Solutions — JEE Main 2026 · 23 Jan, Morning shift · Q57

Question

Which one of the following graphs accurately represents the plot of partial pressure of CS₂ vs its mole fraction in a mixture of acetone and CS₂ at constant temperature ?

Accepted Answer

(B) Graph of p CS₂ alone: a solid curve rising from 0 at pure acetone to p° CS₂ at pure CS₂, lying above the dashed Raoult's law line and starting along a steeper dashed Henry's law line

Answer

(A) Graph with p° acetone and p° CS₂ joined by dashed Raoult's-law lines, and solid partial- and total-pressure curves sagging below them (negative deviation)

Answer

(C) Graph with dashed Raoult's-law lines and solid partial- and total-pressure curves bulging above them (positive deviation) for both components

Answer

(D) Graph of straight lines only: both partial-pressure lines and the total-pressure line are linear (ideal behaviour)

Solutions: JEE Main 2026 Chemistry question

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Solutions: JEE Main 2026 Chemistry question

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