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The vapour pressure of water at20^@Cis 1...

The vapour pressure of water at`20^@C`is `17.5mmHg`.if `18g`of glucose `(C_(6)H_(12)O_(6)`is added to `178.2g` of water at`20^@C`, the vapour pressure of the resulting solution will be,

A

`17.675 mm Hg`

B

`15.750 mm Hg`

C

`16. 500 mm Hg`

D

`17.325 mm Hg`

Text Solution

Verified by Experts

The correct Answer is:
D
`(P^(@)-P_(S))/(P_(S)) = (w xx M)/(m xx W)`
`(17.5 - P_(S))/(P_(S)) = (18 xx 18)/(180 xx 178.2)`
`(17.5-P_(S))/(P_(S)) = 0.01`
`P_(S) = 17.325 mm Hg`
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