If `p^(@)` and `p_(a)` are the vapour pressures of the solvent and solution respectively and `n_(1)` and `n_(2)` are the mole fractions of solvent and solute respectively. Then,

Options

A. `P^(0)=P[(n_(1))/(n_(1)+n_(2))]`
B. `P^(0)=P[(n_(2))/(n_(1)+n_(2))]`
C. `P=P^(0)[(n_(2))/(n_(1)+n_(2))]`
D. `P=P^(0)[(n_(1))/(n_(1)+n_(2))]`

Answer

C

Explanation

`(P^(0)-P)/(P^(0))=(n_(1))/(n_(1)+n_(2))or1-(P)/(P^(0))=(n_(1))/(n_(1)+n_(2))or`
`(P)/(P^(0))=1-(n_(1))/(n_(1)+n_(2))or(P)/(P^(0))=(n_(2))/(n_(1)+n_(2))or`
`P=P_(0)[(n_(2))/(n_(1)+n_(2))]`.