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In binary ideal solution forms by liquid...

In binary ideal solution forms by liquid A and B, at constant temperature, mole -fraction of liquid A in vapour state is 0.4 and its partial vapour pressure is 400 mm,then what will be the partial vapour pressure of B ?

A

600 mm

B

300 mm

C

500 mm

D

200 mm

Text Solution

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The correct Answer is:
A
`Y_(A) = 0.4 A ` and `P_(A) = 400mm, P_(B) = 1000-400 = 600mm `
`P_(A) = P_("total") xxY_(A) ` `:. 400 =P xx 0.4 ``:. P _("total") = 1000mm`
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