Two volatile liquids X and Y form an ideal binary solution and variation of vapour pressure versus mole fraction is decribed in the following diagram. Which of the following statement regarding pure X, pure Y and the solution of X and Y is correct? $\left(P_x^0>P_y^0\right)$ 

 

Vapour pressure of X in pure state is greater than that of Y in pure state at same
temperature

At point Z, the mole fraction of X in the vapour phase, which is in equilibrium with the
solution is 0.6

Vapour pressure of solution at point Z is 480mm of Hg

Attractive intermolecular interaction between X-X in pure liquid X and Y-Y in pure
liquid Y is same