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Two liquids A and B form ideal solutions...

Two liquids A and B form ideal solutions. At 300 K, the vapour pressure of a solution containing 1 mole of A and 3 moles of B is 550 mm Hg . At the same temperature , if one more mole of B is added to this solution, the vapour pressure of the solution increases by 10 mm Hg. The vapour pressures of A and B in their pure states are respectively

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(i) `60.86^(@)C`
(ii) `P_(A)^(@)=400` mm and
`P_(A)^(@)=600 mm`
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