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Q.

The vapour pressure of water at room temperature is 23.8 mm Hg. The vapour pressure of an aqueous solution of sucrose with mole fraction 0.1 is equal to :

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a

23.9 mm Hg

b

31.44 mm Hg

c

24.2 mm Hg

d

21.42 mm Hg

answer is C.

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Detailed Solution

Given, Po=23.8mm Hg ; P=? ; Xs=0.1

Po-PPo=Xs 23.8-P23.8=0.1 P=21.42

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