1.

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 :

Answer»

<P>0.867
0.133
0.902
0.568

Solution :`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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