The density of a gas a is twice that of gas B. Molecular mass of A is half of the molecular of B. The ratio of the partial pressures of A and B is :

Options

A. `1//4`
B. `1//2`
C. `4//1`
D. `2//1`

Answer

C

Explanation

`PV = nRT`
`P = (wRT)/(Mv) = (dRT)/(M)`
`(P_(A))/(P_(B)) = (d_(A))/(d_(B)) xx (M_(B))/(M_(A)) = 2/1 xx 2/1`
`= 4//1`