If the density of a gas `A` is `1.5` times that of `B`, then the molecular mass of `A` is `M`. The molecular mass of `B` will be

Options

A. `1.5 M`
B. `M//1.5`
C. `3 M`
D. `M//3`

Answer

B

Explanation

`PV = nRT " or " P = (n)/(V) RT = (dRT)/(M)`
`(d_(A))/(M_(A)) = (d_(B))/(M_(B)) " or " (1.5)/(1) = (M)/(M_(B)) " or " M_(B) = M//1.5`