States of Matter Questions

Which one of the following statements is NOT true about the effect of an increase in temperature on the distribution of molecular speeds in a gas?

As the temperature is raised from $20^{\circ }\text{C}$ to $40^{\circ }\text{C}$, the average kinetic energy of neon atoms changes by a factor of:

In the van der Waals equation of state for a gas, the constant '$b$ ' is a measure of:

If $10^{-4}{\text{dm}}^3$ of water is introduced into a $1.0{\text{dm}}^3$ flask to $300\text{K}$, how many moles of water are in the vapour phase when equilibrium is established?(Given: Vapour pressure of ${\text{H}}_2\text{O}$ at $300\text{K}$ is $3170\text{Pa}$; $R=8.314{\text{J K}}^{-1}{\text{mol}}^{-1}$)

a' and b' are van der Waals' constants for gases. Chlorine is more easily liquefied than ethane because:

The compressibility factor for a real gas at high pressure is: