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A binary solution of two liquid 'A' & 'B...

A binary solution of two liquid 'A' & 'B' is formed. Liquid 'B' is more volatile than liquid A. If external pressure over liquid mixture gradually decreases then:
A. Mole Fraction of `A` in liquid phase increases
B.Mole fraction of `B` in liquid phase increases
C. Mole fraction of `A` in liquid phase decreases.
D. Pressure fraction of B increases.

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