CBSE Class 12 Chemistry Previous Year Question Papers (2022–2026)
Download every CBSE Class 12 Chemistry board paper from 2022–2026 as a free PDF, with the official CBSE marking scheme. Or practise all 432 questions online, one by one, with answers (411 have marking-scheme solutions).
Key facts
- Highest-weightage chapters: Coordination Compounds (9.1 marks), Aldehydes, Ketones & Carboxylic Acids (8.0 marks), Electrochemistry (7.1 marks) on average per paper, across 8 board papers
- Paper pattern 2026-27: 50 marks, 28 questions in 4 sections; unchanged from 2025-26 (CBSE notice, 21 Sep 2026)
- Board papers available: 10 papers from 2022 to 2026 with official marking schemes, free PDF
- Practice questions: 432 questions, 411 with marking-scheme answers, free online
Class 12 Chemistry board papers with marking schemes
Two sets per year from different CBSE regions. Question papers are published by CBSE; click a PDF to download it free.
| Paper | Questions | Free download | Answers | Online |
|---|---|---|---|---|
| Board exam 2026 · Set 56/1/1 | 33 | Question paper PDF | Marking scheme PDF | Practise online |
| Board exam 2026 · Set 56/2/1 | 33 | Question paper PDF | Marking scheme PDF | Practise online |
| Board exam 2025 · Set 56/1/1 | 33 | Question paper PDF | Marking scheme PDF | Practise online |
| Board exam 2025 · Set 56/2/1 | 32 | Question paper PDF | Marking scheme PDF | Practise online |
| Board exam 2024 · Set 56/1/1 | 33 | Question paper PDF | Marking scheme PDF | Practise online |
| Board exam 2024 · Set 56/2/1 | 33 | Question paper PDF | Marking scheme PDF | Practise online |
| Board exam 2023 · Set 56/1/1 | 35 | Question paper PDF | Marking scheme PDF | Practise online |
| Board exam 2023 · Set 56/2/1 | 35 | Question paper PDF | Marking scheme PDF | Practise online |
| Board exam 2022 · Set 56/1/1 · Term 2 | 12 | Question paper PDF | Marking scheme PDF | Practise online |
| Board exam 2022 · Set 56/2/1 · Term 2 | 12 | Question paper PDF | Marking scheme PDF | Practise online |
Class 12 Chemistry sample paper 2026-27
CBSE released the 2026-27 Sample Question Paper on 21 September 2026 and confirmed there is no change in the question paper design for 2026-27. Practise it first: it shows exactly how your board paper will look.
| Paper | Questions | Free download | Answers | Online |
|---|---|---|---|---|
| Sample paper 2026-27 | 28 | Question paper PDF | Marking scheme PDF | Practise online |
Chapter-wise weightage (from 8 board papers)
Average marks each chapter carried per board paper. Start revision with the chapters at the top.
| Chapter | Share | Avg. marks per paper |
|---|---|---|
| Coordination Compounds | 9.1 | |
| Aldehydes, Ketones & Carboxylic Acids | 8.0 | |
| Electrochemistry | 7.1 | |
| Biomolecules | 6.2 | |
| Solutions | 6.1 | |
| Chemical Kinetics | 5.8 | |
| d- & f-Block Elements | 4.9 | |
| Amines | 4.5 | |
| Alcohols, Phenols & Ethers | 4.2 | |
| Haloalkanes & Haloarenes | 4.1 |
Most repeated Chemistry questions in CBSE board exams
The same question, or a near-identical one, appeared in more than one CBSE board exam year.
- A first order reaction is 50% complete in 30 minutes at 300 K and in 10 minutes at 320 K. Calculate activation energy (Ea) for the reaction. [R = 8.314 J K–1 mol–1] 3 [Given : log 2 = 0.3010, log 3 = 0.4771, log 4 = 0.60…
Asked in 2022, 2023, 2025Chemical Kinetics3 marks - Assertion (A) : Aromatic primary amines cannot be prepared by Gabriel Phthalimide synthesis. Reason (R) : Aryl halides do not undergo nucleophilic substitution reaction with the anion formed by phthalimide.
Asked in 2024, 2025, 2026Amines1 mark - Assertion (A) : Aromatic primary amines can be prepared by Gabriel Phthalimide synthesis. 1 Reason (R) : Aryl halides do not undergo nucleophilic substitution with the anion formed by phthalimide.
Asked in 2024, 2025, 2026Amines1 mark - A certain reaction is 50% complete in 20 minutes at 300 K and the same reaction is 50% complete in 5 minutes at 350 K. Calculate the activation energy if it is a first order reaction. [R = 8.314 J K-1 mol-1; log 4 = 0.60…
Asked in 2023, 2025Chemical Kinetics3 marks - The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometrical shapes of coordination compounds whereas for coordination compounds is based on the effect of different crystal fields (provided by…
Asked in 2024, 2026Coordination Compounds4 marks - The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometry of coordination compounds. The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields…
Asked in 2024, 2026Coordination Compounds4 marks
Class 12 Chemistry paper pattern
Based on the sample paper 2026-27 (50 marks).
| Section | Questions | Marks |
|---|---|---|
| Section A | 16 × 1 mark | 16 |
| Section B | 4 × 2 marks | 8 |
| Section C | 6 × 3 marks | 18 |
| Section D | 2 × 4 marks | 8 |
CBSE additional practice papers for Class 12 Chemistry
| Paper | Questions | Free download | Answers | Online |
|---|---|---|---|---|
| Additional practice paper 2023-24 | 33 | Question paper PDF | Marking scheme PDF | Practise online |
| Additional practice paper 2023-24 · Set 2 | 33 | Question paper PDF | Marking scheme PDF | Practise online |
| Additional practice paper 2022-23 | 35 | Question paper PDF | Marking scheme PDF | Practise online |
| Additional practice paper 2021-22 | 12 | Question paper PDF | Not published | Practise online |
Frequently asked questions
Where can I download CBSE Class 12 Chemistry previous year question papers for free?
All CBSE Class 12 Chemistry board papers from 2022–2026 are listed on this page as free PDF downloads, together with the official marking schemes. You can also practise every question online in the free BoardPrep app.
Are marking schemes included with the Class 12 Chemistry papers?
Yes. The official CBSE marking scheme is linked next to each paper where CBSE has published it. In the app, 411 of the 432 questions show their marking-scheme answer.
Which chapters carry the most marks in Class 12 Chemistry?
In recent board papers the highest-weightage chapters were Coordination Compounds, Aldehydes, Ketones & Carboxylic Acids, Electrochemistry. See the chapter-wise weightage table above for the full list.
Has the CBSE exam pattern changed for 2026-27?
No. CBSE's notification of 21 September 2026 says there is no change in the question paper design or assessment pattern for 2026-27, and the passing criteria stay the same as 2025-26.
Is BoardPrep free?
Yes. All papers, the question bank, the paper generator, mock tests and the Pattern Challenge are free to use.
Practise Class 12 Chemistry free
Question-wise practice with answers, chapter tests, board-pattern paper generator with PDF download, and a daily streak to keep you going.