Chemical Thermodynamics JEE Advanced PYQ Chapter Wise

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Answer first

Chemical Thermodynamics PYQs (previous year questions) for JEE Advanced: Chemical Thermodynamics (Chemistry) had 23 questions across the 22 official JEE Advanced papers we tagged (2016–2026), and appeared in 17 of them. Asked in 11 of 11 years. The concepts asked in the most papers: Gibbs Energy, Entropy, Enthalpy.

Year-wise question count

Asked in 11 of 11 years, with 2 papers each year.

Most-asked concepts

Sorted by the number of papers a concept appeared in.

How to practise Chemical Thermodynamics PYQs

1. Start with the concepts at the top of the table. They have come back the most.
2. Solve one year’s Chemical Thermodynamics questions from the official PDF against the clock, then check the answer listed below.
3. Log every miss as a concept gap, a calculation slip or a misread. Each needs a different fix.
4. 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 Advanced2026

• Q.1 (Paper 1) · MCQ · Work Done: Work in two-step compression of an ideal gas at constant temperature (official answer: B) PDF
• Q.13 (Paper 1) · Matching · Enthalpy and Entropy: Match processes with signs of enthalpy and entropy change (official answer: C) PDF

JEE Advanced2025

• Q.11 (Paper 1) · Numerical · Work of Expansion: Expansion work when water is electrolysed at constant pressure (official answer: -29.95–-29.8 OR 29.8–29.95) PDF

JEE Advanced2024

• Q.8 (Paper 1) · Integer · Enthalpy: Enthalpy change of an ideal gas from a V-T diagram (official answer: 8000 or 8120 or 8300) PDF

JEE Advanced2023

• Q.11 (Paper 1) · Integer · Adiabatic Process: Find 2 log V3 from heat absorbed over adiabatic and isothermal steps (official answer: 7) PDF
• Q.14 (Paper 2) · Numerical · Entropy: Entropy difference between two phases at 300 K (official answer: 0.30–0.32) PDF
• Q.15 (Paper 2) · Numerical · Enthalpy: Enthalpy difference between two phases at 300 K (official answer: 300.00) PDF

JEE Advanced2022

• Q.1 (Paper 1) · Numerical · Bomb Calorimetry: Enthalpy of formation of HgO from bomb calorimeter data (official answer: 89.00–91.00) PDF
• Q.10 (Paper 2) · MSQ · Entropy: Statements on entropy changes in reactions and cells (official answer: B, C, D) PDF

JEE Advanced2021

• Q.7 (Paper 1) · Numerical · Gibbs Energy: Standard enthalpy from a ln p versus 1/T plot PDF
• Q.8 (Paper 1) · Numerical · Gibbs Energy: Standard entropy change from a ln p versus 1/T plot PDF
• Q.14 (Paper 1) · MSQ · Thermodynamic Processes: Plots for isothermal then adiabatic reversible expansion PDF
• Q.17 (Paper 2) · Integer · Thermodynamic Processes: Volume ratio when work in two reversible processes is equal PDF

JEE Advanced2020

• Q.7 (Paper 1) · MSQ · Work and Internal Energy: Conditions under which a van der Waals work expression applies PDF
• Q.17 (Paper 2) · Numerical · Gibbs Energy: Minimum temperature for coke reduction of cassiterite PDF

JEE Advanced2019

• Q.7 (Paper 1) · MSQ · Enthalpy of Formation: Reactions whose enthalpy equals the enthalpy of formation (official answer: C, D) PDF

JEE Advanced2018

• Q.6 (Paper 1) · MSQ · Cyclic Process: Signs of q, w, H and U in a reversible cyclic process PDF
• Q.11 (Paper 1) · Numerical · Ideal Gas Equilibrium: Final volume of a compartment after a sliding conducting partition PDF
• Q.12 (Paper 2) · Numerical · Gibbs Energy: Minimum H2 pressure to prevent oxidation of copper by steam PDF

JEE Advanced2017

• Q.19 (Paper 1) · MSQ · Work and Internal Energy: Ideal gas expansion statements on work and internal energy (official answer: A, B, C) PDF
• Q.21 (Paper 2) · MCQ · Gibbs Energy: Pressure at which graphite and diamond are in equilibrium (official answer: A) PDF

JEE Advanced2016

• Q.20 (Paper 1) · MCQ · Entropy: Entropy change of surroundings in isothermal irreversible expansion (official answer: C) PDF
• Q.33 (Paper 1) · Integer · Kinetic Theory of Gases: Change in diffusion coefficient with temperature and pressure (official answer: 4) PDF

Chemical Thermodynamics in other exams

The same chapter in other official papers we tagged: JEE Main (14 questions), NEET (3 questions).

Other Chemistry chapters

• Some Basic Concepts in Chemistry PYQs
• Atomic Structure PYQs
• Chemical Bonding and Molecular Structure PYQs
• Solutions PYQs
• Equilibrium PYQs
• Redox Reactions and Electrochemistry PYQs
• Chemical Kinetics PYQs
• Classification of Elements and Periodicity PYQs
• p-Block Elements PYQs
• d- and f-Block Elements PYQs
• Coordination Compounds PYQs
• Purification and Characterisation of Organic Compounds PYQs
• Some Basic Principles of Organic Chemistry PYQs
• Hydrocarbons PYQs
• Organic Compounds Containing Halogens PYQs
• Organic Compounds Containing Oxygen PYQs
• Organic Compounds Containing Nitrogen PYQs
• Biomolecules PYQs
• Principles Related to Practical Chemistry PYQs

FAQ

How many Chemical Thermodynamics questions come in JEE Advanced?

In the official papers we tagged: 2 in 2026, 1 in 2025, 1 in 2024, 3 in 2023, 2 in 2022, 4 in 2021, 2 in 2020, 1 in 2019, 3 in 2018, 2 in 2017 and 2 in 2016 (2 papers each year). That is 23 questions in all, about 6% of Chemistry.

Which Chemical Thermodynamics topics repeat in JEE Advanced?

Asked in the most papers: Gibbs Energy, Entropy, Enthalpy. The concept table lists every one with its count.

Are these official JEE Advanced questions?

Yes. Every question is from an official JEE Advanced paper hosted on our year pages. The one-line summaries are ours; open the PDF linked beside each question for the full text.