25. If
Po and P are the vapour pressure of the pure solvent and solution and n1 and n2 are the moles of solute and solvent respectively in the solution then the correct relation between P and Po is
a. Po = P [n1 / n1 + n2 ]
b. Po = P [ n2 / n1 +n2 ]
[ n2 / n1 +n2 ]
d. P = Po [ n1 / n1 +n2 ]
Ans. c
(13)