A) The coefficient of volume expansion at constant pressure is same for all ideal gas
B) The average translational kinetic energy per molecule of oxygen gas is 3KT (K being Boltzmann constant)
C) In a gaseous mixture, the average translational kinetic energy of the molecules of each component is same
D) The mean free path of molecules increases with decrease in pressure
Correct Answer: B
Solution :
Coefficient of volume expansion at constant pressure is \[\frac{1}{273}\] for all gases. The average transnational K.E. is same for molecules of all gases and for each molecules it is \[\frac{3}{2}\] kT. Mean free path \[\lambda =\frac{kT}{\sqrt{2}\,\pi {{d}^{2}}\,P}\] (as P decreases, \[\lambda \] increases)
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