1.

In very dilute solution the no. of moles of solvent are 10 time more than that of the solute. The V.P. of the solution would be (V.P. of pure solvent = 80mm)

Answer»

80mm
88mm
72mm
92mm

SOLUTION :As the solution is very dilute, addcording to RAOULT's law.
`(P_(1)^(0)-P)/P_(1)^(0)=n/N or 1-P/P_(1)^(0)=n/N`
`:. P=(1-n/N)P_(1)^(0)=(1-1/10)80=72mm`


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