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A mixture of toluene and benzene boils a...

A mixture of toluene and benzene boils at `100^(@)C`. Assuming ideal behaviour, the mole fraction of toluene in the mixture is closest to [Vapour presure of pure toluene and pure benzene at `100^(@)C` are 0.742 and 1.800 bar respectively. 1 atm = 1.013 bar]

A

0.824

B

0.744

C

0.544

D

0.624

Text Solution

Verified by Experts

The correct Answer is:
B
`1.013=0.742X_(t)+1.8 X_(b)`
`1.013=0.742(1-X_(b))+1.8 X_(b)`
`X_(b)=0.256`
`:. X_(t)=1-X_(b)=0.744`
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