Important Questions for Class 12 Chemistry (Chapter-wise, Free)
Important questions and high-weightage chapters for Class 12 Chemistry — chapter-wise key topics with free practice. CBSE/NCERT-aligned.
TL;DR: Important questions and high-weightage chapters for Class 12 Chemistry — chapter-wise key topics with free practice. CBSE/NCERT-aligned.
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
Chapter-wise important questions for Class 12 Chemistry. 8 chapters are covered below, 8 with past-year questions — every link goes to a full set with worked solutions, free and without a login.
Where the Marks Are — Class 12 Chemistry
Class 12 Chemistry theory is 70 marks, split across Physical, Inorganic and Organic. Organic chapters together dominate.
| Unit | Marks | Focus on |
|---|---|---|
| Organic (Haloalkanes → Amines, Biomolecules) | 28 | Reaction mechanisms and named reactions — the biggest block; practise conversions. |
| Electrochemistry & Chemical Kinetics | 16 | Nernst equation, rate laws — numerical-heavy and scoring. |
| d- & f-Block + Coordination Compounds | 14 | Inorganic — colour, magnetism, IUPAC naming, isomerism. |
| Solutions | 7 | Colligative properties numericals. |
| Biomolecules | 5 | Carbohydrates, proteins — pure recall marks. |
Full marks weightage for Class 12 Chemistry →
Chapter-wise Important Questions
Each row links to the material that exists for that chapter. A dash means we do not have that format for the chapter yet — it is not a broken link.
| Chapter | Past-year questions | Objective / MCQs | Revision notes |
|---|---|---|---|
| Alcohols Phenols and Ethers | PYQs | — | — |
| Aldehydes Ketones and Carboxylic Acids | PYQs | — | — |
| Amines | PYQs | — | — |
| Chemical Kinetics | PYQs | — | — |
| Coordination Compounds | PYQs | — | — |
| Electrochemistry | PYQs | — | Notes |
| Haloalkanes and Haloarenes | PYQs | — | — |
| Solutions | PYQs | — | Notes |
How to Work Through These
Take the chapters in order of marks, not in order of the textbook. For each one, read the revision notes to fix the ideas, then do the past-year questions under time — those show you the phrasing examiners actually use, which is usually narrower than the chapter itself. Objective questions are best left for the last week, when they become a fast way to find gaps rather than a way to learn.
A chapter is finished when you can produce the answer without looking, not when you have read the solution and agreed with it.
Frequently Asked Questions
Which chapters are most important for Class 12 Chemistry?
By marks, Organic (Haloalkanes → Amines, Biomolecules) (28), Electrochemistry & Chemical Kinetics (16), d- & f-Block + Coordination Compounds (14) carry the most in the board paper — see the weightage table above. Within those, the chapters listed below with past-year questions are the ones examiners have actually returned to.
How should I use important questions when revising?
Read the chapter first, then attempt its questions closed-book, and only then check the solutions. Working the questions before revising the chapter tells you what you do not know, which is useful; working them with the answers open tells you nothing at all.
Are previous year questions available for Class 12 Chemistry?
Yes — 8 of the 8 chapters listed have a past-year question set with worked solutions, linked in the table above.
All Class 12 subjects → · Full-length sample papers → · All previous-year questions →