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

Answer

C

Explanation

According to Raoult.s law
`p= p^(@) x_("solute") or p = p^(@) [(n_(2))/(n_(1) + n_(2))]`