Chemistry subject deals with a varitey of concepts. Children studying in class 8 ICSE syllabus needs to know the boundaries of the subject. Some of the important concepts that are covered under class 8 Chemistry includes; Matter, physical and chemical changes,elements,compounds,atomic structure,chemical reactions of materials like waterhydrogen and some gases. The section below provides the detailed syllabus for ICSE baord class8 chemistry.
Main postulates of kinetic molecular theory of matter.
Explanation of change of state of the matter on the basis of inter particle space and interparticle attraction and collision.
Law of conservation of mass.(statement and explanation with examples).
Physical and Chemical Changes
Revise and review the topic on matter taught in earlier classes.
Physical and Chemical changes – Classification with examples.
Elements, Compounds and Mixtures
Revision of Matter taught in earlier classes
Elements, compounds and mixture – a brief explanation.
Separation of the components of a mixture.
Emphasis on the principle of separation.
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 (from word 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 reactants and products, nature of the chemical reaction are not gathered from the equation.
Types of reactions:
In reactivity series metals are arranged in order of their reactivity.
The metal that displaces the metal ion from the solution is more reactive.
Predict the reactivity of metals.
Endothermic and exothermic processes/reactions.
Decomposition reactions to form Oxides.
Classification of oxides
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).
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.
Reaction with lime water.
Properties and uses of Carbon monoxide.
Emphasis on use as reducing agent in the extraction of iron.
Emphasize the harmful properties of Carbon monoxide when inhaled – Asphyxia.
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