Q 11-12-064JEE MainJEE Main 2023 (30 Jan, Shift 2)Easy
A flask contains hydrogen and oxygen in the ratio of $2:1$ by mass at temperature $27^\circ\text{C}$. The ratio of average kinetic energy per molecule of hydrogen and oxygen respectively is
Answer: (B) $1:1$
Average translational KE per molecule is $\tfrac32kT$, which depends only on temperature. Both gases are at the same temperature, so the ratio is $1:1$.
Solution by Sreeraj P, M.Sc Physics