1.

If P^(oo) and P are the vapour pressures of the pure solvent and solution and n_(1) and n_2 are the moles of solute and solvent repectively in the soluiton then the correct relation betweenP and p^(@) is

Answer»

<P>`P^(@) = P[(n-1)/(n_1 + n_2)]`
`P^(@)=P[(n_2)/(n_1+n_2)]`
`P= P^(@)[(n_2)/(n_1 +n_2)]`
`P= P^(@)[(n_1)/(n_1+n_2)]`

Solution :We know ACCORDING to RAOULT .s law,
`P = P^(@) . X_("solute") rarr P = P^(@)[ (n_2)/(n_1 =n_2)]`


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