When a non-volatile solute is added to the solvent, the vapour pr… | JEE Main 2025 Chemistry PYQ

MCQEasyJEE Main 2025 · 23 January, Shift 2Raoult's Law & Vapour Pressure

When a non-volatile solute is added to the solvent, the vapour pressure of the solvent decreases by $10 \, \text{mm Hg}$ . The mole fraction of the solute in the solution is $0.2$ . What would be the mole fraction of the solvent if the decrease in vapour pressure is $20 \, \text{mm Hg}$ ?

A
$0.6$
B
$0.4$
C
$0.2$
D
$0.8$

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