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

The vapour pressure of a pure liquid A is 60 torr at 300K. It forms an ideal solution with another liquid B. The mole fraction of B is 0.25 and the total pressure of the solution is 82.5 torr at 300K. The vapour pressure of pure liquid B at 300K is

A

37.5

B

150

C

75

D

187.5

Text Solution

Verified by Experts

The correct Answer is:
B
`82.5 = 60 xx 0.75 +x xx 0.5`or `x = 150` torr
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