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The vapour pressure of a pure liquid A i...

The vapour pressure of a pure liquid A is 40 mm of Hg at 310K. The vapour pressure of its liquid in a solution with liquid B is 32 mm of Hg. Mole fraction of A in the solution, if it obeys Raoult's law is :

A

0.8

B

0.5

C

0.2

D

0.4

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The correct Answer is:
A
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