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A mixture of ethyl alcohol and propyl al...

A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of `290mm`at `300K` .The vapour pressure of propyl alcohol is `200mm` .if the mole fraction of ethyl alcohol is `0.6` ,its vapour pressure (in mm)at the same temperature will be

A

350

B

300

C

700

D

360

Text Solution

Verified by Experts

The correct Answer is:
A
`EtoH(A) PrOH(B), P_(T) = P_(A)^(@) x_(A) +P_(B)^(@) (1-x_(A))`
`290 = P_(A)^(@) xx 06 +200 xx 0.4`
`P_(A)^(@) = 360 mm Hg`
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