The interaction energy of London force is inversely proportional to sixth power of the distance between two interacting particles. Their magnitude depends upon-
1. Charge of interacting particles.
2. Mass of interacting particles.
3. Polarizability of interacting particles.
4. Strength of permanent dipoles in the particles.
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Dipole-dipole forces act between the molecules possessing permanent dipole. Ends of dipoles possess 'partial charges'.
The partial charge will be-
1. More than unit electronic charge.
2. Equal to unit electronic charge.
3. Less than unit electronic charge.
4. Double the unit electronic charge.
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The pressure of a 1 : 4 mixture of dihydrogen and dioxygen enclosed in a vessel is one atmosphere. The partial pressure of dioxygen is-
1.
2.
3.
4.
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As the temperature increases, average kinetic energy of molecules increases. With increase in temperature at constant volume, the pressure -
1. Increases
2. Decreases
3. Remains same
4. Becomes half
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Gases possess characteristic critical temperature which depends upon the magnitude of intermolecular forces between the particles. Following are the critical temperatures of some gases.
Gases | H2 | He | O2 | N2 |
The critical temperature in Kelvin | 33.2 | 5.3 | 154.3 | 126 |
From the above data, the order of liquefaction of the given gases is-
(write the order from the gas liquefying first)
1.
2.
3.
4.
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The SI unit of viscosity coefficient is-
1. Pascal
2. Nsm-2
3. km-2s
4. Nm-2
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Atmospheric pressure recorded in different cities are as follows
Cities | p in N/m2 |
Shimla | |
Bangalore | |
Delhi | |
Mumbai |
The liquid will boil first at -
1. Shimla
2. Bangalore
3. Delhi
4. Mumbai
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In the given figure, the curve representing an ideal gas is-
1. B only
2. C and D only
3. E and F only
4. A and B only
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Increase in kinetic energy can overcome intermolecular forces of attraction. How will increase in temperature effect the viscosity of liquid-
1. Increase
2. No effect
3. Decrease
4. No regular pattern will be followed
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With increase in temperature the surface tension of a liquid will:
1. Remains same
2. Decreases
3. Increases
4. No regular pattern is followed
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