ICSE Class 9 Chemistry: chapter-wise study guide

All 8 chapters of ICSE Class 9 Chemistry for the 2026-27 session. Each chapter page explains the ideas, gives tricks to remember them, shows where students lose marks, and links to practice.

8 chapters
16 topic pages

Start with the first chapter

Exam note: Class IX is a school examination: CISCE says the Class IX final examination is conducted internally by schools. The ICSE 2028 syllabus sets the Class IX Chemistry (Science Paper 2) paper at 80 marks and 2 hours, plus 20 marks of internal assessment of practical work; CISCE publishes no Class IX question-paper layout.

Chapters

1
The Language of Chemistry
- Balancing Chemical Equations, Relative Masses and Percentage Composition
- Valency, Radicals and Writing Chemical Formulae by Criss-Cross
2
Chemical Changes and Reactions
- Direct Combination and Decomposition Reactions: Equations, Observations and Masses
- Displacement, Double Decomposition and Energy Changes in Reactions
3
Water
- Hard and Soft Water: Causes, Removal of Hardness and Purifying Water
- Solutions, Solubility and Solubility Curves: Crystallisation Calculations
4
Atomic Structure and Chemical Bonding
- Electrovalent and Covalent Bonds: Electron Transfer, Sharing and Dot Structures
- Rutherford's and Bohr's Models, Electron Distribution and Isotopes
5
The Periodic Table
- Dobereiner's Triads, Newlands' Octaves, Mendeleev's Table and the Modern Periodic Law
- The Modern Periodic Table: Groups, Periods, Configurations and Families
6
Study of the First Element: Hydrogen
- Preparation of Hydrogen: Laboratory Method, Other Sources and the Bosch Process
- Oxidation, Reduction, Oxidising and Reducing Agents and Redox Reactions
7
Study of Gas Laws
- Boyle's Law: Pressure–Volume Relation, Graphs and Calculations
- Charles's Law, Kelvin Scale, the Gas Equation and S.T.P.
8
Atmospheric and Environmental Chemistry
- Acid Rain and Global Warming: Causes, Equations, Effects and Remedies
- Ozone Layer, Water Pollution and Minamata Disease

Syllabus source: CISCE ICSE 2028 Science (52) Chemistry syllabus (Classes IX and X), CISCE Regulations for ICSE Examination Year 2028