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The vapour pressure of a certain pure li...

The vapour pressure of a certain pure liquid A at 298 K is 40 mbar. When a solution of B is prepared in A at the same temperature, the vapour pressure is found to be 32 mbar. The mole fraction of A in the solution is

A

0.5

B

0.2

C

0.1

D

0.8

Text Solution

Verified by Experts

The correct Answer is:
D
`p=p_(A)^(0)x_(A)`
`32=40xxx_(A)or x_(A)=0.8`]
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