Q 11-12-071JEE MainJEE Main 2023 (15 Apr, Shift 1)Easy
A flask contains Hydrogen and Argon in the ratio $2:1$ by mass. The temperature of the mixture is $30^\circ\text{C}$. The ratio of average kinetic energy per molecule of the two gases $\left(\dfrac{K_{argon}}{K_{hydrogen}}\right)$ is (Given: atomic weight of $Ar=39.9$)
Answer: (B) 1
The average (translational) kinetic energy per molecule is $\tfrac32kT$, the same for both gases at the same temperature. Ratio $=1$.
Solution by Sreeraj P, M.Sc Physics