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One mole of non-volatile solute is disso...

One mole of non-volatile solute is dissolved in two mole of water. The vapour pressure of the solution relative to that of water is:

A

(a) `2//3`

B

(b) `1//3`

C

( c) `1//2`

D

(d) `3//2`

Text Solution

Verified by Experts

The correct Answer is:
A
`(P^(@)-P_(S))/(P^(@)) = (1)/(1+2) = (1)/(3)`
`:. 1- (P_(S))/(P^(@)) = (1)/(3)`

Thus
`(P_(S))/(P^(@)) = 1 - (1)/(3) = (2)/(3)`

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