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Two liquids X and Y from an ideal soluto...

Two liquids X and Y from an ideal soluton. The mixture has a vapour pressure of 400 mm at 300K when mixed in the molar ratio of 1:1 and a vapour pressure of 350mm when mixed in the molar mass ratio of 1:2 at the same temperature. The vapour pressures of the two pure liquids X and Y respectively are

A

250mm, 550mm

B

350mm, 450mm

C

350mm, 700mm

D

550mm, 250mm

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550mm, 250mm
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