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_(s) = p^(@) n_(1)`
B. `p_(s) = p_(@)n_(2)`
C. `p^(@) = p_(s)n_(2)`
D. `p_(s) = p^(@)(n_(1))/(n_(2))`

Answer

a

Explanation

Raoult's law `(p_(0) - p_(s))/(p_(0) = n_(2)`
`1 - (p_(2))/(p_(0)) = n_(2)`
`(p_(s))/(p_(0)) = 1 - n_(2) = n_(1)`
`p_(s) = n_(1)xxp_(0)`