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The vapour pressure at a given temperatu...

The vapour pressure at a given temperature of an ideal solution containing `0.2 mol` of non-volatile solute and `0.8 mol` of a solvent is `60 mm` of `Hg`. The vapour pressure of the pure solvent at the same temperature will be

A

`120 mm Hg`

B

`150 mm Hg`

C

`60 mm Hg`

D

`75 mm Hg`

Text Solution

Verified by Experts

The correct Answer is:
D
`(P_(A)^(@)-60)/P^(@)=chi_(B) = 0.2 rArr P_(A)^(@)=75 mm Hg`
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