If the vapour densities of methane \& oxygen are in the ratio \( 1: 2 \), the ratio of rate of (...

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If the vapour densities of methane \& oxygen are in the ratio \( 1: 2 \), the ratio of rate of
(W) diffusion of \( \mathrm{O}_{2} \& \mathrm{CH}_{4} \) is respectively
(1) \( 1: 2 \)
(2) \( 1: 1.414 \)
(3) \( 2: 1 \)
(4) \( 1.414: 1 \)
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