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The ratio of vapour pressure over soluti...

The ratio of vapour pressure over solution phase on mixing two immiscibe liquids is equal to:

A

Ratio of their weight

B

Ratio of their mol.wt.

C

Ratio of their moles in vapours phase

D

Ratio of their moles in liquids phase

Text Solution

Verified by Experts

The correct Answer is:
C
`P'_(A) = P_(M) . X'_(A)` and `P'_(B) = P'_(M) . X'_(B)` where `X'_(A)` and `X'_(B)` are mole fraction in gaseous phase if two immiscible liquids are mixed.
`:. (P'_(A))/(P'_(B)) = (X'_(A))/(X'_(B)) = (n_(A))/(n_(B))` where `n_(A)` and `n_(B)` are moles in gaseous phase.
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