Two liquids form an ideal solution. At 300 K, vapour pressure of the solution containing 1 mol of X and 3 mol of Y is 550 mm Hg. At the same temperature, if 1 mol of Y is further added to this solution, vapour pressure of the solution increases by 10 mm Hg. Vapour pressure (in mm Hg) of
in their pure states will be, respectively
200 and 300
300 and 400
400 and 600
500 and 600
As we learnt in
Rault's Law -
The total vapour pressure of binary mixture of miscible liquids be having ideally is given by
Where and
are mole fraction of A and B in liquid phase.
- wherein
and
are vapour pressures of pure liquids.
Given that 1 mole x & 3 mole y
(1)
After adding 1 mole y the vapour pressure is 560
(2)
By solving equation 1 & 2
Correct option is 3.
Option 1)
200 and 300
This is an incorrect option.
Option 2)
300 and 400
This is an incorrect option.
Option 3)
400 and 600
This is the correct option.
Option 4)
500 and 600
This is an incorrect option.