CBSE Class 12 Chemistry Important Questions 2026-27
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CBSE Class 12 Chemistry important questions, 2026-27
These are not guesses. We counted the marks of every chapter across 8 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. Electrochemistry13% of all marks · about 9.0 marks a paper
- 2. Aldehydes, Ketones and Carboxylic Acids11% of all marks · about 7.9 marks a paper
- 3. Solutions10% of all marks · about 7.0 marks a paper
- 4. Chemical Kinetics10% of all marks · about 7.0 marks a paper
- 5. The d- and f-Block Elements10% of all marks · about 7.0 marks a paper
- 6. Coordination Compounds10% of all marks · about 7.0 marks a paper
- 7. Biomolecules10% of all marks · about 7.0 marks a paper
- 8. Alcohols, Phenols and Ethers9% of all marks · about 6.3 marks a paper
- 9. Haloalkanes and Haloarenes9% of all marks · about 6.1 marks a paper
- 10. Amines9% of all marks · about 6.0 marks a paper
- 11. Chemistry in Everyday Life0% of all marks · about 0.1 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 2025, 2026 · 1 mark · Chemical Kinetics
Which of the following represents the fraction of molecules with energies equal to or greater than E_a ?