\( \mathbf{X} \) and \( \mathbf{Y} \) are two volatile liquids with...
0\( \mathbf{X} \) and \( \mathbf{Y} \) are two volatile liquids with molar weights of \( 10 \mathrm{~g} \mathrm{~mol}^{-1} \) and \( 40 \mathrm{~g} \mathrm{~mol}^{-1} \) respectively. Two cotton plugs, one soaked in \( \mathbf{X} \) and the other soaked in \( \mathbf{Y} \), are
P simultaneously placed at the ends of a tube of length \( \mathbf{L} \)
W \( =24 \mathrm{~cm} \), as shown in the figure. The tube is filled with an inert gas at 1 atmosphere pressure and a temperature of \( 300 \mathrm{~K} \). Vapours of \( \mathbf{X} \) and \( \mathbf{Y} \) react to form a product which is first observed at a distance \( \mathbf{d ~} \mathrm{cm} \) from the plug soaked in \( \mathbf{X} \). Take \( \mathbf{X} \) and \( \mathbf{Y} \) to have equal molecular diameters and assume ideal behaviour for the inert gas and the two vapours.
The experimental value of \( \mathbf{d} \) is found to be smaller than the estimate obtained using Graham's law. This is due to
[JEEAdvanced-2014]
(A) larger mean free path for \( \mathbf{X} \) as compared to that of Y
(B) larger mean free path for \( \mathbf{Y} \) as compared to that of \( \mathbf{X} \).
(C) increased collision frequency of \( \mathbf{Y} \) with the inert gas as compared to that of \( \mathbf{X} \) with the inert gas.
(D) increased collision frequency of \( \mathbf{X} \) with the inert gas as compared to that of \( \mathbf{Y} \) with the inert gas.
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