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.

The correct plot of the Maxwell-Boltzmann distribution at different temperatures $(T)$ is:

According to the kinetic theory of gases,which of the following statements are correct?
$A$. Collisions are always elastic.
$B$. Heavier molecules transfer more momentum to the wall of the container.
$C$. Only a small number of molecules have very high velocity.
$D$. Between collisions,the molecules move in straight lines with constant velocities.

According to the kinetic theory of gases,for a diatomic molecule:

Which of the following is an incorrect postulate of the kinetic molecular theory of gases?

Among the following,the plot that shows the correct marking of most probable velocity $(V_{mp})$,average velocity $(\bar{V})$,and root mean square velocity $(V_{rms})$ is