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Two moles of a nonvolatile solute are di...

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

A

`2/5`

B

`2/7`

C

`4/7`

D

`5/7`

Text Solution

Verified by Experts

The correct Answer is:
D

`(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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