CBSE Class 10 Science Important Questions 2026-27
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Science
CBSE Class 10 Science important questions, 2026-27
These are not guesses. We counted the marks of every chapter across 21 real CBSE board papers (2023 to 2026) and found the questions that were asked again in a later year. Use them to decide where to spend your time first.
A question that came before is not a promise it will come again; the paper changes every year. This is a guide to what the board has valued, from the papers themselves.
Chapters by marks in past board papers
- 1. Life Processes10% of all marks · about 8.4 marks a paper
- 2. Electricity10% of all marks · about 8.1 marks a paper
- 3. Light – Reflection and Refraction9% of all marks · about 7.6 marks a paper
- 4. How do Organisms Reproduce?8% of all marks · about 6.7 marks a paper
- 5. Acids, Bases and Salts8% of all marks · about 6.6 marks a paper
- 6. Metals and Non-metals8% of all marks · about 6.5 marks a paper
- 7. Carbon and its Compounds8% of all marks · about 6.2 marks a paper
- 8. Chemical Reactions and Equations7% of all marks · about 5.8 marks a paper
- 9. Control and Coordination7% of all marks · about 5.7 marks a paper
- 10. Magnetic Effects of Electric Current6% of all marks · about 5.1 marks a paper
- 11. Our Environment6% of all marks · about 4.9 marks a paper
- 12. Heredity6% of all marks · about 4.8 marks a paper
Questions the board asked again
Same question, in two or more different years. Each one links to its solved page where we have one.
Asked in 2023, 2024, 2026 · 3 marks · Control and Coordination
Give reasons for the following: