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

The vapour pressure of a pure liquid A is 40 mm Hg at 310 K . The vapour pressure of this liquid in a solution with liquid B is 32 mm 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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