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At 300 K two pure liquids A and B have v...

At 300 K two pure liquids A and B have vapour pressures respectively 150 mm Hg and 100 mm Hg. In a equimolar liquid mixture of A and B, the mole fraction of B in the vapour phase above the solution at this temperature is:

A

0.6

B

0.5

C

0.8

D

0.4

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The correct Answer is:
D
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