(a) The fraction of total number of molecules of a gas having most probable velocity increases with an increase in temperature of the gas
(b) The concentration of an ideal gas at 100 K and 0.0821 atm of pressure is $0.1 \times 10^{-2}$ mol. $lit^{-1}\;(R=0.0821 lit.atm. mol^{-1}.K^{-1})$
(c) If the rms velocity of an ideal gas at $T(K)$ is $'c'$am. $s^{-1},$ its rms velocity at $4T(K)$ is $'2C'\; cm.s^{-1}$
(d) The average kinetic energy of gas molecules is proportional to their absoluts temperature.
