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Two liquid A and B form an ideal solutio...

Two liquid A and B form an ideal solution. The solution has a vapour pressure of 700 torr at `90^(@)"C"`. It is distilled till `2//(3^("rd"))` of the solution is collected condensate. The composition of the condensate is `"X'"_("A")=0.75` and that of the residue is `"X'"_("A")=0.3.`If the vapour pressure of the residue at `90^(@)"C"` is 600 torr, Which of the following option is correct.

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Two liquid A and B form an ideal solution. The solution has a vapour pressure of 700 torr at 90^(@)C . It is distilled till 2/3 rd of the solution is collected as condensate. The composition of the condensate is X'_(A)=0.75 and that of the residue is X''_(A)=0.3 . If the vapour pressure of the residue at 90^(@) is 600 torr, which of the following option is incorrect?

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The vapour pressure of pure liquid 'A' is 70 torr, at 27^(@)C . It forms an ideal solution with another liquid 'B'. The mole fraction of 'B' is 0.2 and total pressure of the solution is 84 torr at 27^(@)C . Find the vapour pressure of pure liquid B at 27^(@)C .

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