CBSE Class 10 Science Important Questions
CBSE Class 10 Science important questions for the 2027 board exam: unit-wise marks for 2026-27, chapter-wise practice, preparation strategy and exam tips.
CBSE Class 10 Science for the 2027 board exam: which units carry the most marks, where to find chapter-wise important questions, and how to practise them.
Chapter-wise important questions with answers are on our CBSE Class 10 Science important questions page.
Unit-Wise Marks (2026-27)
| Unit | Marks |
|---|---|
| Chemical Substances — Nature and Behaviour | 25 |
| World of Living | 25 |
| Natural Phenomena (Light) | 12 |
| Effects of Current | 13 |
| Natural Resources (Our Environment) | 5 |
| Total (theory) | 80 |
Periodic Classification of Elements, Evolution, and the motor, electromagnetic induction and generator topics are assessed only by your school in 2026-27.
Source: CBSE Class 10 Science syllabus 2026-27 (cbseacademic.nic.in).
How to Practise Important Questions
- Start with the biggest units — they carry the most marks.
- Solve without looking at solutions first — this builds real exam confidence.
- Time yourself — practise under exam conditions.
- Mark questions you get wrong — revise these again 2–3 days before the exam.
Practise Science chapter-wise
Super Tutor has chapter-wise Science practice quizzes with answers for CBSE Class 10.
Try it freePreparation Strategy for CBSE Science
- Learn the key diagrams and practise labelling them neatly.
- Write balanced chemical equations with state symbols.
- Practise numericals from the textbook examples and exercises.
- Read the textbook line by line — activities and examples are fair game.
Exam Tips for CBSE Class 10 Science
- Read every question twice before starting — misreading costs marks.
- Attempt all questions — there is no negative marking in board exams.
- Show all steps — the marking scheme gives marks for steps, not just the final answer.
- Draw neat, labelled diagrams where the question asks for them.
- Keep 15 minutes for revision — check for silly mistakes and unanswered questions.
Unit-wise marks from the CBSE Class 10 Science syllabus 2026-27 (cbseacademic.nic.in).
Turn this into exam marks
Super Tutor gives you chapter summaries, revision notes, practice quizzes and an AI doubt solver matched to your board syllabus — so you revise smarter, not longer.
Start freeFrequently Asked Questions
Which chapters carry the most marks in CBSE Class 10 Science?
In the CBSE Class 10 Science syllabus 2026-27, the biggest units are Chemical Substances — Nature and Behaviour (25 marks), World of Living (25 marks), Effects of Current (13 marks). The full unit-wise split is in the table on this page.
Is NCERT enough for CBSE Class 10 Science?
NCERT textbooks are the prescribed books for CBSE, and board questions are built on them. Finish every NCERT example and exercise first, then practise sample papers and previous year papers.
How many days are enough to prepare for CBSE Class 10 Science?
With focused preparation, 30–45 days if you have already studied the syllabus once. Give Science 2–3 hours a day, and in the last week focus only on revision and past papers. Starting earlier is always better.
What are the most repeated questions in CBSE Science?
Certain question types come up regularly — definitions, numericals, chemical equations and diagram questions from the major chapters. Solving the last few years' papers and the latest sample or specimen paper shows you these patterns.