The spherical shape of rain droplets is due to-
1. Viscosity
2. surface tension
3. Critical phenomenon
4. Pressure
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.
With increase in temperature the surface tension of a liquid will:
1. Remains same
2. Decreases
3. Increases
4. No regular pattern is followed
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
Among water, ether, and acetone, water has the maximum boiling point and ether has the minimum boiling point. The correct order of vapour pressure of water, acetone and ether at is-
1. Water<ether<acetone
2. Water<acetone<ether
3. Ether<acetone<water
4. Acetone<ether<water
The SI unit of viscosity coefficient is-
1. Pascal
2. Nsm-2
3. km-2s
4. Nm-2
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
As per Charles's law ,–273° C is the lowest possible temperature because:
1. | All gases get liquefied before reaching a temperature of – 273° C. |
2. | All gases get liquefied after reaching a temperature of – 273° C. |
3. | All gases have a critical temperature of –273° C. |
4. | None of the Above. |
Maximum deviation from ideal gas is shown by-
1. H2(g)
2. N2(g)
3. CH4(g)
4. NH3(g)
The correct statement regarding the van der Waal constant of N2 & NH3 is -
1.
2.
3.
4.