JEE Main Vapour Pressure and Raoult's Law PYQ PDF is a free, 14-page resource containing 55 questions from the 2002-2026 papers. The topic recorded 8 questions across the 2026 papers, with a reported weightage of 1.68% in the referenced database.
The PDF includes 41 MCQs alongside 14 numerical-value questions, with 4 statement-based questions and 1 question that refers to a figure or graph. Questions are arranged from newest to oldest to help students practise recent exam patterns and revise key concepts.
The PDF Contains:
| 55 Questions | 14 Page | 1.68% ↑33.33% Weightage in 2026 | 2002-2026 years covered |
Vapour Pressure and Raoult's Law is a topic in the Class 12 Chemistry chapter Solutions. Every question carries its exam date and shift. The PDF holds questions only, with options as printed and no answer key.
JEE Main Vapour Pressure and Raoult's Law Weightage by Year
As per JEE Main Vapour Pressure and Raoult's Law weightage from past years, students can expect 2 to 8 questions from this topic in a year in recent papers. The 2026 papers had 8.
| Year | Questions | Average per Shift | Weightage in Chemistry | Change in Weightage |
|---|---|---|---|---|
| 2026 | 8 | 0.42 | 1.68% | +33.33% |
| 2025 | 6 | 0.32 | 1.26% | +278.95% |
| 2024 | 2 | 0.10 | 0.33% | −52.00% |
| 2023 | 5 | 0.21 | 0.69% | +59.26% |
| 2022 | 3 | 0.13 | 0.44% | +13.37% |
The 2021 papers add 3 more questions, and the years before that add 28. Weightage is the topic's share of all Chemistry questions in the bank for that year.
Question Formats in JEE Main Vapour Pressure and Raoult's Law PYQs
The 55 questions in this PDF are split between multiple-choice and numerical-value questions. Of the 55, 4 are statement-based and 1 refers to a figure or graph.
| Question Type | Questions | Share |
|---|---|---|
| MCQ | 41 | 74.5% |
| Numerical value | 14 | 25.5% |
| Total | 55 | 100% |
How to Practise Vapour Pressure and Raoult's Law
Revise Raoult's law, p = x₁p₁°, and the relative lowering of vapour pressure, (p° − p)/p° = x₂ for a non-volatile solute. Practise ideal binary solutions, using Dalton's law to find the composition of the vapour.
Then study positive and negative deviations from Raoult's law and the numericals that give a percentage lowering or ask for the mass of solute.
Video: Vapour Pressure and Raoult's Law PYQs
Source: JSM Learn
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