Which of the following represents the kinetic gas equation?

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.

If a gas expands at a constant temperature,then...

$A$ helium atom is two times heavier than a hydrogen molecule. At $298 \ K$,the average kinetic energy of helium is:

Two flasks $A$ and $B$ of equal volume contain equal masses of $H_2$ and $CH_4$ gases at $100 \ K$ and $200 \ K$ temperature respectively. Which of the following relations is correct about the total kinetic energy $(E)$?

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