3.Two liquids X and Y form an ideal solution. At 300 K, vapour pressure of the solution containing 1 mole of X and 3 mol of Y is 550 mmHg. At the same temperature, if 1mol of Y is further added to this solution, vapour pressure of the solution increase by 10mmHg, Vapour pressure of X and Y in their pure states will be respectively
a. 200 and 300
b. 300 and 400
c. 400 and 600
d. 500 and 600
Ans. c
(4)