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S34.2 g of cane sugar is dissolved in 18...

S34.2 g of cane sugar is dissolved in 180 g of water. The relative lowering of vapour pressure will be

A

`0.0099`

B

`1.1597`

C

`0.840`

D

`0.9901`

Text Solution

Verified by Experts

The correct Answer is:
A
`(p^(@)-p_(s))/(p^(@))=((w_(2))/(m_(2)))/(w_(1)/m_(1)+w_(2)/m_(2))`
`=((34.2)/(342))/(34.2/342+180/18)`
`=(0.1)/(10.1)=0.0099`
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