1.

Two moles of a nonvolatile solute are dissolved in 5 moles of water. The vapour pressure of the solute relative to that of water is

Answer»

<P>`2/5`
`2/7`
`4/7`
`5/7`

SOLUTION :`(P_(o)-P_(s))/(P_(o))=(2)/(2+5)=2/7`
`1-(P_(s))/(P_(o))=2/7`
`(P_(s))/(P_(o))=1-2/7=5/7`


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