Question

According to Graham's law at a given temperature, the ratio of the rates of diffusion of gases $A$ and $B$ is given by :

(A) $\left(P_{A} / P_{B}\right)\left(M_{A} / M_{B}\right)^{1 / 2}$

(B) $\left(M_{A} / M_{B}\right)\left(P_{A} / P_{B}\right)^{1 / 2}$

(C) $\left(P_{A} / P_{B}\right)\left(M_{B} / M_{A}\right)^{1 / 2}$

(D) $\left(M_{A} / M_{B}\right)\left(P_{B} / P_{A}\right)^{1 / 2}$ (where $P$ and $M$ are the pressures and molecular weights of gases $A$ and $B$ respectively)

Answer 1

The ratio of the rates of diffusion of gases A and B is given by $\left(P_{A} / P_{B}\right)\left(M_{B} / M_{A}\right)^{1 / 2}$.

So, The correct option of this question is (C).