Class IX

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Wk. 1 & 2

Chapter 1: Language of Chemistry

Symbols, valency, formula of radicals & compounds

Chemical equations

Relative atomic mass & molecular mass and percentage composition of compounds.

Wk. 3 & 4

Chapter 2: Chemical Reactions

Direct combination & decomposition.

Displacement & double decomposition

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Wk. 1 & 2

Chapter 2: Continued

Examples & observations of chemical reactions.

Exothermic & endothermic reactions

Photochemical & electrochemical reactions

Wk. 3 & 4

Chapter 3: Water

Water as universal solvent & saturated solution

Qualitative effect of temperature on solubility

Hydrated & anhydrous substances

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Wk. 1 & 2

Chapter 3 Continued

Efflorescence, deliquescence & hygroscopic substances- drying & dehydrating agents

Hard & soft water: Types & causes of hardness, removal of hardness, advantage & disadvantage of

hard & saft water.

Wk. 3 & 4

Chapter 4: Atomic Structure

Definition & constituents of an atom- electrons,

protons & neutrons, atomic no. & mass number.

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Wk. 1 & 2

Chapter 4: Continued

Electron distribution in the orbits & octet rule.

Reason for chemical activity of an atom.

Definition & examples of isotopes.

Wk. 3 & 4

Chemical Bonding

Definitions of electrovalent & covalent bonds.

Orbit structures of electrovalent compounds &

covalent molecules.

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Wk. 1 & 2

Chapter 5: The Periodic Table

Introduction of the periodic table.

Dobereiner’s triad and Newland’s law of octaves.

Mendeleev’s periodic law & Mendeleev’s periodic table.

Wk.3 & 4

Modern periodic law & modern periodic table

Alkali metals, alkaline earth metals, halogens & inert gases.

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Wk. 1 & 2

Chapter 6: Hydrogen

Position of hydrogen in the periodic table and general group characteristics

Hydrogen from water, dilute acid & alkali.

Laboratory preparation of hydrogen.

Wk.3 & 4

Bosch process.

Oxidation & reduction

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Wk. 1 & 2

Chapter 7: Study of Gas Laws

Boyle’s law & Charles’ law- statement, mathematical form and simple calculations.

Absolute zero & Kelvin temperature, STP.

Wk. 3 & 4

Gas equation and simple relevant calculations based on gas equation

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Wk. 1 & 2

Chapter 8: Atmospheric Pollution

Acid rain – composition, cause and its impact

Global warming – greenhouse gases- their sources and ways of reducing their presence in air ; Ozone depletion

Wk. 3 & 4

Chapter 9 Practical Chemistry

Action of heat on carbonates, nitrates, hydrated salts, NH4Cl, I2 and on ammonium dichromate

Action of dilute acid on carbonates, sulphites, sulphide & metal.

Flame test

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REVISION & MOCK TEST