A flask contains Hydrogen and Argon in the ratio 2 : 1 by mass. The temperature of the mixture is 30 °C. The ratio of average kinetic energy per molecule of the two gases 
is: (Given : Atomic Weight of Ar = 39.9)
A
2
B
1
C
39 9
D
Text Solution
Verified by ExpertsThe correct answer is:
B
The formula to calculate the average kinetic energy per molecule of a gas at any temperature T is given by
where, 
is Boltzmann constant.
From above equation, it can be concluded that the average kinetic energy per molecule is independent of the molecular weight of the gas.
Hence, the required ratio is 1 : 1.
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