NEET Chemistry Thermodynamics PYQ Analysis 2020–2026: Topic-wise Trends & Practice
Thermodynamics (NEET Chemistry): 16 questions in 2020–2026, 4% of the subject. Topic-wise trends, difficulty split, repeated topics and PYQ practice.
Edurack Team
October 13, 2026
Thermodynamics gave 16 of the 398 NEET Chemistry questions asked between 2020 and 2026 (Re-NEET 2026 included). That is 4% of the subject and the #11 chapter out of 31 by weightage, about 2 questions per paper. It peaked at 3 in NEET 2024.
Of the 16 questions tagged for difficulty, 19% were easy, 43% medium and 38% hard, so this is a chapter that tends to bring the tougher questions.
Its weight has stayed steady: 1.7 questions per paper in 2020–2022 and 2 across 2025, 2026 and Re-NEET 2026.
Year-wise questions from Thermodynamics
| Paper | Questions |
|---|---|
| NEET 2020 | 2 |
| NEET 2021 | 2 |
| NEET 2022 | 1 |
| NEET 2023 | 2 |
| NEET 2024 | 3 |
| NEET 2025 | 1 |
| NEET 2026 | 2 |
| Re-NEET 2026 | 3 |
Difficulty split
| Level | Questions | Share |
|---|---|---|
| Easy | 3 | 19% |
| Medium | 7 | 43% |
| Hard | 6 | 38% |
Topic-wise analysis
Every topic tagged under Thermodynamics, most-asked first. "Papers" is the number of the 8 papers in which the topic appeared.
| Topic | Total Qs | Easy | Medium | Hard | Papers | Asked in |
|---|---|---|---|---|---|---|
| Change in Thermodynamics Properties in Expansion or Contraction of Gas | 2 | 0 | 2 | 0 | 2 | 2020 and 2021 |
| Enthalpy Change (Standard Enthalpy of Formation (ΔH°f)) | 1 | 0 | 0 | 1 | 1 | 2025 |
| Enthalpy Change (Thermochemical Equations) | 1 | 0 | 1 | 0 | 1 | Re-NEET 2026 |
| Gibbs Energy Change and Equilibrium | 1 | 0 | 0 | 1 | 1 | 2026 |
| Gibbs Energy Change and Non-Mechanical Work | 1 | 0 | 1 | 0 | 1 | 2023 |
| Internal Energy | 1 | 1 | 0 | 0 | 1 | 2026 |
| Measurement of dU and dH: Bomb Calorimeter (dH Measurements) | 1 | 1 | 0 | 0 | 1 | 2023 |
| Pressure-Volume Work | 1 | 0 | 1 | 0 | 1 | 2022 |
| Relationship Between Cp and Cv (Relationship Between Heat of Reaction at Constant P…) | 1 | 1 | 0 | 0 | 1 | 2021 |
| Spontaneity: Second Law of Thermodynamics (Entropy and Spontaneity) | 1 | 0 | 0 | 1 | 1 | 2020 |
| Spontaneity: Second Law of Thermodynamics (Entropy for Different Processes) | 1 | 0 | 0 | 1 | 1 | 2024 |
| Spontaneity: Second Law of Thermodynamics (Entropy) | 1 | 0 | 0 | 1 | 1 | Re-NEET 2026 |
| Thermodynamic Processes (Adiabatic Process) | 1 | 0 | 1 | 0 | 1 | 2024 |
| Thermodynamic Processes (Isothermal Process) | 1 | 0 | 1 | 0 | 1 | 2024 |
| Work | 1 | 0 | 0 | 1 | 1 | Re-NEET 2026 |
Which topics matter most
Most-tested topics
- Change in Thermodynamics Properties in Expansion or Contraction of Gas: 2 Qs
- Enthalpy Change (Standard Enthalpy of Formation (ΔH°f)): 1 Q
- Enthalpy Change (Thermochemical Equations): 1 Q
- Gibbs Energy Change and Equilibrium: 1 Q
- Gibbs Energy Change and Non-Mechanical Work: 1 Q
What the latest papers asked
Topics from NEET 2026 and Re-NEET 2026:
- Enthalpy Change (Thermochemical Equations)
- Gibbs Energy Change and Equilibrium
- Internal Energy
- Spontaneity: Second Law of Thermodynamics (Entropy)
- Work
Where the hard questions came from
- Enthalpy Change (Standard Enthalpy of Formation (ΔH°f)): 1 hard of 1
- Gibbs Energy Change and Equilibrium: 1 hard of 1
- Spontaneity: Second Law of Thermodynamics (Entropy and Spontaneity): 1 hard of 1
- Spontaneity: Second Law of Thermodynamics (Entropy for Different Processes): 1 hard of 1
- Spontaneity: Second Law of Thermodynamics (Entropy): 1 hard of 1
- Work: 1 hard of 1
How to use this data
- No single topic dominates here. The 15 topics are spread widely, with 14 asked only once, so cover the whole NCERT chapter rather than a short list.
- 38% were hard. After the basics, practise multi-step and application questions from the hard-tagged topics.
- Re-solve the 5 topics from NEET 2026 and Re-NEET 2026, since they show the current style of questions.
- Then attempt the chapter's past questions under a timer and note which topics cost you marks.
Practise Thermodynamics PYQs
Solve every Thermodynamics question from 2020–2026 with solutions on Edurack:
- Practise Thermodynamics PYQs
- See the full Thermodynamics blueprint page
- NEET Chemistry PYQ analysis: all chapters
Related chapters
- Some Basic Concepts of Chemistry: #10 in Chemistry, 17 questions
- Electrochemistry: #12 in Chemistry, 15 questions
Frequently Asked Questions
How many questions came from Thermodynamics in NEET 2020–2026?
Thermodynamics contributed 16 NEET Chemistry questions across the 8 papers from 2020–2026, which is 4% of the subject.
Which topics of Thermodynamics are asked most often?
The most-tested topics are Change in Thermodynamics Properties in Expansion or Contraction of Gas: 2 Qs, Enthalpy Change (Standard Enthalpy of Formation (ΔH°f)): 1 Q and Enthalpy Change (Thermochemical Equations): 1 Q.
Is Thermodynamics easy or difficult in NEET?
Of 16 difficulty-tagged questions, 19% were easy, 43% medium and 38% hard.
Was Thermodynamics asked in NEET 2026?
Yes. It had 2 questions in NEET 2026 and 3 questions in Re-NEET 2026.