JEE Main Chemical Thermodynamics weightage 2022–2026
Chemistry
Chemical Thermodynamics contributed 126 of the 2,932 JEE Main Chemistry questions asked across all shifts between 2022 and 2026 — 4.3% of the subject. In 2024–2026 its share was 4.8%, which makes it the #12 chapter of 20 in the current syllabus by recent weightage (about 1.6% of the whole paper).
Year by year it was asked 27 in 2022, 27 in 2023, 26 in 2024, 22 in 2025 and 24 in 2026. It appeared in 5 of 5 years, with its highest count in 2022.
Its share has stayed fairly steady: 4.9% of the Chemistry paper on average in 2024–2026, against 5% in 2022–2023.
Questions
126
4.3% of Chemistry
Share 2024–2026
4.8%
2022–2023: 5% avg
Rank in subject
#12
of 20 chapters
Years asked
5 of 5
Questions per year
Share of the Chemistry paper by year: 2022 4.5% · 2023 5.5% · 2024 5.9% · 2025 3.7% · 2026 5.1%
What the JEE Main syllabus covers
System and surroundings, state functions, first law, enthalpy, Hess's law, enthalpies of various processes, entropy, second law, spontaneity, Gibbs energy and the equilibrium constant.
Frequently asked questions
How many questions come from Chemical Thermodynamics in JEE Main?
Chemical Thermodynamics had 126 questions across all JEE Main shifts from 2022 to 2026, which is 4.3% of Chemistry. Year by year: 27 in 2022, 27 in 2023, 26 in 2024, 22 in 2025 and 24 in 2026.
Is Chemical Thermodynamics important for JEE Main?
It ranks #12 of 20 Chemistry chapters by share of questions in 2024–2026 (4.8% of the subject). Its share has been steady.
What does the JEE Main syllabus cover in Chemical Thermodynamics?
System and surroundings, state functions, first law, enthalpy, Hess's law, enthalpies of various processes, entropy, second law, spontaneity, Gibbs energy and the equilibrium constant.
Does a high weightage mean Chemical Thermodynamics will be asked again?
No. Weightage shows past frequency, not a promise. Use it to prioritise, and practise previous-year questions to see how the chapter is tested.
Practise JEE Main Chemistry PYQs
Solve JEE previous-year questions with solutions on Edurack.
More JEE Main guides
Counts are compiled from Edurack's JEE Main last five-year analysis (2022–2026) and count questions across all shifts and sessions of each year. Because the number of shifts changes every year, trends compare each chapter's share of the paper among chapters still in the syllabus, not raw counts. Past frequency is a trend guide, not a prediction. Chapters marked "not in syllabus" are absent from NTA's JEE Main 2026 syllabus; always check the latest NTA syllabus before skipping a chapter.