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An ideal solution was obtained by mixing...

An ideal solution was obtained by mixing methanol and ethanol. If the partial vapour pressure of methanol and ethanol are `2.619 kPa` and `4.556 kPa`, respectively, the composition of vapour (in terms of mole fraction) will be

A

`0.635 MeOH, 0.365 EtOH`

B

`0.365 MeOh, 0.635 EtOH`

C

`0.574 MeOH, 0.326 EtOH`

D

`0.173 MeOH, 0.827 EtOH`

Text Solution

Verified by Experts

The correct Answer is:
B
Composition in vapour `= X_("fraction") =(p)/(P_("Total")`
`X_(MeOH) = (2.619)/(7.175) = 0.365`
`:. X_(EtOH) = 0.635R`
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