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The vapour pressure of a solvent is 60 t...

The vapour pressure of a solvent is 60 torr while that of its dilute solution is 52 torr. The mole fraction of the solvent is :

A

0.867

B

0.133

C

0.902

D

0.568

Text Solution

Verified by Experts

The correct Answer is:
A
`p^(@)=60` torr, `p_(s)=52` torr
`(p^(@)-p_(s))/(p^(@))=x`(solute)
`(60-52)/(60)=x` (solute)
or `x` (solute)`=0.133`
`x`(solvent)`=1-0.133=0.867`
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