The rates of diffusion of gases `A` and `B` of molecular mass `36` and `64` are in the ratio

Options

A. `9 : 16`
B. `4 : 3`
C. `3 : 4`
D. `16 : 9`

Answer

B

Explanation

Under the same conditions of `T` and `p`, the rates of diffusion for gaseous subtances are inversely proportional to the square roots of their molar masses:
`(r_(A))/(r_(B)) = sqrt((M_(B))/(M_(A))) = sqrt((64)/(36)) = (8)/(6) = (4)/(3)`