CBSE Class 10 · Science
Science: which chapter carries how many marks
How many marks and questions each chapter carried a year in CBSE’s 36 real papers of 2023–2026 — counted, not guessed. Start where the marks are.
| # | Chapter | Marks/yr | Qs/yr |
|---|---|---|---|
| 1 | 5. Life Processes | 8.4 | 4.6 |
| 2 | 11. Electricity | 7.6 | 3.1 |
| 3 | 9. Light – Reflection and Refraction | 7.1 | 2.7 |
| 4 | 7. How do Organisms Reproduce? | 6.8 | 2.8 |
| 5 | 2. Acids, Bases and Salts | 6.6 | 3.5 |
| 6 | 4. Carbon and its Compounds | 6.4 | 2.4 |
| 7 | 3. Metals and Non-metals | 6.2 | 3.1 |
| 8 | 1. Chemical Reactions and Equations | 5.7 | 3.6 |
| 9 | 6. Control and Coordination | 5.4 | 2.6 |
| 10 | 12. Magnetic Effects of Electric Current | 5.3 | 2.5 |
| 11 | 10. The Human Eye and the Colourful World | 5.0 | 2.6 |
| 12 | 13. Our Environment | 4.9 | 2.9 |
| 13 | 8. Heredity | 4.5 | 2.4 |
Average = total marks of the chapter’s questions over those years ÷ the years (one of a choice counted).
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