Chemistry · 2025
JEE Main · 23 January 2025, Shift 2 · Q54
When a non-volatile solute is added to the solvent, the vapour pressure of the solvent decreases by 10 mm of Hg. The mole fraction of the solute in…
When a non-volatile solute is added to the solvent, the vapour pressure of the solvent decreases by $\displaystyle 10$ mm of Hg . The mole fraction of the solute in the solution is $\displaystyle 0.2$ . What would be the mole fraction of the solvent if decrease in vapour pressure is $\displaystyle 20$ mm of Hg ?
Official answer
From NTA’s final answer key for this paper.
(1)
$\displaystyle 0.6$
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JEE Main 2025 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.