Important Questions for Class 10 Science (Chapter-wise, Free)
Important questions and high-weightage chapters for Class 10 Science — chapter-wise key topics with free practice. CBSE/NCERT-aligned.
TL;DR: Important questions and high-weightage chapters for Class 10 Science — 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 10 Science. 24 chapters are covered below, 13 with past-year questions and 18 with objective practice — every link goes to a full set with worked solutions, free and without a login.
Where the Marks Are — Class 10 Science
Class 10 Science theory is 80 marks. Chemistry and Biology each carry 25 — half the paper.
| Unit | Marks | Focus on |
|---|---|---|
| Chemical Substances – Nature & Behaviour | 25 | Acids-bases-salts, metals/non-metals, carbon compounds, periodic table. |
| World of Living (Biology) | 25 | Life processes, control & coordination, reproduction, heredity. |
| Effects of Current | 13 | Electricity and magnetic effects — Ohm’s law numericals are guaranteed. |
| Natural Phenomena (Light & Eye) | 12 | Reflection, refraction, lenses, human eye — numericals + ray diagrams. |
| Natural Resources | 5 | Our environment and management — short, scoring. |
Full marks weightage for Class 10 Science →
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 |
|---|---|---|---|
| Acids and Bases (Case Study) | — | MCQs | — |
| Acids Bases and Salts | — | MCQs | Notes |
| Acids, Bases and Salts | PYQs | — | — |
| Carbon and its Compounds | PYQs | MCQs | Notes |
| Carbon Compounds | — | MCQs | — |
| Chemical Reactions and Equations | PYQs | — | Notes |
| Control and Coordination | — | — | Notes |
| Electricity | PYQs | MCQs | Notes |
| Electricity (Case Study) | — | MCQs | — |
| Gravitation Olympiad | — | MCQs | — |
| Heredity and Evolution | PYQs | MCQs | Notes |
| How do Organisms Reproduce | PYQs | MCQs | Notes |
| Human Eye and Colourful World | PYQs | — | — |
| Life Processes | PYQs | MCQs | Notes |
| Life Processes (Case Study) | — | MCQs | — |
| Light (Case Study) | — | MCQs | — |
| Light (Reflection and Refraction) | PYQs | — | — |
| Light Reflection and Refraction | — | MCQs | Notes |
| Magnetic Effects of Electric Current | PYQs | MCQs | Notes |
| Management of Natural Resources | PYQs | — | — |
| Metals and Non-metals | PYQs | MCQs | Notes |
| Our Environment | — | MCQs | Notes |
| Periodic Classification of Elements | PYQs | MCQs | Notes |
| The Human Eye and Colourful World | — | MCQs | 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 10 Science?
By marks, Chemical Substances – Nature & Behaviour (25), World of Living (Biology) (25), Effects of Current (13) 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 10 Science?
Yes — 13 of the 24 chapters listed have a past-year question set with worked solutions, linked in the table above.
All Class 10 subjects → · Full-length sample papers → · All previous-year questions →