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The vapour pressure of benzene and pure ...

The vapour pressure of benzene and pure toluene at `70^(@)C` are 500 mm and 200 mm Hg respectively. If they form an ideal solution what is the mole fraction of benzene in a mixture boiling at `70^(@)C` at a total pressure of 380 mm Hg?

A

0.2

B

0.4

C

0.6

D

0.8

Text Solution

Verified by Experts

The correct Answer is:
C
Let mol fraction of Benzene is x
`:. 380 = x xx 500 +(1-x) 200` or `x = 0.6`
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