Q 1640091813.     Benzene and toluene combine to form an
ideal solution. At `80^(circ)C`, vapour pressure of
pure benzene is `800` mmHg and the vapour
pressure of pure toluene is `300` mmHg. If the
vapour pressure of the solution is `400` mmHg,
what are the mole fractions of benzene and
toluene?

GGSIPU 2015
A

`60%` benzene and `40%` toluene

B

`50%` benzene and `50%` toluene

C

`40%` benzene and `60%` toluene

D

`20%` benzene and `80%` toluene

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