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CLASS 9 – CHEMISTRY with following topics explained in details: Unit 1. Matter in our surroundings Unit 2. Chemical Nature of Matter Unit 3. Atoms and Molecules Unit 4. Structure of Atom Unit 5. Chemical Bonding Unit 6. Classification of Elements Unit 7. Chemical reactions
CLASS 9 – CHEMISTRY
Unit 1. Matter in our surroundings
Introduction, Physical Nature of Matter, States of Matter, Interconversion of States of Matter, Effect of Temperature on Solid, Effect of Pressure, Evaporation, Summary
Unit 2. Chemical Nature of Matter
Introduction, Pure Substances, Classification of Matter As Element, Compound and Mixture, Comparison among Elements, Compounds and Mixtures, Solutions, Suspensions and Colloids, Suspensions, Colloids, Distinction among Solution, Colloidal Solution, and Suspension, Suspension of Components of a Mixture, Separation of Homogenious Mixture, Treatment of Water in Water-Works, Summary
Unit 3. Atoms and Molecules
Introduction, Laws of Chemical Combination, Postulates of Daltons Atomic Theory of Matter, Atoms, Molecule, Ions or Radicals, Chemical Formulae, Naming of Simple Compounds, Molecular Mass, Mole Concept, Empirical Formulae and Molecular Formulae, Mass Percentage of An Element from Molecular Formula, Determination of Formula of an Unknown Compound, Summary
Unit 4. Structure of Atom
Introduction, Electrons, Protons, Neutrons, Nucleus, Atomic Number and Mass Number, Thomson’s Model of Atom, Rutherford’s Model of Atom, Rutherford’s Experiment, Bohr’s Concept of Atom, Arrangement of Electrons in an Atom, Electronic Configuration of Some Elements, Valence Electrons, Isotopes, Radioactivity, X – Rays, Summary
Unit 5. Chemical Bonding
Introduction, Chemical Bond, Cause of Chemical Bonding, Ions, Cations, Anions, Types of Chemical Bonds, Electrovalent Bond or Ionic Bond, Covalent Bond, Properties of Ionic and Covalent Compounds, Polar and Non-Polar Covalent Compounds, Valency of Elements, Summary
Unit 6. Classification of Elements
Introduction, Dobereiner’s Triads, Mendeleev’s Periodic Table, Newland’s Law of Octaves, Modern Periodic Law, Modern Periodictble, Position of Hydrogen in the Periodic Table, Characteristics of Periods, Characteristics of Groups, Summary
Unit 7. Chemical reactions
Introduction, Chemical Formulae, Writing of Formulae of Molecular Compounds, Writing of Formulae of Ionic Compounds, Chemical Equations, Balanced and Unbalanced Chemical Equation, Ionic Equation, Types of Chemical Reactions, Oxidation and Reduction of Ions, Summary
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