Two cylinders A and B fitted with pistons contain equal amounts of an ideal diatomic gas at 300 K. The piston of A is free to move while that of B is held fixed. The same amount of heat is given to the gas in each cylinder. If the rise in temperature of the gas in A is 30 K, then the rise in temperature of the gas in B is:
A)
30 K
done
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B)
18 K
done
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C)
50 K
done
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D)
42 K
done
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Eight equal drops are falling through air each with a steady velocity of 5 cm/s. If the drops coalesce, the terminal velocity of the new drop will be
A)
10 cm/s
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B)
15 cm/s
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C)
20 cm/s
done
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D)
40 cm/s
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A flat plate of area \[10\text{ }c{{m}^{2}}\] is separated from a large plate by a layer of glycerine 1 mm thick. If the coefficient of viscosity of gylcerine is 20 poise, the force required to keep the plate moving with a velocity of 1 cm/sec is:
A)
80 dynes
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B)
200 dynes
done
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C)
800 dynes
done
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D)
2000 dynes
done
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The reading of a spring balance when a block is suspended from it in air is 60 Newton. This reading is changed to 40 Newton when the block is submerged in water. The specific gravity of the block must therefore be:
A)
3
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B)
2
done
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C)
6
done
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D)
\[\frac{3}{2}\]
done
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A 3 kg ball strikes a heavy rigid wall with a speed of 10 m/s at an angle of \[60{}^\circ \]. It gets reflected with the same speed and angle as shown in figure. If the ball is in contact with the wall for 0.2 sec, what is the average force exerted on the ball by the wall?
A)
0
done
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B)
150 N
done
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C)
\[150\sqrt{3}\,N\]
done
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D)
300 N
done
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A block rests on a rough inclined plane making an angle of \[30{}^\circ \] with the horizontal. The coefficient of static friction between the block and the plane is 0.8. If the frictional force on the block is ION, the mass of the block is (take\[g=10\text{ }m/{{s}^{2}}\])
A)
2.0 kg
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B)
4.0 kg
done
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C)
1.6kg
done
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D)
2.5kg
done
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particles of masses 2 kg each are placed such that the first lies on -ve \[x-\]axis, 2nd one lies on -ve y-axis and the third one lies on +ve z-axis at distances of 2 m, 3 m, and 1 m respectively from the origin. Then the square of the distance of the center of mass of the system from the origin is:
A)
\[1.55\,{{m}^{2}}\]
done
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B)
\[\sqrt{{}}(1.55){{m}^{2}}\]
done
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C)
\[1.55\,m\]
done
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D)
\[1.25\,{{m}^{2}}\]
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A uniform rod AB of mass m and length 2a is falling freely without rotation under gravity with AB horizontal. Suddenly the end A is fixed when the speed of the rod is u. The angular speed with which the rod begins to rotate is:
A)
\[\frac{u}{2a}\]
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B)
\[\frac{4u}{3a}\]
done
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C)
\[\frac{u}{3a}\]
done
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D)
\[\frac{3u}{4a}\]
done
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View Answer play_arrow
A potential difference of 1000 V is applied across an X - ray tube. The ratio of the de-Broglie wavelength of the incident electrons to the shortest wavelength of X - rays produced is (Take\[\frac{e}{m}=1.8\times {{10}^{14}}C/kg\]) for an electron.
A)
\[\frac{1}{20}\]
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B)
\[\frac{1}{100}\]
done
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C)
1
done
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D)
\[\frac{1}{{{10}^{4}}}\]
done
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View Answer play_arrow
The probability of survival of a radioactive nucleus for one mean life is
A)
\[\frac{1}{e}\]
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B)
\[1-\frac{1}{e}\]
done
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C)
\[\frac{\ln \,2}{3}\]
done
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D)
\[1-\frac{\ln \,2}{e}\]
done
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If \[\vec{E}\]and \[\vec{B}\]are the electric and magnetic field vectors of electromagnetic waves then the direction of propagation of electromagnetic wave is along the direction of
A)
\[\vec{E}\]
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B)
\[\vec{B}\]
done
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C)
\[\vec{E}\times \vec{B}\]
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D)
None of these.
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View Answer play_arrow
In a common emitter amplifier, input resistance is \[3\Omega \] and load resistance is \[24\Omega .\]What is the voltage gain? (Take\[\alpha =0.6\])
A)
8.4
done
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B)
4.8
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C)
2.4
done
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D)
1.2
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The displacement of a particle varies according to the relation \[x=4(\cos \pi t+\sin \pi t)\]The amplitude of the particle is:
A)
8
done
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B)
-4
done
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C)
4
done
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D)
\[4\sqrt{2}\]
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A body takes time t to reach the bottom of an inclined plane of angle \[\theta \] with the horizontal. If the plane is made rough, time taken now is 2t. The coefficient of friction of the rough surface is
A)
\[\frac{3}{4}\tan \theta \]
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B)
\[\frac{1}{2}\tan \theta \]
done
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C)
\[\frac{2}{3}\tan \theta \]
done
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D)
\[\frac{1}{4}\tan \theta \]
done
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In the given figure, the sphere rolls without slipping on the plank which is moving with constant velocity \[{{v}_{0}}.\]The radius and angular velocity of the sphere is r and \[\omega \]respectively. The velocity of center of mass of the sphere is:
A)
\[{{v}_{0}}+r\omega \]
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B)
\[{{v}_{0}}-r\omega \]
done
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C)
\[r\omega \]
done
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D)
\[{{v}_{0}}\]1
done
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View Answer play_arrow
Two particles of masses\[{{m}_{1}}\]and\[{{m}_{2}}\]in projectile motion have velocities\[{{\vec{u}}_{1}}\]and \[{{\vec{u}}_{2}}\]respectively at time\[t=0.\]They collide at time\[{{t}_{0}}.\]Their velocities become\[{{\vec{v}}_{1}}\]and \[{{\vec{v}}_{2}}\]at time \[2{{t}_{0}}\]while still moving in air. The value of\[\left| ({{m}_{1}}{{{\vec{v}}}_{1}}+{{m}_{2}}{{{\vec{v}}}_{2}})-({{m}_{1}}{{{\vec{v}}}_{1}}+{{m}_{2}}{{{\vec{v}}}_{2}}) \right|\]
A)
0
done
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B)
\[({{m}_{1}}+{{m}_{2}})g{{t}_{0}}\]
done
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C)
\[2({{m}_{1}}+{{m}_{2}})g{{t}_{0}}\]
done
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D)
\[\frac{1}{2}({{m}_{1}}+{{m}_{2}})g{{t}_{0}}\]
done
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View Answer play_arrow
A gas in a container is compressed suddenly. Its temperature would
A)
increase
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B)
decrease
done
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C)
stay constant
done
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D)
charge depending upon surrounding temp.
done
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View Answer play_arrow
20 Joule of work is done on a gas when it is compressed suddenly. If the charge is adiabatic, the internal energy of the gas would increase by
A)
20 J
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B)
40 J
done
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C)
100 J
done
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D)
zero
done
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A network of four capacitors of capacity equal to \[{{C}_{1}}={{C}_{1}}=2C,\,{{C}_{3}}=3C\]and\[{{C}_{4}}=4C\]are connected to in a battery as shown in the figure. The ratio of the charges on \[{{C}_{2}}\]and \[{{C}_{4}}\]is:
A)
\[\frac{22}{3}\]
done
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B)
\[\frac{3}{22}\]
done
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C)
\[\frac{7}{4}\]
done
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D)
\[\frac{4}{7}\]
done
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View Answer play_arrow
A hollow sphere of radius 1R is charged to volt, V and another smaller sphere of radius, R is charged to V/2 volt. Then the smaller sphere is placed inside the bigger sphere without changing the net charge on each sphere. The potential difference between the two spheres would be:
A)
\[3\frac{V}{2}\]
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B)
\[\frac{V}{4}\]
done
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C)
\[\frac{V}{2}\]
done
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D)
V
done
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View Answer play_arrow
Two batteries of emf 4 V and 8 V with internal resistance\[1\Omega \] and \[2\Omega \]are connected in a circuit with a resistance of \[9\Omega \] as shown in figure. The current and potential difference between the points P and Q are:
A)
\[\frac{1}{3}A\]and\[3V\]
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B)
\[\frac{1}{6}A\] and\[4V\]
done
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C)
\[\frac{1}{9}A\] and\[9V\]
done
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D)
\[\frac{1}{2}A\] and\[12V\]
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The current-voltage graphs for a given metallic wire at two different temperatures \[{{T}_{1}}\] and \[{{T}_{2}}({{T}_{2}}>{{T}_{1}})\] would be:
A)
done
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B)
done
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C)
done
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D)
done
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An electron beam is moving between two parallel plates having electric field \[1.125\times {{10}^{-6}}\,V/m.\] A magnetic field \[3\times {{10}^{-10}}T\] is also applied, so that beam of electrons does not deflect. The velocity of the electron is:
A)
4225 m/s
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B)
3750 m/s
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C)
2750 m/s
done
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D)
3200 m/s
done
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In the given figure, the loop is fixed but straight wire can move. The straight wire will:
A)
remain stationary
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B)
move towards the loop
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C)
move away from the loop
done
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D)
rotates about the axis
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View Answer play_arrow
A conducting square loop of side\[\ell \]and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A uniform and constant magnetic field B exists along the perpendicular to the plane of the loop as shown in figure. The current induced in the loop is:
A)
\[\frac{B\ell v}{R}\]clockwise
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B)
\[\frac{B\ell v}{R}\]anticlockwise
done
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C)
\[\frac{2B\ell v}{r}\]anticlockwise
done
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D)
0
done
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View Answer play_arrow
In a series circuit C = 2 fiF, L = 1 mH and R = 10Q, when the current in the circuit is maximum, at that time the ratio of the energies stored in the capacitor and the inductor will be
A)
1 : 1
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B)
1 : 2
done
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C)
2 : 1
done
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D)
1 : 5
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A person moves 30 m north and then 20 m towards east and finally \[30\sqrt{2}\,m\]in south west direction. The displacement of the person from the origin will be
A)
10 m along north
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B)
10 m along south
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C)
10 m along west
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D)
0.
done
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A body moves along a circular track of radius R. It starts from a point on the circular track, moves along the circular track and completes half a revolution. Find the ratio of its average speed to the magnitude of its average velocity
A)
\[\frac{2}{\pi }\]
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B)
\[\frac{3\pi }{2}\]
done
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C)
\[\frac{\pi }{2}\]
done
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D)
\[2\pi \]
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If \[\left| \vec{A}-\vec{B} \right|=\left| {\vec{A}} \right|=\left| {\vec{B}} \right|,\]the angle between A and B is
A)
\[60{}^\circ \]
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B)
\[0{}^\circ \]
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C)
\[120{}^\circ \]
done
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D)
\[90{}^\circ \]
done
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View Answer play_arrow
The angle between \[\vec{A}+\vec{B}\]and \[\vec{A}\times \vec{B}\] is
A)
0
done
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B)
\[\frac{\pi }{2}\]
done
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C)
\[\pi \]
done
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D)
\[\frac{\pi }{4}\]
done
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A body of mass 0.5 kg is projected under gravity with a speed of 98 m/s at an angle of \[30{}^\circ \] with the horizontal. The magnitude of its change in momentum is
A)
24.5 N-s
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B)
49.0 N-s
done
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C)
98.0 N-s
done
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D)
50.0 N-s
done
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A body is projected vertically upwards at time t = 0 and it is seen at a height Hat instants \[{{t}_{1}}\]and\[{{t}_{2}}\]seconds during its flight. The maximum height is
A)
\[\frac{g{{({{t}_{2}}-{{t}_{1}})}^{2}}}{8}\]
done
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B)
\[\frac{g{{({{t}_{2}}+{{t}_{1}})}^{2}}}{4}\]
done
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C)
\[\frac{g{{({{t}_{2}}+{{t}_{1}})}^{2}}}{8}\]
done
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D)
\[\frac{g{{({{t}_{2}}-{{t}_{1}})}^{2}}}{4}\]
done
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View Answer play_arrow
Consider the arrangement shown in figure where two blocks are connected by a uniform rope of mass 4 kg. The arrangement is lifted up vertically by a constant vertical force of magnitude 150 N. The ratio of tension in the rope at A to that at B would be
A)
2
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B)
4
done
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C)
\[\frac{3}{4}\]
done
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D)
\[\frac{5}{4}\]
done
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View Answer play_arrow
A load of mass M = 1000 kg is supported in a vertical plane by a string and pulleys. If the free end A of the string is pulled vertically downward with an acceleration of \[4\text{ }cm/{{s}^{2}},\] the tension in the string is
A)
1000 N
done
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B)
3000 N
done
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C)
4000 N
done
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D)
5000 N
done
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View Answer play_arrow
A uniform chain of mass m hangs from a light pulley, with unequal lengths of the chain hanging from the two sides of the pulley. The force exerted by the moving chain on the pulley is
A)
mg
done
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B)
<mg
done
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C)
>mg
done
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D)
variable
done
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View Answer play_arrow
The mass m is placed on a body of mass M. There is no friction anywhere. The force F is applied on M and it moves with acceleration a. Then the force on the top body is:
A)
F
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B)
ma
done
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C)
F - ma
done
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D)
None of these
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View Answer play_arrow
A lift is moving down with acceleration a. A man in the lift drops a ball inside the lift. The acceleration of the ball as observed by the man in the lift and a man standing stationary on the ground respectively:
A)
\[g,g\]
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B)
\[g-a,\,g-a\]
done
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C)
\[g-a,\,g\]
done
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D)
\[a,g\]
done
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View Answer play_arrow
A tube of length L is filled completely with an incompressible liquid of mass M and closed at both ends. The tube is then rotated in a horizontal plane about one of its ends with a uniform angular velocity. The force exerted by the liquid at the other end is:
A)
\[\frac{ML{{\omega }^{2}}}{2}\]
done
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B)
\[ML{{\omega }^{2}}\]
done
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C)
\[\frac{ML{{\omega }^{2}}}{4}\]
done
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D)
\[\frac{M{{L}^{2}}{{\omega }^{2}}}{2}\]
done
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View Answer play_arrow
When forces \[{{F}_{1}},{{F}_{2}}\]and \[{{F}_{3}},\]are acting on a particle of mass m such that\[{{F}_{2}}\]and\[{{F}_{3}}\]are mutually perpendicular, then the particle remains stationary. If the force \[{{F}_{1}}\]is now removed then the acceleration of the particle is:
A)
\[\frac{{{F}_{1}}}{m}\]
done
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B)
\[\frac{{{F}_{2}}{{F}_{3}}}{m{{F}_{1}}}\]
done
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C)
\[\frac{({{F}_{2}}-{{F}_{3}})}{m}\]
done
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D)
\[\frac{{{F}_{3}}}{m}\]
done
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View Answer play_arrow
An object is placed at a distance of 10 cm from a co-axial combination of two lenses A and B in contact. The combination forms a real image three times the size of the object. If lens B is concave with a focal length of 30 cm, what is the nature and focal length of lens A?
A)
Convex, 12 cm
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B)
Concave, 12 cm
done
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C)
Convex, 6 cm
done
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D)
Convex, 18 cm
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View Answer play_arrow
A plano-convex lens acts like a concave mirror of 28 cm focal length when its plane surface is silvered and like a concave mirror of 10 cm focal length when its curved surface is silvered. What is the refractive index of the material of the lens?
A)
1.50
done
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B)
1.55
done
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C)
1.60
done
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D)
1.65
done
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View Answer play_arrow
In the expression \[A={{A}_{0}}{{e}^{-a/kT}},\]is Boltzmann constant and T is the absolute temperature. The dimensions of a are the same as those of.
A)
energy
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B)
time
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C)
acceleration
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D)
velocity
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View Answer play_arrow
If \[{{\ell }_{1}}\]and \[{{\ell }_{2}}\]are the length of an column for the first and second Resonance when a turning fork of frequency n is sounded on a resonance tube, then the distance of the anti-node from the top end of the resonance tube is
A)
\[2({{\ell }_{1}}-{{\ell }_{1}})\]
done
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B)
\[\frac{1}{2}(2{{\ell }_{1}}-{{\ell }_{2}})\]
done
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C)
\[\frac{{{\ell }_{2}}-3{{\ell }_{1}}}{2}\]
done
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D)
\[\frac{{{\ell }_{1}}-{{\ell }_{2}}}{2}\]
done
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View Answer play_arrow
The radius of second orbit of an electron in hydrogen atom is 2. 116 A. The de-Broglie wavelength associated with this electron in this orbit would be:
A)
\[6.64\text{ }\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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B)
\[~1.058\text{ }\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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C)
\[2.116\text{ }\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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D)
\[~13,28\text{ }\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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View Answer play_arrow
A spherical hole is made in a solid sphere of radius R. The mass of the sphere before hollowing was M. The gravitational field at the center of the hole due to the remaining mass is:
A)
0
done
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B)
\[\frac{GM}{8{{R}^{2}}}\]
done
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C)
\[\frac{GM}{2{{R}^{2}}}\]
done
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D)
\[\frac{GM}{{{R}^{2}}}\]
done
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View Answer play_arrow
According to Heisenberg's uncertainty principle, the product of uncertainties in position and velocities for an electron of mass \[9.1\times {{10}^{-31}}\,kg\]is
A)
\[3.8\times {{10}^{-5}}{{m}^{2}}{{s}^{-1}}\]
done
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B)
\[6.8\times {{10}^{-3}}{{m}^{2}}{{s}^{-1}}\]
done
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C)
\[5.8\times {{10}^{-5}}{{m}^{2}}{{s}^{-1}}\]
done
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D)
\[1.8\times {{10}^{-4}}{{m}^{2}}{{s}^{-1}}\]
done
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View Answer play_arrow
The state of hybridization of B in\[BC{{l}_{3}}\]is
A)
\[sp\]
done
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B)
\[~s{{p}^{2}}\]
done
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C)
\[~s{{p}^{3}}\]
done
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D)
\[~s{{p}^{2}}{{d}^{2}}\]
done
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View Answer play_arrow
If 20 g of a solute was dissolved in 500 ml of water and osmotic pressure of the solution was found to be 600 mm of Hg at \[15{}^\circ C\] , then molecular weight of the solute is
A)
900
done
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B)
1200
done
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C)
1100
done
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D)
1600
done
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View Answer play_arrow
The significant figures in 3400 are
A)
2
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B)
0
done
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C)
4
done
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D)
8
done
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View Answer play_arrow
For a Car not engine, the source is at 500 K and the sink is at 300 K. What is the efficiency of this engine?
A)
1.2
done
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B)
0.4
done
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C)
0.9
done
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D)
0.3
done
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View Answer play_arrow
Work done during isothermal expansion of one mole of an ideal gas form 10 atm to 1 atm at 300 K is
A)
2.938.6 Joules
done
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B)
1.138.8 Joules
done
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C)
5.744.1 Joules
done
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D)
7342.2 Joules
done
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View Answer play_arrow
The number of the sodium atoms in 2 moles of sodium Ferro cyanide is
A)
\[~10\times {{10}^{23}}\]
done
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B)
\[~35\times {{10}^{23}}\]
done
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C)
\[~28\times {{10}^{23}}\]
done
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D)
\[~48\times {{10}^{23}}\]
done
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View Answer play_arrow
According to Bohr's principle, the relation between principle quantum number (n) and radius of orbit is
A)
\[r\propto n\]
done
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B)
\[r\propto {{n}^{2}}\]
done
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C)
\[r\propto 1/n\]
done
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D)
\[r\propto 1/{{n}^{2}}\]
done
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View Answer play_arrow
For an exothermic reaction, the value of
A)
\[\Delta E \] is positive
done
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B)
\[\Delta E\] is negative
done
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C)
\[\Delta H\] is negative
done
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D)
\[\Delta H\] is equal to zero
done
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View Answer play_arrow
Wolframite ore is separated from tinstone ore by the process of
A)
Roasting
done
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B)
Electromagnetic separation
done
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C)
Calcinations
done
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D)
Smelting
done
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View Answer play_arrow
If equilibrium constant of reaction, \[{{N}_{2}}+{{O}_{2}}2NO\]is \[{{K}_{1}},\] And \[\frac{1}{2}{{N}_{2}}+\frac{1}{2}{{O}_{2}}NO\]is\[{{K}_{2}},\] then
A)
\[{{K}_{1}}=2{{K}_{2}}\]
done
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B)
\[{{K}_{2}}=\sqrt{{{K}_{2}}}\]
done
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C)
\[{{K}_{1}}={{K}_{2}}\]
done
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D)
\[{{K}_{1}}=\frac{1}{2}{{K}_{2}}\]
done
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View Answer play_arrow
The number of lattice arrangements in different crystal systems are
A)
10
done
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B)
8
done
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C)
3
done
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D)
14
done
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View Answer play_arrow
If solubility product of \[HgS{{O}_{4}}\]is\[6.4\times {{10}^{-5}}\] then its solubility is
A)
\[8\times {{1}^{-3}}\,\text{mol/litre}\]
done
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B)
\[2.2\times {{10}^{-5}}\,\text{mol/litre}\]
done
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C)
\[4.2\times {{10}^{-4}}\,\text{mil/litre}\]
done
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D)
\[1.4\times {{10}^{-8}}\,\text{mol/litre}\]
done
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View Answer play_arrow
Disintegration constant for a radioactive substance is \[0.58\,h{{r}^{-1}}.\]Its half-life period is
A)
6.2 hr
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B)
2.3 hr
done
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C)
1.2 hr
done
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D)
4.6 hr
done
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View Answer play_arrow
The maximum number of hydrogen bonds formed by a water molecular in ice is
A)
0
done
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B)
5
done
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C)
7
done
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D)
3
done
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View Answer play_arrow
A cylinder of 5 litre capacity, filled with air at N. T. P is connected with another evacuated cylinder of 30 litre of capacity. The resultant air pressure in both the cylinder will be
A)
10.8 cm of Hg
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B)
18.9 cm of Hg
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C)
28.8 cm of Hg
done
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D)
39.9 cm of Hg
done
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View Answer play_arrow
The rate constant of a reaction depends upon
A)
Time of reaction
done
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B)
Extent of reaction
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C)
Temperature of the system
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D)
Concentration of the system
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View Answer play_arrow
The volume strength of\[1.5\,N\,{{H}_{2}}{{O}_{2}}\]solution is
A)
8.4 litres
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B)
2.2 litres
done
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C)
5.5 litres
done
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D)
3.9 litres
done
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View Answer play_arrow
The chemical formula of diammine silver (I) chloride is
A)
\[[Ag{{(N{{H}_{3}})}_{2}}]Cl\]
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B)
\[[Ag{{(N{{H}_{3}})}_{2}}]Cl\]
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C)
\[[Ag(N{{H}_{3}})]Cl\]
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D)
\[{{[Ag(N{{H}_{4}})]}_{2}}Cl\]
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View Answer play_arrow
Acetone reacts with iodine to form iodoform in the presence of
A)
\[KOH\]
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B)
\[NaOH\]
done
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C)
\[MgC{{O}_{3}}\]
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D)
\[~CaC{{O}_{3}}\]
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When a substance is dissolved in a solvent the vapour pressure of that solvent decreases. It brings
A)
A decrease in freezing point of the solution
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B)
An increase in boiling point of the solution
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C)
A decrease in boiling point of the solution.
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D)
An increase in freezing point of the solution
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View Answer play_arrow
When alkyl halide is heated with dry \[A{{g}_{2}}O,\]it produces
A)
Ketone
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B)
Ether
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C)
Ester
done
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D)
Alcohol
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View Answer play_arrow
Which of the following is used widely in the man facturing of lead storage battery?
A)
Bismuth
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B)
Arsenic
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C)
Lithium
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D)
Antimony
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View Answer play_arrow
Which of the following has the highest first ionization energy?
A)
B
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B)
Li
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C)
Be
done
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D)
C
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View Answer play_arrow
The IUPAC name of the compound \[C{{H}_{3}}-C{{H}_{2}}-\overset{OC{{H}_{3}}}{\mathop{\overset{|}{\mathop{CH}}\,}}\,-C{{H}_{2}}-OH\]
A)
2-methoxy-1 -butanol
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B)
2-methoxy-1-butanol
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C)
1, 2-methoxy-butanol
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D)
3 -methoxy-1 -butanol
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View Answer play_arrow
By annealing, steel
A)
Becomes soft
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B)
Becomes hard and brittle
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C)
Is covered with a thin film of\[F{{e}_{3}}{{O}_{4}}\]
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D)
Becomes liquid
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View Answer play_arrow
Which of the following acid is formed when \[Si{{F}_{4}}\]reacts with water?
A)
\[{{H}_{2}}S{{O}_{4}}\]
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B)
\[{{H}_{2}}Si{{F}_{4}}\]
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C)
\[Si{{F}_{4}}\]
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D)
\[{{H}_{2}}Si{{F}_{6}}\]
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View Answer play_arrow
How many atoms of calcium will be deposited from a solution of \[CaC{{l}_{2}}\]by a current of 5 mA flowing for 60 seconds?
A)
\[4.68\times {{10}^{18}}\]
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B)
\[~4.68\times {{10}^{9}}\]
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C)
\[~6.46\times {{10}^{14}}\]
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D)
\[~4.68\times {{10}^{23}}\]
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View Answer play_arrow
In the reaction \[A{{g}_{2}}O+{{H}_{2}}{{O}_{2}}\to 2Ag+{{H}_{2}}O+{{O}_{2}},\]the\[{{H}_{2}}{{O}_{2}}\]acts as
A)
Reducing agent
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B)
Bleaching agent
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C)
Oxidizing agent
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D)
None of the above
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View Answer play_arrow
Iron pipes, lying in acidic soil are often attached the blocks of magnesium for their protection from rusting, because magnesium
A)
Forms a corrosion-resistant alloy with iron
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B)
Is readily converted into positive ion iron.
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C)
Prevents air from reaching the surface of iron
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D)
Is higher than iron.
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View Answer play_arrow
Which of the following statements is correct with respect to the property of elements with an increase in atomic number in the carbon family (group 14)?
A)
Metallic character decreases
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B)
Atomic size decreases
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C)
lionization energy increases
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D)
Stability of +2 oxidation state increases
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View Answer play_arrow
Phenol can be converted into salicylaldehyde by
A)
Perkin reaction
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B)
Cannizzaro reaction
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C)
Etard reaction
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D)
Reimer-Tiemann reaction
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View Answer play_arrow
The most efficient agent for the absorption of \[S{{O}_{3}}\]is
A)
\[50%\,{{H}_{2}}S{{O}_{4}}\]
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B)
\[98%\,{{H}_{2}}S{{O}_{4}}\]
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C)
\[80%\,{{H}_{2}}S{{O}_{4}}\]
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D)
\[10%\,{{H}_{2}}S{{O}_{4}}\]
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View Answer play_arrow
Alkaline earth metals are denser than alkali metals, because metallic bonding in alkaline earth metal is
A)
Stronger
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B)
Not present
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C)
Weaker
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D)
Volatile
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View Answer play_arrow
Toluene is oxidized to benzoic acid by
A)
\[KMn{{O}_{4}}\]
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B)
\[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]
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C)
\[{{H}_{2}}S{{O}_{4}}\]
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D)
Both and
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View Answer play_arrow
Methane and ethane both can be prepared in one step by which of the following compound?
A)
\[{{C}_{2}}{{H}_{4}}\]
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B)
\[C{{H}_{3}}C{{H}_{2}}OH\]
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C)
\[C{{H}_{3}}Br\]
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D)
\[C{{H}_{3}}O\]
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View Answer play_arrow
Boron halides behave as Lewis base, because of their
A)
Covalent nature
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B)
Ionic nature
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C)
Acidic nature
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D)
Electron deficient nature
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View Answer play_arrow
Which of the following oil is obtained from benzene after fractional distillation of coal tar?
A)
Light oil
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B)
Anthracene oil
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C)
Heavy oil
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D)
Middle oil
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View Answer play_arrow
A biological catalyst is essentially
A)
An enzyme
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B)
An amino acid
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C)
A carbohydrate
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D)
A nitrogen compound
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View Answer play_arrow
Which of the following is the strongest base
A)
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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
Which of the following is the most stable compound?
A)
\[P{{h}_{3}}\overset{+}{\mathop{C}}\,\]
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B)
\[P{{h}_{2}}\overset{+}{\mathop{C}}\,{{H}_{2}}\]
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C)
\[P{{h}_{2}}\overset{+}{\mathop{C}}\,H\]
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D)
\[Ph\overset{+}{\mathop{C}}\,{{H}_{2}}\]
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View Answer play_arrow
Azo dyes are prepared from
A)
Phenol
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B)
Benzoic acid
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C)
Aniline
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D)
Benzaldehyde
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View Answer play_arrow
Haemoglobin is an example of
A)
Glycoprotein
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B)
Blood
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C)
Fibrous protein
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D)
Globular protein
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View Answer play_arrow
The complex combustion of \[C{{H}_{4}}\]gives
A)
\[CO+{{N}_{2}}O\]
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B)
\[CO+{{H}_{2}}\]
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C)
\[C{{O}_{2}}+{{H}_{2}}O\]
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D)
\[CO+{{N}_{2}}\]
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View Answer play_arrow
When glucose reacts with bromine water, the main product is
A)
Saccharin acid
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B)
Acetic acid
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C)
Glyceraldehydes
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D)
Gluconic acid.
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View Answer play_arrow
In the reaction \[C{{H}_{3}}CN+2H\xrightarrow[Either]{HCl}X\xrightarrow[{{H}_{2}}O]{Boiling}Y:\] The term Y is?
A)
Ethyl amine
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B)
Dimethyl amine
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C)
Acetaldehyde
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D)
Acetone
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View Answer play_arrow
In elastomer, intermolecular forces are
A)
Strong
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B)
Weak
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C)
Nil
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D)
Very strong
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View Answer play_arrow
Which of the following is industrially prepared by passing ethylene into hypochlorous acid?
A)
Ethylene glycol
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B)
Ethane
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C)
Ethylene dinitrate
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D)
Ethylene oxide
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View Answer play_arrow
A primary amine is formed as an amide by the treatment of bromine and alkali. The primary amine has
A)
1 carbon atom less than amide.
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B)
1 hydrogen atom more than amide.
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C)
1 carbon atom more than amide.
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D)
1 hydrogen atom less than amide.
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View Answer play_arrow
A reagent used to test for unsaturation of alkene is
A)
Ammoniacal \[AgN{{O}_{3}}\]
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B)
Concentrated \[{{H}_{2}}S{{O}_{4}}\]
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C)
Ammoniacal\[C{{u}_{2}}C{{l}_{2}}\]
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D)
Solution of \[B{{r}_{2}}\]in \[CC{{l}_{4}}\]
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View Answer play_arrow
Which is the incorrect statement about water hyacinth?
A)
Introduced in India for their lovely flowers and shape of leaves.
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B)
It is worlds the most problematic terrestrial weed.
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C)
It reproduces asexually through offsets.
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D)
Its botanical name is Eichhornia eras sip es.
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View Answer play_arrow
Select the odd one out
A)
Tuber
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B)
Rhizome
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C)
Bulbil
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D)
Zoospores
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View Answer play_arrow
Most wild mammals are
A)
Continuous breeder
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B)
Seasonal breeder
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C)
Continuous for half year, seasonal for next half year
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D)
None of these
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View Answer play_arrow
Internal fertilization is seen in
A)
Bryophytes
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B)
Pteridophytes
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C)
Gymnosperm and Angiosperm
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D)
All of these
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View Answer play_arrow
Identify A and B in the below figure?
A)
A: Anther, B: Sepals
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B)
A: Petals, B: Anther
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C)
A: Stamen, B: Carpel
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D)
A: Pistil, B: Stamen
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View Answer play_arrow
After fertilization in angiosperms, ovules develop into
A)
Pericarp
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B)
Fruit
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C)
Seed
done
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D)
Embryo
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View Answer play_arrow
Biologist consider flowers to be objects of
A)
Morphological marvels
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B)
Embryological marvels
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C)
Sites of sexual reproduction
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D)
All the above
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View Answer play_arrow
What is A, B, C and D the below figure?
A)
A: Thalamus, B: Style, C: Ovary, D: Stigma
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B)
A: Style, B: Ovary, C: Stigma, D: Thalamus
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C)
A: Stigma, B: Style, C: Ovary, D: Thalamus
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D)
A: Ovary, B: Stigma, C: Thalamus, D: Style
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View Answer play_arrow
Intine of pollen grain is
A)
Inner layer of pollen grain
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B)
A thin and continuous layer
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C)
Made up of cellulose and pectin
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D)
All are correct
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View Answer play_arrow
Match the following:
Column - I Column - II (A) Vegetative cell (1) Sporopollenin (B) Generative cell (2) Spindle-shaped cell (C) Exine (3) Large sized and has abundant food reserve (D) Intine (4) Cellulose and pectin
A)
A:1, B:2, C:3, D:4
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B)
A:4, B:3, C:2, D:1
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C)
A:3 B:2, C:1, D:4
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D)
A:2, B:1, C:4, D:3
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View Answer play_arrow
The landing platform for pollen grains is
A)
Stigma
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B)
Style
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C)
Ovary
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D)
None of the above
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View Answer play_arrow
How many embryo sacs are present in an ovule?
A)
One embryo sac
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B)
More than one embryo sac
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C)
One embryo sac (Generally)
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D)
Two embryo sacs
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View Answer play_arrow
Male germ cells are known as
A)
Sperms
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B)
Spermatogonia
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C)
Spermatid
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D)
Sertoli cells
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View Answer play_arrow
Which one of the following is not an accessory male duct in context of male reproductive system?
A)
Rete testis
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B)
Testes
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C)
Epididymis
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D)
Vas deferens
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View Answer play_arrow
The clitoris is a tiny ____ shaped structure which lies above the urethral opening.
A)
Flagellated
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B)
Finger like
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C)
Bean shaped
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D)
Pear
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View Answer play_arrow
The average time span of human gestation is
A)
8 months
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B)
9 months
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C)
10 months
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D)
1 year
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View Answer play_arrow
Each testis has how many testicular tubules?
A)
200
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B)
250
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C)
300
done
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D)
150
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View Answer play_arrow
Which of the following undergoes unequal division?
A)
Primary oocyte
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B)
Pollen grain of Angiosperm
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C)
Yeast cell during bud formation
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D)
All
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View Answer play_arrow
In context of reproductive health, STD stands for
A)
Sexually Terminal Disease
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B)
Sexually Transmitted Disease
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C)
Sexually Transformed Disease
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D)
(s) Sexually Transducted Disease
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View Answer play_arrow
?Pills' have to be taken for contraception continuously for a period of ____ days.
A)
22
done
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B)
21
done
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C)
24
done
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D)
25
done
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View Answer play_arrow
Under ZIFT procedure, zygote or embryo with up to 8 blastomeres can be transferred into the
A)
Uterus
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B)
Placenta
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C)
Fallopian tube
done
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D)
Cervix
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View Answer play_arrow
Every _____ person in the world is an Indian.
A)
4th
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B)
6th
done
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C)
8th
done
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D)
10th
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View Answer play_arrow
Which of the following infection can be transmitted by sharing of injection needles, surgical instruments, etc., with infected persons; through transfusion of blood or from an infected mother to the foetus?
A)
AIDS
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B)
Hepatitis B
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C)
Genital herpes
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D)
Both (a) and (b)
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View Answer play_arrow
Government of India legalized MTP in the year
A)
1970
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B)
1971
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C)
1972
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D)
1973
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View Answer play_arrow
Mendel is famous for his work on
A)
Pisum
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B)
Drosophila
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C)
Neurospora
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D)
Oenothera
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View Answer play_arrow
Which genotype characterizes an organism that is heterozygous for two genes?
A)
RRYy
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B)
RrYY
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C)
RRYY
done
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D)
RrYy
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View Answer play_arrow
Cross between \[{{F}_{1}}\]plant and recessive female plant is called
A)
Back cross
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B)
Test cross
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C)
Out cross
done
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D)
Mutation
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View Answer play_arrow
Crossing over in diploid organism is responsible for
A)
Dominance of genes
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B)
Linkage between genes
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C)
Segregation of alleles
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D)
Recombination of linked allele
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View Answer play_arrow
Predict the characteristics from the following chart.
A)
Character is dominant and carried by \[x\] chromosome
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B)
Character is carried by y chromosome
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C)
Character is sex-linked recessive
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D)
Character is autosomal recessive
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View Answer play_arrow
The failure of segregation of chromatids during cell division cycles results in the gain or loss of a chromosome(s) is called
A)
Aneuploidy
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B)
Polyploidy
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C)
Trisomy
done
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D)
Nullisomy
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View Answer play_arrow
If a certain patient with blood group B requires immediate blood transfusion, the following type can be given to him
A)
O and B
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B)
O and AB
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C)
A and AB
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D)
B and AB
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View Answer play_arrow
The process of making RNA from DNA is termed as
A)
Transaction
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B)
Transformation
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C)
Transcription
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D)
Transduction
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View Answer play_arrow
Uracil is associated with which sugar?
A)
Generally deoxyribose
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B)
Generally ribose
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C)
Only ribose
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D)
Hexose
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View Answer play_arrow
In a nucleosome, histones are organized in which structure?
A)
Octamer
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B)
Hexamer
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C)
Decamer
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D)
Septamer
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View Answer play_arrow
Taylor and his colleagues used which radioactive probe to detect the distribution of newly synthesized DNA in chromosomes?
A)
Thymine.
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B)
Adenine
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C)
Guanine
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D)
Cytosine
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View Answer play_arrow
In bacteria, in context of mRNA which of the following is not true?
A)
Transcription and translocation takes place in different component.
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B)
Post-transcriptional modifications are required.
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C)
Translation occurs after transcription only.
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D)
None of these
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View Answer play_arrow
The codon AUG has dual function as it codes for _____ and also act as a _____ codon.
A)
Phenylalanine, Initiator
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B)
Methionine, Terminator
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C)
Methionine, Regulator
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D)
Methionine, Initiator
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View Answer play_arrow
Millar simulated the early earth conditions in a laboratory by passing electric discharge through a closed flask raising its temperature to \[800{}^\circ C\] and containing
A)
\[C{{H}_{4}}\] and\[{{H}_{2}}\]
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B)
\[~N{{H}_{3}}\]
done
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C)
Water vapour
done
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D)
All
done
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View Answer play_arrow
All these facts are true about the Neanderthal man except
A)
Brain size is 1400 cc.
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B)
Use hides to protect their bodies.
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C)
Lived in east and central Asia between 1,00,000 to 40,000 years ago.
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D)
Their fossils were discovered in Java in 1891.
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View Answer play_arrow
Match the column:
Column I Column II (A) Invertebrates (1) 500 Mya (B) Jawless fish (2) 320 Mya (C) Seaweeds (3) 350 Mya (D) Dryopithecus and Ramapithecus (4) 15 Mya
A)
A: 2, B: 1, C: 4, D: 3
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B)
A: 1, B: 3, C: 2, D: 4
done
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C)
A: 1, B: 4, C: 2, D: 3
done
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D)
A: 4, B: 3, C: 1, D: 2
done
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View Answer play_arrow
Life came from outer space. This theory is called
A)
Spore theory
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B)
Naturalistic theory
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C)
Special creation theory
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D)
Spontaneous generation
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View Answer play_arrow
Analogy is found between
A)
Wings of birds and bats
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B)
Wings of bat and butterfly
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C)
Hands of man and flippers of whale
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D)
Hands of man and forelimbs of horse
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View Answer play_arrow
If you want to see a dinosaur, it would be best to set the controls of your time machine for the
A)
Mesozoic era
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B)
Precambrian era
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C)
Palaeozoic era
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D)
Pleistocene period
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View Answer play_arrow
What is shown in the figure?
A)
Cannabinoid molecule
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B)
Morphine
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C)
Nicotine
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D)
Lobeline
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View Answer play_arrow
The vector of plasmodium is
A)
Male anopheles mosquito
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B)
Female anopheles mosquito
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C)
Aedes Aegypti
done
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D)
Sand worm
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View Answer play_arrow
Wuchereria causes
A)
Acute inflammation
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B)
Chronic inflammation
done
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C)
Bacterial inflammation
done
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D)
Viral inflammation
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View Answer play_arrow
Principle of _____ is based on the property of 'memory' of the immune system.
A)
Passive immunity
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B)
Antigen antibody
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C)
Immunization
done
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D)
Agglutination
done
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View Answer play_arrow
Which structure of the lymph system keeps degenerating from birth to puberty?
A)
Spleen
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B)
Tonsils
done
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C)
Peyer's patches
done
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D)
Thymus
done
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View Answer play_arrow
Tumour is an abnormal mass of
A)
Muscles
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B)
Cells
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C)
Inorganic salts
done
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D)
Cartilaginous membrane
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View Answer play_arrow
In India agriculture accounts for approximate _____ % of India's GDP and employs nearly ____ % of the population.
A)
33, 62
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B)
62, 33
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C)
50, 50
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D)
60, 40
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View Answer play_arrow
In which plant the resistance to yellow mosaic virus and powdery mildew were induced by mutation?
A)
Flat bean
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B)
Abelmoschus esculentus
done
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C)
Mung bean
done
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D)
Pusa A-4
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View Answer play_arrow
Which brassica variety is resistant to white rust?
A)
Pusa sawani
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B)
Pusa komal
done
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C)
Pusa swarnim
done
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D)
Pusa sadabahar
done
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View Answer play_arrow
The sequential steps for breeding are
(A) Screening germ plasm for resistance source (B) Selection and evaluation of hybrid (C) Hybridization of selected parents (D) Testing and release of new varieties
A)
D, C, B, A
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B)
A, B, C, D
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C)
A, C, B, D
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D)
A, C, D, B
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Match the columns.
Column I Column II (1) White revolution (A) Increase in milk production (2) Green revolution (B) Increase in crop production (3) Blue revolution (C) Increase in fish production
A)
A-1, B-2, C-3
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B)
A-2, B-3, C-1
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C)
A-3, B-2, C-1
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D)
A-1, B-3, C-2
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Which of the following is a variety of rice?
A)
Atlas-66
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B)
Himgiri
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C)
Sonalika
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D)
Ratna
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Choose the correct option with regard to statement A and B.
A: Lactic Acid Bacteria (LAB) are responsible for converting milk into curd. B: LAB creates acidic medium necessary to coagulate and fully digest the milk proteins.
A)
Statement A and B are correct.
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B)
Statement A and B are incorrect.
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C)
Statement A is correct but B is incorrect.
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D)
Statement B is correct and A is incorrect.
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The rod shaped bacteria showing flagella are magnified at _____.
A)
\[5\times {{10}^{3}}\]
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B)
\[5\times {{10}^{4}}\]
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C)
\[1.5\times {{10}^{3}}\]
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D)
\[15\times {{10}^{4}}\]
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Sewage is treated in _____.
A)
STD
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B)
STP
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C)
SPT
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D)
SDT
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BOD can be defined as the
A)
Amount of \[C{{O}_{2}}\]consumed if all the inorganic matter in one litre of water is oxidized by bacteria.
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B)
Amount of\[{{O}_{2}}\]consumed if all the organic matter in one decilitre of water is reduced by bacteria.
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C)
Amount of \[{{O}_{2}}\]consumed if all the organic matter in one litre of water is oxidized by bacteria.
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D)
Amount of \[{{O}_{2}}\] consumed if all the inorganic matter in one litre of water is oxidized by bacteria.
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In an anaerobic sludge digester, during digestion process produces gaseous mixture contain following gases.
A)
\[C{{H}_{4}},{{H}_{2}}O,{{O}_{2}}\]
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B)
\[{{C}_{2}}{{H}_{6}},{{H}_{2}}S,C{{O}_{2}}\]
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C)
\[C{{H}_{4}},{{H}_{2}}{{O}_{2}},C{{O}_{2}}\]
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D)
\[C{{H}_{4}},{{H}_{2}}S,C{{O}_{2}}\]
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Methanogens produce certain gases by growing on cellulosic material. What kind of organisms are they?
A)
Fungi
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B)
Algae
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C)
Bacteria
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D)
Lichen
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Select the false statement from the following:
A)
Genetic engineering include techniques to alter the chemistry of genetic material (DNA and RNA).
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B)
Sexual reproduction is more advantageous than asexual reproduction.
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C)
Genetic engineering allows us to introduce desirable set of gene without undesirable gene into the target organism.
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D)
Plasmid is autonomously replicating linear extra chromosomal DNA.
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The way to introduce alien DNA into host cell includes
A)
Disarmed pathogens
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B)
Biolistics or gene gun
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C)
Microinjection
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D)
All the above
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PCR includes
A)
Denaturation
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B)
Annealing
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C)
Extension
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D)
All the above
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Broken ends of two DNA strands are joined by
A)
Exonuclease
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B)
Endonuclease
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C)
DNA ligase
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D)
Gyrases
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Transgenic plants are the ones
A)
Grown in artificial medium after hybridization in the field.
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B)
Produced by a somatic embryo in artificial medium.
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C)
Generated by introducing foreign DNA into a cell and regenerating a plant from the cell.
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D)
Produced after protoplast fusion in artificial medium.
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DNA or RNA segment tagged with radioactive molecules is called
A)
Vector
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B)
Probe
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C)
Clone
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D)
Plasmid
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Food production can be increased by
A)
Agro chemical based agriculture
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B)
Organic agriculture
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C)
Genetic engineering based agriculture
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D)
All the above
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Hepatitis B vaccine is a
A)
First generation vaccine
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B)
Third generation vaccine
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C)
Product of biotechnology
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D)
Both (b) and (c)
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Which of the following is the source of complementary strand in mRNA silencing?
A)
An infection by viruses having RNA genome
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B)
Mobile genetic elements (Transposons)
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C)
Both
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D)
Proteins
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The Bt Toxin is non-toxic to human beings because
A)
The pro Bt Toxin inactivation requires temperature above human body temperature.
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B)
The Bt Toxin recognizes only insect specific target.
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C)
The Bt Toxin formation from pro Bt Toxin requires pH lower than that present in the human stomach.
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D)
Conversion of pro Bt Toxin to Bt Toxin takes place only in highly alkaline conditions.
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First clinical gene therapy was given to a ____ year old girl.
A)
2 year
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B)
6 year
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C)
4 year
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D)
8 year
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Which gene does not appear in photographic film in autoradiography?
A)
Housekeeping gene
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B)
Structural gene
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C)
Mutated gene
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D)
Transcriptionally active gene
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Quercus species are dominant component in
A)
Alpine forests
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B)
Scrub forests
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C)
Temperate deciduous forests
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D)
Tropical rain forests
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The salinity of inland waters is _____.
A)
3
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B)
4
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C)
5
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D)
2
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The activates of animals like foraging, reproductive and migratory depend on
A)
Temperature
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B)
Water
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C)
Light
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D)
Air
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Adaptation includes ____ attribute of an organism.
A)
Behavioural
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B)
Physiological
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C)
Morphological
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D)
All the above
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The symptoms of altitude sickness are
A)
Nausea
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B)
Heart palpitations
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C)
Fatigue
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D)
All the above
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After poaching 3 lions in certain forest of Gujarat only 15 are left in a year. Determine the death rate per capita.
A)
5.000
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B)
0.200
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C)
0.166
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D)
0.800
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Which of the following occupy top vertical strata of forest ecosystem?
A)
Shrubs
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B)
Herbs and grasses
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C)
Tree
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D)
Phytoplankton
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Ocean occupy _____ % of the surface of ear but the productivity of ocean is _____ billion tons.
A)
70, 45
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B)
60, 55
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C)
70, 55
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D)
60, 65
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Plant capture how much of PAR?
A)
2 to 10%
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B)
10 to 20%
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C)
50%
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D)
30%
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If 20 kcal of energy are available at producer level, then how much energy will be transferred to the lion in the food chain: producer\[\to \]deer \[\to \]lion?
A)
0.2 Kcal
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B)
0.02 Kcal
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C)
0.002 Kcal
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D)
2 Kcal
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How many genetically different strain of rice are found in India?
A)
50,000
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B)
5,000
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C)
2,000
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D)
1,000
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Tropical environments, unlike temperate ones are
A)
Less seasonal
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B)
Relatively more constant
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C)
More predictable
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D)
All the above
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Loss of biodiversity in a region may lead to
A)
Decline in plants production.
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B)
Lowered resistance to environmental perturbations such as draught.
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C)
Increased variability in certain ecosystem process such as plants productivity, water use and pest and disease cycle.
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D)
All the above
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Eutrophication occurs because of
A)
\[Ca\] and \[Mg\]
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B)
Nitrogen and phosphorous
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C)
Carbon and oxygen
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D)
\[Hg\] and DDT
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National forest policy (1988) of India has recommended _____ per cent forest cover for the plains and _____ per cent for the hills.
A)
60, 40
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B)
33, 67
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C)
40, 60
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D)
67, 33
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Desertification is a major problem nowadays, mainly due to
A)
Over grazing
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B)
Over-cultivation
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C)
Increased urbanization
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D)
Water logging
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Which international treaty was signed at Montreal (Canada) in 1987 (effective in 1989) to control the emission of ozone depleting substances?
A)
Kyoto Protocol
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B)
Earth Summit
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C)
Montreal Protocol
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D)
All the above
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