Problem 11
Which is not true in case of an ideal gas? (a) It cannot be converted into a liquid. (b) There is no interaction between the molecules. (c) All molecules of the gas move with same speed. (d) At a given temperature, \(P V\) is proportional to the amount of the gas.
Problem 12
A gas is said to behave like an ideal gas when the relation \(P V / T=\) constant. When do you expect a real gas to behave like an ideal gas? (a) When the temperature is low (b) When both the temperature and pressure are low (c) When both the temperature and pressure are high (d) When the temperature is high and pressure is low
Problem 13
The gas which can be liquefied under high pressure and \(40^{\circ} \mathrm{C}\) is (a) nitrogen (b) hydrogen (c) oxygen (d) ammonia
Problem 14
Which set of conditions represent easiest way to liquefy a gas? (a) Low temperature and high pressure (b) High temperature and low pressure (c) Low temperature and low pressure (d) High temperature and high pressure
Problem 15
Gases deviate from the ideal gas behaviour because their molecules (a) possess negligible volume (b) have forces of attraction between them (c) are polyatomic (d) are not attracted to one another
Problem 16
An ideal gas, obeying kinetic theory of gases, can be liquefied: (a) It cannot be liquefied at any \(P\) and \(T\) (b) Its pressure is more than \(P\) at a temperature less than \(T\) (c) Its temperature is more than critical temperature \(T\) (d) Its pressure is more than critical pressure \(P\)
Problem 19
Critical temperature means above this temperature at any pressure, any gas can be (a) liquefied (b) not liquefied (c) both statements are correct (d) Solified
Problem 20
According to the van der Waals correction to get the pressure of ideal gas in observed pressure a definite fraction for correction is (a) subtracted (b) added (c) divided (d) unchanged
