Class 8 Syllabus


  • Main postulates of kinetic molecular theory of matter.
  • Explanation of change of state of the matter on the basis of inter particle space and inter particle attraction and collision.
  • Law of conservation of mass.

Physical and Chemical Changes

  • Revise and review the topic on Physical and Chemical Changes taught in earlier classes.
  • Physical and Chemical changes – Classification with examples.

Elements, Compounds and Mixtures

  • Revision of Elements, Compounds and Mixtures taught in earlier classes.
  • Elements, compounds and mixture – a brief explanation.
  • Separation of the components of a mixture.
  • Emphasis on the principle of separation.

Atomic Structure

  • Fundamental subatomic particles present in an atom: electrons, protons, neutrons.
  • Nucleus and extra nuclear parts.
  • Atomic number and mass number.

Language of Chemistry

  • Symbols of elements.
  • Formulae of compounds.
  • Chemical equations
  • Law of conservation of mass.
  • Balancing simple equations.
  • Relate the law to the balancing of simple equations.
  • Information gathered from a chemical equation.
  • Limitations of a chemical equation: Catalyst, conditions for the reaction, state of the reactants and products, nature of the chemical reaction are not gathered from the equation.

Chemical Reactions

  • Types of reactions:
    • Combination
    • Decomposition
    • Displacement
    • Double displacement.
  • Reactivity series:
  • Predict the reactivity of metals
  • Endothermic and exothermic processes/ reactions.
  • Neutralization reaction.
  • Decomposition reactions to form Oxides.
  • Classification of oxides:
    • Acidic
    • Basic
    • Amphoteric
    • Neutral


  • Preparation of hydrogen, from water – electrolysis (Introduction to terms electrode, electrolyte, electrolysis – detailed process not required).
  • Preparation of hydrogen in the laboratory.
  • Preference of zinc as the metal to be used (with reasons).
  • Choice of dilute acids (other than dil. nitric acid).
  • Bosch’s process.
  • Properties and uses of hydrogen.
  • Oxidation and Reduction.


  • Dissolution of salts in water – meaning and explanation.
  • Universal solvent – meaning.
  • Solutions, suspensions, colloids.
  • Differentiate unsaturated/saturated and supersaturated solutions.
  • Suspensions and colloids.
  • Water of crystallisation.
  • Hydrated and Anhydrous substances, hygroscopic.
  • Reactivity of metals with cold water, hot water and steam (with products formed).
  • Hard and soft water and methods of softening of hard water.
  • Disadvantage of using hard water.
  • Removing hardness of water by boiling or by treating with washing soda.

Carbon and its Compounds

  • Allotropes of Carbon – definition and explanation.
  • Crystalline and amorphous nature of allotropes of carbon.
  • Uses of diamond, graphite, coke, coal, soot.
  • Laboratory preparation, properties and uses of carbon dioxide
  • Physical properties of Carbon dioxide.
  • Chemical properties of Carbon Dioxide.
  • Acidic nature.
  • Reaction with lime water.
  • Properties and uses of Carbon monoxide.
  • Emphasis on use as reducing agent in the extraction of iron.
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