question_answer 1)
Two springs of spring constants \[{{k}_{1}}\] and \[{{k}_{2}}\] are joined in series and a mass m is attached to them as shown in figure. The time-period of oscillations of the springs is
A)
\[T=\pi \sqrt{\frac{m({{k}_{1}}+{{k}_{2}})}{{{k}_{1}}{{k}_{2}}}}\]
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B)
\[T=2\pi \sqrt{\frac{m({{k}_{1}}+{{k}_{2}})}{{{k}_{1}}{{k}_{2}}}}\]
done
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C)
\[T=2\pi \sqrt{\frac{m}{{{k}_{1}}+{{k}_{2}}}}\]
done
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D)
\[T=2\pi \sqrt{\frac{m({{k}_{1}}+{{k}_{2}})}{2{{k}_{1}}{{k}_{2}}}}\]
done
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question_answer 2) A hot body at temperature T losses heat to the surrounding temperature Ts by radiation. If the difference in temperature is small then, the rate of loss of heat by the hot body is proportional to
A)
\[(T-Ts)\]
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B)
\[{{(TTs)}^{2}}\]
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C)
\[{{(T-{{T}_{s}})}^{1/2}}\]
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D)
\[{{(T-{{T}_{s}})}^{4}}\]
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question_answer 3) Which one of the following statement is not correct in the case of light emitting diodes?
A)
It is a heavily doped p-n junction
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B)
It emits light only when it is forward biased
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C)
It emits light only when it is reverse biased
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D)
The energy of the light emitted is less than the energy of the semiconductor used
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question_answer 4) Which one of the following cannot be used as a moderator in a nuclear reactor?
A)
Water
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B)
Heavy water
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C)
Molten sodium
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D)
Graphite
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question_answer 5) The fraction of a sample of radioactive nuclei that remains undecayed after one mean life is
A)
\[\frac{1}{e}\]
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B)
\[1-\frac{1}{e}\]
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C)
\[\frac{1}{{{e}^{2}}}\]
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D)
\[1-\frac{1}{{{e}^{2}}}\]
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question_answer 6) If the radius of a nucleus of mass number 3 is R, then the radius of a nucleus of mass number 81 is
A)
3 R
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B)
9R
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C)
\[{{(27)}^{1/2}}R\]
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D)
25R
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question_answer 7) In hydrogen atom, which one of the following transitions is most energetic?
A)
\[{{n}_{1}}=2\to {{n}_{2}}=1\]
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B)
\[{{n}_{1}}=3\to {{n}_{2}}=1\]
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C)
\[{{n}_{1}}=10\to {{n}_{2}}=2\]
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D)
\[{{n}_{1}}=100\to {{n}_{2}}=3\]
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question_answer 8) A common example of \[{{\beta }^{-}}\] decay is \[_{15}{{p}^{32}}{{\to }_{16}}{{S}^{32}}+x+y.\]Then x and y stand for
A)
electron and neutrino
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B)
positron and neutrino
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C)
electron and antineutrino
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D)
positron and antineutrino
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question_answer 9) Based on the energy band description, a solid can be classified as insulator the energy gap between the valance band and conduction band is
A)
\[3eV<{{E}_{g}}<6ev\]
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B)
\[{{E}_{g}}>6eV\]
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C)
\[{{E}_{g}}<3eV\]
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D)
\[{{E}_{g}}=0eV\]
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question_answer 10)
In the diagram, a system of two metals of equal lengths and of same cross-sectional area are joined together. The coefficient of thermal conductivities of the metals are K and 2K respectively. If the furnace temperature at one end is \[300{}^\circ C\] and ice box temperature at the other end is \[0{}^\circ C\], then the junction temperature is
A)
\[100{}^\circ C\]
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B)
\[125{}^\circ C\]
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C)
\[150{}^\circ C\]
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D)
\[200{}^\circ C\]
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question_answer 11) A Carnot cycle has the reversible processes in the following order
A)
isothermal expansion, adiabatic expansion, isothermal compression and adiabatic compression
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B)
isothermal compression, adiabatic expansion, isothermal expansion and adiabatic compression
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C)
isothermal expansion, adiabatic compression, isothermal compression and adiabatic expansion
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D)
adiabatic expansion, isothermal expansion, adiabatic compression and isothermal compression
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question_answer 12) Through which mode of propagation, the radio waves can be sent from one place to another
A)
ground wave propagation
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B)
sky wave propagation
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C)
space wave propagation
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D)
All of them
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question_answer 13)
The logic operation carried out by the circuit below is that of
A)
AND gate
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B)
OR gate
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C)
NOT gate
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D)
NAND gate
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question_answer 14) If \[\beta ,{{R}_{L}}\]and r are the AC current gain, load resistance and the input resistance of a transistor respectively in CE configuration, the voltage and the power gains respectively are
A)
\[\beta \frac{{{R}_{L}}}{r}and{{\beta }^{2}}\frac{{{R}_{L}}}{r}\]
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B)
\[\beta \frac{r}{{{R}_{L}}}and{{\beta }^{2}}\frac{{{r}_{{}}}}{{{R}_{L}}}\]
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C)
\[\beta \frac{{{R}_{L}}}{r}and\beta {{\left( \frac{{{R}_{L}}}{r} \right)}^{2}}\]
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D)
\[\beta \frac{{{R}_{L}}}{r}and\beta {{\left( \frac{{{R}_{L}}}{r} \right)}^{2}}\]
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question_answer 15) A message signal of frequency 5 kHz and peak voltage 10 V is used to amplify modulate a carrier wave with frequency 1 MHz and peak voltage 20 V. The side bands produced are
A)
\[\text{(}1000\pm 5\text{) }kHz\]
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B)
\[(1000\pm 7.5)kHz\]
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C)
\[\text{(}1000+~10\text{) }kHz\]
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D)
\[(1000\pm 15)kHz\]
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question_answer 16) The volume of one mole of an ideal gas changes from V to 2 V at temperature 327°C. If R is the universal gas constant, then the work done in this process is
A)
300 R In 2
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B)
600 R In 2
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C)
300 In 2
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D)
600 In 2
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question_answer 17) A wooden piece can float both in mercury (of density 13.6 g/cc) and in water (of density g/cc). The ratio of mass of mercury displaced to the mass of water displaced is
A)
1
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B)
13.6
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C)
\[\frac{1}{13.6}\]
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D)
\[\frac{12.6}{13.6}\]
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question_answer 18) A container of height 10 m which is open at the top, has water to its full height. Two small openings are made on the wall of the container one exactly at the middle and the other at the bottom. The ratio of the velocities with which water comes out from the middle and the bottom region respectively is
A)
2
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B)
\[\frac{1}{2}\]
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C)
\[\sqrt{2}\]
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D)
\[\frac{1}{\sqrt{2}}\]
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question_answer 19) If the radius of a spherical liquid (of surface tension S) drop increases from r to r + \[\Delta \]r, the corresponding increase in the surface energy is
A)
\[8\pi r\Delta rS\]
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B)
\[4\pi r\Delta rS\]
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C)
\[16\pi r\Delta rS\]
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D)
\[2\pi r\Delta rS\]
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question_answer 20) Which one of the following is not an assumption in the kinetic theory of gases?
A)
The volume occupied by the molecules of the gas is negligible
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B)
The force of attraction between the molecules is negligible
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C)
The collision between molecules are elastic
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D)
All molecules have some speed
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question_answer 21) The crystal structure can be studied using
A)
UV rays
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B)
X-rays
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C)
IR radiation
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D)
Microwave
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question_answer 22) The number of turns of the primary and the secondary coils of a transformer are 10 and 100 respectively. The primary voltage and the current are given as 2 V and 1 A. Assuming the efficiency of the transformer as 90%, the secondary voltage and the current respectively are
A)
20 V and 0.1 A
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B)
0.2 V and 1 A
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C)
20 V and 0.09 A
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D)
0.2 V and 0.9 A
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question_answer 23) Which one of the following units is not that of mutual inductance?
A)
Henry
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B)
Weber
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C)
Ohm-second
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D)
Volt-second-(ampere)-1
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question_answer 24) In an L-C-R series AC circuit at resonance
A)
the capacitive reactance is more than the inductive reactance
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B)
the capacitive reactance equals the inductive reactance
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C)
the capacitive reactance is less than the inductive reactance
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D)
the power dissipated is minimum
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question_answer 25) In an L-C-R serries resonant circuit which one of the following cannot be the expression for the Q-factor
A)
\[\frac{\omega L}{R}\]
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B)
\[\frac{1}{\omega CR}\]
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C)
\[\sqrt{\frac{L}{C}\,\frac{1}{R}}\]
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D)
\[\frac{R}{LC}\]
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question_answer 26) If the eighth bright band due to light of wavelength \[{{\lambda }_{1}}\]coincides with ninth bright band from light of wavelength \[{{\lambda }_{2}}\] in Youngs double slit experiment, then the possible wavelengths of visible light are
A)
400 nm and 450 nm
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B)
425 nm and 400 nm
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C)
400 nm and 425 nm
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D)
450 nm and 400 nm
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question_answer 27) The elastic energy stored per unit volume in a stretched wire is
A)
\[\frac{1}{2}\]- (Young modulus) (Strain)2
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B)
\[\frac{1}{2}\]- (Stress) (Strain)2
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C)
\[\frac{1}{2}\frac{Stress}{Strain}\]
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D)
\[\frac{1}{2}\]- (Young modulus) (Stress)
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question_answer 28) The electromagnetic waves of frequency 2 MHz to 30 MHz are used
A)
in ground wave propagation
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B)
in sky wave propagation
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C)
in microwave propagation
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D)
in satellite communication
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question_answer 29) Assuming that the earth is a sphere of radius RE with uniform density, the distance from its centre at which the acceleration due to gravity a is equal to \[\frac{g}{3}\](g = the acceleration due to gravity on the surface of earth) is
A)
\[\frac{{{R}_{E}}}{3}\]
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B)
\[2\frac{{{R}_{E}}}{3}\]
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C)
\[\frac{{{R}_{E}}}{2}\]
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D)
\[\frac{{{R}_{E}}}{4}\]
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question_answer 30) The terminal velocity of a rain drop of radius r is \[2cm\text{ }{{s}^{-1}}.\] If eight such identical drops combine to form a single large drop, the terminal velocity would be
A)
\[1\text{ }cm\text{ }{{s}^{-1}}\]
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B)
\[2\text{ }cm\text{ }{{s}^{-1}}\]
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C)
\[4\text{ }cm\text{ }{{s}^{-1}}\]
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D)
\[8\text{ }cm\text{ }{{s}^{-1}}\]
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question_answer 31) The maximum kinetic energy of photoelectrons
A)
varies linearly with the frequency of the incident radiation
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B)
varies linearly with the wavelength of incident light
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C)
proportional to the frequency of the incident radiation
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D)
proportional to the square of the frequency of incident radiation
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question_answer 32) Which one of the following is not associated with the total internal reflection?
A)
The mirage formation
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B)
Optical fibre communication
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C)
The glittering of diamond
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D)
Dispersion of light
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question_answer 33) The angular width of the central maximum of the diffraction pattern in a single slit (of width a) experiment, with \[\lambda \] as the wavelength of light, is
A)
\[\frac{3\lambda }{2a}\]
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B)
\[\frac{\lambda }{2a}\]
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C)
\[\frac{2\lambda }{a}\]
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D)
\[\frac{\lambda }{a}\]
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question_answer 34) The Brewster angle for the glass-air interface is \[54.74{}^\circ \]. If a ray of light going from air to glass strikes at an angle of incidence \[45{}^\circ \], then the angle of refraction is (Given, tan \[54.74{}^\circ \]= \[\sqrt{2}\])
A)
\[60{}^\circ \]
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B)
\[30{}^\circ \]
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C)
\[25{}^\circ \]
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D)
\[54.74{}^\circ \]
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question_answer 35) When sun light is scattered by minute particles of atmosphere, the intensity of light scattered away is proportional to
A)
(wavelength of light)4
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B)
(frequency of light)4
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C)
(wavelength of light)2
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D)
(frequency of light)2
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question_answer 36) If K be the kinetic energy and m the mass of a moving particle, then the de-Broglie wavelength of the particle is
A)
\[\lambda =\frac{h}{\sqrt{mk}}\]
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B)
\[\lambda =\frac{2h}{\sqrt{mk}}\]
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C)
\[\lambda =\frac{h}{2\sqrt{mk}}\]
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D)
\[\lambda =\frac{h}{\sqrt{2mk}}\]
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question_answer 37) The radius of gyration of a thin uniform circular disc (of radius R) about an axis passing through its centre and lying in its plane is
A)
R
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B)
\[\frac{R}{\sqrt{2}}\]
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C)
\[\frac{R}{4}\]
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D)
\[\frac{R}{2}\]
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question_answer 38) Two particles of masses 1 kg and 2 kg are located at \[{{x}_{1}}=0,{{y}_{1}}=0\,\,and\,\,\,{{x}_{2}}=1,{{y}_{2}}=0\] respectively. The centre of mass of the system is at
A)
\[x=1;\,\,\,y=2\]
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B)
\[x=2;\,\,\,y=1\]
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C)
\[x=\frac{1}{3};\,\,y\frac{2}{3}\]
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D)
\[x=\frac{2}{3};\,\,y\frac{1}{3}\]
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E)
(e) None of the above
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question_answer 39) The energy that is associated with one gram of mass is
A)
\[9\times {{10}^{-13}}J\]
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B)
\[9\times {{10}^{-16}}J\]
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C)
\[9\times 1013\text{ }J\]
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D)
\[9\times {{10}^{16}}J\]
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question_answer 40) If the polar ice caps were to melt suddenly
A)
the length of the day will be more than 24 h
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B)
the length of the day will be less than 24 h
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C)
the length of the day will remain as 24 h
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D)
the length of the day will become more than 24 h initially and then becomes equal to 24 h
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question_answer 41) The work done in taking an object of mass m from the surface of earth to a height h = R, where R is the radius of the earth, is
A)
mgR
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B)
\[\frac{1}{2}mgR\]
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C)
\[\frac{1}{3}mgR\]
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D)
\[\frac{2}{3}mgR\]
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question_answer 42) The inversion temperature of a copper-iron thermocouple is \[540{}^\circ C\] when the cold junction temperature is \[0{}^\circ C\]. If the cold junction temperature is increased by \[10{}^\circ C\], then the inversion temperature and the neutral temperature of the thermocouple respectively are
A)
\[270{}^\circ C\text{ } and \text{ }530{}^\circ C\]
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B)
\[270{}^\circ C\text{ } and \text{ }550{}^\circ C\]
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C)
\[280{}^\circ C\text{ } and \text{ }530{}^\circ C\]
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D)
\[280{}^\circ C\text{ } and \text{ }550{}^\circ C\]
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question_answer 43) Two bulbs marked 60 W, 220 V and 100 W, 220 V are connected in series and the series combination is now connected across a 220 V mains supply. The power dissipated in the circuit is
A)
37.5 W
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B)
75 W
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C)
80 W
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D)
40 W
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question_answer 44)
The steady state current through the battery in the circuit given below is
A)
17A
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B)
7A
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C)
zero
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D)
\[\frac{10}{7}A\]
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question_answer 45) Two concentric circular loops of radii R and 2R carry currents of 2i and i respectively in opposite sense (ie, clockwise in one coil and counter-clockwise in the other coil). The resultant magnetic field at their common centre is
A)
\[{{\mu }_{0}}\frac{i}{4R}\]
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B)
\[{{\mu }_{0}}\frac{5i}{4R}\]
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C)
\[{{\mu }_{0}}\frac{3i}{4R}\]
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D)
\[{{\mu }_{0}}\frac{i}{2R}\]
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question_answer 46)
Three identical spherical balls A, B and C are placed on a table as shown in the figure along a straight line. B and C are at rest initially. The ball A hits B head on with a speed of \[10\text{ }m{{s}^{-1}}.\] Then after all collisions (assumed to be elastic) A and B are brought to rest and C takes off with a velocity of
A)
\[5m{{s}^{-1}}\]
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B)
\[10m{{s}^{-1}}\]
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C)
\[2.5m{{s}^{-1}}\]
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D)
\[7.5m{{s}^{-1}}\]
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question_answer 47) An object placed on an inclined plane starts sliding when the angle of incline becomes 30°. The coefficient of static friction between the object and the plane is
A)
\[\frac{1}{\sqrt{3}}\]
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B)
\[\sqrt{3}\]
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C)
\[\frac{1}{2}\]
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D)
\[\frac{\sqrt{3}}{2}\]
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question_answer 48)
Given below is a graph between a variable force (F) (along y-axis) and the displacement (x) (along x-axis) of a particle in one dimension. The work done by the force in the displacement interval between 0 m and 30 m is
A)
275 J
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B)
375 J
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C)
400 J
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D)
300 J
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question_answer 49) The mobility of free electrons (charge = e, mass = m and relaxation time = x) in a metal is proportional to
A)
\[\frac{e}{m}\tau \]
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B)
\[\frac{m}{e}\tau \]
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C)
\[\frac{e}{m\tau }\]
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D)
\[\frac{m}{e\tau }\]
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question_answer 50) n identical capacitors each of capacitance C when connected in parallel give the effective capacitance 90 \[\mu F\]and when connected in series give 2.5\[\mu F\] Then the values of n and C respectively are
A)
6 and 15 \[\mu F\]
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B)
5 and 18 \[\mu F\]
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C)
15 and 6 \[\mu F\]
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D)
18 and 5 \[\mu F\]
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question_answer 51) A capacitor is charged by a battery and the energy stored is U. The battery is now removed and the separation distance between the plates is doubled. The energy stored now is
A)
\[\frac{u}{2}\]
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B)
U
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C)
2 U
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D)
4U
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question_answer 52) The number of ways one can arrange three identical capacitors to obtain distinct effective capacitances is
A)
8
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B)
6
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C)
4
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D)
3
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question_answer 53) When a uniform wire of resistance R is stretched uniformly to increase its length by 10%, the new resistance value would
A)
remain as R
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B)
become 1.21 R
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C)
become 1.10 R
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D)
become 1.20 R
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question_answer 54) Rocket propulsion is associated with
A)
the conservation of angular momentum
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B)
the conservation of mass
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C)
the conservation of mechanical energy
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D)
Newtons third law of motion
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question_answer 55) Which one of the following statements is not correct in uniform circular motion?
A)
The speed of the particle remains constant
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B)
The acceleration always points towards the centre
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C)
The angular speed remains constant
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D)
The velocity remains constant
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question_answer 56) If a car is to travel with a speed v along a frictionless, banked circular track of radius r, the required angle of banking so that the car does skid, is
A)
\[\theta ={{\tan }^{-1}}\left( \frac{{{v}^{2}}}{rg} \right)\]
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B)
\[\theta ={{\tan }^{-1}}\left( \frac{v}{rg} \right)\]
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C)
\[\theta ={{\tan }^{-1}}\left( \frac{{{r}^{2}}}{vg} \right)\]
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D)
\[\theta <{{\tan }^{-1}}\left( \frac{{{v}^{2}}}{vg} \right)\]
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question_answer 57) Three forces \[{{F}_{1}}{{F}_{2}}\]and \[{{F}_{3}}\]together keep a body in equilibrium. If \[{{F}_{1}}=\text{ }3\text{ }N\]along the positive x-axis, \[{{F}_{2}}=\text{ }4\text{ }N\]along the positive y-axis, then the third force \[{{F}_{3}}\]is
A)
5 N making an angle \[\theta ={{\tan }^{-1}}\left( \frac{3}{4} \right)\]with the negative y-axis
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B)
5 N making an angle \[\theta ={{\tan }^{-1}}\left( \frac{4}{3} \right)\]with the negative y-axis
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C)
7 N making an angle \[\theta ={{\tan }^{-1}}\left( \frac{3}{4} \right)\] with the negative y-axis
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D)
7 N making an angle \[\theta ={{\tan }^{-1}}\left( \frac{4}{3} \right)\] with the negative y-axis
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question_answer 58) The electrostatic potential of a uniformly charged thin spherical shell of charge Q and radius R at a distance r from the centre is
A)
\[\frac{Q}{4\pi {{\varepsilon }_{0}}r}\]for points outside and \[\frac{Q}{4\pi {{\varepsilon }_{0}}R}\]points inside the shell
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B)
\[\frac{Q}{4\pi {{\varepsilon }_{0}}r}\]for both points inside and outside the shell
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C)
zero for points outside and\[\frac{Q}{4\pi {{\varepsilon }_{0}}r}\]for points inside the shell
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D)
zero for both points inside and outside the shell
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question_answer 59) The electric field and the potential of an electric dipole vary with distance r as
A)
\[\frac{1}{r}and\frac{1}{{{r}^{2}}}\]
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B)
\[\frac{1}{{{r}^{2}}}and\frac{1}{r}\]
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C)
\[\frac{1}{{{r}^{2}}}and\frac{1}{{{r}^{3}}}\]
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D)
\[\frac{1}{{{r}^{3}}}and\frac{1}{{{r}^{2}}}\]
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question_answer 60) A point charge Q is placed at one of the vertices of a cubical block. The electric flux flowing through this cube is
A)
\[\frac{Q}{6{{\varepsilon }_{0}}}\]
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B)
\[\frac{Q}{4{{\varepsilon }_{0}}}\]
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C)
\[\frac{Q}{8{{\varepsilon }_{0}}}\]
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D)
\[\frac{Q}{{{\varepsilon }_{0}}}\]
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question_answer 61) Two parallel infinite line charges + X and - X are placed with a separation distance R in free space. The net electric field exactly mid-way between the two line charges is
A)
zero
done
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B)
\[\frac{2\lambda }{\pi {{\varepsilon }_{0}}R}\]
done
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C)
\[\frac{\lambda }{\pi {{\varepsilon }_{0}}R}\]
done
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D)
\[\frac{1}{2\pi {{\varepsilon }_{0}}R}\]
done
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question_answer 62) A particle is thrown vertically up with a certain velocity. Assuming the air resistance to be negligible, which one of the following represents the velocity (along y-axis) time (along x-axis) graph for the entire motion of the particle till it reaches back to the ground
A)
done
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B)
done
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C)
done
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D)
done
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question_answer 63) The dimensions of the coefficient of viscosity are
A)
\[\left[ M{{L}^{-1}}{{T}^{-3}}\left. {} \right] \right.\]
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B)
\[\left[ M{{L}^{-2}}{{T}^{-3}}\left. {} \right] \right.\]
done
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C)
\[\left[ M{{L}^{-2}}{{T}^{-1}}\left. {} \right] \right.\]
done
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D)
\[\left[ ML{{T}^{-1}}\left. {} \right] \right.\]
done
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question_answer 64) The components of the sum of two vectors \[2\hat{i}+3\hat{J}\] and \[2\hat{J}+3\hat{k}\] along x and y directions respectively are
A)
2 and 5
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B)
4 and 6
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C)
2 and 6
done
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D)
4 and 3
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question_answer 65) An object is projected so that its horizontal range R is maximum. If the maximum height attained by the object is H, then the ratio of R/H is
A)
4
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B)
¼
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C)
2
done
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D)
1/2
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question_answer 66) Which one of the following is not a characteristics of diamagnetism?
A)
The diamagnetic materials are repelled by a bar magnet
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B)
The magnetic susceptibility of the materials is small and negative
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C)
The origin of diamagnetism is the spin of electrons
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D)
The material move from a region of strong magnetic field to weak magnetic field
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question_answer 67) When the number of turns of the coil is doubled, the current sensitivity of a moving coil galvanometer is doubled whereas, the voltage sensitivity of the galvanometer
A)
remains the same
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B)
is halved
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C)
is doubled
done
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D)
is quadrupled
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question_answer 68) Amperes circuital law is equivalent to
A)
Biot-Savart law
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B)
Coulombs law
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C)
Faradays law
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D)
Kirchoffs law
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question_answer 69) A proton, a deuteron and an alpha particle all having same momenta enter a uniform magnetic field and describe circular paths. The respective radii of their paths are in the ratio
A)
4 : 2 : 1
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B)
2 : 2 : 1
done
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C)
1 : 2 : 4
done
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D)
1 : 1 : 1
done
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question_answer 70) If the horizontal component of the earths magnetic field is 0.30 G, and the dip angle is \[60{}^\circ \] at a given place, then the value of earths total magnetic field is
A)
0.15 G
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B)
0.15 \[\sqrt{3}\] G
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C)
0.15\[\sqrt{2}\]G
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D)
0.60 G
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question_answer 71) If a current of 5 A in a coil of self inductance 2 mH is cut-off in time 0.1 s, the induced emf in the coil is
A)
0.1 V
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B)
0.01 V
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C)
0.2 V
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D)
0.02 V
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question_answer 72) A source of sound is approaching an observer with speed of 30 ms-1 and the observer is approaching the source with a speed of 60 ms-1. Then the fractional change in the frequency of sound (speed of sound in air\[=330\text{ }m{{s}^{-1}}\]) is
A)
\[\frac{1}{3}\]
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B)
\[\frac{3}{10}\]
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C)
\[\frac{2}{5}\]
done
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D)
\[\frac{2}{3}\]
done
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question_answer 73) A wave motion is described by y (x, t) = a sin (kx - \[\omega t\]). Then the ratio of the maximum particle velocity to the wave velocity is
A)
\[\omega a\]
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B)
\[\frac{1}{ka}\]
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C)
\[\frac{\omega }{k}\]
done
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D)
ka
done
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question_answer 74) The equation of a damped simple harmonic \[m\frac{{{d}^{2}}x}{d{{t}^{2}}}+b\frac{dx}{dt}+kx=o.\]motion is angular frequency of oscillation is
A)
\[\omega {{\left( \frac{k}{m}-\frac{{{b}^{2}}}{4{{m}^{2}}} \right)}^{1/2}}\]
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B)
\[\omega {{\left( \frac{k}{m}-\frac{b}{4m} \right)}^{1/2}}\]
done
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C)
\[\omega {{\left( \frac{k}{m}-\frac{{{b}^{2}}}{4m} \right)}^{1/2}}\]
done
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D)
\[\omega {{\left( \frac{k}{m}-\frac{{{b}^{2}}}{4{{m}^{2}}} \right)}^{1/2}}\]
done
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question_answer 75) The fundamental frequencies of an open and a closed tube, each of same length L with v as the speed of sound in air, respectively are
A)
\[\frac{v}{2L}and\frac{v}{L}\]
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B)
\[\frac{v}{L}and\frac{v}{2L}\]
done
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C)
\[\frac{v}{2L}and\frac{v}{4L}\]
done
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D)
\[\frac{v}{4L}and\frac{v}{2L}\]
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question_answer 76) For the reaction, \[{{N}_{2}}(g)+3{{H}_{2}}(g)2N{{H}_{3}}(g)\] at 400 K,\[{{K}_{p}}=41\]. Find the value for the following reaction \[\frac{1}{2}{{N}_{2}}(g)+\frac{3}{2}{{H}_{2}}(g)N{{H}_{3}}(g)\]
A)
6.4
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B)
0.02
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C)
50
done
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D)
4.6
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question_answer 77) What will be the resultant pH when 200 mL of an aqueous solution of\[HCl\]\[(pH=2.0)\]is mixed with 300 mL of an aqueous solution of\[NaOH\]\[(pH=12)\]?
A)
2.699
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B)
13.30
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C)
11.3010
done
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D)
1.330
done
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question_answer 78) Why do most chemical reaction rates increases rapidly as the temperature rises?
A)
The fraction of the molecules with kinetic energy greater than the activation energy increases rapidly with temperature
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B)
The average kinetic energy increases as temperature rises
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C)
The activation energy decreases as the temperature rises
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D)
More collision take place between particles so that the reaction can occur
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question_answer 79) To an equilibrium mixture of\[2S{{O}_{2}}(g)+{{O}_{2}}(g)2S{{O}_{3}}(g),\]some helium, an inert gas, is added at constant volume. The addition of helium causes the total pressure to double, which of the following is true?
A)
The concentration of all three gases is unchanged
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B)
The concentration of sulphur trioxide increases
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C)
The number of moles of sulphur trioxide increases
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D)
The concentration of sulphur dioxide increases
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question_answer 80) Identify the substance whose 0.1 M solution is basic?
A)
Ammonium chloride
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B)
Ammonium acetate
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C)
Ammonium sulphate
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D)
Sodium acetate
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question_answer 81) The vapour pressure of pure liquid solvent is 0.80 atm. When a non-volatile substance B is added to the solvent, its vapour pressure drops to 0.6 atm. What is the mole fraction of component B in this solution?
A)
0.75
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B)
0.25
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C)
0.48
done
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D)
0.3
done
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question_answer 82) The standard enthalpy of formation of\[{{H}_{2}}(g)\] and\[C{{l}_{2}}(g)\]and\[HCl(g)\]are 218 kJ/mol, 121.68 kJ/mol and\[-92.31\text{ }kJ/mol\]respectively. Calculate standard enthalpy change in kJ for \[\frac{1}{2}{{H}_{2}}(g)+\frac{1}{2}C{{l}_{2}}(g)\xrightarrow{{}}HCl(g)\]
A)
\[+\,431.99\]
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B)
\[-\,246.37\]
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C)
\[-\,431.99\]
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D)
\[+\,247.37\]
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E)
None of the above
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question_answer 83) In which of the following pair the enthalpy of neutralization does not remain constant?
A)
\[HN{{O}_{3}}\]and\[NaOH\]
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B)
\[HCl\]and\[NaOH\]
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C)
HCN and\[NaOH\]
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D)
\[{{H}_{2}}S{{O}_{4}}\]and\[NaOH\]
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question_answer 84) A system is changed from an initial state to a final state by a manner such that\[\Delta H=q\]. If the change from the initial state to the final state were made by a different manner then \[\Delta H\]remains same but q changes because
A)
\[\Delta H\]is a path function and q is a state function
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B)
\[\Delta H\]is a state function and q is a path function
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C)
Both\[\Delta H\]and q are state function
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D)
Both\[\Delta H\]and q are path function
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question_answer 85) When water is cooled to ice, its entropy
A)
increases
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B)
decreases
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C)
remains same
done
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D)
becomes zero
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question_answer 86) The charge on\[Fe{{(OH)}_{3}}\]sol is due to
A)
adsorption of hydroxyl ion
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B)
adsorption of hydrogen ion
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C)
adsorption of ferric ion
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D)
absorption of ferric ion
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question_answer 87) Which of the following statement is true?
A)
Chemisorption forms multimolecular layer
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B)
Chemisorption is a reversible process
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C)
Chemisorption is independent of the pressure
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D)
Chemisorption has low enthalpy change
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question_answer 88) Identify the incorrect statement out of the following.
A)
Isoelectronic species have dissimilar ionic radii
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B)
Be and Al does not show diagonal relationship
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C)
Outer electronic configuration of halogen is\[n{{s}^{2}}.n{{p}^{7}}\]
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D)
In any period atomic radius of noble gas is the highest
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question_answer 89) According to VSEPR theory, the molecule that has T-shape is
A)
\[CI{{F}_{3}}\]
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B)
\[N{{H}_{3}}\]
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C)
\[B{{F}_{3}}\]
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D)
\[{{H}_{2}}O\]
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question_answer 90) Bakelite is the polymer of
A)
benzaldehyde and phenol
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B)
formaldehyde and phenol
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C)
formaldehyde and benzyl alcohol
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D)
acetaldehyde and phenol
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question_answer 91) Which of these elements is expected to have the lowest first ionisation potential?
A)
\[Sr\]
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B)
\[As\]
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C)
\[Xe\]
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D)
\[S\]
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question_answer 92) Which is false statement about LCAO?
A)
Addition of atomic orbital results in molecular orbital
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B)
Atomic orbital of nearly same energy combine to molecular orbital
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C)
Bonding molecular orbital occupies higher energy than the atomic orbitals
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D)
Each molecular orbital accommodate maximum of two electrons
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question_answer 93) Which one among the following statement about transition elements is incorrect?
A)
They show variable oxidation state
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B)
All the ions are coloured
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C)
They exhibit diamagnetic and paramagnetic properties
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D)
They exhibit catalytic properties
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question_answer 94) German silver is an alloy of
A)
copper, zinc and silver
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B)
copper, zinc and nickel
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C)
copper, zinc and tin
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D)
manganese, chromium and nickel
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question_answer 95) The metal-carbon bond in metal carbonyls possess
A)
only s character
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B)
only p character
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C)
both s and p character
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D)
only d character
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question_answer 96) Irregular trend in the standard reduction potential value of first row transition elements is due to
A)
regular variation of first and second ionisation enthalpies
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B)
irregular variation of sublimation enthalpies
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C)
regular variation of sublimation enthalpies
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D)
increase in the number of unpaired electrons
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question_answer 97) Which of the following lanthanoid ion is paramagnetic?
A)
\[C{{e}^{4+}}\]
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B)
\[Y{{b}^{2+}}\]
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C)
\[L{{u}^{3+}}\]
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D)
\[E{{u}^{2+}}\]
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question_answer 98) The complex\[{{[Co{{F}_{6}}]}^{4-}}\]is
A)
outer orbital and diamagnetic
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B)
inner orbital and paramagnetic
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C)
inner orbital and diamagnetic
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D)
outer orbital and paramagnetic
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question_answer 99) The oxidation number, d-orbital occupation and coordination number of Cr in the complex cis\[[Cr{{(en)}_{2}}C{{l}_{2}}]Cl\]are respectively
A)
+3, 3d and 4
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B)
+3, 4d and 6
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C)
+3, 3d and 6
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D)
+2, 3d and 6
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question_answer 100) Which is a non-aromatic compound?
A)
done
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B)
done
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C)
done
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D)
done
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question_answer 101) The number of isomers including stereoisomers possible for the compound having molecular formula\[{{C}_{4}}{{H}_{8}}\]is
A)
one
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B)
two
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C)
three
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D)
four
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question_answer 102) The correct order of decreasing acidic nature of\[{{H}_{2}}O,\text{ }ROH,\text{ }CH\equiv CH\]and\[N{{H}_{3}}\]is
A)
\[CH\equiv CH>{{H}_{2}}O>ROH>N{{H}_{3}}\]
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B)
\[{{H}_{2}}O>ROH>CH=CH>N{{H}_{3}}\]
done
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C)
\[ROH>N{{H}_{3}}>CH\equiv CH>{{H}_{2}}O\]
done
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D)
\[{{H}_{2}}O>ROH>N{{H}_{3}}>CH\equiv CH\]
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question_answer 103) Reaction between propene and hydrochloric acid to form iso-propyi chloride takes place through
A)
nucleophilic addition reaction
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B)
electrophilic substitution reaction
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C)
nucleophilic substitution reaction
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D)
electrophilic addition reaction
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question_answer 104) Stability of iso-butylene can be best explained by
A)
inductive effect
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B)
mesomeric effect
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C)
hyper conjugative effect
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D)
steric effect
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question_answer 105) The d and\[l\]enantiomers of an optically active compound differ in
A)
their boiling and melting point
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B)
their rotation of plane polarized light
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C)
their solubility
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D)
their refractive index
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question_answer 106) Cannizaro reaction is not given by
A)
methanol
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B)
phenyl methanol
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C)
2,2-dimethyl butanal
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D)
phenyl ethanol
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question_answer 107) Which of the following compound will have the smallest\[p{{K}_{a}}\]value?
A)
Benzoic acid
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B)
Formic acid
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C)
Acetic acid
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D)
Phenyl acetic acid
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question_answer 108) Ethyl alcohol cannot be used as a solvent for methyl magnesium iodide because
A)
methyl magnesium iodide reacts with alcohol giving methane
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B)
the reaction between them is explosive in nature
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C)
methyl magnesium iodide is converted to ethyl magnesium iodide
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D)
alcohol is immiscible with methyl magnesium iodide
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question_answer 109) Which is not true about acetophenone?
A)
It reacts with alkaline potassium permanganate followed by acid hydrolysis and forms benzoic acid
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B)
It reacts with iodine and sodium hydroxide to form tri-iodomethane
done
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C)
It is prepared by the reaction of benzene with benzoyl chloride in presence of anhydrous aluminium chloride
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D)
It does not react with freshly prepared ammoniacal silver nitrate solution
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question_answer 110) Formation of methyl tertiary butyl ether by he reaction of sodium tertiary butoxide and methyl bromide involves
A)
elimination reaction
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B)
electrophilic addition reaction
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C)
nucleophilic substitution unimolecular reaction
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D)
nucleophilic substitution bimolecular reaction
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question_answer 111) 10 g of a radioisotope is reduced to 1.25 g of active material after 12 yr. Therefore, the half-life of the isotope (in yr) is
A)
24
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B)
4
done
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C)
2
done
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D)
8
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question_answer 112) Out of the following, which is the correct set of quantum number for the outermost electron of potassium atom (Z = 19)?
A)
\[n\] \[l\] \[m\] \[s\] 4 3 2 -1/2
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B)
4 2 0 -1/2
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C)
4 1 0 +1/2
done
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D)
4 0 0 -1/2
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question_answer 113) The molecules present in 5.6 L of sulphur dioxide at STP is
A)
\[1.5\times {{10}^{23}}\]
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B)
\[1.5\times {{10}^{-23}}\]
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C)
\[4\times {{10}^{23}}\]
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D)
\[0.15\times {{10}^{23}}\]
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question_answer 114) What is the relationship between the parent and daughter nuclei, when a nucleus of an atom undergoes beta emission?
A)
Isobars
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B)
Isotopes
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C)
Isotones
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D)
Isomers
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question_answer 115) In photoelectric effect, the kinetic energy of the photoelectron increases linearly with the
A)
wavelength of the incident light
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B)
frequency of the incident light
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C)
velocity of the incident light
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D)
atomic mass of an element
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question_answer 116) Dual behaviour of matter was proposed by
A)
Niels Bohr
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B)
Erwin Schrodinger
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C)
Louis de-Broglie
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D)
Max Planck
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question_answer 117) What is the maximum number of emission lines obtained when the excited electron of a hydrogen atom in\[n=5\]drops to the ground state?
A)
10
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B)
5
done
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C)
12
done
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D)
15
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question_answer 118) For a reaction\[[R]\xrightarrow[{}]{{}}P\]a graph of [R] against time is found to be a straight line. What is the order of this reaction?
A)
Second order
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B)
Third order
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C)
First order
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D)
Zero order
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question_answer 119) For getting accurate value of molar mass of a solute by osmotic pressure measurement
A)
the solute must be volatile
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B)
the Solution concentration must be high
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C)
the solute should undergo dissociation
done
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D)
the solute must be non-volatile
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question_answer 120) In a catalytic experiment involving the Haber process,\[{{N}_{2}}(g)+3{{H}_{2}}(g)\xrightarrow{{}}2N{{H}_{3}}(g),\]the rate of reaction was measured as Rate =\[[N{{H}_{3}}]=2.0\times {{10}^{-4}}M{{s}^{-1}}\] If there were no side reactions what was the rate of reaction expressed in terms of\[{{N}_{2}}\]?
A)
\[1\times {{10}^{-4}}M{{s}^{-1}}\]
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B)
\[4\times {{10}^{-4}}M{{s}^{-1}}\]
done
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C)
\[5\times {{10}^{-3}}M{{s}^{-1}}\]
done
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D)
\[1\times {{10}^{-3}}M{{s}^{-1}}\]
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question_answer 121) For a dilute solution, Raoults law states that
A)
lowering of vapour pressure is equal to the mole fraction of the solute
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B)
relative lowering of vapour pressure is equal to the mole fraction of the solvent
done
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C)
relative lowering of vapour pressure of the solvent is equal to the mole fraction of the solute
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D)
vapour pressure of the solution is equal to the vapour pressure of the solvent
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question_answer 122) 36 g of glucose (molar mass = 180 g/mol) is present in 500 g of water, the molality of the solution is
A)
0.2
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B)
0.4
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C)
0.8
done
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D)
1.0
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question_answer 123) A certain current liberates 0.504 g hydrogen in 2 h. How many gram of oxygen can be liberated by the same current in the same time?
A)
2.0 g
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B)
0.4 g
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C)
4.0 g
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D)
8.0 g
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question_answer 124) The reduction potential values of X, Y and Z are \[-\text{ }3.05\text{ }V,~~-\text{ }0.44\text{ }V\]and\[-\text{ }0.83\text{ }V\]respectively. Which of the following order is correct with respect to their reducing property?
A)
\[X\text{ }>\text{ }Y\text{ }>\text{ }Z\]
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B)
\[X\text{ }>\text{ }Z\text{ }>\text{ }Y\]
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C)
\[Y\text{ }>\text{ }Z\text{ }>\text{ }X\]
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D)
\[Z\text{ }>\text{ }Y\text{ }>\text{ }X\]
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question_answer 125) Relationship between atomic radius r and the edge length a of a body centred cubic unit cell is
A)
\[r=\frac{a}{2}\]
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B)
\[r=\sqrt{\frac{a}{2}}\]
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C)
\[r=\frac{\sqrt{3}}{4}a\]
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D)
\[r=\frac{3a}{2}\]
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question_answer 126) Calculate the reduction potential of a half-cell containing of platinum electrode immersed in \[2.0\text{ }M\text{ }F{{e}^{2+}}\]and\[0.02\text{ }M\text{ }F{{e}^{3+}}\]. Given \[E_{F{{e}^{3+}}/F{{e}^{2+}}}^{o}=0.771V,\] \[F{{e}^{3+}}+{{e}^{-}}\xrightarrow[{}]{{}}F{{e}^{2+}}\]
A)
0.653V
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B)
0.889V
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C)
0.0653V
done
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D)
2.771V
done
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question_answer 127) Faraday constant is defined as
A)
charge carried by one electron
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B)
charge carried by one mole of electron
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C)
charge required depositing one mole of substance
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D)
charge carried by two moles of electron
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question_answer 128) If 300 mL of a gas weighs 0.368 g at STP. What is its molecular weight?
A)
30.16
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B)
2.55
done
clear
C)
27.5
done
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D)
37.5
done
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question_answer 129) Which one of the following compound exhibit both Schottky and Frenkel defects?
A)
\[NaCl\]
done
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B)
\[AgCl\]
done
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C)
\[AgBr\]
done
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D)
\[AgI\]
done
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question_answer 130) Identify the molecule that has zero dipole moment.
A)
\[C{{H}_{3}}Cl\]
done
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B)
\[CHC{{l}_{3}}\]
done
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C)
\[C{{H}_{2}}C{{l}_{2}}\]
done
clear
D)
\[CC{{l}_{4}}\]
done
clear
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question_answer 131) Which one statement about sulphur dioxide gas is incorrect?
A)
It has an angular shape
done
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B)
It decolourises acidified potassium permanganate solution
done
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C)
Two \[S-O\] bonds are equal
done
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D)
It is a dehydrating agent
done
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View Answer play_arrow
question_answer 132) In which of the following arrangement, the order is not according to the property indicated against it?
A)
\[{{F}_{2}}>C{{l}_{2}}>B{{r}_{2}}>{{I}_{2}}-\] Oxidising agent
done
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B)
\[N{{H}_{3}}>P{{H}_{3}}>As{{H}_{3}}>Sb{{H}_{3}}>Bi{{H}_{3}}\]Basic property
done
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C)
\[F>Cl>Br>I\]Electron gain enthalpy
done
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D)
\[C>Si>Ge>Sn\]Ability to formp-p bond
done
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View Answer play_arrow
question_answer 133) In\[C{{O}_{2}},C{{H}_{4}}\]and\[CH_{3}^{+}\]the hybridisation of carbon atom are
A)
\[s{{p}^{2}},\text{ }s{{p}^{3}}\]and\[s{{p}^{2}}\]respectively
done
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B)
\[sp,\text{ }s{{p}^{3}}\]and\[s{{p}^{2}}\]respectively
done
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C)
\[sp,\text{ }s{{p}^{3}}\]and\[sp\]respectively
done
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D)
\[s{{p}^{2}},\text{ }s{{p}^{3}}\]and\[sp\]respectively
done
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View Answer play_arrow
question_answer 134) Why calcium ion makes water hard but sodium ion does not?
A)
Calcium forms insoluble compound with stearate ion present in soap
done
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B)
Sodium forms insoluble compound with stearate ion present in soap
done
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C)
Calcium forms soluble compound with stearate ion present in soap
done
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D)
Both calcium and sodium forms insoluble compound with stearate ion present in soap
done
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View Answer play_arrow
question_answer 135) The colorless gas that turns brown in air is
A)
\[NO\]
done
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B)
\[N{{O}_{2}}\]
done
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C)
\[{{N}_{2}}{{O}_{4}}\]
done
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D)
\[{{N}_{2}}{{O}_{5}}\]
done
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View Answer play_arrow
question_answer 136) IUPAC name of the complex\[{{K}_{3}}[Al{{({{C}_{2}}{{O}_{4}})}_{3}}]\]is
A)
potassium tris(oxalato)aluminate\[(III)\]
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B)
potassium tri(oxalato)aluminate\[(III)\]
done
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C)
potassium tris(oxalato) aluminium\[(III)\]
done
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D)
potassium tri(oxalato) aluminium\[(III)\]
done
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View Answer play_arrow
question_answer 137) The depressant used to separate lead sulphide and zinc sulphide ores is
A)
potassium cyanide
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B)
sodium cyanide
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C)
silver cyanide
done
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D)
sodium sulphide
done
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View Answer play_arrow
question_answer 138)
IUPAC name of the compound
A)
1 -fluoro-4-methyl-2-nitrobenzene
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B)
4-fluoro-1-methyl-3-nitrobenzene
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C)
4-methyl-1 -fluoro-2-nitrobenzene
done
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D)
5-methyl-2-fluoro-1 -nitrobenzene
done
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question_answer 139) In the extraction of copper, the copper matte is a mixture of
A)
copper(II) sulphide and iron(II) sulphide
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B)
copper (II) sulphide and iron (III) sulphide
done
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C)
copper (I) sulphide and iron (II) sulphide
done
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D)
copper(I) sulphide and iron(III) sulphide
done
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View Answer play_arrow
question_answer 140) Silver halide which is readily soluble in ammonium chloride is
A)
silver chloride
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B)
silver bromide
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C)
silver fluoride
done
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D)
silver iodide
done
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question_answer 141) Which of the following reagent can be used to convert ethanamide to methanamine?
A)
\[{{P}_{2}}{{O}_{5}}\]
done
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B)
\[NaOBr\]
done
clear
C)
\[LiAl{{H}_{4}}/{{H}_{2}}O\]
done
clear
D)
\[Na(Hg)/{{C}_{2}}{{H}_{5}}OH\]
done
clear
View Answer play_arrow
question_answer 142) Identify the product C in the series \[{{C}_{6}}{{H}_{5}}N{{O}_{2}}\xrightarrow[{}]{Fe/HCl}A\xrightarrow[273\,K]{NaN{{O}_{2}}+HCl}\]\[B\xrightarrow[283\,K]{{{H}_{2}}O}C\]
A)
\[{{C}_{2}}{{H}_{5}}OH\]
done
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B)
\[{{C}_{6}}{{H}_{5}}C{{H}_{2}}OH\]
done
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C)
\[{{C}_{6}}{{H}_{5}}CHO\]
done
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D)
\[{{C}_{6}}{{H}_{5}}N{{H}_{2}}\]
done
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View Answer play_arrow
question_answer 143) The class of drug used for the treatment of stress is
A)
analgesics
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B)
antiseptic
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C)
antihistamine
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D)
tranquilizers
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View Answer play_arrow
question_answer 144) Compound that has smell of bitter almonds is
A)
aniline
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B)
benzonitrile
done
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C)
phenyl isocyanide
done
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D)
nitrobenzene
done
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View Answer play_arrow
question_answer 145) Which of the following is the correct increasing order of basicity of amines in gaseous phase?
A)
\[{{(CH{{ }_{3}})}_{2}}NH>C{{H}_{3}}N{{H}_{2}}>{{(C{{H}_{3}})}_{3}}N>N{{H}_{3}}\]
done
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B)
\[{{(C{{H}_{3}})}_{3}}N>{{(C{{H}_{3}})}_{2}}NH>C{{H}_{3}}N{{H}_{2}}>N{{H}_{3}}\]
done
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C)
\[{{(C{{H}_{3}})}_{2}}NH>{{(C{{H}_{3}})}_{3}}N>C{{H}_{3}}N{{H}_{2}}>N{{H}_{3}}\]
done
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D)
\[{{(C{{H}_{3}})}_{3}}N>C{{H}_{3}}N{{H}_{2}}>{{(C{{H}_{3}})}_{2}}NH>N{{H}_{3}}\]
done
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View Answer play_arrow
question_answer 146) Nitrogenous base that found in RNA but absent in DNA is
A)
uracil
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B)
thymine
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C)
cytosine
done
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D)
adenine
done
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View Answer play_arrow
question_answer 147) Glycerol when reacts with potassium hydrogen sulphate at 473 K - 503 K forms
A)
allyl iodide
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B)
allyl alcohol
done
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C)
glyceric acid
done
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D)
acrolein
done
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View Answer play_arrow
question_answer 148) Phenol reacts with bromine in chloroform at low temperature to give
A)
m-bromophenol
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B)
mixture of ortho and para bromophenol
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C)
p-bromophenol
done
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D)
2,4,6-tribromophenol
done
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View Answer play_arrow
question_answer 149)
Identify the compound X in the following reaction
A)
done
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B)
done
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C)
done
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D)
done
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View Answer play_arrow
question_answer 150) Alkyl halides undergoing substitution nucleophilic bimolecular reaction involves
A)
formation of carbocation
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B)
racemic mixture
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C)
inversion of configuration
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D)
retention of configuration
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View Answer play_arrow
question_answer 151) The meristem that is parallel to the longitudinal axis of the plant is
A)
Procambium
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B)
intercalary meristem
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C)
phellogen
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D)
apical meristem
done
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View Answer play_arrow
question_answer 152) Spadix type of inflorescence is seen in
A)
banana
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B)
mulberry
done
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C)
oak
done
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D)
coriander
done
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question_answer 153) Incomplete dominance is demonstrated in
A)
Antirrhinum majus
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B)
Pi sum sativum
done
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C)
Hibiscus rosa sinensis
done
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D)
Abutilon ind icum
done
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question_answer 154) Which one of the following is a modified stem that performs photosynthesis?
A)
Tendrils
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B)
Bulbils
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C)
Phylloclades
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D)
Prickles
done
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question_answer 155) Rat poison is obtained from
A)
Urginea
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B)
Lilium
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C)
Asparagus
done
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D)
Aloe vera
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question_answer 156) Many phenotypic characters are controlled by
A)
pleiotropic gene
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B)
polygenes
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C)
hypostatic gene
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D)
epistatic gene
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question_answer 157) The hormone responsible for apical dominance is
A)
auxin
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B)
gibberellins
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C)
cytokinin
done
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D)
ethylene
done
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question_answer 158) The movement of water from higher water potential to lower water potential through a semi-permeable membrane is called
A)
osmosis
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B)
diffusion
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C)
plasmolysis
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D)
imbibitions
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question_answer 159) Seeds of winter varieties are benefited by this method.
A)
Senescence
done
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B)
Abscission
done
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C)
Photoperiodism
done
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D)
Vernalisation
done
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View Answer play_arrow
question_answer 160) The example for seismonasty is
A)
Mimosa pudica
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B)
Samanea saman
done
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C)
Albizia lebbek
done
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D)
Hibiscus rosa sinensis
done
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View Answer play_arrow
question_answer 161) In plants, chlorosis is caused by the deficiency of
A)
nitrogen
done
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B)
manganese
done
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C)
magnesium
done
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D)
All of these
done
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View Answer play_arrow
question_answer 162) In \[{{C}_{3}}-\]plants, photosynthesis occurs in
A)
bundle sheath cells
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B)
peroxisome
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C)
mesophyll cells
done
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D)
Kranz anatomy
done
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View Answer play_arrow
question_answer 163) Which one of the following is a bacterial biofertilizer?
A)
Anabaena
done
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B)
Nostoc
done
clear
C)
Rhizobium
done
clear
D)
Oscillatoria
done
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View Answer play_arrow
question_answer 164) Production of superior \[{{F}_{L}}\]hybrids is called
A)
inbreeding
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B)
domestication
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C)
emasculation
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D)
heterosis
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question_answer 165) The illegal and unlawful development of biomaterials without payment to the inhabitants of their origin is called
A)
biopatent
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B)
biotechnology
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C)
bio-war
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D)
biopiracy
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question_answer 166) The infectious and contagious bacterial disease that affects cattle, buffaloes, horses, sheeps and goats, is
A)
anthrax
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B)
rinderpest
done
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C)
tick fever
done
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D)
necrosis
done
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View Answer play_arrow
question_answer 167) The most abundant greenhouse gas is
A)
\[C{{O}_{2}}\]
done
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B)
\[N{{O}_{2}}\]
done
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C)
\[S{{O}_{2}}\]
done
clear
D)
\[{{O}_{3}}\]
done
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View Answer play_arrow
question_answer 168) Pouch is seen in
A)
platypus
done
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B)
bat
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C)
lemur
done
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D)
marsupials
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View Answer play_arrow
question_answer 169) The truly land animals are
A)
newts
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B)
lung-fishes
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C)
salamanders
done
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D)
Calotes
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question_answer 170) Marasmus is caused by the deficiency of
A)
protein
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B)
thiamin
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C)
riboflavin
done
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D)
niacin
done
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question_answer 171) Which one of the following is not a flightless bird?
A)
Struthio
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B)
Emu
done
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C)
Psittacula
done
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D)
Cassowary
done
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question_answer 172) The process of conversion of excess glucose into glycogen is called
A)
glycolysis
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B)
glycogenesis
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C)
gluconeogenesis
done
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D)
oogenesis
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question_answer 173) The volume of air that is normally inspired and expired at every breath is called
A)
residual volume
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B)
inspiratory reserve volume
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C)
vital capacity
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D)
tidal volume
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question_answer 174) The branch of biology that deals with the study of the process of ageing is
A)
gynaecology
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B)
senescence
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C)
gerontology
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D)
palaeontology
done
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question_answer 175) The double helix model of DNA was proposed by
A)
Griffith
done
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B)
Stinberg
done
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C)
Watson and Crick
done
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D)
Wilkins
done
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question_answer 176) Clover leaf model of tRNA was suggested by
A)
Went
done
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B)
Flemming
done
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C)
Holley
done
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D)
Messelson
done
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question_answer 177) Fluid mosaic model of plasma membrane was proposed by
A)
Watson and Crick
done
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B)
Alfonso Corti
done
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C)
Robert Hooke
done
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D)
Singer and Nicholson
done
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question_answer 178) The width of DNA molecule is
A)
\[10\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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B)
\[20\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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C)
\[34\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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D)
\[35\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
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View Answer play_arrow
question_answer 179) Okazaki fragments are linked by
A)
ligase
done
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B)
primase
done
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C)
topoisomerase
done
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D)
DNA polymerase
done
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View Answer play_arrow
question_answer 180) rnRNA carries the genetic information from DNA to the
A)
chloroplasts
done
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B)
ribosomes
done
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C)
mitochondria
done
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D)
lysosomes
done
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question_answer 181) Humans belong to the family
A)
Hominidae
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B)
Pongidae
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C)
Hylobatidae
done
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D)
Ramapithecus
done
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question_answer 182) Which one of the following is not an autoimmune disease?
A)
Graves disease
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B)
Pernicious anaemia
done
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C)
Rheumatoid arthritis
done
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D)
Insomnia
done
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question_answer 183) In which type of isolation, two species living in different habitats are prevented from interbreeding?
A)
Temporal
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B)
Ecological
done
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C)
Behavioural
done
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D)
Gametic
done
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question_answer 184) The branch of biology that deals with the study of fossil is
A)
anatomy
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B)
embryology
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C)
morphology
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D)
palaeontology
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question_answer 185) Vaccine against rabies was first developed by
A)
Edward Jenner
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B)
George Snell
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C)
Louis Pasteur
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D)
Peter Goror
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question_answer 186) The binomial system of nomenclature was first used by
A)
Caspary
done
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B)
Carolus Linnaeus
done
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C)
Camp and Gilly
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D)
Gaspard Bauhin
done
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question_answer 187) The pesticide that is used in the preparation of herbarium is
A)
2,4-dichlorophenoxy acetic acid
done
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B)
NAA
done
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C)
mercuric chloride
done
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D)
carbon disulphide
done
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question_answer 188) A group of individuals, which are able to breed among themselves and produce their own kind, is known as
A)
genus
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B)
species
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C)
family
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D)
order
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question_answer 189) The term biosystematics was coined by
A)
Gaspard Bauhin
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B)
Camp and Gilly
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C)
Karl Prantl
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D)
Robert Brown
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question_answer 190) The five kingdom system of classification was proposed by
A)
R H Whittaker
done
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B)
Linnaeus
done
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C)
Bentham and Hooker
done
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D)
G Simpson
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question_answer 191) Which of the following is considered as neither prokaryotes nor eukaryotes?
A)
Bacteriophages
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B)
Bacteria
done
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C)
Monera
done
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D)
Fungi
done
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question_answer 192) Vegetative propagation by leaves is seen in
A)
Murraya sp.
done
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B)
Bryophyllum daigremontianum
done
clear
C)
Albizia lebbek
done
clear
D)
Dalbergia sissoo
done
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question_answer 193) Pollination caused by wind is called
A)
hydrophily
done
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B)
entomophily
done
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C)
anemophily
done
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D)
ornithophily
done
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question_answer 194) Closure of stomata is caused by
A)
auxin
done
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B)
ethylene
done
clear
C)
cytokinin
done
clear
D)
abscisic acid
done
clear
View Answer play_arrow
question_answer 195) When pollens from one flower are deposited on the stigma of another flower born on the same plant, the type of pollination is known as
A)
allogamy
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B)
geitonogamy
done
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C)
xenogamy
done
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D)
autogamy
done
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View Answer play_arrow
question_answer 196) Falling of floral parts, leaves and fruits from the mother plant is called
A)
senescence
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B)
abscission
done
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C)
photoperiodism
done
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D)
vernalisation
done
clear
View Answer play_arrow
question_answer 197) The example of symbiotic bacterium is
A)
Nitrosococcus
done
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B)
Nitrobacter
done
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C)
Rhizobium
done
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D)
cyanobacteria
done
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question_answer 198) Parasitic phanerogams absorb water and solutes from the host plant by
A)
mycorrhizal roots
done
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B)
clinging roots
done
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C)
haustoria
done
clear
D)
adventitious roots
done
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View Answer play_arrow
question_answer 199) Photorespiration is otherwise called as
A)
\[{{C}_{2}}-\]cycle
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B)
\[{{C}_{3}}-\]cycle
done
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C)
\[{{C}_{4}}-\]cycle
done
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D)
\[{{C}_{5}}-\]cycle
done
clear
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question_answer 200) Which one of the following is not an insectivorous plant?
A)
Monotropa
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B)
Drosera
done
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C)
Utricularia
done
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D)
Nepenthes
done
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question_answer 201) During cyclic electron transport, which one of the following is produced?
A)
ATP only
done
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B)
Erythrose
done
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C)
\[NAD{{H}_{2}}\]
done
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D)
None of these
done
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View Answer play_arrow
question_answer 202) \[C{{O}_{2}}\] acceptor in \[{{C}_{4}}-\]plant is
A)
RuBP (Ribulose Biphosphate)
done
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B)
PEP (Phosphoenol pyruvate)
done
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C)
Oxaloacetic acid
done
clear
D)
3-PGA (3-Phosphoglyceric acid)
done
clear
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question_answer 203) Which one of the following is called as indicator species for polluted waters?
A)
Tubifex
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B)
Phytoplanktons
done
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C)
Zooplanktons
done
clear
D)
Prawns
done
clear
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question_answer 204) The intermediate zone lying between two adjacent communities is called
A)
edge effect
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B)
keystone
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C)
succession
done
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D)
ecotone
done
clear
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question_answer 205) The body of the animal can be divided into identical halves in only one plane is
A)
asymmetry
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B)
bilateral symmetry
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C)
radial symmetry
done
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D)
biradial symmetry
done
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question_answer 206) The number of individuals at the trophic level decreases from the producer level to the consumer level in the
A)
pyramid of numbers
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B)
pyramid of biomass
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C)
pyramid of energy
done
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D)
None of the above
done
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question_answer 207) The space between body wall and alimentary canal lined by mesoderm is called
A)
acoelom
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B)
pseudocoelom
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C)
coelom
done
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D)
None of these
done
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question_answer 208) Spicules are found in
A)
Hydra
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B)
Planaria
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C)
Sycon
done
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D)
Obelia
done
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question_answer 209) The system in which the veins begin as capillaries in one organ and breaks up into capillaries in different organ is called
A)
portal system
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B)
pulmonary circulation
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C)
systemic circulation
done
clear
D)
cardiac capillaries
done
clear
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question_answer 210) The nitrogenous excretory products are formed from the catabolism of amino acids by
A)
Calvin cycle
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B)
nitrogen cycle
done
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C)
ornithine cycle
done
clear
D)
Krebs cycle
done
clear
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question_answer 211) Excessive development of male mammary glands is called
A)
eunuchoidism
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B)
male hypogonadism
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C)
gynaecomastia
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D)
female hypogonadism
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question_answer 212) The wall of the stomach is protected against the action of HCl by
A)
epidermal layer
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B)
mesodermal layer
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C)
mucous layer
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D)
muscular layer
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question_answer 213) The volume of urine to be excreted from kidneys is well regulated by a hormone called
A)
TSH
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B)
ACTH
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C)
FSH
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D)
ADH
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question_answer 214) The ankle, knee and elbow joints are
A)
synovial joints
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B)
hinge joints
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C)
pivot joints
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D)
ellipsoid joints
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question_answer 215) The method used to detect tissue pathology or any blockages in the blood vessel surrounding the heart is
A)
digital subtraction angiography
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B)
magnetic resonance imaging
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C)
CT scan
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D)
electroencephalography
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question_answer 216) Graft between individuals of different species is called
A)
xenograft
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B)
isograft
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C)
autograft
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D)
allograft
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question_answer 217) In the liver, alcohol is converted into a more toxic substance called
A)
acetaldehyde
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B)
formaldehyde
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C)
hydrogen cyanide
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D)
methane
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question_answer 218) The blood cancer is
A)
melanoma
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B)
sarcoma
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C)
carcinoma
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D)
leukaemia
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question_answer 219) Which one of the following is a stimulant?
A)
Barbiturates
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B)
Cocaine
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C)
Marijuana
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D)
Anti-histamines
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question_answer 220) Pairing or synapsis between homologous chromosome occur during
A)
leptotene
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B)
pachytene
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C)
zygotene
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D)
diplotene
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question_answer 221) Species occupying different geographical areas are termed as
A)
sympatric species
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B)
sibling species
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C)
llopatric species
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D)
endangered species
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question_answer 222) Organs that perform the same function but are not similar in structural details and origin are called
A)
analogous organs
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B)
homologous organs
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C)
vestigial organs
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D)
None of the above
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question_answer 223) The suicidal bags of the cell are
A)
lysosomes
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B)
ribosomes
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C)
dictyosomes
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D)
phagosomes
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question_answer 224) The monohybrid test cross ratio is
A)
1 : 1
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B)
1 : 1 : 1 : 1
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C)
9 : 3 : 3 : 1
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D)
9 : 3 : 4
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question_answer 225) Oparin-Haldanes view on the origin of life was first experimentally recognised by
A)
Malthus
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B)
Plato
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C)
Louis Pasteur
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D)
Stanley L Miller
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