Question

Ratio of molecular weights of A and B is $\frac{4}{25}$ then ratio of rates of diffusion will be :
(a) 5 : 1
(b) 5 : 2
(c) 25 : 3
(d) 25 : 4

Answer 1

The answer is b.

Because rate of diffusion is inversely proportional to square root of Molecular mass.