When a mixture containing equal moles of (molar mass ) and (molar mass ) is allowed to effuse throug — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

Since $r_{He}/r_{CH_4} = \sqrt{16/4} = 2$, $He$ effuses twice as fast (A, D). Consequently, the effused gas has more $He$ than $CH_4$ (B), leaving the original mixture depleted of $He$, meaning its mole fraction inside decreases (C).