ICSE Chemistry Class 09 Syllabus 2025-26

There is one paper of two hours duration of 80 marks and Internal Assessment of practical work carrying 20 marks. The paper is divided into two sections: Section I (40 marks) and Section II (40 marks).

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Section I (compulsory) contains short answer questions on the entire syllabus. Section II contains six questions. You are required to answer any four of these six questions.

1. The Language of Chemistry

(i) Symbol of an element; valency; formulae of radicals and formulae of compounds. Balancing of simple chemical equations.

(ii) Relative Atomic Masses (atomic weights) and Relative Molecular Masses (molecular weights): either - standard H atom or 1/12th of carbon 12 atom.

2. Chemical Changes and Reactions

(i) Types of chemical changes.

  • Direct combination
  • Decomposition
  • Displacement
  • Double decomposition

(The above to be taught with suitable chemical equations as examples).

(ii) Energy changes in a chemical change.

Exothermic and endothermic reactions with examples - evolution/absorption of heat, light and electricity.

3. Water

(i) Water as a universal solvent.

(ii) Hydrated and anhydrous substances.

(iii) Drying and Dehydrating Agents

(iv) Soft water and Hard water

4. Atomic Structure and Chemical bonding

(i) Structure of an Atom, mass number and atomic number, Isotopes and Octet Rule. 

(ii) Electrovalent and covalent bonding, structures of various compounds - orbit structure.

5. The Periodic Table

Dobereiner's Triads, Newland’s law of Octaves, Mendeleev’s contributions; Modern Periodic Law, the Modern Periodic Table. (Groups and periods)

6. Study of the First Element - Hydrogen

Position of the non-metal (Hydrogen) in the periodic table and general group characteristics with reference to valency electrons, burning, ion formation applied to the above-mentioned element.

(i) Hydrogen from: water, dilute acids and alkalis.

  • (a) Hydrogen from water
  • (b) Displacement of hydrogen from dilute acids
  • (c) Displacement of hydrogen from alkalis

(ii) The preparation and collection of hydrogen by a standard laboratory method other than electrolysis.

(iii) Industrial manufacture of hydrogen by Bosch process.

(iv) Oxidation and reduction reactions.

7. Study of Gas Laws

(i) The behaviour of gases under changes of temperature and pressure; explanation in terms of molecular motion (particles, atoms, molecules); Boyle's Law and Charles' Law; absolute zero; gas equation; simple relevant calculations.

(ii) Relationship between Kelvin scale and Celsius Scale of temperature; Standard temperature and pressure.

8. Atmospheric pollution

(a) Acid rain - composition, cause and its impact.

(b) Global warming: Greenhouse gases - their sources and ways of reducing their presence in the atmosphere.

(c) Ozone depletion