question_answer 1) The equation of state of real gas can be expressed as \[\left( P+\frac{a}{{{V}^{2}}} \right)(V-b)=RT\], where P is the pressure, V is the volume, T is the absolute temperature and a, b and R are constants. What are the dimensions of a?
A)
\[[{{M}^{0}}{{L}^{3}}{{T}^{-2}}]\]
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B)
\[[{{M}^{0}}{{L}^{3}}{{T}^{0}}]\]
done
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C)
\[[M{{L}^{-2}}{{T}^{-2}}]\]
done
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D)
\[[M{{L}^{5}}{{T}^{-2}}]\]
done
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question_answer 2)
The velocity versus time curve of a moving point is as given in the figure. The maximum acceleration is:
A)
\[1\text{ }m/{{s}^{2}}\]
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B)
\[4m/{{s}^{2}}\]
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C)
\[2\text{ }m/{{s}^{2}}\]
done
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D)
\[1.5\text{ }m/{{s}^{2}}\]
done
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question_answer 3) The horizontal range of a projectile is \[4\sqrt{3}\] times the maximum height achieved by it, then the angle of projection is:
A)
\[30{}^\circ \]
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B)
\[45{}^\circ \]
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C)
\[60{}^\circ \]
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D)
\[90{}^\circ \]
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question_answer 4) A block slides with a velocity of 10 m/s on a rough horizontal surface. It comes to rest after covering a distance of 50 m. If g is \[10\text{ }m/{{s}^{2}},\] then the coefficient of dynamic friction between the block and surface is:
A)
1
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B)
10
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C)
2
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D)
0.1
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question_answer 5)
A body slides without friction from a height h along a track shown in figure, so that it loops the loop in the vertical plane. If the radius of the loop is R, what should be the minimum value of h in terms of R, so that the body is just able to loop the loop. There is no friction between the body and the track :
A)
h=R
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B)
h = 2R
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C)
\[h=\frac{5}{2}R\]
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D)
h = 4R
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question_answer 6) If g is the acceleration due to gravity on the earths surface, the gain in potential energy of an object of mass m raised from the surface of earth to a height equal to the radius R of the earth is :
A)
\[\frac{1}{4}mgR\]
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B)
mgR
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C)
2mgR
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D)
\[\frac{1}{2}\]mgR
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question_answer 7) A neutron moving with a velocity v, collides elastically with an atom of mass number A. The collision is head on. If the initial kinetic energy of a neutron is e, then the kinetic energy of neutron after the collision is :
A)
\[{{\left( \frac{1+A}{1-A} \right)}^{2}}E\]
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B)
\[{{\left( \frac{1-A}{1+A} \right)}^{2}}E\]
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C)
\[\left( \frac{1+A}{1-A} \right)E\]
done
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D)
\[\left( \frac{1-A}{1+A} \right)E\]
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question_answer 8)
A uniform thin bar of mass 3 kg and length 0.9 m is bent to make an equilateral triangle. The moment of inertia of the triangle through its centre of mass and perpendicular to plane of triangle is :
A)
\[0.030\text{ }kg-{{m}^{2}}\]
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B)
\[0.015\text{ }kg-{{m}^{2}}\]
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C)
\[0.090\text{ }kg-{{m}^{2}}\]
done
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D)
\[0.045\text{ }kg-{{m}^{2}}\]
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question_answer 9) In case of a book lying on table :
A)
action of book and reaction of table on book are equal and opposite and are inclined to vertical
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B)
action and reaction are equal but act in the same direction
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C)
action and reaction are equal and opposite and act perpendicular to the surface of contact
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D)
action and reaction are not equal but act in opposite direction
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question_answer 10) A particle is subjected to acceleration\[a=\alpha t+\beta {{t}^{2}}\], where \[\alpha \] and\[\beta \] are constants. The position and velocity of the particle att = 0 are x0 and v0 respectively. The expression for position of particle at time c is :
A)
\[x(t)={{x}_{0}}+{{v}_{0}}t+\frac{1}{6}\alpha {{t}^{3}}+\frac{1}{12}\beta {{t}^{4}}\]
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B)
\[x(t)={{x}_{0}}+{{v}_{0}}t+\frac{1}{6}\alpha {{t}^{2}}+\frac{1}{24}\beta {{t}^{3}}\]
done
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C)
\[x(t)={{x}_{0}}+{{v}_{0}}t+\frac{1}{12}\alpha {{t}^{2}}+\frac{1}{6}\beta {{t}^{3}}\]
done
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D)
\[x(t)={{x}_{0}}+{{v}_{0}}t+\frac{1}{6}\alpha {{t}^{2}}+\frac{1}{12}\beta {{t}^{3}}\]
done
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question_answer 11) The period of revolution of an earth satellite close to the surface of the earth is 90 min. The time period of another earth satellite in an orbit at a distance of three earth radii from its surface will be :
A)
90 min
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B)
\[90\times \sqrt{8}\text{ }min\]
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C)
270 min
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D)
720 min
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question_answer 12) Energy per unit volume of stretched wire is :
A)
\[\frac{1}{2}\]\[\times \]stress\[\times \]strain
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B)
stress\[\times \]strain
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C)
\[\frac{1}{2}\] \[\times \]load \[\times \]strain
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D)
load \[\times \]strain
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question_answer 13) A number of small drops coalesce together to form a single drop. The temperature of new drop:
A)
increases
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B)
decreases
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C)
remains unchanged
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D)
may increase or decrease depends on size
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question_answer 14) Two hail stones with radii in the ratio of 1 : 2 fall from a great height through the atmosphere. Then the ratio of their momenta after they have attained terminal velocity is :
A)
1 :1
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B)
1 :4
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C)
1 : 16
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D)
1 : 32
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question_answer 15) The differential equation of a particle executing simple harmonic motion along y-axis is :
A)
\[\frac{{{d}^{2}}y}{d{{t}^{2}}}+{{\omega }^{2}}y=0\]
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B)
\[\frac{{{d}^{2}}y}{d{{t}^{2}}}+{{\omega }^{2}}{{y}^{2}}=0\]
done
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C)
\[\frac{{{d}^{2}}y}{d{{t}^{2}}}-{{\omega }^{2}}y=0\]
done
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D)
\[\frac{dy}{dt}+\omega y=0\]
done
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question_answer 16) A body executes simple harmonic motion with amplitude a. At what displacement from the equilibrium position is its energy half kinetic and half potential?
A)
\[\frac{a}{2}\]
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B)
\[\frac{a}{\sqrt{2}}\]
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C)
\[\sqrt{2a}\]
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D)
\[\frac{a}{3}\]
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question_answer 17) The equation of a particle executing simple harmonic motion is: \[y=10\sin \left( \frac{\pi }{2}t+\frac{\pi }{6} \right)cms.\] The time period of simple harmonic motion is:
A)
6 s
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B)
4 s
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C)
\[\frac{\pi }{3}s\]
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D)
\[\frac{\pi }{2}s\]
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question_answer 18) A sonometer wire, 100 cm in length has a fundamental frequency of 330 Hz. The velocity of propagation of transverse waves along the wire is:
A)
300 m/s
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B)
660 m/s
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C)
115 m/s
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D)
990 m/s
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question_answer 19) A water proofing agent changes the angle of contact:
A)
from acute to \[90{}^\circ \]
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B)
from obtuse to \[90{}^\circ \]
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C)
from an acute to an obtuse angle
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D)
from an obtuse to an acute angle
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question_answer 20) A tuning fork vibrating with a sonometer having 20 cm wire produces 5 beats/s. The beat frequency does not change when the length of the wire is changed to 21 cm. The frequency of tuning fork is :
A)
200
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B)
210
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C)
205
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D)
215
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question_answer 21) If n, is the resonance frequency of a pipe open at both ends and \[{{n}_{2}}\]the resonance frequency of pipe open at one end only. Both are vibrating in the fundamental mode and both pipes are of same length, then :
A)
\[{{n}_{1}}={{n}_{2}}\]
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B)
\[2{{n}_{1}}={{n}_{2}}\]
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C)
\[{{n}_{1}}=2{{n}_{2}}\]
done
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D)
\[3{{n}_{1}}=4{{n}_{2}}\]
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question_answer 22) The frequency of a radar is 780 MHz. The frequency of reflected wave from aeroplane is increased by 2.6 kHz. Velocity of the aeroplane is :
A)
0.25 km/s
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B)
0.5 km/s
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C)
1.0 km/s
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D)
2 km/s
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question_answer 23) If the density of hydrogen gas at NTP is \[0.0000893\text{ }g/c{{m}^{3}},\] then the root mean square velocity of molecules of hydrogen molecules at NTP is:
A)
1840 cm/s
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B)
184.0 cm/s
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C)
1840 m/s
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D)
184.0 m/s
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question_answer 24) The first law of thermodynamics is concerned with conservation of:
A)
number of molecules
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B)
number of moles
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C)
energy
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D)
temperature
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question_answer 25) An ideal gas undergoes an isothermal change in volume with pressure, then :
A)
\[PV=\] constant
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B)
\[{{(PV)}^{y}}=\] constant
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C)
\[P{{V}^{y}}=\] constant
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D)
\[{{P}^{Y}}V=\]constant
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question_answer 26) An ideal gas heat engine operates in a Carnots cycle between \[227{}^\circ C\] and \[127{}^\circ C\]. It absorbs \[6.0\times 104cal\] at higher temperature. The amount of heat converted into work is:
A)
\[4.8\times {{10}^{4}}cal\]
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B)
\[3.5\times {{10}^{4}}cal\]
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C)
\[1.6\times {{10}^{4}}cal\]
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D)
\[1.2\times {{10}^{4}}cal\]
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question_answer 27) A bucket full of hot water is kept in a room. It cools from \[75{}^\circ C\] to \[70{}^\circ C\] in f, minutes, from \[70{}^\circ C\] to \[65{}^\circ C\] in \[{{t}_{2}}\] minutes and from \[65{}^\circ C\] to \[60{}^\circ C\] int3 minutes. Then:
A)
\[{{t}_{1}}={{t}_{2}}={{t}_{3}}\]
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B)
\[{{t}_{1}}>{{t}_{2}}>{{t}_{3}}\]
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C)
\[{{t}_{1}}<{{t}_{2}}<{{t}_{3}}\]
done
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D)
\[{{t}_{1}}<{{t}_{2}}>{{t}_{3}}\]
done
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question_answer 28) The wavelength\[{{\lambda }_{m}}\]of maximum intensity of emission of solar radiation is \[{{\lambda }_{m}}\] = 4753 \[\overset{0}{\mathop{A}}\,\] and from moon is \[{{\lambda }_{m}}\]= 14 \[\mu m.\] The surface tempe-rature of sun and moon are : (given \[b=2.898\times {{10}^{-3}}m-K\])
A)
6097 K, 207 K
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B)
8097 K, 307 K
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C)
10,000 K. 400 K
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D)
3000 K, 100 K
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question_answer 29) A sphere of 4 cm radius is suspended within hollow sphere of 6 cm radius. The inner sphere is charged to a potential 3 esu, when the outer sphere is earthed. The charge on the inner sphere is :
A)
54 esu
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B)
27 esu
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C)
30 esu
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D)
36 esu
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question_answer 30)
Five capacitors each of 10\[\mu F\]capacity are connected to a potential of 100 V as shown in figure. The equivalent capacitance beween ihe points A and B is:
A)
5\[\mu F\]
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B)
10\[\mu F\]
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C)
15\[\mu F\]
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D)
20 \[\mu F\]
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question_answer 31) When a potential difference is applied across a conductor, the free electrons in the conductor are set in motion. Two velocities are associated with moving electrons-the drift velocity and average velocity, fact is that the two are :
A)
same
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B)
same in some conductors and different in other conductors
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C)
entirely different
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D)
none of the above
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question_answer 32) A given piece of wire of length 4 cross-sectional area A has a resistance R. The wire is stretched uniformly to a new length 21 What is the resistance of the wire now?
A)
2R
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B)
4R
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C)
8R
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D)
R
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question_answer 33)
Three equal resistors each equal to r are connected as shown in the given figure. The equivalent resistance between points A and B is:
A)
r
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B)
3r
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C)
\[\frac{r}{3}\]
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D)
\[\frac{2}{3}r\]
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question_answer 34) Two bulbs of wattage 40 W and 100 W each rated at 200 V are connected in series across a 440 V. What will happen?
A)
40 W bulb will fuse
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B)
100 W bulb will fuse
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C)
Both bulbs will fuse
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D)
Nothing will happen
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question_answer 35) An electric bulb rated 100 W at 220 V is operating at 110 V. What is the power consumed?
A)
50 W
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B)
75 W
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C)
100 W
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D)
25 W
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question_answer 36)
A straight thin conductor is bent as shown in the adjoining figure. It carries a current i ampere. The radius of the semicircular arc is r metre. The magnetic induction at the centre of semicircular arc is:
A)
\[\frac{{{\mu }_{0}}}{4\pi }\frac{i}{r}tesla\]
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B)
\[\frac{{{\mu }_{0}}}{4\pi }\frac{i}{r}tesla\]
done
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C)
\[\frac{{{\mu }_{0}}}{4\pi }\frac{i}{2r}tesla\]
done
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D)
zero
done
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question_answer 37)
An infinitely long conductor is bent into a circle as shown in figure. It carries a current / ampere and the radius of loop is R metre. The magnetic induction at the centre of loop is :
A)
\[\frac{{{\mu }_{0}}}{4\pi }\frac{2I}{R}(\pi +1)tesla\]
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B)
\[\frac{{{\mu }_{0}}}{4\pi }\frac{2I}{R}(\pi -1)tesla\]
done
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C)
\[\frac{{{\mu }_{0}}}{4\pi }\frac{I}{2R}(\pi +1)tesla\]
done
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D)
zero
done
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question_answer 38) A circular current carrying coil has a radius R. The distance from the centre of the coil on the axis of the coil, where the magnetic induction is\[\frac{1}{8}\] of its value at the centre of coil is :
A)
\[\sqrt{3}R\]
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B)
\[\frac{R}{\sqrt{3}}\]
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C)
\[\left( \frac{2}{\sqrt{3}} \right)R\]
done
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D)
\[\frac{R}{2\sqrt{3}}\]
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question_answer 39) A charge is fired through a magnetic field. The force acting on it is maximum when the direction of motion of the charge and magnetic field is :
A)
zero
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B)
\[\frac{\pi }{4}\]
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C)
\[\frac{\pi }{2}\]
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D)
\[\pi \]
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question_answer 40) Inversion temperature for a thermocouple is the temperature at which thermo emf:
A)
increases
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B)
remains unchanged
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C)
changes erratically
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D)
reverses in sign
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question_answer 41) Lenzs law is a consequence of the law of conservation of:
A)
energy
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B)
charge
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C)
mass
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D)
momentum
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question_answer 42) A current carrying coil is placed in a unifonr. magnetic field of induction B. If the current in the coil is i, it has N turns and A is the force area of the coil and normal to the surface makes an angle \[\theta \] with B, then the torque experienced by the coil is :
A)
\[BNiA\theta \]
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B)
\[BNAi\cos \theta \]
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C)
\[BNAi\sin \theta \]
done
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D)
\[BNAi\tan \theta \]
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question_answer 43) The current in a self-inductance L = 40 mH increased uniformly from 0 ampere to 10 A in \[4\times {{10}^{-3}}s.\]The induced emf produced in during this process will be :
A)
40 V
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B)
400 V
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C)
0.4 V
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D)
100 V
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question_answer 44) The number of turns in the primary and the secondary turns of a transformer are 1000 and 3000 respectively. If 80 V AC is applied to the primary coil of the transformer, then the potential difference per turn of secondary coil is:
A)
0.24 V
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B)
0.08 V
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C)
240 V
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D)
2400 V
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question_answer 45) A current \[I={{I}_{0}}\sin \left( \omega t-\frac{\pi }{2} \right)\] flows in an AC potential of \[E={{E}_{0}}sin\] to t has been applied, then the power consumption in the circuit will be:
A)
\[\frac{{{E}_{0}}{{I}_{0}}}{\sqrt{2}}\]
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B)
\[\frac{EI}{\sqrt{2}}\]
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C)
\[\frac{{{E}_{0}}{{I}_{0}}}{2}\]
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D)
zero
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question_answer 46) An LCR series circuit is connected to a source of alternating current. At resonance the applied voltage and current flowing through the circuit will have a phase difference of :
A)
zero
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B)
\[\frac{\pi }{4}\]
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C)
\[\frac{\pi }{2}\]
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D)
\[\pi \]
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question_answer 47) An electric bulb in series with a large inductor when connected across a DC source takes a little time before reaching a stable glow. If an iron core is inserted into the inductor the time delay of reaching stable glow will:
A)
decrease
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B)
increase
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C)
remains the same
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D)
may increase or decrease
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question_answer 48) In Millikans oil drop experiment, an oil drop of radius r and charge q is held in equilibrium between plates of a parallel plate capacitor when the potential difference is V. To keep a drop of radius 2 r with charge 2q in equilibrium between the plates, the potential difference required is :
A)
V
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B)
2 V
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C)
4 V
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D)
8 V
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question_answer 49) One milli watt of light of wavelength 4560 \[\overset{0}{\mathop{A}}\,\] is incident on a cesium surface of work function 1.9 eV. Given that quantum of efficiency of photoelectric emission is 0.5%, Planck constant \[h=6.62\times {{10}^{-34}}J-s,\] velocity of light \[c=3\times {{10}^{8}}m/s,\]the photoelectric current liberated is :
A)
\[1.84\times {{10}^{-6}}A\]
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B)
\[1.84\times {{10}^{-7}}A\]
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C)
\[1.84\times {{10}^{-5}}A\]
done
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D)
\[1.84\times {{10}^{-4}}A\]
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question_answer 50) Light of frequency 1.5 times the threshold frequency is incident on a photosensitive material photoelectric current is emitted. If the frequency of light is halved and intensity is doubled, the photoelectric current becomes:
A)
4 times the original current
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B)
2 times the original current
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C)
half the original current
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D)
zero times the original current
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question_answer 51) Light of wavelength 3500\[\overset{0}{\mathop{A}}\,\] is incident on two metals A and B, A of work function 4.2 eV and B of work function 1.19 eV respectively. The photoelectrons will be emitted by :
A)
metal A
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B)
metal B
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C)
both A and B
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D)
neither metal A nor metal B
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question_answer 52) Of the various series of hydrogen spectrum, the one which lies wholly in the ultra violet is:
A)
Brackett series
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B)
Paschen series
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C)
Lyman series
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D)
Balmer series
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question_answer 53) The first excitation potential of hydrogen atom in the ground state is :
A)
13.6 V
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B)
3.4 V
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C)
10.2 V
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D)
1.89 V
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question_answer 54) According to Bohrs theory of hydrogen atom, the angular momentum of an electron in any orbit of hydrogen atom is:
A)
directly proportional to radius of orbit
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B)
inversely proportional to the radius of orbit
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C)
directly proportional to the square of the orbit radius
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D)
directly proportional to the square root of the radius of the orbit
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question_answer 55) If the wavelength of first member of Balmer series in hydrogen spectrum is 6563\[\overset{0}{\mathop{A}}\,\], the wavelength of second member of Balmer series will be :
A)
1215\[\overset{0}{\mathop{A}}\,\]
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B)
4861\[\overset{0}{\mathop{A}}\,\]
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C)
6050\[\overset{0}{\mathop{A}}\,\]
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D)
data given is insufficient to calculate the value
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question_answer 56) In the nuclear fission reaction, \[_{2}^{4}He+_{7}^{14}N\to _{p}^{q}x{{+}_{1}}{{H}^{1}}\] the nucleus \[_{p}^{q}X\]is :
A)
nitrogen of mass 16
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B)
nitrogen of mass 17
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C)
oxygen of mass 16
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D)
oxygen of mass 17
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question_answer 57) In atomic reactors cadmium rods are used to control the chain reaction. This is because cadmium:
A)
absorbs some neutrons
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B)
slows down the neutrons
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C)
speeds up neutrons
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D)
emits neutrons
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question_answer 58) Nuclear forces are :
A)
attractive only
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B)
repulsive only
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C)
attractive or repulsive depending upon separation between the nucleons
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D)
neither attractive nor repulsive
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question_answer 59) The binding energy per nucleon for deuteron \[[_{1}^{2}H]\]and helium \[[_{2}^{4}He]\]are 1.1 MeV and 7 MeV. The energy released when two deuterons fuse to form a helium nucleus is :
A)
32.4 MeV
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B)
23.6 MeV
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C)
16.2 MeV
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D)
11.8 MeV
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question_answer 60) The activity of 1 mg sample of \[_{38}^{90}sr\] whose half-life is 28 yr is : (Given that Avogadros number is \[6.02\times {{10}^{23}}\])
A)
\[5.24\times {{10}^{9}}\] disintegrations/s
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B)
\[5.24\times {{10}^{10}}\] disintegrations/s
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C)
\[5.24\times {{10}^{8}}\] disintegrations/s
done
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D)
\[5.24\times {{10}^{11}}\] disintegrations/s
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question_answer 61) Atomic radius of fee is :
A)
\[\frac{a}{2}\]
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B)
\[\frac{a}{2\sqrt{2}}\]
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C)
\[\frac{\sqrt{3}}{4}a\]
done
clear
D)
\[\frac{\sqrt{3}}{2}a\]
done
clear
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question_answer 62) n-type semiconductor is formed :
A)
when a germanium crystal is doped with a impurity containing 3 valence electrons
done
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B)
from pure germanium
done
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C)
from pure silicon
done
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D)
when a germanium crystal are doped with an impurity containing 5-valence of electrons
done
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question_answer 63) A solid that transmits light in visible region and has a very low melting point possesses :
A)
metallic bonding
done
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B)
ionic bonding
done
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C)
covalent bonding
done
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D)
van der Waals bonding
done
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question_answer 64) To use a transistor as an amplifier :
A)
both junctions are forward biased
done
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B)
both junctions are reverse biased
done
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C)
the emitter-base junction is forward biased and the collector-base junction is reverse biased
done
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D)
no biasing voltages are required
done
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question_answer 65) Huygens principle cannot explain :
A)
origin of spectra
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B)
refraction
done
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C)
reflection
done
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D)
diffraction
done
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question_answer 66) Which of the following phenomenon is not shown by sound waves?
A)
Diffraction
done
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B)
Interference
done
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C)
Polarisation
done
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D)
None of these
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question_answer 67) A thin equilateral triangle has a refractive index of \[\sqrt{3}\]. Find the angle of minimum deviation :
A)
\[30{}^\circ \]
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B)
\[60{}^\circ \]
done
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C)
\[45{}^\circ \]
done
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D)
\[90{}^\circ \]
done
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question_answer 68) Which of the following does not change when a wave travels from one medium to another medium?
A)
Wavelength
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B)
Frequency
done
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C)
Velocity
done
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D)
Amplitude
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question_answer 69) The critical angle of a prism is 30°. The velocity of light in the medium is :
A)
\[1.5\times {{10}^{8}}m/s\]
done
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B)
\[3\times {{10}^{8}}m/s\]
done
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C)
\[4.5\times {{10}^{8}}m/s\]
done
clear
D)
none of these
done
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question_answer 70) In order to see diffraction the thickness of the film is:
A)
100 \[\overset{0}{\mathop{A}}\,\]
done
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B)
10,000 \[\overset{0}{\mathop{A}}\,\]
done
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C)
1 mm
done
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D)
1 cm
done
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question_answer 71) An equation \[x={{t}^{3}}-2f\] denotes relationship between displacement and time. At t = 4 s, acceleration is given by:
A)
12 unit
done
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B)
22 unit
done
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C)
24 unit
done
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D)
26 unit
done
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question_answer 72) Light is an electromagnetic wave. Its speed in vacuum is given by the expression :
A)
\[\sqrt{{{\mu }_{0}}{{\varepsilon }_{0}}}\]
done
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B)
\[\sqrt{\frac{{{\mu }_{0}}}{{{\varepsilon }_{0}}}}\]
done
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C)
\[\sqrt{\frac{{{\varepsilon }_{0}}}{{{\mu }_{0}}}}\]
done
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D)
\[\frac{1}{\sqrt{{{\mu }_{0}}{{\varepsilon }_{0}}}}\]
done
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question_answer 73) In Youngs experiment, the ratio of maximum and minimum intensities in the fringe system is 9:1. The ratio of amplitudes of coherent sources is :
A)
9 : 1
done
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B)
3:1
done
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C)
2 : 1
done
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D)
1 : 1
done
clear
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question_answer 74) A nucleus represented by the symbol ZXA has:
A)
Z neutrons and (A - Z) protons
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B)
Z protons and (A - Z) neutrons
done
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C)
Z protons and A neutrons
done
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D)
A protons and (Z - A) neutrons
done
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View Answer play_arrow
question_answer 75) A radioactive substance decays to \[\frac{1}{16}\] th of its initial activity in 40 days. The half-life of the radioactive substance expressed in days is:
A)
2.5
done
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B)
5
done
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C)
10
done
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D)
20
done
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question_answer 76) How many atoms of sulphur are present in 0.2 mole of sulphur\[({{S}_{8}})\]molecule?
A)
\[9.64\times {{10}^{23}}\]
done
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B)
\[96.4\times {{10}^{23}}\]
done
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C)
\[1.205\times {{10}^{23}}\]
done
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D)
\[12.05\times {{10}^{23}}\]
done
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question_answer 77) The change\[_{14}^{30}Si\xrightarrow[{}]{{}}_{15}^{30}P\]requires the emission of:
A)
\[\alpha -\]particle
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B)
\[\beta -\]particle
done
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C)
neutron
done
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D)
positron
done
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View Answer play_arrow
question_answer 78) \[_{19}^{39}K\]and\[_{20}^{40}Ca\]are:
A)
isomers
done
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B)
isobars
done
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C)
isotones
done
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D)
isotopes
done
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question_answer 79) The pH of\[0.1\text{ }N\text{ }NaOH\]solution will be:
A)
0
done
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B)
1
done
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C)
7
done
clear
D)
13
done
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question_answer 80) Which of the following can behave as amphoteric oxide?
A)
\[A{{l}_{2}}{{O}_{3}}\]
done
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B)
\[N{{a}_{2}}O\]
done
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C)
\[S{{O}_{2}}\]
done
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D)
\[A{{l}_{2}}{{O}_{3}}\]
done
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question_answer 81) Which of the following value of\[{{n}_{1}}\] in the relationship\[\frac{1}{\lambda }=R\left( \frac{1}{n_{1}^{2}}-\frac{1}{n_{2}^{2}} \right)\] is correct when\[{{n}_{2}}>{{n}_{1}}\]corresponds to Paschen lines in the hydrogen spectrum?
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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question_answer 82) The correct set of quantum numbers for unpaired electron of fluorine is:
A)
\[n=3,l=1,\,m=0\]
done
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B)
\[n=2,l=1,\text{ }m=0\]
done
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C)
\[n=2,l=0,m=0\]
done
clear
D)
\[n=2,l=1,\text{ }m=1\]
done
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question_answer 83) Calculate the amount of\[[Ca{{(OH)}_{2}}]\]required to remove the hardness of water from 60,000 L containing 16.2 g of\[Ca{{(HC{{O}_{3}})}_{2}}\]per 100 L:
A)
1.11 kg
done
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B)
2.22kg
done
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C)
3.33 kg
done
clear
D)
4.44 kg
done
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question_answer 84) Precipitation takes place when then product of concentration of ions is:
A)
more than solubility product
done
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B)
negligible
done
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C)
less than the solubility product
done
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D)
equals the solubility product
done
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View Answer play_arrow
question_answer 85) Which of the following is an emulsion?
A)
Milk
done
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B)
White of an egg
done
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C)
Cheese
done
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D)
Soap solution
done
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question_answer 86) The presence of colloidal particles can be confirmed with the help of:
A)
naked eye
done
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B)
ordinary microscope
done
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C)
ultra-microscope
done
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D)
none of the above
done
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question_answer 87) Which of the following is an example of homogeneous catalysis?
A)
\[2S{{O}_{2}}+{{O}_{2}}\xrightarrow{NO}2S{{O}_{3}}\]
done
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B)
\[2CO(g)+2{{H}_{2}}(g)\xrightarrow{ZnO}C{{H}_{3}}OH\]
done
clear
C)
\[2S{{O}_{2}}+{{O}_{2}}\xrightarrow{{{V}_{2}}{{O}_{5}}}2S{{O}_{3}}\]
done
clear
D)
\[2CO(g)+{{O}_{2}}(g)\xrightarrow{{{V}_{2}}{{O}_{5}}}2C{{O}_{2}}(g)\]
done
clear
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question_answer 88) An aqueous solution contains 25% ethanol and 50% acetic acid by mass. Calculate the mole fraction of acetic acid in this solution:
A)
0.196
done
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B)
0.301
done
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C)
0.392
done
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D)
0.503
done
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question_answer 89) If a given sample of water contains 0.06 g of\[C{{a}^{2+}}\]ion per kg, calculate the ppm level of\[C{{a}^{2+}}\]ions:
A)
0.6
done
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B)
60
done
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C)
6
done
clear
D)
600
done
clear
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question_answer 90) Which of the following solution shows positive deviation?
A)
Water + nitric acid
done
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B)
Acetone + aniline
done
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C)
Acetone + benzene
done
clear
D)
Acetone + chloroform
done
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question_answer 91) Calculate the osmotic pressure of a solution containing 0.153 g glucose in 0.1 L of the solution at 298 K?
A)
0.027 atm
done
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B)
0.107 atm
done
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C)
0.172 atm
done
clear
D)
0.207 atm
done
clear
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question_answer 92) If the enthalpy change for the reaction is\[2N{{H}_{3}}(g)\xrightarrow{{}}{{N}_{2}}(g)+3{{H}_{2}}(g)\]is\[92\,kJ\,mo{{l}^{-1}}\] the enthalpy of formation of ammonia is:
A)
\[-23.0\text{ }kJ\text{ }mo{{l}^{-1}}\]
done
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B)
\[-46\text{ }kJ\text{ }mo{{l}^{-1}}\]
done
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C)
\[-92.0\text{ }kJ\text{ }mo{{l}^{-1}}\]
done
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D)
\[46\text{ }kJ\text{ }mo{{l}^{-1}}\]
done
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question_answer 93) The heat of solution depends upon:
A)
nature of solute
done
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B)
nature of solvent
done
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C)
concentration of the solution
done
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D)
all of the above
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question_answer 94) The enthalpy of neutralization of\[NaOH\]with acetic acid is 55 kJ and with\[HCl\]is\[57.1\text{ }kJ\]. This happens because:
A)
some heat is required for complete ionisation of acetic acid
done
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B)
acetic acid is an organic acid
done
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C)
acetic acid is less soluble in water
done
clear
D)
acetic acid is a weak acid and required lesser alkali
done
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View Answer play_arrow
question_answer 95) \[In\text{ }the\text{ }reaction\text{ }milk\to cheese,\text{ }\Delta \text{S}\]is:
A)
0
done
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B)
negative
done
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C)
positive
done
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D)
none of these
done
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question_answer 96) How many Faradays of electricity are required. to be passed through an aqueous solution of\[AlC{{l}_{3}}\]for deposition of 13.5 g of aluminium metal?
A)
0.5
done
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B)
1.0
done
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C)
1.5
done
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D)
2
done
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question_answer 97) Which substance is acting as a reducing agent in the reaction? \[2MnO_{4}^{-}+16{{H}^{+}}+10F{{e}^{2+}}\xrightarrow{{}}2M{{n}^{2+}}\]\[+10F{{e}^{3+}}+8{{H}_{2}}O\]
A)
\[{{H}_{2}}O\]
done
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B)
\[{{H}^{+}}\]
done
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C)
\[F{{e}^{2+}}\]
done
clear
D)
\[MnO_{2}^{-}\]
done
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question_answer 98) The space in the dry cell is filled with:
A)
paste of\[KOH\]and\[ZnO\]
done
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B)
\[Mn{{O}_{2}},ZnC{{l}_{2}},\]a filter
done
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C)
\[Mn{{O}_{2}},ZnC{{l}_{2}},N{{H}_{4}}Cl\] and a filter
done
clear
D)
\[MnC{{l}_{2}},ZnC{{l}_{2}},N{{H}_{4}}Cl\]and a filter
done
clear
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question_answer 99) Measurement of the dry gas from the volume of moist gas is based on:
A)
Boyles law
done
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B)
Avogadros law
done
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C)
Gay Lussacs law
done
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D)
Daltons law of partial pressure
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question_answer 100) According to kinetic theory of gases
A)
the absolute temperature is a measure of kinetic energy of molecules
done
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B)
molecules attract each other
done
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C)
energy is lost during molecular collision
done
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D)
molecules possess appreciable volume
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View Answer play_arrow
question_answer 101) To which of the crystal systems does\[Ti{{O}_{2}}\] (titanium oxide) belongs?
A)
Tetragonal
done
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B)
Cubic
done
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C)
Hexagonal
done
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D)
Monoclinic
done
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question_answer 102) Which of the following non-metal possesses the atomicity double than that of phosphorus?
A)
Oxygen
done
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B)
Sulphur
done
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C)
Nitrogen
done
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D)
Arsenic
done
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question_answer 103) Which of the following has least ionic radius?
A)
\[{{I}^{+}}\]
done
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B)
\[{{I}^{3+}}\]
done
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C)
\[{{I}^{5+}}\]
done
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D)
\[{{I}^{7+}}\]
done
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question_answer 104) Which of the following has highest ionization energy?
A)
As
done
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B)
F
done
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C)
Ne
done
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D)
He
done
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question_answer 105) Which of the following has highest electron affinity?
A)
Argon
done
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B)
Chlorine
done
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C)
Fluorine
done
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D)
Oxygen
done
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question_answer 106) Which of the following has the same number of unpaired electrons as are present in samarium?
A)
Scandium
done
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B)
Chromium
done
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C)
Manganese
done
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D)
Iron
done
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question_answer 107) In which of the following compounds manganese has oxidation number equal to that of sulphur in manganese (II) sulphate?
A)
potassium permanganate
done
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B)
manganous chloride
done
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C)
potassium manganite
done
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D)
manganese dioxide
done
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question_answer 108) Which of the following has no unpaired electrons but is coloured?
A)
\[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]
done
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B)
\[{{K}_{2}}Mn{{O}_{4}}\]
done
clear
C)
\[CuS{{O}_{4}}.5{{H}_{2}}O\]
done
clear
D)
\[MnC{{l}_{2}}\]
done
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question_answer 109) Which of the following is expected not to yield a white precipitate with silver nitrate?
A)
\[[Co{{(N{{H}_{3}})}_{3}}C{{l}_{3}}]\]
done
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B)
\[[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]Cl\]
done
clear
C)
\[[Co{{(N{{H}_{3}})}_{5}}Cl]C{{l}_{2}}\]
done
clear
D)
\[[Co{{(N{{H}_{3}})}_{6}}]C{{l}_{3}}\]
done
clear
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question_answer 110) Which of the following ligand can yield linkage isomers?
A)
\[CO_{3}^{2-}\]
done
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B)
\[N{{O}_{3}}\]
done
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C)
\[NO_{2}^{-}\]
done
clear
D)
\[CIO_{4}^{-}\]
done
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question_answer 111) Which of the -following complexes is tetrahedral and do not have any unpaired electrons?
A)
\[Ni{{[{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
done
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B)
\[{{K}_{2}}[NiC{{l}_{4}}]\]
done
clear
C)
\[{{K}_{2}}[Ni{{(CN)}_{4}}]\]
done
clear
D)
\[[Ni{{(CO)}_{4}}]\]
done
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View Answer play_arrow
question_answer 112) Doubling the concentration of A in the reaction\[A\to B\]increases the rate of formation of B by a factor of 4. The order of reaction kinetics is:
A)
0
done
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B)
1
done
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C)
2
done
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D)
3
done
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question_answer 113) Rate constants of some of the reactions are given below. Which one belongs to third order reaction?
A)
\[8.7\times {{10}^{-3}}L\text{ }mo{{l}^{-1}}{{s}^{-1}}\]
done
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B)
6.5 mol
done
clear
C)
\[5.3\times {{10}^{-5}}{{s}^{-1}}\]
done
clear
D)
\[2.5\times {{10}^{-2}}{{L}^{2}}mo{{l}^{-2}}{{s}^{-1}}\]
done
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question_answer 114) The half-life period of a reaction is independent of initial pressure. Predict the order of the reaction.
A)
0
done
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B)
1
done
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C)
2
done
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D)
3
done
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question_answer 115) Which of the following has a linear shape?
A)
\[{{H}_{2}}O\]
done
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B)
\[C{{O}_{2}}\]
done
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C)
\[S{{O}_{2}}\]
done
clear
D)
\[B{{F}_{3}}\]
done
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question_answer 116) Which of the following is the weakest bond?
A)
Hydrogen bond
done
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B)
Metallic bond
done
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C)
Ionic bond
done
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D)
Covalent bond
done
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question_answer 117) Which of the following is a\[f-\]block element?
A)
Ce
done
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B)
Cs
done
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C)
Cu
done
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D)
Cr
done
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question_answer 118) The total number of monobromo derivatives of isohexane are:
A)
6
done
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B)
5
done
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C)
4
done
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D)
7
done
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question_answer 119) The specific rotation of (R) (-)\[2-\]bromooctane is\[-\,40\]. What is the percentage composition of mixture of enantiomers of\[2-\]bromooctane whose rotation is\[+20\]?
A)
The mixture has 25% R and 75% S
done
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B)
(b )The mixture has 20% R and 80% S
done
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C)
The mixture has 50% R and 50% S
done
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D)
The mixture has 75% R and 25% S
done
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question_answer 120) Cracking process is specifically directed towards one of the following:
A)
refining of petroleum
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B)
production of gas oil
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C)
production of complex chemicals
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D)
production of fuel
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question_answer 121) If ozonolysis of an organic compound A yields acetone and propionaldehyde, then A is:
A)
iso-butylene
done
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B)
3-methyl-2-pentene
done
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C)
2-methyl-2-pentene
done
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D)
2-methyl-1-peniene
done
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question_answer 122) For the industrial manufacture of high density polyethylene, identify the process that is generally adopted out of following:
A)
free-radical liquid phase of polymerization
done
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B)
free-radical gas phase polymerization
done
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C)
Zeigler-Natta or oxide catalyzed polymerization
done
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D)
anionic polymerization
done
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question_answer 123) In the manufacture of nylon-66, balance of functional group is ensured by adopting one of the following:
A)
preparing and purifying the nylon salt in a separate stage
done
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B)
by using excess of adipic acid or hexamethylene diamine
done
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C)
by using excess of pressure in the process
done
clear
D)
by the choice of appropriate catalysts
done
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question_answer 124) Which of the following is as per the definition of electron-affinity?
A)
\[{{X}_{2}}(g)\xrightarrow{+2{{e}^{-}}}2{{X}^{-}}(g)\]
done
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B)
\[X(g)\xrightarrow{+{{e}^{-}}}{{X}^{-}}(g)\]
done
clear
C)
\[{{X}^{+}}(g)\xrightarrow{+{{e}^{-}}}X(g)\]
done
clear
D)
\[{{X}^{-}}(g)\xrightarrow{+{{e}^{-}}}{{X}^{2-}}(g)\]
done
clear
View Answer play_arrow
question_answer 125) Which of the following is a soda ash?
A)
\[N{{a}_{2}}C{{O}_{3}}-10{{H}_{2}}O\]
done
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B)
\[N{{a}_{2}}C{{O}_{3}}-7{{H}_{2}}O\]
done
clear
C)
\[N{{a}_{2}}C{{O}_{3}}-6{{H}_{2}}O\]
done
clear
D)
\[N{{a}_{2}}C{{O}_{3}}\]
done
clear
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question_answer 126) Coke is used in metallurgical process as:
A)
slag
done
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B)
flux
done
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C)
reducing agent
done
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D)
oxidising agent
done
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question_answer 127) Which of the following is iron-pyrites?
A)
\[F{{e}_{2}}{{O}_{3}}-3{{H}_{2}}O\]
done
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B)
\[FeS\]
done
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C)
\[Fe{{S}_{2}}\]
done
clear
D)
\[F{{e}_{2}}{{S}_{3}}\]
done
clear
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question_answer 128) Which of the following is malachite?
A)
\[CuC{{O}_{3}}.Cu{{(OH)}_{2}}\]
done
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B)
\[2CuC{{O}_{3}}.Cu{{(OH)}_{2}}\]
done
clear
C)
\[C{{u}_{2}}O\]
done
clear
D)
\[C{{u}_{2}}S\]
done
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View Answer play_arrow
question_answer 129) How many structural isomers can be written for an organic compound with molecular formula\[{{C}_{5}}{{H}_{11}}Br\]?
A)
5
done
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B)
7
done
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C)
4
done
clear
D)
6
done
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question_answer 130) \[RCl\]is treated with Li in ether solution to form\[RLi.\text{ }RLi\]reacts with water to form is opentane.\[RCl\] also reacts with Na to form 2, 7-dimethyl-octane. What is the structure of\[RCl\]?
A)
Octyl-chloride
done
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B)
2-chloro-2-methyl-butane
done
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C)
Dimethyl-chloro-octane
done
clear
D)
Isopentyl-chloride
done
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View Answer play_arrow
question_answer 131) What is the oxidation number of C in\[C{{H}_{3}}Cl\]?
A)
\[-\,3\]
done
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B)
0
done
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C)
\[-\,2\]
done
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D)
\[-\,4\]
done
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question_answer 132) The product of glycine with aqueous\[HCl\]is:
A)
\[{{H}_{2}}N-CHCl-COOH\]
done
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B)
\[\overline{C}l{{H}_{3}}\overset{\oplus }{\mathop{N}}\,-C{{H}_{2}}-COOH\]
done
clear
C)
\[{{H}_{2}}N-C{{H}_{2}}-COCl\]
done
clear
D)
\[{{H}_{2}}N-CHCl-CO\overline{O}\overset{\oplus }{\mathop{C}}\,l\]
done
clear
View Answer play_arrow
question_answer 133) When RNA is hydro lysed the quantities of the four bases obtained are generally unequal, unlike DNA. What does this fact suggest about the structure of RNA?
A)
A double strand helix
done
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B)
A single strand helix
done
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C)
An equal mixture of double and single strand helix
done
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D)
Unequal mixture of double and single strand
done
clear
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question_answer 134) The prosthetic group of protein rhodopsin is :
A)
\[\beta -\]carotene
done
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B)
vitamin-A
done
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C)
11-cis-retinol
done
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D)
retinol
done
clear
View Answer play_arrow
question_answer 135) The diazodzation of two feebly basic aromatic amines is achieved by using:
A)
nitrous acid
done
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B)
nitrosyl-hydrochloric acid
done
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C)
sulphuric acid
done
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D)
nitrosoyl-sulphuric acid
done
clear
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question_answer 136) What kind of amines can be tested by reaction with chloroform under basic conditions?
A)
Primary aliphatic amines
done
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B)
Primary aromatic amines
done
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C)
Both primary aliphatic and aromatic amines
done
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D)
All kind of available amines
done
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View Answer play_arrow
question_answer 137) Which reagent can be used for the alkylation of aromatic nitro compounds?
A)
Methyl-sulfinyl carbanion
done
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B)
Methyl-iodide
done
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C)
Dimethyl-sulphate
done
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D)
Methyl-lithium
done
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View Answer play_arrow
question_answer 138) What is the product of reduction of a carboxylic ester using a reagent prepared from\[B{{F}_{3}}-\]etherate and\[LiAl{{H}_{4}}\]?
A)
A carboxyiic acid
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B)
An alcohol
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C)
A cyclic ester
done
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D)
An ether
done
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question_answer 139) The formylation of certain aromatic compounds using carbon monoxide and\[HCl\] in presence of cuprous chloride is known as Gattermann-Koch reaction and the product of this reaction is represented as:
A)
\[ArCOCl\]
done
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B)
\[ArH\]
done
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C)
\[ArCHO\]
done
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D)
\[ArCuCl\]
done
clear
View Answer play_arrow
question_answer 140) Gem-dihalides are hydrolysed with either acid or basic catalysts to give:
A)
aldehydes or ketones
done
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B)
halohydrins
done
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C)
carboxylic acids
done
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D)
gem-diols
done
clear
View Answer play_arrow
question_answer 141) What is A in the following reaction? \[{{H}_{3}}C-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-R\xrightarrow[O{{H}^{-}}]{B{{r}_{2}}}CHB{{r}_{3}}+A\]
A)
\[R-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-R\]
done
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B)
\[R-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-{{O}^{-}}\]
done
clear
C)
\[R-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-Br\]
done
clear
D)
\[R-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-OR\]
done
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View Answer play_arrow
question_answer 142) The difference in activity: \[M{{e}_{2}}CC{{H}_{2}}COOH>M{{e}_{3}}SiC{{H}_{2}}COOH\]can be attributed to the fact diat:
A)
silicon is more electropositive than carbon and therefore has an electron donating inductive effect
done
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B)
silicon is a non-metal
done
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C)
carbon is more electropositive than silicon and has an electron donating inductive effect
done
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D)
carbon is a non-metal
done
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question_answer 143) 3-pentanol upon reaction with\[PB{{r}_{3}}\] gives 2 and 3-bromopentane. Such rearrangement can be avoided by:
A)
using excess of\[PB{{r}_{3}}\]
done
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B)
choosing low temperature for reaction
done
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C)
converting alcohol into sulphuric or sulphonic acid
done
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D)
converting alcohol into carboxylate esters
done
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View Answer play_arrow
question_answer 144) The considerably greater acid strength of \[PhOH(p{{K}_{a}}=10)\]than that of \[ROH(p{{K}_{a}}=18)\]is due to the fact that:
A)
\[PhO\](phenoxide ion) is a stronger base than\[R{{O}^{-}}\](alkoxide ion)
done
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B)
\[PhO\](phenoxide ion) is a weaker base than \[R{{O}^{-}}\](alkoxide ion)
done
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C)
\[ROH\]is soluble in water
done
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D)
\[PhOH\]is aromatic in nature
done
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View Answer play_arrow
question_answer 145) The correct order of relative acidic strength of the following compounds is:
A)
phenol > o-nitrophenol > m-nitrophenol > p-nitrophenol
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B)
p-nitrophenol > m-nitrophenol > o-nitrophenol > phenol
done
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C)
p-nitrophenol > o-nitrophenol > m-nitrophenol > phenol
done
clear
D)
o-nitrophenol > m-nitrophenol > p-nitrophenol > phenol
done
clear
View Answer play_arrow
question_answer 146) A radioactive isotope has a half-life of 10 days. What was its original weight 40 days earlier if today it is 125 g?
A)
600 g
done
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B)
1000 g
done
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C)
1250 g
done
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D)
2000 g
done
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View Answer play_arrow
question_answer 147) For the reversible system: \[X(g)Y(g)+Z(g),\]a quantity of X was heated at constant pressure P at a certain temperature. The equilibrium partial pressure of X was found to be\[\frac{P}{7}\]. What is the value of \[{{K}_{p}}\]at given temperature?
A)
\[\frac{6P}{7}\]
done
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B)
\[\frac{9P}{7}\]
done
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C)
\[\frac{36P}{7}\]
done
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D)
\[6P\]
done
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View Answer play_arrow
question_answer 148) The equilibrium constant for a reversible chemical reaction varies with T as: \[\begin{matrix} {{K}_{p}}(at{{m}^{-2}}) & {{10}^{-2}} & {{10}^{-3}} \\ T(K) & 400 & 450 \\ \end{matrix}\] From this, it may be deduced that:
A)
the value of\[{{K}_{p}}\]increases with increase in temperature
done
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B)
the forward reaction gives out heat
done
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C)
there are more moelcules on the right hand side of the chemical equation than on the left
done
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D)
the reaction proceeds ten times faster at 450 K than 400 K
done
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View Answer play_arrow
question_answer 149) Slaked lime,\[Ca{{(OH)}_{2}}\]is used extensively in sewage treatment. What is the maximum pH that can be established in\[Ca{{(OH)}_{2}}(aq)\]? \[Ca{{(OH)}_{2}}(g)C{{a}^{2+}}(aq.)+2O{{H}^{-}}(aq);\]\[{{K}_{sp}}=5.5\times {{10}^{-6}}\]
A)
1.66
done
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B)
12.3424
done
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C)
7.0
done
clear
D)
14.0
done
clear
View Answer play_arrow
question_answer 150) Calculate the first dissociation constant of\[{{H}_{3}}P{{O}_{4}}\]if the emf of the cell: \[Hg|H{{g}_{2}}C{{l}_{2}}(s)|KCl(salt)||{{H}_{3}}P{{O}_{4}}(0.1)M;\]\[Na{{H}_{2}}P{{O}_{4}}(0.1)|{{H}_{2}}(1\,atm)pt\] is \[-0.3665\text{ }V.\text{ E}_{red}^{o}\,of\text{ }SHE=0.2412\text{ }V\]
A)
\[7.583\times {{10}^{-5}}\]
done
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B)
\[6.583\times {{10}^{-5}}\]
done
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C)
\[7.03\times {{10}^{-5}}\]
done
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D)
\[7.583\times {{10}^{-3}}\]
done
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question_answer 151) All cells contain:
A)
mitochondria and nucleus
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B)
Golgi bodies
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C)
chloroplast
done
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D)
ribosomes
done
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question_answer 152) In cells, centrioles occur:
A)
singly
done
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B)
in duplets
done
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C)
in triplets
done
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D)
none of these
done
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question_answer 153) Golgi bodies are absent in :
A)
RBC
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B)
sieve tubes
done
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C)
prokaryotes
done
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D)
all of these
done
clear
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question_answer 154) Plasma membrane is made up of:
A)
carbohydrates and fats
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B)
carbohydrates and proteins
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C)
proteins and fats
done
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D)
fats only
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question_answer 155) Which of the following gives mechanical support to the cell?
A)
Chloroplasts
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B)
Mitochondria
done
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C)
Ribosomes
done
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D)
Endoplasmic reticulum
done
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View Answer play_arrow
question_answer 156) Which of the following constitutes unit membrane?
A)
Golgian membrane
done
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B)
ER membrane
done
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C)
Plasma membrane
done
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D)
All of the above
done
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question_answer 157) In ribosomes letter S signifies :
A)
sedimentation coefficient
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B)
Svedbergs constant
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C)
both (a) and (b)
done
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D)
none of the above
done
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question_answer 158) Showy and attractive colour of fruits is due to the presence of:
A)
chloroplasts
done
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B)
leucoplasts
done
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C)
chromoplasts
done
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D)
amvloplasts
done
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question_answer 159) Cell was discovered by :
A)
Robert Brown
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B)
Robert Hooke
done
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C)
Camillo Golgi
done
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D)
None of these
done
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question_answer 160) Mitochondria are absent in :
A)
red algae
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B)
green algae
done
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C)
brown algae
done
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D)
bacteria
done
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question_answer 161) Cell theory was proposed by :
A)
Robert Hooke
done
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B)
Schleiden and Schwann
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C)
Robert Brown
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D)
None of the above
done
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question_answer 162) Predominant pith is found in:
A)
dicot root and monocot stem
done
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B)
dicot stem and dicot root
done
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C)
dicot stem and monocot stem
done
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D)
dicot stem and monocot root
done
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question_answer 163) Dorsiventral leaf has:
A)
spongy parenchyma on upper side
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B)
spongy parenchyma on both side
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C)
palisade parenchyma on lower side
done
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D)
palisade parenchyma on upper side
done
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question_answer 164) Monocots do not show secondary growth because their vascular bundles are:
A)
open
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B)
closed
done
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C)
scattered
done
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D)
radial
done
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question_answer 165) Vascular cambium is a :
A)
primary meristem
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B)
intercalary meristem
done
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C)
secondary growth
done
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D)
lateral meristem
done
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View Answer play_arrow
question_answer 166) The net gain of ATP in anaerobic respiration is:
A)
2
done
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B)
4
done
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C)
36
done
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D)
32
done
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View Answer play_arrow
question_answer 167) Citric acid cycle is also called :
A)
Krebs cycle
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B)
TCA cycle
done
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C)
tricarboxylic acid cycle
done
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D)
all of the above
done
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View Answer play_arrow
question_answer 168) Which of the following fungus is related to discovery of gibberellins ?
A)
Fusarium pernoesum
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B)
Fusarium noriform
done
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C)
Fusarium monoliformae
done
clear
D)
ergot fungus
done
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question_answer 169) Which of the following is not an auxin?
A)
IAA
done
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B)
IBA
done
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C)
NAA
done
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D)
Zeatin
done
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question_answer 170) A fixed board is at a height of 2 m from the ground level on the tree which grows 1.5 m per year. What is the height of the board after 5 years ?
A)
2 m
done
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B)
7.5 m
done
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C)
5 m
done
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D)
7 m
done
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question_answer 171) Chlamydornonas reproduces by :
A)
zoospore formation
done
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B)
aplanospore formation
done
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C)
hypnospore formation
done
clear
D)
all of the above
done
clear
View Answer play_arrow
question_answer 172) In Rhizopus heterothalism occurs which signifies that:
A)
torulla stage is found in Rhizopus
done
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B)
it reproduces parthenogenetically
done
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C)
two compatible opposite strains come close and their swollen ends join to form zygospore
done
clear
D)
all of the above
done
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View Answer play_arrow
question_answer 173) In Pinus :
A)
seed is winged but pollen grains are not
done
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B)
both seed and pollen grains are wingless
done
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C)
pollen grains are winged but seed is not
done
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D)
both seeds and pollen grains are winged
done
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View Answer play_arrow
question_answer 174) Study of flowers is called :
A)
Anthology
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B)
Pomology
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C)
Floriculture
done
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D)
Spermolgy
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question_answer 175) Viability of seeds can be tested by :
A)
triphenyl chloride
done
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B)
IAA
done
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C)
mercuric chloride
done
clear
D)
2, 4-D
done
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question_answer 176) The first product of \[C{{O}_{2}}\] fixation in \[{{C}_{4}}\]plants is:
A)
PGA
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B)
oxaloacetic acid
done
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C)
malic acid
done
clear
D)
PEP
done
clear
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question_answer 177) Pollination by bats is called :
A)
ornithophily
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B)
anemophily
done
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C)
entomophily
done
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D)
chiropterophily
done
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question_answer 178) Meiotic divisions are required for forming 100 zygotes/grain of wheat is :
A)
100
done
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B)
75
done
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C)
125
done
clear
D)
50
done
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question_answer 179) Seed is:
A)
developed ovule
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B)
developed ova 17
done
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C)
fertilized and developed ovule
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D)
fertilized and developed ovary
done
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View Answer play_arrow
question_answer 180) Selection of homozygous plant is :
A)
mass selection
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B)
pure line selection
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C)
mixed selection
done
clear
D)
none of the above
done
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question_answer 181) Emasculation means :
A)
removal of carpels
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B)
removal of anthers
done
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C)
removal of pistils
done
clear
D)
all of the above
done
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question_answer 182) Which of the following is best fertilizer for paddy ?
A)
Azolla pinnaca
done
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B)
Bacillus polymixa
done
clear
C)
Anthoceros
done
clear
D)
Rhizobium
done
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question_answer 183) DEVINER and COLLEGOR are two trade names in agriculture. They are used as :
A)
bioinsecticides
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B)
natural insecticides
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C)
biofungicides
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D)
bioherbicides
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question_answer 184) The process by which language of DNA is covnerted into language of m-RNA is called :
A)
transformation
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B)
transcription
done
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C)
translation
done
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D)
transduction
done
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question_answer 185) Which of the following is a sex linked disease ?
A)
Colour blindness
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B)
Rickets
done
clear
C)
Diphtheria
done
clear
D)
Beri-beri
done
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question_answer 186) In sickle cell anaemia there is deformity of:
A)
WBCs
done
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B)
platelets
done
clear
C)
RBCs
done
clear
D)
none of these
done
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View Answer play_arrow
question_answer 187) Number of autosomes in human sex cells is :
A)
22
done
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B)
12
done
clear
C)
44
done
clear
D)
23
done
clear
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question_answer 188) Which of the following is not seen in RNA?
A)
Thymine
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B)
Uracil
done
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C)
Adenine
done
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D)
Guanine
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question_answer 189) Meiosis occurs in :
A)
somatic cells only
done
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B)
germ cells only
done
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C)
both (a) and (b)
done
clear
D)
none of the above
done
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View Answer play_arrow
question_answer 190) Science dealing with factors which improve successive generations of humans is called :
A)
Euphenics
done
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B)
Euthenics
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clear
C)
Eugenics
done
clear
D)
None of these
done
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View Answer play_arrow
question_answer 191) A person met with an accident and there is no time to check his blood group, which of the following must be given to him?
A)
\[OR{{h}^{+}}\]
done
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B)
\[OR{{h}^{-}}\]
done
clear
C)
\[ABR{{h}^{+}}\]
done
clear
D)
\[ABR{{h}^{-}}\]
done
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question_answer 192) Nissls granules are characteristic of:
A)
muscle tissue
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B)
connective tissue
done
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C)
nerve tissue
done
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D)
epithelial tissue
done
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question_answer 193) Urea production occurs in :
A)
kidneys
done
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B)
ureters
done
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C)
urinary bladder
done
clear
D)
none of the above
done
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View Answer play_arrow
question_answer 194) Villi present in intestine help in :
A)
secreting enzymes
done
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B)
increasing surface area for absorption
done
clear
C)
protection
done
clear
D)
none of the above
done
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View Answer play_arrow
question_answer 195) Heart beat originates from
A)
AV node
done
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B)
SA node
done
clear
C)
AV bundle
done
clear
D)
none of these
done
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View Answer play_arrow
question_answer 196) The pigment rhodopsin is present in :
A)
choroids
done
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B)
retina
done
clear
C)
sclera
done
clear
D)
cornea
done
clear
View Answer play_arrow
question_answer 197) A hypermetropic person :
A)
can see far objects
done
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B)
can see nearer objects
done
clear
C)
cannot see in the above cases
done
clear
D)
can see in both (a) and (b)
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View Answer play_arrow
question_answer 198) The hormone which regulates reabsorption of water in kidney tubules is :
A)
ACTH from adenohypophysis
done
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B)
ACTH from adrenal cortex
done
clear
C)
oxytocin from neurohypophysis
done
clear
D)
ADH (vasopressin) from neurohypophysis
done
clear
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question_answer 199) Surgical removal of vas deferens is called :
A)
tubectomy
done
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B)
vasectomy
done
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C)
vasectolysis
done
clear
D)
none of these
done
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View Answer play_arrow
question_answer 200) Fertilization of ovum in human being occurs in:
A)
fallopian tube
done
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B)
cervix
done
clear
C)
Fund
done
clear
D)
none of these
done
clear
View Answer play_arrow
question_answer 201) Release of mature Graafian follicle from ovary is called :
A)
menstruation
done
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B)
ovulation
done
clear
C)
estrous cycle
done
clear
D)
none of the above
done
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View Answer play_arrow
question_answer 202) Islets of Langerhans occur in :
A)
liver
done
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B)
intestine
done
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C)
stomach
done
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D)
pancreas
done
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question_answer 203) AIDS stand for :
A)
All India Diphtherial Society
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B)
An Infants Disease Syndrome
done
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C)
Acquired Immune Deficiency Syndrome
done
clear
D)
None of the above
done
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View Answer play_arrow
question_answer 204) Tape worm occurs as a parasite in :
A)
liver
done
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B)
stomach
done
clear
C)
intestine
done
clear
D)
all of these
done
clear
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question_answer 205) Acid rain is caused due to :
A)
\[S{{O}_{2}}\] and \[N{{O}_{2}}\]
done
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B)
release of \[{{O}_{3}}\] in air
done
clear
C)
release of \[CO\] and \[C{{O}_{2}}\] in air
done
clear
D)
excessive transpiration and evaporation
done
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question_answer 206) Which of the following are ectodermal in origin?
A)
spinal cord and brain
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B)
heart and kidney
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C)
muscles
done
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D)
all of the above
done
clear
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question_answer 207) The excretory organs of platyhelminthes are :
A)
Malpighian tubules
done
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B)
flame cells (solenocytes)
done
clear
C)
green glands
done
clear
D)
none of the above
done
clear
View Answer play_arrow
question_answer 208) Hydra can paralyse prey-toy :
A)
nematocysts
done
clear
B)
tentacles
done
clear
C)
mouth
done
clear
D)
none of these
done
clear
View Answer play_arrow
question_answer 209) Insects have :
A)
3 pairs of legs
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B)
4 pairs of legs
done
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C)
5 pairs of legs
done
clear
D)
none of these
done
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View Answer play_arrow
question_answer 210) Which of the following is cold blooded ?
A)
Frog
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B)
Penguin
done
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C)
Owl
done
clear
D)
All of these
done
clear
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question_answer 211) Flight muscles of bird are attached to :
A)
keel of sternum
done
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B)
clavicle
done
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C)
pelvic girdle
done
clear
D)
humerus
done
clear
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question_answer 212) Seismonasty represents:
A)
turgor movement
done
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B)
shock movement brought about by external stimuli
done
clear
C)
both (a) and (b)
done
clear
D)
none of the above
done
clear
View Answer play_arrow
question_answer 213) Chlamydornonas shows :
A)
isogamy
done
clear
B)
anisogamy
done
clear
C)
oogamy
done
clear
D)
all of these
done
clear
View Answer play_arrow
question_answer 214) Chilgoza pinus is :
A)
Pinus gerardiana
done
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B)
Pinus roxburghi
done
clear
C)
Pinus wallichiana
done
clear
D)
Pinus merkurii
done
clear
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question_answer 215) Whales are :
A)
reptiles
done
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B)
mammals
done
clear
C)
fishes
done
clear
D)
none of these
done
clear
View Answer play_arrow
question_answer 216) Penicillin was discovered by :
A)
Robert Koch
done
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B)
Alexander Flemming
done
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C)
Louis Pasteur
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D)
Bronchi
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question_answer 217) Average life span of an erythrocyte is :
A)
120 days
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B)
one year
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C)
120 weeks
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D)
6 months
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question_answer 218) In earthworms, ovaries occur in :
A)
12th segment
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B)
27th segment
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C)
14th segment
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D)
none of these
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question_answer 219) Nucleus was discovered by :
A)
Robert Brown
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B)
Robert Hooke
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C)
Leeuwenhoek
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D)
None of the above
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question_answer 220) Which of the following prevents food from going into trachea?
A)
glottis
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B)
pharynx
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C)
epiglottis
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D)
bronchi
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question_answer 221) Name the hormone associated with the metabolism of phosphorus and calcium?
A)
glucocorticoids
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B)
mineralocorticoids
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C)
calcitonin
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D)
glucagon
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question_answer 222) Which is most important in speciation?
A)
Geographical isolation
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B)
Reproductive isolation
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C)
Ecological isolation
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D)
Ethological isolation
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question_answer 223) Which is non-invasive technique of genetic counselling?
A)
Amniocentesis
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B)
Chorionic biopsy
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C)
Foetal blood sampling
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D)
Ultrasonography
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question_answer 224) Hill reaction was demonstrated :
A)
in the absence of water
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B)
in the absence of carbon dioxide
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C)
in the presence of carbon dioxide
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D)
in the absence of a suitable electron acceptor
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question_answer 225) In a cell cycle the RNA synthesis, needed in protein synthesis, occurs in :
A)
synthetic period
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B)
post-mitotic gap period
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C)
pre-mitotic gap period
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D)
prophase
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