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Answer first
Thermodynamics PYQs (previous year questions) for JEE Main: Thermodynamics (Physics) had 11 questions across the 11 official JEE Main papers we tagged (2016–2026), and appeared in 7 of them. Asked in 2 of 3 years. The concepts asked in the most papers: Adiabatic Process, First Law of Thermodynamics, Thermodynamic Processes.
Year-wise question count
Asked in 2 of 3 years.
| Year | Papers | Questions | Per paper |
|---|---|---|---|
| JEE Main 2026 | 9 | 9 | 1 |
| JEE Main 2017 | 1 | Not asked | – |
| JEE Main 2016 | 1 | 2 | 2 |
Most-asked concepts
Sorted by the number of papers a concept appeared in.
| Concept | Questions | Papers | Years |
|---|---|---|---|
| Adiabatic Process | 3 | 3 | 2026 |
| First Law of Thermodynamics | 2 | 2 | 2026 |
| Thermodynamic Processes | 2 | 2 | 2026, 2016 |
| Internal Energy | 1 | 1 | 2026 |
| Laws of Thermodynamics | 1 | 1 | 2026 |
| Molar Specific Heats | 1 | 1 | 2026 |
| Polytropic Process | 1 | 1 | 2016 |
How to practise Thermodynamics PYQs
- Start with the concepts at the top of the table. They have come back the most.
- Solve one year’s Thermodynamics questions from the official PDF against the clock, then check the answer listed below.
- Log every miss as a concept gap, a calculation slip or a misread. Each needs a different fix.
- Once a concept is clean in two papers, move to the next. Then sit a full paper from the year pages.
Questions by year
Each line gives the question number and paper, type, concept, our one-line summary and the official answer, with a link to the official PDF.
JEE Main2026
- Q.33 (2 April, shift 1) · MCQ · First Law of Thermodynamics: Ratio Q : U : W for a diatomic gas heated at constant pressure (official answer: option 4) PDF
- Q.47 (2 April, shift 1) · Numerical · Adiabatic Process: Work done by a gas expanding adiabatically from 8 bar to 1 bar (official answer: 120) PDF
- Q.48 (2 April, shift 2) · Numerical · Molar Specific Heats: Change in internal energy of 5 mol gas heated at constant volume (official answer: 300) PDF
- Q.36 (4 April, shift 1) · MCQ · Thermodynamic Processes: Temperature difference of two samples following a given P-V relation (official answer: dropped in the final key) PDF
- Q.32 (5 April, shift 1) · MCQ · Internal Energy: Statements on ΔU of ideal gas and γ in terms of degrees of freedom (official answer: option 2) PDF
- Q.33 (5 April, shift 1) · MCQ · Laws of Thermodynamics: Statements on zeroth and first laws, isothermal process, extensive variables (official answer: option 3) PDF
- Q.30 (6 April, shift 2) · MCQ · Adiabatic Process: Final volume of right compartment when left side is heated (official answer: option 2) PDF
- Q.35 (8 April, shift 2) · MCQ · First Law of Thermodynamics: Heat supplied to diatomic gas at constant pressure in a piston (official answer: option 1, 2) PDF
- Q.36 (8 April, shift 2) · MCQ · Adiabatic Process: Change in internal energy in adiabatic expansion to 27V (official answer: option 3) PDF
JEE Main2016
Thermodynamics in other exams
The same chapter in other official papers we tagged: GATE ME (38 questions), JEE Advanced (36 questions), NEET (1 question).
Other Physics chapters
- Units and Measurements PYQs
- Kinematics PYQs
- Laws of Motion PYQs
- Work, Energy and Power PYQs
- Rotational Motion PYQs
- Gravitation PYQs
- Properties of Solids and Liquids PYQs
- Kinetic Theory of Gases PYQs
- Oscillations and Waves PYQs
- Electrostatics PYQs
- Current Electricity PYQs
- Magnetic Effects of Current and Magnetism PYQs
- Electromagnetic Induction and AC PYQs
- Electromagnetic Waves PYQs
- Optics PYQs
- Dual Nature of Matter and Radiation PYQs
- Atoms and Nuclei PYQs
- Electronic Devices PYQs
- Experimental Skills PYQs
FAQ
How many Thermodynamics questions come in JEE Main?
In the official papers we tagged: 9 in 2026 (9 papers) and 2 in 2016 (1 paper). Not asked in the other year. That is 11 questions in all, about 4% of Physics.
Which Thermodynamics topics repeat in JEE Main?
Asked in the most papers: Adiabatic Process, First Law of Thermodynamics, Thermodynamic Processes. The concept table lists every one with its count.
Are these official JEE Main questions?
Yes. Every question is from an official JEE Main paper hosted on our year pages. The one-line summaries are ours; open the PDF linked beside each question for the full text.