At constant volume and temperature conditions, the rates of diffusion `r_(A)` and `r_(B)` of gases A and B having densities `P_(A)` and `P_(B)` are related by the expression :

Options

A. `r_(A)=r_(B).(p_(A)//p_(B))^(2)`
B. `r_(A)=r_(B)(p_(A)//p_(B))^(1//2)`
C. `r_(A)=(r_(B).p_(A)//p_(B))^(1//2)`
D. `r_(A)=r_(B)(p_(B)//p_(A))^(1//2)`

Answer

b

Explanation

(b) According to Grahm's law
`rprop(1)/(sqrt(d)), " "(r_(1))/(r_(2))=sqrt((d_(2))/(d_(1)))` at constant P and T