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Benzene and toluene form nearly ideal so...

Benzene and toluene form nearly ideal solutions.At `20^@C`, the vapour pressure of benzene is 75 torr. The partial vapour pressure of benzene at`20^@C` for a solution containing `78g`benzene and `46g`touene is torr is

A

`50`

B

`25`

C

`375`

D

`53.5`

Text Solution

Verified by Experts

The correct Answer is:
A
`P'_(A) = P_(B)^(@).X_(B)`
`= 75 xx (78)/((78)/(78)+(46)/(92)) = 75 xx (1)/(1+(1)/(2)) = 75 xx (2)/(3) = 50`
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