Physics Question from JEE Main 2026 · 22 January, Shift 2

Consider two boxes containing ideal gases $A$ and $B$ such that their temperatures, pressures and number densities are same. The molecular size of $A$ is half of that of $B$ and mass of molecule $A$ is four times that of $B$. If the collision frequency in gas $B$ is $32\times10^8\,\text{s}^{-1}$, then collision frequency in gas $A$ is _____ $\text{s}^{-1}$.