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1 mole of liquid A and 9 moles of liquid...

1 mole of liquid A and 9 moles of liquid B are mixed to form a solution. If `"P"_("B")^(@)=400"mm"` of Hg and `"P"_("A")^(@)=20 "mm"` of Hg at a temperature 'T' and normal boiling point of liquid B is 300K then answer the questions that follow.
Given data: `"K"_("b")=2.7"K kg mol"^(-1),` Molar mass of B=100
If 'A' is perfectly non volatile and it dimerises to and extent of 60% then what will be the vapour pressure of the solution.

A

`360 mm` of `Hg`

B

`(3600)/(9.7) mm` of `Hg`

C

`(4000)/(9.7) mm` of `Hg`

D

`36 mm` of `Hg`

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B
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