Class 8 – Chemistry

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CLASS 8 – CHEMISTRY

Unit 1. Structure Of Atoms

Introduction, Atoms As Building Blocks of Matter, Model of an Atom, Structure of an Atom, Theories of Atomic Structure, Atomic Theory of Matter, Rutherford’s Model of Atom, Electron, Proton, Neutron, Atomic Number and Mass Number, Isotopes, Valance Electrons and Valency, Valency and Oxidation State, Formation of Ions, Formula of Compounds, Chemical Equations, Summary

Unit 2. Carbon – A Special Element

Introduction, Carbon and its Occurrence, Allotropy, Allotropic Forms of Carbon, Structure of Diamond, Structure of Graphite, Difference Between Diamond And Graphite, Diamond and Graphite Mines in India, Compounds Of Hydrogen, Carbon and Oxygen, Carbon Monoxide, Carbon Dioxide, Hydrocarbons, Carbon Cycle, Common Carbonates and Bicarbonates, Methane, Summary

Unit 3. Chemical Transformation of Substances

Introduction, Purification of Substances, Characterization of Substances, Chemical Change, Chemical Reaction, Characteristics of Chemical Reactions, Types of Chemical Reaction, Oxidation and Reduction Reaction, Summary

Unit 4. Metals And Non Metals

Introduction, Characteristics of Metals And Non Metals, Occurrence of Metals, Metallurgical Process, Physical Properties of Metals, Chemical Properties of Metals And Non Metals, Uses of Metals, Reactivity of Metal, Comparison of Metals And Nonmetals, Noble Metals, Uses of Common Metals And Common Nonmetals, Alloys, Alloys of Aluminium, Alloys of Copper, Alloys of Iron, Corrosion, Prevention of Corrosion, Summary

Unit 5. Pollution of Air and Water

Introduction, Atmosphere, Different Layers of Atmosphere, Air is a Mixture, Composition of Air, Methods of Separation of Components of Air, Atmospheric Pressure, Types of Barometer, Nitrogen and Its Uses, The Nitrogen Cycle, Fixation of Nitrogen, Oxygen, Laboratory Preparation of Oxygen, General Methods of Preparation of Oxygen, Physical Properties of Oxygen, Chemical Properties of Oxygen, Uses of Oxygen, Oxidation And Reduction, Pollution, Air Pollution, Causes of Air Pollution, Sources of Air Pollution, Effects of Air Pollution, Effects of Air Pollution on Human Beings, Prevention of Air Pollution, Radioactive Pollution, Water Pollution, Prevention of Water Pollution, Water Treatment, Summary

Unit 6. Synthatic Fibers

Introduction, Fibres, Types of Natural, Synthetic Fibres, Summary

Unit 7. Coal and petroleum

Introduction, Fossil Fuels, Coal, Petroleum, Refining of Petroleum, Natural Gas, Summary

Unit 8. Chemical Effects of Electric Current

Introduction, Pure Substances,   Ions, Cations, Anions, Electroplating, Summary