Science (Physics, Chemistry And Biology)

This is a complete, free study companion for Science (Physics, Chemistry And Biology) — built around what the exam actually asks. The topics examiners repeat most are Lens ray diagrams and image formation, Ohm's law and electric circuit numericals, and Series and parallel resistance. The syllabus runs to 21 chapters. Below you'll find the full topic-frequency ranking, the exam paper pattern, every chapter, a step-by-step study plan, and the official downloads — everything in one place.

Everything here is free. We're an independent student resource, not the official ICSE & ISC body, so always confirm the current syllabus and exam dates on the official ICSE & ISC website before you rely on them.

Key information

Level: Class 10
Programme: CL10
Exam: Indian Certificate of Secondary Education
Conducted by: Council for the Indian School Certificate Examinations (CISCE)

Most important topics (by past-paper frequency)

#	Topic	Times asked	Likelihood
1	Lens ray diagrams and image formation	5	100%
2	Ohm's law and electric circuit numericals	5	100%
3	Series and parallel resistance	5	100%
4	Electron dot structures and chemical bonding	5	100%
5	Stoichiometry from balanced equations	5	100%
6	Electrolysis products at electrodes	5	100%
7	Organic nomenclature and structural formulae	5	100%
8	Organic reactions: addition, substitution, combustion, esterification	5	100%
9	Photosynthesis equation and experiments	5	100%
10	Human heart and double circulation	5	100%
11	Nephron and urine formation	5	100%
12	Mendelian monohybrid cross	5	100%

Based on how often each topic appeared in official previous-year question papers.

What you will study (chapters)

Chapter 1: Force, Work, Power and Energy
Chapter 2: Light
Chapter 3: Sound
Chapter 4: Electricity and Magnetism
Chapter 5: Heat
Chapter 6: Modern Physics
Chapter 7: Periodic Properties and Variations of Properties
Chapter 8: Chemical Bonding
Chapter 9: Study of Acids, Bases and Salts
Chapter 10: Analytical Chemistry
Chapter 11: Mole Concept and Stoichiometry
Chapter 12: Electrolysis
Chapter 13: Metallurgy
Chapter 14: Study of Compounds
Chapter 15: Organic Chemistry
Chapter 16: Basic Biology
Chapter 17: Plant Physiology
Chapter 18: Human Anatomy and Physiology
Chapter 19: Genetics
Chapter 20: Population
Chapter 21: Environmental Concerns and Pollution

Official textbook

Science (Physics, Chemistry And Biology) — official textbook / study material — Free download from the official source.

How to study Science (Physics, Chemistry And Biology) and score well

Start with the highest-frequency topics — In Science (Physics, Chemistry And Biology), Lens ray diagrams and image formation, Ohm's law and electric circuit numericals, Series and parallel resistance, and Electron dot structures and chemical bonding appear again and again in past papers. Master these first — they return the most marks for the time you put in.
Practise with previous-year papers — Solve the last 5–10 years of ICSE & ISC Science (Physics, Chemistry And Biology) papers under timed, exam-like conditions. Past papers show exactly which topics repeat and how questions are worded.
Revise actively, not passively — Write a one-page summary for each of the 21 chapters — key definitions, formulas and the points examiners reward — then re-test yourself instead of re-reading.
Mark your answers with the official scheme — After each practice paper, score yourself against the official marking scheme. It shows how marks are awarded step-by-step, so you learn to present answers the way examiners expect.

Exam tips: how to score higher in Science (Physics, Chemistry And Biology)

Where students lose marks: rushing the high-weightage questions, skipping the steps the marking scheme rewards, and saving easy sections for last. Read the whole paper first, attempt your strongest section early to bank marks, and always show your working.

Manage your time: split your time in proportion to the marks each section carries, keep a few minutes at the end to check, and never leave a question blank — a partial, structured answer still earns partial marks.

Frequently asked questions

What are the most important topics in Science (Physics, Chemistry And Biology)?

Based on past papers, the most frequently asked topics include Lens ray diagrams and image formation, Ohm's law and electric circuit numericals, Series and parallel resistance. The full ranked list with how often each appears is in the "Most important topics" section above.

Where can I download Science (Physics, Chemistry And Biology) previous-year question papers?

Official ICSE & ISC previous-year question papers are available on the official ICSE & ISC website. Open the Question Papers section for the direct link, plus the exam pattern and the topics that repeat most.

How can I prepare for Science (Physics, Chemistry And Biology) faster?

Start with the highest-frequency topics, learn the exam pattern so you know how each section is marked, and practise with past papers. A subject-aware study tutor can quiz you on exactly these topics.

A Gyani AI tutor trained on the Science (Physics, Chemistry And Biology) syllabus and past papers can quiz you on the most-asked topics and show you exactly what to revise.