Two liquids A and B have the same molecular weight and form an ideal solution. The solution has a vapour pressure of 700 torr at 80∘ C. It is distilled till 23rd of the solution (mole basis) is collected as condensate. The composition of the condensate is X′A=0.75 and that of the residue is X′′A=0.30. If the vapour pressure of the residue at 80∘C is 600 torr, which of the following option(s) is/are correct.

Two liquids A and B have the same molecular weight and form an ideal s

1.	Two liquids A and B have the same molecular weight and form an ideal solution. The solution has a vapour pressure of 700 torr at 80∘ C. It is distilled till 23rd of the solution (mole basis) is collected as condensate. The composition of the condensate is X′A=0.75 and that of the residue is X′′A=0.30. If the vapour pressure of the residue at 80∘C is 600 torr, which of the following option(s) is/are correct.
Answer» Two liquids A and B have the same molecular weight and form an ideal solution. The solution has a vapour pressure of 700 torr at $80^{\circ}$ C. It is distilled till $\frac{2}{3}$ rd of the solution (mole basis) is collected as condensate. The composition of the condensate is $X_{A}^{'} = 0.75$ and that of the residue is $X_{A}^{''} = 0.30$ . If the vapour pressure of the residue at $80^{\circ}$ C is 600 torr, which of the following option(s) is/are correct.