JEE Main 2026 Chemistry question

Two liquids A and B form an ideal solution at temperature T K. At T K, the vapour pressures of pure A and B are 55 and 15 k Nm⁻² respectively. What is the mole fraction of A in solution of A and B in equilibrium with a vapour in which the mole fraction of A is 0.8 ?

• (1)0.5217Correct
• (2)0.480
• (3)0.663
• (4)0.340