Consider an ideal solution containing two liquids A and B. On heating to 90ºC, the vapour pressures exerted by A and B are 200 and 150 mm Hg respectively. If the vapours above the ideal solution consisting of 1 mole of A and 1 mole of B are condensed and the condensate heated to 90ºC again, vapours are again formed. If these are again condensed to a liquid X, calculate the vapour pressure of A in the vapours of liquid X.
