According to Graham's law, at a given temperature, the ratio of the rates of diffusion `r_(A)//r_(B)` of gases `A` and `B` is given by

Answer

C

Explanation

`r prop p and prop (1)/(sqrtp) or prop (1)/(sqrtM)`
`therefore" "(r_(A))/(r_(B))=(p_(A))/(p_(B))((M_(B))/(M_(A)))^(1//2)`