Explore: All CBSE Class 12 chapters · CBSE Class 12 hub · Syllabus & pattern · Class 12 2026
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CBSE Class 12 Chemistry PYQs (previous year questions), chapter wise: we tagged 288 Chemistry questions from 50 official CBSE Class 12 papers (2016–2026). The chapters asked most are Chemical Kinetics (28), Solutions (25), Haloalkanes and Haloarenes (25). Open any chapter for every question it has had.
Chemistry chapters ranked by questions
- Chemical Kinetics PYQs: 28 questions; most asked: Arrhenius Equation
- Solutions PYQs: 25 questions; most asked: Freezing Point Depression
- Haloalkanes and Haloarenes PYQs: 25 questions; most asked: Halogenation Reactions
- Amines PYQs: 24 questions; most asked: Basicity of Amines
- The d- and f-Block Elements PYQs: 23 questions; most asked: Transition Elements
- Alcohols, Phenols and Ethers PYQs: 23 questions; most asked: Properties of Alcohols
- Aldehydes, Ketones and Carboxylic Acids PYQs: 23 questions; most asked: Carbonyl Reactions
- Biomolecules PYQs: 23 questions; most asked: Carbohydrates
- Electrochemistry PYQs: 22 questions; most asked: Nernst Equation
- Coordination Compounds PYQs: 22 questions; most asked: Crystal Field Theory
- The p-Block Elements PYQs: 13 questions; most asked: Group 15-17 Properties
- Surface Chemistry PYQs: 11 questions; most asked: Colloids
- The Solid State PYQs: 8 questions; most asked: Unit Cell Calculations
- General Principles of Isolation of Elements PYQs: 6 questions; most asked: Extraction of Metals
- Polymers PYQs: 6 questions; most asked: Monomers
- Chemistry in Everyday Life PYQs: 6 questions; most asked: Drugs
Chemistry questions by year
| Chapter | 2026 | 2025 | 2024 | 2023 | 2022 | 2020 | 2019 | 2018 | 2017 | 2016 | All questions |
|---|---|---|---|---|---|---|---|---|---|---|---|
| The Solid State | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 2 | 2 | 8 |
| Solutions | 4 | 4 | 3 | 4 | 0 | 3 | 2 | 2 | 1 | 2 | 25 |
| Electrochemistry | 3 | 3 | 3 | 4 | 2 | 2 | 1 | 1 | 2 | 1 | 22 |
| Chemical Kinetics | 4 | 2 | 4 | 4 | 2 | 4 | 2 | 2 | 2 | 2 | 28 |
| Surface Chemistry | 0 | 0 | 0 | 0 | 1 | 2 | 2 | 2 | 2 | 2 | 11 |
| General Principles of Isolation of Elements | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 1 | 1 | 1 | 6 |
| The p-Block Elements | 0 | 0 | 0 | 0 | 0 | 3 | 2 | 2 | 3 | 3 | 13 |
| The d- and f-Block Elements | 3 | 4 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 23 |
| Coordination Compounds | 3 | 3 | 2 | 3 | 1 | 2 | 2 | 2 | 2 | 2 | 22 |
| Haloalkanes and Haloarenes | 3 | 4 | 3 | 3 | 0 | 4 | 2 | 2 | 2 | 2 | 25 |
| Alcohols, Phenols and Ethers | 4 | 3 | 4 | 3 | 0 | 2 | 1 | 2 | 2 | 2 | 23 |
| Aldehydes, Ketones and Carboxylic Acids | 2 | 3 | 5 | 2 | 2 | 3 | 2 | 2 | 1 | 1 | 23 |
| Amines | 3 | 3 | 2 | 5 | 2 | 2 | 2 | 1 | 2 | 2 | 24 |
| Biomolecules | 4 | 4 | 4 | 4 | 0 | 2 | 2 | 1 | 1 | 1 | 23 |
| Polymers | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 1 | 1 | 1 | 6 |
| Chemistry in Everyday Life | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 1 | 1 | 1 | 6 |
Most-asked Chemistry concepts
| Concept | Chapter | Questions | Papers |
|---|---|---|---|
| Transition Elements | The d- and f-Block Elements | 11 | 10 |
| Carbonyl Reactions | Aldehydes, Ketones and Carboxylic Acids | 8 | 7 |
| Nernst Equation | Electrochemistry | 7 | 7 |
| Carbohydrates | Biomolecules | 10 | 6 |
| Arrhenius Equation | Chemical Kinetics | 6 | 6 |
| Freezing Point Depression | Solutions | 6 | 6 |
| Colligative Properties | Solutions | 5 | 5 |
| Basicity of Amines | Amines | 5 | 5 |
| Crystal Field Theory | Coordination Compounds | 5 | 5 |
| Colloids | Surface Chemistry | 5 | 4 |
| Rate of Reaction | Chemical Kinetics | 4 | 4 |
| Order and Molecularity | Chemical Kinetics | 4 | 4 |
| Raoult’s Law | Solutions | 4 | 4 |
| Amine Conversions | Amines | 4 | 4 |
| Carbonyl Identification | Aldehydes, Ketones and Carboxylic Acids | 4 | 4 |
How to use CBSE Class 12 Chemistry PYQs
- Start with the chapters at the top of the ranking. They carry the most questions.
- For each chapter, solve its PYQs year by year from the official PDFs, then check the answers.
- Log misses by concept. When a concept repeats in your log, go back to that chapter’s concept table.
- Finish with full CBSE Class 12 papers from the year pages to practise timing.
Other CBSE Class 12 subjects
- CBSE Class 12 Physics PYQs
- CBSE Class 12 Mathematics PYQs
- CBSE Class 12 Biology PYQs
- CBSE Class 12 English Core PYQs
FAQ
Which Chemistry chapters are most important for CBSE Class 12?
By questions in the official papers we tagged (2016–2026): Chemical Kinetics (28), Solutions (25), Haloalkanes and Haloarenes (25). The table on this page ranks every Chemistry chapter.
How many Chemistry questions are in these CBSE Class 12 PYQs?
288 Chemistry questions across 50 official CBSE Class 12 papers from 2016–2026, spread over 16 chapters.
Are these CBSE Class 12 Chemistry PYQs official?
Yes. Every question is from an official CBSE Class 12 paper hosted on our year pages. Summaries are ours; the full question is in the official PDF linked beside it.