At the same temperature and pressure,which of the following gases has the highest kinetic energy $(K.E.)$ per mole?

What is the temperature at which the kinetic energy of $0.3 \ mol$ of helium is equal to the kinetic energy of $0.4 \ mol$ of argon at $400 \ K$ (in $K$)?

Which among the following statements is correct?
$A$. There is a complete order of molecules in gases.
$B$. There is a complete disorder of molecules in gases.
$C$. Molecules are not always in random motion in gases.
$D$. Molecules are fixed at respective position in gases.

At the same temperature and pressure,which of the following gases has the highest kinetic energy per mole?

If the four tubes of a car are filled to the same pressure with $N_2$,$O_2$,$H_2$ and $Ne$ separately,then which one will be filled first?

Which one of the following is the wrong assumption of the kinetic theory of gases?