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On addition of a volatile liquid A to an...

On addition of a volatile liquid `A` to another volatile liquid `B` in any proportiona will always………the vapour pressure of `B`:

A

(a) Decrease

B

(b) Increase

C

(c ) Increase or decrease

D

(d) None of these

Text Solution

Verified by Experts

The correct Answer is:
C
`V.P.` of mixture lies in between vapour pressure of two liquids.
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If P_(A) is the vapour pressure of a pure liquid A and the mole fraction of A in the mixture of two liquids A and B is x, the parial vapour pressure of A is:

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Statement-1 : On evaporation of a solution of two volatile liquids, vapour will always be rich in more volatile component. Statement-2 : More volatile component has lowest boiling point.