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ChemistryJEE Main 23 Jan 2026, Shift 2·Q22·Numerical·Easy–moderate

Solutions · Raoult law vapour pressure

Two liquids A and B form an ideal solution. At 320 K, the vapour pressure of the solution, containing 3 mol of A and 1 mol of B is 500 mm Hg. At the same temperature, if 1 mol of A is further added to this solution, vapour pressure of the solution increases by 20 mm Hg. Vapour pressure (in mm Hg) of B in the pure state is . (Nearest integer)

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See the full 23 Jan 2026, Shift 2 paper