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ICSE Class 8 Chemistry : Choose Your Topic
Main postulates of kinetic molecular theory of matter
Explanation of change of state of the matter
Law of conservation of mass
Revision on Physical and Chemical Changes
Physical and Chemical changes – Classification with examples
Revision of Elements, Compounds and Mixtures
Elements, compounds and mixture – a brief explanation.
Separation of the components of a mixture
Emphasis on the principle of separation.
Fundamental subatomic particles in an atom: electrons, protons, neutrons
Nucleus and extra nuclear parts
Atomic number and mass number.
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
Types of reactions
Predict the reactivity of metals
Endothermic and exothermic processes/ reactions.
Decomposition reactions to form Oxides.
Classification of oxides
Preparation of hydrogen, from water – electrolysis
Preparation of hydrogen in the laboratory.
Preference of zinc as the metal to be used
Choice of dilute acids
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
Hard and soft water and methods of softening of hard water.
Disadvantage of using hard water.
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
harmful properties of Carbon monoxide when inhaled - Asphyxia.
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