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6.0 g of urea (molecular mass = 60) was ...

6.0 g of urea (molecular mass = 60) was dissolved in 9.9 moles of water. If the vapour pressure of pure water is `P^(@)`, the vapour pressure of solution is :

A

`0.10 P^(@)`

B

`1.10P^(@)`

C

`0.90P^(@)`

D

`0.99P^(@)`

Text Solution

Verified by Experts

The correct Answer is:
4
`(P^(@)-P)/(P^(@))=X_("solute")`
or `" "(P^(@)-P)/(P^(@))=(n)/(n+N)" "rArr" "(0.1)/(0.1+9.9)rArr0.01,P=0.99P^(@)`
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