in a uniform electric field. The electric potential is
A)
maximum at B
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B)
maximum at C
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C)
same at all the three points A, B and C
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D)
maximum at A
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View Answer play_arrow
A block B of mass 4 kg is placed on a rough horizontal plane. A time dependent horizontal force \[f=kt\] acts on the block, k \[=2\,N/{{s}^{2}}.\] The frictional force between the block and the plane at \[t=2\]sec is \[(\mu =0.2)\]
A)
4 N
done
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B)
8 N
done
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C)
12 N
done
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D)
zero
done
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View Answer play_arrow
Four charges equal to \[-\,Q\] are placed at the four corners of a square and a charge q is at its centre. If the system is in equilibrium the value of q is
A)
\[-\frac{Q}{4}\left( 1+2\sqrt{2} \right)\]
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B)
\[\frac{Q}{4}\left( 1+2\sqrt{2} \right)\]
done
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C)
\[-\frac{Q}{2}\left( 1+2\sqrt{2} \right)\]
done
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D)
\[\frac{Q}{2}\left( 1+2\sqrt{2} \right)\]
done
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View Answer play_arrow
Using equipartition of energy, the specific heat (in \[J\,k{{g}^{-1}}{{K}^{-1}}\]) of aluminium at room temperature can be estimated to be (atomic weight of aluminium = 27)
A)
410
done
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B)
25
done
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C)
1850
done
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D)
925
done
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View Answer play_arrow
A bag of mass M hangs by a long thread and a bullet (mass m) comes horizontally with velocity V and gets caught in the bag. Then for the combined (bag + bullet) system
A)
momentum \[=\frac{mvM}{M+m}\]
done
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B)
kinetic energy \[=\frac{m\,{{V}^{2}}}{2}\]
done
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C)
momentum \[=\frac{m\,V(M+m)}{M}\]
done
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D)
kinetic energy \[=\frac{{{m}^{2}}\,\,{{v}^{2}}}{2(M+m)}\]
done
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View Answer play_arrow
The efficiency of an ideal gas with adiabatic exponent Y for the shown cyclic process would be
A)
\[\frac{(2\,\,\text{ln}\,2-1)}{\gamma /(\gamma -1)}\]
done
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B)
\[\frac{(1-2\,\,\text{ln}\,2)}{\gamma /(\gamma -1)}\]
done
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C)
\[\frac{(2\,\,\text{ln}\,2+1)}{\gamma /(\gamma -1)}\]
done
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D)
\[\frac{(2\,\,\text{ln}\,\,2-1)}{\gamma /(\gamma +1)}\]
done
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View Answer play_arrow
The electric potential V(x) in a region around the origin is given by \[V(x)=4{{x}^{2}}\] volts. The electric charge enclosed in a cube of 1 m side with its centre at the origin is (in coulomb)
A)
\[8{{\varepsilon }_{0}}\]
done
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B)
\[-4{{\varepsilon }_{0}}\]
done
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C)
\[0\]
done
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D)
\[-8{{\varepsilon }_{0}}\]
done
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View Answer play_arrow
A gas is compressed from a volume of \[2{{m}^{3}}\] to a volume of \[1\,{{m}^{3}}\] at a constant pressure of \[100\,N/{{m}^{2}}.\] Then it is heated at constant volume by supplying 150 J of energy. As a result, the internal energy of the gas:
A)
increases by 250 J
done
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B)
decreases by 250 J
done
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C)
increases by 50 J
done
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D)
decreases by 50 J
done
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View Answer play_arrow
As intensity of incident light increases
A)
photoelectric current increase
done
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B)
K.E. of emitted photoelectron increases
done
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C)
photo electric current decreases
done
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D)
K.E. of emitted photoelectrons decreases
done
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View Answer play_arrow
A block of mass 60 kg just slides over a horizontal distance of 0.9 m. If the coefficient of friction between their surface is 0.15 then work done against friction will be
A)
79.4 J
done
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B)
97.54 J
done
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C)
105.25 J
done
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D)
None of these
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View Answer play_arrow
A projectile is projected at an angle of \[45{}^\circ \] with speed u. The radius of curvature of its trajectory at the maximum height is
A)
\[\frac{{{u}^{2}}}{g}\]
done
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B)
\[\frac{{{u}^{2}}}{4g}\]
done
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C)
\[\frac{2{{u}^{2}}}{g}\]
done
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D)
\[\frac{{{u}^{2}}}{2g}\]
done
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View Answer play_arrow
A wheel having moment of inertia \[2\,kg-{{m}^{2}}\] about its vertical axis, rotates at the rate of 60 rpm about this axis, The torque which can stop the wheel's rotation in one minute would be
A)
\[\frac{\pi }{18}Nm\]
done
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B)
\[\frac{2\pi }{15}Nm\]
done
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C)
\[\frac{\pi }{12}Nm\]
done
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D)
\[\frac{\pi }{15}Nm\]
done
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View Answer play_arrow
Two long parallel wires P and Q are held perpendicular to the plane of paper with distance of 5m between them. If P and Q carry current of 2.5 A. and 5 A. respectively in the same direction, then the magnetic field at a point half-way between the wires is
A)
\[{{\mu }_{0}}/17\]
done
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B)
\[\sqrt{3}{{\mu }_{0}}/2\pi \]
done
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C)
\[{{\mu }_{0}}/2\pi \]
done
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D)
\[3{{\mu }_{0}}/2\pi \]
done
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View Answer play_arrow
In the given circuit the reading of voltmeter \[{{V}_{1}}\] and \[{{V}_{2}}\] are 300 volt each. The reading of the voltmeter \[{{V}_{3}}\] and ammeter A are respectively
A)
150 V and 2.2 A
done
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B)
220 V and 2.2 A
done
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C)
220 V and 2.0 A
done
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D)
100 V and 2.0 A
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View Answer play_arrow
The photoelectric work function for a metal surface is 4.125 eV. The cut-off wavelength for this surface is
A)
\[4125\,A{}^\circ \]
done
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B)
\[3000\,A{}^\circ \]
done
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C)
\[6000\,A{}^\circ \]
done
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D)
\[2062\,A{}^\circ \]
done
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View Answer play_arrow
Which is true of the following in a purely resistive ac circuit?
A)
The current leads the driving voltage
done
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B)
The driving voltage leads the current.
done
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C)
The current and driving voltage are in the same phase.
done
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D)
Any of the above may be true depending on the value of resistance
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View Answer play_arrow
The position x of a particle at time t is given by\[x=\frac{{{V}_{0}}}{a}(1-{{e}^{-at}},)\] where \[{{V}_{0}}\] is constant and \[a>0.\] The dimensions of \[{{V}_{0}}\] and a are respectively
A)
\[{{M}^{0}}L\,{{T}^{-1}}\] and \[{{T}^{-1}}\]
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B)
\[{{M}^{0}}L\,{{T}^{0}}\] and \[{{T}^{-1}}\]
done
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C)
\[{{M}^{0}}L\,{{T}^{-1}}\] and \[L{{T}^{-2}}\]
done
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D)
\[{{M}^{0}}L\,{{T}^{-1}}\] and \[T\]
done
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View Answer play_arrow
A soap bubble has radius r and volume V. If the excess pressure inside the bubble is P, then PV is proportional to
A)
\[r\]
done
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B)
\[{{r}^{2}}\]
done
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C)
\[{{r}^{3}}\]
done
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D)
\[{{r}^{4}}\]
done
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View Answer play_arrow
A particle executes S.H.M. having time period T. Time period with which the potential energy changes is
A)
\[T\]
done
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B)
\[2T\]
done
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C)
\[T/2\]
done
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D)
\[\infty \]
done
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View Answer play_arrow
If red light and violet light rays are of focal lengths \[{{F}_{R}}\] and \[{{F}_{V}}\] respectively, then which one of the following is true?
A)
\[{{\lambda }_{R}}\le {{\lambda }_{\,V}}\]
done
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B)
\[{{\mu }_{R}}>{{\mu }_{\,V}}\]
done
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C)
\[{{\mu }_{R}}={{\mu }_{\,V}}\]
done
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D)
\[{{\mu }_{R}}<{{\mu }_{\,V}}\]
done
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View Answer play_arrow
Hysteresis loops for two magnetic materials A and B are given below:
These materials are used to make magnets for elecric generators, transformer core and electromagnet core. Then it is proper to use:
A)
A for transformers and B for electric generators.
done
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B)
B for electromagnets and transformers.
done
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C)
(e) A for electric generators and trasformers.
done
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D)
A for electromagnets and B for electric generators.
done
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View Answer play_arrow
A ray of monochromatic light suffers minimum deviation of \[38{}^\circ ,\] while passing through a prism of refracting angle \[60{}^\circ .\] Refractive index of the prism material is
A)
2.4
done
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B)
0.8
done
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C)
1.3
done
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D)
1.5
done
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View Answer play_arrow
Two resistors A and B have resistances \[{{R}_{A}}\] and \[{{R}_{B}}\] respectively with \[{{R}_{A}}<{{R}_{B}}.\] The resistivities of their materials are \[{{\rho }_{A}}\] and \[{{\rho }_{B}}.\] Then
A)
\[{{\rho }_{A}}>{{\rho }_{B}}\]
done
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B)
\[{{\rho }_{A}}={{\rho }_{B}}\]
done
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C)
\[{{\rho }_{A}}<{{\rho }_{B}}\]
done
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D)
The information is not sufficient to find the relation between \[{{\rho }_{A}}\] and \[{{\rho }_{B}}\]
done
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View Answer play_arrow
The escape velocity for a body projected vertically upwards from the surface of earth is 11 km/s. If the body is projected at an angle of \[45{}^\circ \] with the vertical, the escape velocity will be
A)
\[22\,km/s\]
done
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B)
\[11\,km/s\]
done
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C)
\[\frac{11}{\sqrt{2}}\,km/s\]
done
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D)
\[11\sqrt{2}\,km/s\]
done
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View Answer play_arrow
Which of the following statements is incorrect regarding dehydrohalogenation of alkenes?
A)
During the reaction hydrogen atom is eliminated from the p - carbon atom.
done
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B)
Rate of reaction for same alkyl group; Iodine > Bromine > Chlorine
done
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C)
Rate of reaction; \[{{(C{{H}_{3}})}_{3}}C->{{(C{{H}_{3}})}_{2}}CH->C{{H}_{3}}C{{H}_{2}}-\]
done
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D)
Only nature of halogen atom determine rate of the reaction.
done
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View Answer play_arrow
Which of the following pairs of compounds are positional isomers?
A)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\underset{\underset{O}{\mathop{\parallel }}\,}{\mathop{C}}\,-C{{H}_{3}}\] and \[C{{H}_{3}}-C{{H}_{2}}-\underset{\underset{O}{\mathop{\parallel }}\,}{\mathop{C}}\,-C{{H}_{2}}-C{{H}_{3}}\]
done
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B)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-CHO\] and \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\overset{O}{\mathop{\overset{\parallel }{\mathop{C}}\,}}\,-C{{H}_{3}}\]
done
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C)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\underset{\underset{O}{\mathop{\parallel }}\,}{\mathop{C}}\,-C{{H}_{3}}\] and \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,H}}\,-C{{H}_{2}}-CHO\]
done
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D)
\[C{{H}_{3}}-C{{H}_{2}}-\underset{\underset{O}{\mathop{\parallel }}\,}{\mathop{C}}\,-C{{H}_{2}}-C{{H}_{3}}\] and
done
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View Answer play_arrow
Which one of the following complexes will consume more equivalents of aqueous solution of \[AgN{{O}_{3}}?\]
A)
\[N{{a}_{2}}[CrC{{l}_{5}}({{H}_{2}}O)]\]
done
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B)
\[N{{a}_{3}}[CrC{{l}_{6}}]\]
done
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C)
\[[Cr{{({{H}_{2}}O)}_{5}}Cl]C{{l}_{2}}\]
done
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D)
\[[Cr{{({{H}_{2}}O)}_{6}}Cl]C{{l}_{3}}\]
done
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View Answer play_arrow
A)
A-(q), B-(s), C-(p), D-(r)
done
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B)
A-(r), B-(p), C-(s), D-(q)
done
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C)
A-(r), B-(s), C-(p), D-(q)
done
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D)
A-(s), B-(r), C-(q), D-(p)
done
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View Answer play_arrow
If 0.1 M of a weak acid is taken, and its percentage of degree of ionization is 1.34%, then its ionization constant will be :
A)
\[0.8\times {{10}^{-5}}\]
done
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B)
\[1.79\times {{10}^{-5}}\]
done
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C)
\[0.182\times {{10}^{-5}}\]
done
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D)
none of the above
done
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View Answer play_arrow
An organic compound X (molecular formula \[{{C}_{6}}{{H}_{7}}{{O}_{2}}N\]) has six carbon atoms in a ring system, two double bonds and a nitro group as substituent, X is :
A)
Homocyclic but not aromatic
done
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B)
Aromatic but not homocyclic
done
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C)
Homocyclic and aromatic
done
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D)
Heterocyclic and aromatic
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View Answer play_arrow
In which of the following regions hydrogen and helium are found:
A)
Stratosphere
done
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B)
Mesosphere
done
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C)
Exosphere
done
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D)
Troposphere
done
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View Answer play_arrow
Which of the following statements) is/are correct?
(i) The atomic and ionic radii of alkaline earth metals are smaller than those of the corresponding alkali metals in the same periods. (ii) Second ionisation enthalpies of the alkaline earth metals are smaller than those of the corresponding alkali metals. (iii) Compounds of alkaline earth metals are more extensively hydrated than those of alkali metals
A)
(i) and (ii)
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B)
(ii) and (iii)
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C)
(i) and (iii)
done
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D)
(i), (ii) and (iii)
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View Answer play_arrow
The chemical system that is non-aromatic 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
Among the following compounds (I - III), the ease of their reaction with electrophiles is,
A)
II > III > I
done
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B)
III > II > I
done
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C)
II > I > III
done
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D)
I > II > III
done
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View Answer play_arrow
Haemoglobin contains 0.334%ofiron by weight. The molecular weight of haemoglobin is approximately 67200. The number of iron atoms (at. wt. of Fe is 56) present in one molecule of haemoglobin are
A)
1
done
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B)
6
done
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C)
4
done
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D)
2
done
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View Answer play_arrow
The cation that will not be precipitated by \[{{H}_{2}}S\] in the presence of dil. HCl is :
A)
\[P{{b}^{2+}}\]
done
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B)
\[C{{u}^{2+}}\]
done
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C)
\[C{{o}^{2+}}\]
done
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D)
done
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View Answer play_arrow
The correct order of thermal stability of hydroxides is:
A)
\[Ba{{(OH)}_{2}}<Ca{{(OH)}_{2}}<Sr{{(OH)}_{2}}<Mg{{(OH)}_{2}}\]
done
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B)
\[Mg{{(OH)}_{2}}<Sr{{(OH)}_{2}}<Ca{{(OH)}_{2}}<Ba{{(OH)}_{2}}\]
done
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C)
\[Mg{{(OH)}_{2}}<Ca{{(OH)}_{2}}<Sr{{(OH)}_{2}}<Ba{{(OH)}_{2}}\]
done
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D)
\[Ba{{(OH)}_{2}}<Sr{{(OH)}_{2}}<Ca{{(OH)}_{2}}<Mg{{(OH)}_{2}}\]
done
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View Answer play_arrow
AB crystallizes in a body centred cubic lattice with edge length 'a' equal to 387 pm. The distance between two oppositely charged ions in the lattice is:
A)
335 pm
done
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B)
250 pm
done
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C)
200 pm
done
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D)
300 pm
done
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View Answer play_arrow
The reagent (s) which can be used to distinguish acetophenone from benzophenone is (are):
A)
\[2,\]4-Dinitrophenylhydrazine
done
clear
B)
Aqueous solution of \[NaHS{{O}_{3}}\]
done
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C)
Benedict reagent
done
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D)
\[{{I}_{2}}\]and \[NaOH.\]
done
clear
View Answer play_arrow
For the cell \[Zn|Z{{n}^{2+}}(1M)\parallel C{{u}^{2+}}(1M)|Cu,\]\[E_{cell}^{{}^\circ }\,is\,1.10\,V,\] \[E_{C{{u}^{2+}}/Cu}^{{}^\circ }=0.34\,V\] and for the cell \[Cu|C{{u}^{2+}}(1M)\parallel A{{g}^{+}}(1M)|Ag,\] \[E_{cell}^{{}^\circ }=0.46\,V\] hence, \[E_{cell}^{{}^\circ }\] of the cell \[Zn|Z{{n}^{2+}}(1M)\parallel A{{g}^{+}}(1M)|Ag\] is
A)
\[-0.04\,V\]
done
clear
B)
\[+0.04\,V\]
done
clear
C)
\[+0.30\,V\]
done
clear
D)
\[+1.56\,V\]
done
clear
View Answer play_arrow
Among the following complexes, optical activity is possible in
A)
\[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}\]
done
clear
B)
\[{{[Co{{({{H}_{2}}O)}_{2}}{{(N{{H}_{3}})}_{2}}C{{l}_{2}}]}^{+}}\]
done
clear
C)
\[{{[Cr{{({{H}_{2}}O)}_{2}}C{{l}_{2}}]}^{+}}\]
done
clear
D)
\[[Co{{(CN)}_{5}}NC]\]
done
clear
View Answer play_arrow
The r.m.s velocity of hydrogen is \[\sqrt{7}\] times the r.m.s velocity of nitrogen. If T is the temperature of the gas , then
A)
\[{{T}_{({{H}_{2}})}}={{T}_{({{N}_{2}})}}\]
done
clear
B)
\[{{T}_{({{H}_{2}})}}>{{T}_{({{N}_{2}})}}\]
done
clear
C)
\[{{T}_{({{H}_{2}})}}<{{T}_{({{N}_{2}})}}\]
done
clear
D)
\[{{T}_{({{H}_{2}})}}=\sqrt{7}{{T}_{({{N}_{2}})}}\]
done
clear
View Answer play_arrow
The correct order of ionic radii of \[{{Y}^{3+}},\]\[L{{a}^{3+}},\]\[E{{u}^{3+}}\] and \[L{{u}^{3+}}\] is
A)
\[{{Y}^{3+}}<L{{a}^{3+}}<E{{u}^{3+}}<L{{u}^{3+}}\]
done
clear
B)
\[L{{u}^{3+}}<E{{u}^{3+}}<L{{a}^{3+}}<{{Y}^{3+}}\]
done
clear
C)
\[L{{a}^{3+}}<E{{u}^{3+}}<L{{u}^{3+}}<{{Y}^{3+}}\]
done
clear
D)
\[{{Y}^{3+}}<L{{u}^{3+}}<E{{u}^{3+}}<L{{a}^{3+}}\]
done
clear
View Answer play_arrow
The\[p{{K}_{a}}\]of an amino acid is 9.15. At what pH amino acid is 5% dissociated?
A)
9.15
done
clear
B)
4.85
done
clear
C)
9.44
done
clear
D)
7.87
done
clear
View Answer play_arrow
In the froth floatation process for the purification of ores, the ore particles float because :
A)
They are light.
done
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B)
Their surface is hydrophobic i.e. not easily wetted by water.
done
clear
C)
They bear electrostatic charge.
done
clear
D)
They are insoluble.
done
clear
View Answer play_arrow
\[{{T}_{50}}\] of first -order reaction is 10 min. Starting with \[10\,mol\,{{L}^{-1}}\] rate after 20 min is
A)
\[0.0693\,mol\,{{L}^{-1}}\,{{\min }^{-1}}\]
done
clear
B)
\[0.0693\times 2.5\,mol\,{{L}^{-1}}\,{{\min }^{-1}}\]
done
clear
C)
\[0.0693\times 5\,mol\,{{L}^{-2}}\,{{\min }^{-1}}\]
done
clear
D)
\[0.0693\times 10\,mol\,{{L}^{-1}}\,{{\min }^{-1}}\]
done
clear
View Answer play_arrow
Which of the following organometallic compound is \[\sigma \] and \[\pi \] bonded?
A)
\[[Fe{{({{\eta }^{5}}-{{C}_{5}}{{H}_{5}})}_{2}}]\]
done
clear
B)
\[Fe{{(C{{H}_{3}})}_{3}}\]
done
clear
C)
\[K[PtC{{l}_{3}}({{\eta }^{2}}-{{C}_{2}}{{H}_{4}})]\]
done
clear
D)
\[{{[Co{{(CO)}_{5}}N{{H}_{3}}]}^{2+}}\]
done
clear
View Answer play_arrow
Which of the following statement is false?
A)
For 1 mole of an ideal gas, \[{{C}_{p}}-{{C}_{v}}=R\]
done
clear
B)
\[{{\left( \frac{\partial E}{\partial T} \right)}_{T}}=0\] for an ideal gas
done
clear
C)
\[\Delta q=\Delta w+P\Delta V\]
done
clear
D)
For reversible isothermal expansion of 1 mole of an ideal gas from volume \[{{V}_{1}}\] to \[{{V}_{2}},\]work done is equal to RT In\[({{V}_{2}}/{{V}_{1}})\]
done
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View Answer play_arrow
The correct order of the decreasing ionic radii among the following isoelectronic species are :
A)
\[C{{a}^{2+}}>{{K}^{+}}>{{S}^{2-}}>C{{l}^{-}}\]
done
clear
B)
\[C{{l}^{-}}>{{S}^{2-}}>C{{a}^{2+}}>{{K}^{+}}\]
done
clear
C)
\[{{S}^{2-}}>C{{l}^{-}}>{{K}^{+}}>C{{a}^{2+}}\]
done
clear
D)
\[{{K}^{+}}>C{{a}^{2+}}>C{{l}^{-}}>{{S}^{2-}}\]
done
clear
View Answer play_arrow
A compound A with molecular formula \[{{C}_{10}}{{H}_{13}}Cl\] gives a white precipitate on adding silver nitrate solution. A on reacting with alcoholic KOH gives compound B as the main product. B on ozonolysis gives C and D. C gives Cannizzaro reaction but not aldol condensation. D gives aldol condensation but not Cannizzaro reaction. A is:
A)
\[{{C}_{6}}{{H}_{5}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-Cl\]
done
clear
B)
\[{{C}_{6}}{{H}_{5}}-C{{H}_{2}}-C{{H}_{2}}-\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\]
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
\[Sn{{O}_{2}}\] is taken in basic medium and current is passed. Colloidal sol migrates towards
A)
anode (\[+\] plate)
done
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B)
cathode (\[-\] plate)
done
clear
C)
both [a] and [b]
done
clear
D)
none of these
done
clear
View Answer play_arrow
0.45 g of acid of molecular weight 90 was neutralized by 20 ml. of a 0.5N caustic potash. The basicity of an acid is
A)
1
done
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B)
2
done
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C)
3
done
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D)
4
done
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View Answer play_arrow
Which of the following is a broad spectrum drug?
A)
Plasmoquine
done
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B)
Chloroquine
done
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C)
Chloramphenicol
done
clear
D)
D.D.T.
done
clear
View Answer play_arrow
A compound on treatment with NaOH followed by addition of \[Ag\,N{{O}_{3}}\]produces white precipitate at room temperature. The precipitate is soluble in \[N{{H}_{4}}OH.\] The compound is identified as
A)
vinyl chloride
done
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B)
benzyl chloride
done
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C)
chlorobenzene
done
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D)
ethyl bromide
done
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View Answer play_arrow
Which of the following statements(s) is/are incorrect?
(i) Only \[1/{{8}^{th}}\] portion of an atom located at comer of a cubic unit cell is its neighbouring unit cell. (ii) Total number of atoms per unit cell for a face centered cubic unit cell is 3. (iii) Atom located at the body center is shared between two adjacent unit cells.
A)
(iii) only
done
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B)
(ii) only
done
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C)
(i) and (ii)
done
clear
D)
(ii) and (iii)
done
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View Answer play_arrow
Equivalent conductance of an electrolyte containing NaF at infinite dilution is \[90.1\,Oh{{m}^{-1}}c{{m}^{2}}.\] If NaF is replaced by KF what is the value of equivalent conductance?
A)
\[90.1\,Oh{{m}^{-1}}c{{m}^{2}}\]
done
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B)
\[111.2\,Oh{{m}^{-1}}c{{m}^{2}}\]
done
clear
C)
\[0\]
done
clear
D)
\[222.4\,Oh{{m}^{-1}}c{{m}^{2}}\]
done
clear
View Answer play_arrow
The enthalpy of combustion of \[{{C}_{6}}{{H}_{6}}\] is -3250 kJ, when 0.39 gm of \[{{C}_{6}}{{H}_{6}}\] is burnt in excess of oxygen in an open vessel, the amount of heat evolved is
A)
8.32 kJ
done
clear
B)
12.36 kJ
done
clear
C)
16.25 kJ
done
clear
D)
20.74 kJ
done
clear
View Answer play_arrow
In which of the following is there a consistent decrease in atomic radius as the atomic number increases?
A)
halogens
done
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B)
representative elements
done
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C)
transition elements
done
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D)
lanthanides
done
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View Answer play_arrow
The basicity of aniline is less than that of cyclohexylamine. This is due to
A)
\[+\]R effect of \[-\]\[N{{H}_{2}}\] group
done
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B)
\[-\]1 effect of \[-\]\[N{{H}_{2}}\] group
done
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C)
\[-\]R effect of \[-\]\[N{{H}_{2}}\] group
done
clear
D)
hyperconjugation effect
done
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View Answer play_arrow
Given \[F{{e}^{3+}}(aq)+{{e}^{-}}\to F{{e}^{2+}}(aq);\]\[E{}^\circ =+0.77\,V\] \[A{{l}^{3+}}(aq)+3{{e}^{-}}\to Al(s);\]\[E{}^\circ =-1.66\,V\] \[B{{r}_{2}}(aq)+2{{e}^{-}}\to 2b{{r}^{-}};\,\,E{}^\circ =+1.09\,V\] Considering the electrode potentials, which of the following represents the correct order of reducing power?
A)
\[F{{e}^{2+}}<Al<B{{r}^{-}}\]
done
clear
B)
\[B{{r}^{-}}<F{{e}^{2+}}<Al\]
done
clear
C)
\[Al<B{{r}^{-}}<F{{e}^{2+}}\]
done
clear
D)
\[Al<F{{e}^{2+}}<B{{r}^{-}}\]
done
clear
View Answer play_arrow
Mac Arthur process is used for the extraction of:
A)
Au
done
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B)
Pt
done
clear
C)
Cu
done
clear
D)
Zn
done
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View Answer play_arrow
\[{{H}_{3}}B{{O}_{2}}\]is
A)
monobasic and weak Lewis acid
done
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B)
monobasic and weak Bronsted acid
done
clear
C)
monobasic and strong Lewis acid
done
clear
D)
tribasic and weak Bronsted acid
done
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View Answer play_arrow
The following equilibrium constants are given: \[{{N}_{2}}+3{{H}_{2}}2N{{H}_{3}};\]\[{{K}_{1}}\] \[{{N}_{2}}+{{O}_{2}}2NO;\]\[{{K}_{2}}\] \[{{H}_{2}}+\frac{1}{2}{{O}_{2}}{{H}_{2}}O;\]\[{{K}_{2}}\] The equilibrium constant for the oxidation of \[N{{H}_{3}}\] by oxygen to give NO is
A)
\[\frac{{{K}_{2}}K_{3}^{2}}{{{K}_{1}}}\]
done
clear
B)
\[\frac{K_{2}^{2}{{K}_{3}}}{{{K}_{1}}}\]
done
clear
C)
\[\frac{{{K}_{1}}{{K}_{2}}}{{{K}_{3}}}\]
done
clear
D)
\[\frac{{{K}_{2}}K_{3}^{3}}{{{K}_{1}}}\]
done
clear
View Answer play_arrow
The ortho/para directing group among the following is:
A)
\[COOH\]
done
clear
B)
\[CN\]
done
clear
C)
\[COC{{H}_{3}}\]
done
clear
D)
\[NHCON{{H}_{2}}\]
done
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View Answer play_arrow
Benzoic acid gives benzene on being heated with X and phenol gives benzene on being heated with Y. Therefore X and Y are respectively
A)
Soda-lime and copper
done
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B)
Zn dust and NaOH
done
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C)
Zn dust and soda-lime
done
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D)
Soda-lime and zinc dust.
done
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View Answer play_arrow
The enthalpies of the following reactions are shown below. \[\frac{1}{2}{{H}_{2}}(g)+\frac{1}{2}{{O}_{2}}(g)\to OH(g);\] \[\Delta H=42.09\,kJ\,mo{{l}^{-1}}\] \[{{H}_{2}}(g)\to 2H(g);\]\[\Delta H=435.89\,kJ\,mo{{l}^{-1}}\] \[{{O}_{2}}(g)\to 2O(g);\]\[\Delta H=495.05\,kJ\,mo{{l}^{-1}}\] Calculate the \[O-H\] bond energy for the hydroxyl radical.
A)
\[223.18\,kJ\,mo{{l}^{-1}}\]
done
clear
B)
\[423.38\,kJ\,mo{{l}^{-1}}\]
done
clear
C)
\[513.28\,kJ\,mo{{l}^{-1}}\]
done
clear
D)
\[113.38\,kJ\,mo{{l}^{-1}}\]
done
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View Answer play_arrow
Elements X, Y and Z have atomic numbers 19, 37 and 55 respectively. Which of the following statements is true about them?
A)
Their ionization potential would increase with increasing atomic number
done
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B)
'Y' would have an ionisation potential between those of 'X' and 'Z'
done
clear
C)
'Z' would have the highest ionization potential
done
clear
D)
'Y' would have the highest ionization potential.
done
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View Answer play_arrow
\[Mn{{O}_{4}}^{2-}\] (1mole) in neutral aqueous medium disproportionates to
A)
2/3 mole of \[Mn{{O}_{4}}^{-}\] and 1 /3 mole of \[Mn{{O}_{2}}\]
done
clear
B)
113 mole of \[Mn{{O}_{4}}^{-}\] and 2/3 mole of \[Mn{{O}_{2}}\]
done
clear
C)
1/3 mole of \[M{{n}_{2}}{{O}_{7}}\] and 1/3 mole of \[Mn{{O}_{2}}\]
done
clear
D)
2/3 mole of \[M{{n}_{2}}{{O}_{7}}\] and 1/3 mole of \[Mn{{O}_{2}}\]
done
clear
View Answer play_arrow
Formation of a solution from two components can be considered as
(i) pure solvent \[\to \] separated solvent molecules,\[\Delta {{H}_{1}}\] (ii) pure solute \[\to \] separated solute molecules,\[\Delta {{H}_{2}}\] (iii) separated solvent and solute molecules\[\to \] solution,\[\Delta {{H}_{3}}\] Solution so formed will be ideal if
A)
\[\Delta {{H}_{\text{soln}}}=\Delta {{H}_{1}}+\Delta {{H}_{2}}-\Delta {{H}_{3}}\]
done
clear
B)
\[\Delta {{H}_{\text{soln}}}=\Delta {{H}_{1}}-\Delta {{H}_{2}}-\Delta {{H}_{3}}\]
done
clear
C)
\[\Delta {{H}_{\text{soln}}}=\Delta {{H}_{3}}-\Delta {{H}_{1}}-\Delta {{H}_{2}}\]
done
clear
D)
\[\Delta {{H}_{\text{soln}}}=\Delta {{H}_{1}}+\Delta {{H}_{2}}+\Delta {{H}_{3}}\]
done
clear
View Answer play_arrow
Match column-I (Biological name) with column- II (Class) and choose the correct option.
Column-I (Biological name) Column-II (Class) A. Homo sapiens I. Dicotyledonae B. Musca domestica II. Mammalia C. Mangifera indica III. Monocotyledonae D. Triticum IV. Insects
A)
A-IV; B-II; C-I; D-III
done
clear
B)
A-II; B-IV; C-III; D-I
done
clear
C)
A-II; B-IV; C-I; D-III
done
clear
D)
A-II; B-I; C-IV; D-III
done
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View Answer play_arrow
Which meristem helps in increasing girth?
A)
Lateral meristem
done
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B)
Intercalary meristem
done
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C)
Primary meristem
done
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D)
Apical meristem
done
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View Answer play_arrow
A human bone marrow cell, in prophase of mitosis, contains 46 chromosomes. How many chromatids does it contain altogether?
A)
46
done
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B)
92
done
clear
C)
23
done
clear
D)
23 or 46
done
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View Answer play_arrow
In Chlorophyceae, sexual reproduction occurs by
A)
isogamy and anisogamy
done
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B)
isogamy, anisogamy and oogamy
done
clear
C)
oogamy only
done
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D)
anisogamy and oogamy
done
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View Answer play_arrow
Yeast is not included in protozoans but are placed fungi because
A)
it has no chlorophyll.
done
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B)
some fungal hyphae grow in such a way that they give the appearance of pseudomycelium.
done
clear
C)
it has eukaryotic organization.
done
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D)
cell wall is made up of cellulose and reserve food material is starch.
done
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View Answer play_arrow
According to widely accepted "fluid mosaic model" cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect?
A)
Proteins in cell membranes can travel within the lipid bilayer.
done
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B)
Proteins can also undergo flip-flop movements in the lipid bilayer.
done
clear
C)
Proteins can remain confined within certain domains of the membrane.
done
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D)
Many proteins remain completely embedded within the lipid bilayer.
done
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View Answer play_arrow
Which one of the following animals is correctly matched with its particular named taxonomic category?
A)
Tiger - tigris, the species
done
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B)
Cuttle fish - mollusca, a class
done
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C)
Humans - primata, the family
done
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D)
Housefly - musca, an order
done
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View Answer play_arrow
The endosperm of gymnosperm is
A)
triploid
done
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B)
haploid
done
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C)
diploid
done
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D)
polyploidy
done
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View Answer play_arrow
Which of the following statement is incorrect about emasculation?
A)
During emasculation process, stigma is removed.
done
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B)
Emasculated flowers are bagged in order to prevent self-pollination.
done
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C)
Emasculation is the removal of stamens before the maturation of selected bisexual flowers.
done
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D)
It is one of the steps for artificial hybridization.
done
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View Answer play_arrow
Which one of the following statements is correct for secondary succession?
A)
It begins on a bare rock
done
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B)
It occurs on a deforested site
done
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C)
It follows primary succession
done
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D)
It is similar to primary succession except that it has a relatively fast pace
done
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View Answer play_arrow
Identified A, B, C and D.
A)
A - Mesocarp; B - Endocarp; C - Seed; D-Thalamus
done
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B)
A - Seed; B - Thalamus; C - Mesocarp; D - Endocarp
done
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C)
A - Thalamus; B - Seed; C - Endocarp; D - Mesocarp
done
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D)
A - Mesocarp; B - Endocarp; C - Seed; D -Thalamus
done
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View Answer play_arrow
Syngamy means
A)
fusion of similar spores.
done
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B)
fusion of gametes.
done
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C)
fusion of dissimilar spores.
done
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D)
fusion of cytoplasm.
done
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View Answer play_arrow
Biochemical Oxygen Demand (BOD) in a river water
A)
has no relationship with concentration of oxygen in the water.
done
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B)
gives a measure of Salmonella in the water.
done
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C)
increases when sewage gets mixed with river water.
done
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D)
remains unchanged when algal bloom occurs.
done
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View Answer play_arrow
A bract can be differentiated from bracteole by its:
A)
Size
done
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B)
Position
done
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C)
Function
done
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D)
Colour
done
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View Answer play_arrow
The parenchyma tissue which forms the bulk of ovule where the sporogenous tissue is produced is-
A)
Megaspore mother cell
done
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B)
Nucellus
done
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C)
Ovule
done
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D)
Embryo sac
done
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View Answer play_arrow
Which of the following mineral is associated with the characters/functions given below?
(i) Helps in formation of middle lamella. (ii) Needed in mitotic spindle formation. (iii) Accumulates in older leaves. (iv) Involves in normal functioning of the cell membranes. (v) Activate certain enzymes. (vi) Plays an important role in regulating metabolic activities.
A)
\[{{K}^{+}}\]
done
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B)
\[F{{e}^{3+}}\]
done
clear
C)
\[N{{O}^{3-}}\]
done
clear
D)
\[C{{a}^{2+}}\]
done
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View Answer play_arrow
Movement of ions or molecules in a direction opposite to that of prevailing electrochemical gradient is known as
A)
diffusion
done
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B)
active transport
done
clear
C)
pinocytosis
done
clear
D)
brownian movement
done
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View Answer play_arrow
Which one is the correct summary equation of photosynthesis?
A)
\[{{C}_{6}}{{H}_{12}}{{O}_{6}}+6{{O}_{2}}\xrightarrow[{}]{}6C{{O}_{2}}+6{{H}_{2}}O+energy\]
done
clear
B)
\[{{C}_{6}}{{H}_{12}}{{O}_{6}}+6{{O}_{2}}+6{{H}_{2}}O\xrightarrow{{}}6C{{O}_{2}}+12{{H}_{2}}O+energy\]
done
clear
C)
\[6C{{O}_{2}}+6{{H}_{2}}O\xrightarrow{{}}6{{H}_{2}}O+{{C}_{6}}{{H}_{12}}{{O}_{6}}\]
done
clear
D)
\[6C{{O}_{2}}+12{{H}_{2}}O\xrightarrow[Chlorophyll]{Light}6{{O}_{2}}+{{C}_{6}}{{H}_{12}}{{O}_{6}}+6{{H}_{2}}O\]
done
clear
View Answer play_arrow
Which one is a long day plant?
A)
Tobacco
done
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B)
Glycinemax
done
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C)
Mirabilis jalapa
done
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D)
Spinach
done
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View Answer play_arrow
Opium is obtained from
A)
Papaver somniferum
done
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B)
Rauwolfia serpentine
done
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C)
Cannabis sativus
done
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D)
Claviceps purpurea
done
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View Answer play_arrow
Which of the following statements concerning rubisco are froe.
A)
Rubisco is an enzyme
done
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B)
Rubisco catalyzes both the beginning steps of photorespiration and the Calvin-Benson cycle.
done
clear
C)
Rubisco is the most abundant protein on earth
done
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D)
All of the above
done
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View Answer play_arrow
Turgor pressure become equal to the wall pressure when
A)
water leaves the cell
done
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B)
water enters the cell
done
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C)
no exchange of water takes place
done
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D)
solute goes from cell into water
done
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View Answer play_arrow
The figure given below shows the conversion of a substrate into product by an enzyme. In which one of the four options (a-d) the components or reaction labelled as A, B, C and D are identified correctly?
A)
A-Potential energy, B-Transition state, C-Activation energy with enzyme, D-Activation energy without enzyme
done
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B)
A-Transition state, B-Potential energy, C-Activation energy without enzyme, D-Activation energy with enzyme
done
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C)
A-Potential energy, B-Transition state, C-Activation energy with enzyme, D-Activation energy with enzyme
done
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D)
A-Activation energy with enzyme, B-Transition state, C-Activation energy without enzyme, D-Potential energy
done
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View Answer play_arrow
Which of the following statements about Rhizobium legume nodule formation is not true?
A)
Rhizobium can only fix nitrogen after it becomes a bacteroid within a root cortex cell.
done
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B)
Rhizobium induces invagination of root hairs.
done
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C)
Within an infection thread, Rhizobium is still extracellular to the plant.
done
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D)
The infection thread can fuse with any root cell of an appropriate legume species.
done
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View Answer play_arrow
Which of the following statement is incorrect?
A)
\[{{C}_{3}}\] plants respond to higher temperature, show higher photosynthetic rate while \[{{C}_{4}}\] plants have lower optimum temperature.
done
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B)
Tropical plants have higher temperature optimum than the plants adapted to temperate climate.
done
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C)
Light reaction is less temperature sensitive than dark reaction.
done
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D)
The effect of water as a factor is more through its effect on plant, rather than directly on photosynthesis.
done
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View Answer play_arrow
Nucleotide arrangement in DNA can be seen by
A)
X-ray crystallography
done
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B)
electron microscope
done
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C)
ultracentrifuge
done
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D)
light microscope
done
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View Answer play_arrow
Genetic map is one that
A)
shows the distribution of various species in a region
done
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B)
establishes sites of the genes on a chromosome
done
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C)
establishes the various stages in gene evolution
done
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D)
show the stages during the cell division
done
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View Answer play_arrow
DNA template sequence of CTGATAGC is transcribed over mRNA as
A)
GUCTUTCG
done
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B)
GACUAUCG
done
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C)
GAUTATUG
done
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D)
UACTATCU
done
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View Answer play_arrow
Humus is essential for plant growth because:
A)
it is rich in nutrients and increases the water holding capacity of soil
done
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B)
it increases aeration of soil
done
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C)
it increases porocity of soil
done
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D)
All of the above
done
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View Answer play_arrow
Which one of the following pesticides is banned now a-days?
A)
DDT
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B)
Eldrin
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C)
Aldrin
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D)
Toxaphene
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Ozone hole means
A)
hole in the ozone layer in stratosphere.
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B)
decrease in the thickness of ozone in the stratosphere.
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C)
decrease in concentration of ozone in trophosphere.
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D)
increase in the concentration of ozone in trophosphere.
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The new varieties of plants are produced by
A)
selection and hybridization
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B)
mutation and selection
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C)
introduction and mutation
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D)
selection and introduction
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A functional piece of mRNA has 66 codons. What is the maximum number of amino acids that could be present in the protein coded for by this mRNA?
A)
22
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B)
64
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C)
65
done
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D)
66
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What is the optimum pH for growth in most bacteria?
A)
2.5 - 3.5
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B)
3.5 - 4.5
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C)
4.5 - 5.5
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D)
6.5. - 7.5
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The following diagram is the polynucleotide chain. Identify A, B, C, D and E.
A)
A - Hydrogen bonds, B - Pyrimidine, C - Hexose (deoxyribose) sugar, D - 5' end, E - Purine base.
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B)
A - Hydrogen bonds, B - Purine base, C - Hexose (deoxyribose) sugar, D - 5' end, E - Pyrimidine.
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C)
A - Hydrogen bonds, B - Pyrimidine, C - Pentose (deoxyribose) sugar, D - 5' end, E - Purine base
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D)
A - Hydrogen bonds, B - Purine base, C - Pentose (deoxyribose) sugar, D - 5' end, E - Pyrimidine
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Waves of muscle contractions that move the intestinal content are:
A)
caused by contraction of skeletal muscle.
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B)
regulated by liver secretions.
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C)
called peristalsis.
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D)
voluntary.
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The method that renders the seed coat permeable to water so that embryo expansion is not physically retarded is
A)
vernalization
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B)
stratification
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C)
denudation
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D)
scarification
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In Kreb's cycle, the FAD precipitates as electron acceptor during the conversion of
A)
succinyl CoA to succinic acid
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B)
\[\alpha \]- ketoglutarate to succinyl CoA
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C)
fumaric acid to malic acid
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D)
succinic acid to fumaric acid
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In the DNA molecule:
A)
there are two strands which run antiparallel- one in 5'\[\to \]3' direction and other in 3'\[\to \]5' direction.
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B)
the total amount of purine nucleotides and pyrimidine nucleotides is not always equal.
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C)
there are two strands which run parallel in the 5'\[\to \]3' direction.
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D)
the proportion of Adenine in relation to thymine varies with the organism.
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Dormant lettuce seeds were exposed to the following succession of brief periods of red light (R) and far- red light (FR) light: FR-R-FR-R-FR-R-FR Which of the following is most likely to occur?
A)
Most of the seeds will germinate
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B)
Most of the seeds will not germinate
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C)
About one-half will germinate
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D)
The seeds will germinate but development will cease unless the epicotyl is exposed to red light.
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Which of the following would generally be considered the healthiest habitat?
A)
A sink habitat populated by many endemic species
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B)
A source habitat populated by many endemic species
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C)
A sink habitat populated by many exotic species
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D)
A source habitat populated by many exotic species
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Which one of the following help in absorption of phosphorus from soil by plants?
A)
Glomus
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B)
Rhizobium
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C)
Frankia
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D)
Anabaena
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The area where wild populations, traditional life styles and genetic resources are protected is :
A)
Core Zone
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B)
Buffer Zone
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C)
Biosphere reserve
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D)
Manipulation Zone
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The figure below is the diagrammatic representation of the E.coli vector pBR 322. Which one of the given options correctly identifies its certain component (s)?
A)
ori-original restriction enzyme
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B)
rop-reduced osmotic pressure
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C)
Hind HI, EcoRI-selectable markers
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D)
\[am{{p}^{R}},\]\[te{{t}^{R}}\]-antibiotic resistance genes
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Which one of the following option is correct for A, B, C and D?
A)
A - Exonuclease, B - Endonuclease, C - DNA ligase, D - Transformation
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B)
A - Exonuclease, B - Exonuclease, C - DNA ligase, D - Transformation
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C)
A - Exonuclease, B - Endonuclease, C - Hydrolase, D - Transduction
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D)
A - Restriction endonuclease, B - Restriction endonuclease, C - DNA ligase, D - transformation
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Which of the following groups of plants play an important role in plant succession on bare rocks/ soil?
A)
Algae
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B)
Bryophytes
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C)
Pteridophytes
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D)
Gymnosperms
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Which of the following cations is required for the conversion of prothrombin into active thrombin by thromboplastin?
A)
\[C{{u}^{2+}}\]
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B)
\[F{{e}^{3+}}\]
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C)
\[F{{e}^{2+}}\]
done
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D)
\[C{{a}^{2+}}\]
done
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Which one of the following statement regarding coelom of given animals is correct?
A)
Round worms (aschelminthes) are pseudocoelomates.
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B)
Molluscs are acoelomates.
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C)
Insects are pseudocoelomates.
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D)
Flatworms (platyhelminthes) are coelomates.
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Lymph differs from blood in
A)
absence of RBC
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B)
absence of WBC
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C)
excess of water
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D)
absence of protein
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Hardening of the arteries due to deposition of cholesterol is called
A)
thrombosis
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B)
atherosclerosis
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C)
rhinitis
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D)
angina
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Which one of the following is NOT a characteristic of phylum Annelida?
A)
Closed circulatory system
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B)
Segmentation
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C)
Pseudocoelom
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D)
Ventral nerve cord
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Fish which can be used in biological control of mosquitoes/Larvicidal fish is
A)
Eel
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B)
Carp
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C)
Cat Fish
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D)
Gambusia
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A person which shows the secondary sexual characters of both male and female is called -
A)
Intersex
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B)
Hermaphrodite
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C)
Bisexual
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D)
Gynandromorph
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Amniocentesis is a technique
A)
by which the essential amino acids in the body can be estimated
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B)
by which any chromosomal anomalies in the foetus can be detected
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C)
in which the sex of the foetus can be reversed
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D)
that can be used for correcting genetic disorders of the foetus
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The diagram shows an antibody molecule. Identify A top.
A)
A - Antigen binding site; B - Variable region (of L-Chain); C - Constant region (of L-Chain); D - Light polypeptide chain (L-Chain); E - Heavy polypeptide chain (H-Chain); F - Disulfide (bond)
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B)
A - Antigen binding site; B - Constant region (of L-Chain); C - Variable region (of L-Chain); D - Light polypeptide chain (L-Chain); E - Heavy polypeptide chain (H-Chain); F - Disulfide (bond)
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C)
A - Antigen binding site; B - Variable region (of L-Chain); C - Constant region (of L-Chain); D - Heavy polypeptide chain (L-Chain); E - Light polypeptide chain (H-Chain); F - Hydrogen (bond)
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D)
A - Antigen binding site; B - Variable region (of L-Chain); C - Constant region (of L-Chain); D - Light polypeptide chain (L-Chain); E - Heavy polypeptide chain (H-Chain); F - Hydrogen (bond)
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The copper ions of IUDs
A)
Suppress the motility and fertilization capacity of sperms
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B)
Make the uterus unsuitable for implantation
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C)
Increase phagocytosis of sperms
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D)
Make cervix hostile to sperms
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The transfer of zygote or early embryo (up to 8 blastomere) into fallopian tube is
A)
IVF and ET
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B)
ZIFT
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C)
GIFT
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D)
IUT
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The embryonic membrane involved in the formation of placenta in human is
A)
yolk sac
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B)
allantois
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C)
amnion
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D)
chorion
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Identical twins are produced when
A)
One fertilized egg divides and two blastomeres separate
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B)
One sperm fertilizes two eggs
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C)
One egg is fertilized with two sperms
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D)
Two eggs are fertilized
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Which of the following induces parturition?
A)
Vasopressin
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B)
Oxytocin
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C)
Growth hormone
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D)
Thyroid stimulating hormone
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Jaundice is a disorder of
A)
Excretory system
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B)
Skin and eyes
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C)
Digestive system
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D)
Circulatory system
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Child death may occur in the marriage between
A)
\[R{{h}^{+}}\] man and \[R{{h}^{+}}\] woman
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B)
\[R{{h}^{+}}\] man and \[R{{h}^{-}}\] woman
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C)
\[R{{h}^{-}}\] man and \[R{{h}^{-}}\] woman
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D)
\[R{{h}^{-}}\] man and \[R{{h}^{+}}\] woman
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Continued consumption of a diet rich in butter, red meat and eggs for a long period may lead to
A)
vitamin A toxicity
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B)
kidney stones
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C)
hypercholesterolemia
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D)
urine laden with ketone bodies
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A person who is one along hunger strike and is surviving only on water, will have
A)
less amino acids in his urine
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B)
more glucose in his blood
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C)
less urea in his urine
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D)
more sodium in his urine
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Haemoglobin is having maximum affinity with:
A)
\[N{{H}_{3}}\]
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B)
\[{{O}_{2}}\]
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C)
\[C{{O}_{2}}\]
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D)
\[CO\]
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Which one of the following is a matching pair?
A)
Lubb-Sharp closure of AV valves at the beginning of ventricular systole
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B)
Dup-Sudden opening of semilunar valves at the beginning of ventricular diastole
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C)
Pulsation of the radial artery-Valves in the blood vessels
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D)
Initiation of the heart beat-Purkinje fibres
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Which region of the kidney nephron is the main site of amino acid reabsorption?
A)
glomerulus
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B)
Bowman's capsule
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C)
proximal convoluted tubule
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D)
distal convoluted tubule
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Both cri du chat syndrome and Down's syndrome
A)
are X-linked recessive genetic disorders.
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B)
result from inherited chromosomal abnormalities.
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C)
result from the loss of one entire chromo- some.
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D)
result from the gain of one entire chromo- some.
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In livestock breeding experiments the following stage is transferred to surrogate mothers
A)
Unfertilized eggs
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B)
Fertilized eggs
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C)
8 to 32 celled embryo
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D)
Frozen semen
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The presence of gill slits, in the embryos of all vertebrates, supports the theory of
A)
biogenesis
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B)
recapitulation
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C)
metamorphosis
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D)
organic evolution
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Which of the following has been recently used for increasing productivity of super milk cows?
A)
Artificial insemination by a pedigreed bull only
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B)
Superovulation of a high production cow only
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C)
Embryo transplantation only
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D)
A combination of Superovulation, artificial insemination and embryo transplantation into a 'carrier cow' (surrogate mother)
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The change of the light-coloured variety of peppered moth (Biston betularia) to its darker variety (Biston carbonaria) is due to
A)
mutation
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B)
regeneration
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C)
genetic isolation
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D)
temporal isolation
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A person with the sex chromosomes XXY suffers from
A)
Down's syndrome
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B)
Klinefelter's syndrome
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C)
Turner's syndrome
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D)
Gynandromorphism
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Productivity at the second trophic level is always
A)
greater than the productivity at the first trophic level.
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B)
less than the productivity at the first trophic level.
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C)
equal to the productivity at the first trophic level.
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D)
extremely variable compared to the productivity at the first trophic level.
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The density of a population in a given habitat during a given period, fluctuates due to changes in four basic process. On this basis fill up A and B boxes in the given diagram with correct options
A)
A = Natality + Immigration, B = Mortality + Emigration
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B)
A = Natality + Mortality, B = Immigration + Emigration
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C)
A = Birth rate + Death rate, B= Migration+ Emigration
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D)
A = Natality + Emigration, B = Mortality + Immigration
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Two of the body parts which do not appear in MRI may be
A)
molar teeth and eye lens
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B)
scapula and canines
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C)
ligaments and ribs
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D)
tendons and premolars
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Hormones generally cause a response in a cell by
A)
interacting directly with the cell's DNA.
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B)
binding with a receptor and stimulating protein production.
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C)
changing the polarity of the cell membrane and causing a cascade of events within the cell.
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D)
halting all other cellular activity except the required response
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The largest quantity of air that can be expired after a maximal inspiratory effort is called
A)
residual volume
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B)
tidal volume
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C)
vital capacity
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D)
total lung volume
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The black pigment in the eye which reduces the internal reflection is located in
A)
retina
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B)
iris
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C)
cornea
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D)
sclerotic
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Which one of the following does NOT change in length when a muscle fibre contracts?
A)
I band
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B)
H zone
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C)
A band
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D)
Sarcomere
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Which of the following correctly describes the role of myelin in the nervous system?
A)
Myelin insulates and speeds transmission along dendrites.
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B)
Myelin insulates and speeds transmission along axons.
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C)
Myelin slows down depolarization of an axon.
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D)
All of the above
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Following feedback relationship is seen between three glands and their hormones.
The secretion of 'b is decreased by 'a', secretion of 'c' is increased by 'V while the secretion of 'a' is decreased by 'c'. Increased or decreased amounts of a hormone cause an increase or decrease in the amount of the following hormone in the system. Now if 'a' is added to the system, the secretion of 'c' is
A)
decreased
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B)
increased
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C)
first decreased and then increased
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D)
first increased and then decreased
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Match the following (w.r.t. insert size)
A. Plasmid (i) 9 - 23 kb B. \[\lambda \]phage (ii) 0.5 - 8 kb C. Cosmid (iii) 30 - 40 kb D. BAC (iv) 50 - 300 kb
A)
A-(ii), B-(i), C-(iii), D-(iv)
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B)
A-(i), B-(ii), C-(iii), D-iv)
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C)
A-(ii), B-(i), C-(iv), D-(iii)
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D)
A-(iii), B-(i), C-(ii), D-(iv)
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Which one of the following pairs is incorrect?
A)
Plasmid - small piece of extrachromosomal DNA in bacteria
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B)
Interferon - an enzyme that interferes with DNA replication
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C)
Cosmid - A vector for carrying large DNA fragments into host cells
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D)
Myeloma - antibody producing tumor cells.
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In which one of the following pairs of diseases both are caused by viruses?
A)
Tetanus and typhoid
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B)
Whooping cough and sleeping sickness
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C)
Syphilis and AIDS
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D)
Measles and Rabies
done
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Electroporation procedure involves
A)
fast passage of food through sieve pores in phloem elements with the help of electric stimulation.
done
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B)
opening of stomatal pores during night by artificial light.
done
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C)
making transient pores in the cell membrane to introduce gene constructs.
done
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D)
purification of saline water with the help of a membrane system.
done
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Black water fever is a severe complication of
A)
Plasmodium falcifarum
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B)
P. vivax
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C)
P. malariae
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D)
All the above
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Increased asthmatics attacks in certain seasons are related to
A)
eating fruits preserved in tin containers
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B)
inhalation of seasonal pollen
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C)
low temperature
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D)
hot and humid environment.
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For transformation, micro-particles coated with DNA to be bombarded with gene gun are made up of:
A)
Silver or Platinum
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B)
Platinum or Zinc
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C)
Silicon or Platinum
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D)
Gold or Tungsten
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Which one of the following statements is correct with respect to AIDS?
A)
The HIV can be transmitted through eating food together with an infected person
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B)
Drug addicts are least susceptible to HIV infection.
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C)
AIDS patients are being fully cured with proper care and nutrition
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D)
The causative HIV retro-virus enters helper T-lymphocytes thus reducing their numbers.
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