Chemistry Class 7 ICSE CISCE Topics and Syllabus

• Matter 
• Characteristics of Molecules of Matter 
• Composition of Matter 

• Definition of matter.
• The matter has mass and occupies space - Explanation.
• The composition of matter – the brief introduction

• Concept of Chemical Changes 
  • Meaning of Chemical Changes 
  • Characteristics of Chemical Changes 
  • Examples of Chemical Changes
  • Experiment: Burning of a magnesium ribbon in air and collection of magnesium oxide in a watch-glass
  • Experiment: Formation of hydrogen gas by the action of dilute sulphuric acid on zinc.
  • Experiment: When copper sulphate reacts with iron, two new substances, i.e., ferrous sulphate and copper are formed.
  • Experiment: When carbon dioxide is passed through lime water, calcium carbonate is formed, which makes lime water milky.
• Concept of Physical Changes 
  • Meaning of Physical Changes
  • Characteristics of Physical Changes
  • Examples of Physical Changes
• Change of State of Matter 
• Types of Change Involved When There is a Change of Energy. 

• Physical and chemical changes.
• Chemical change - formation of a new product with new properties.
• Differentiating between physical and chemical change.
• Classification as physical & chemical change.
• Types of change involved when there is a change of state of matter.
• Types of change involved when there is a change of energy.

• Concept of Elements, Compounds and Mixtures (Experimental Techniques) 
• Identification of Elements, and Compounds - Representation of Their Symbols and Formulae 
• Concept of Mixtures and Compounds 
• Difference Between Mixtures and Compounds on the Basis of the Chemical Composition of Constituents 
• Recall that a Mixture is Formed When Two Or More Substances Are Mixed in Any Proportion 
  • Recall that a mixture is formed when two or more substances are mixed in any proportion such that their particles are in intimate contact with one another without undergoing a chemical change.
• Concept of Mixture 
  • Mixture
  • General Properties of Mixtures
  • Examples of Mixtures
  • Types of mixture: Homogeneous mixture and Heterogeneous mixture
• Types of Mixtures - on the Basis of State: Solid-Solid;Solid-liquid;Liquid-liquid. 
• Separating the Components of a Mixture 
  • Evaporation Method 
    • Experiment to obtain coloured component (dye) from blue /black ink.
  • Distillation Method 
    • Experiment of Separation of two miscible liquids by distillation
  • Using a Separating Funnel Method 
    • Experiment to separate kerosene oil from water using a separating funnel
  • Sublimation Method 
    • Experiment of the separation of ammonium chloride and salt by sublimation
  • Distillation Method 
    • Experiment of Separation of two miscible liquids by distillation
  • Chromatography Method 
    • The experiment of Separation of dyes in black ink using chromatography.
• Principle Behind Each Separation Technique. 
• Concept of Paper Chromatography 
• Emphasis on the Principle of Separation 
• Separation of the Components of a Mixture 
• Concept of Elements, Compounds and Mixture 

Identification of elements, and compounds from the representation of their symbols and formulae.

Mixtures and compounds: difference between mixtures and compounds on the basis of the chemical composition of constituents.

Recall that a mixture is formed when two or more substances are mixed in any proportion such that
their particles are in intimate contact with one another without undergoing a chemical change.

Types of mixtures: -

• Homogeneous & Heterogeneous mixtures
• On the basis of State: Solid –solid;Solid-liquid;Liquid-liquid.

Separation techniques:

• evaporation
• distillation,
• use of separating funnel,
• sublimation,
• fractional distillation.

Examine the principle behind each separation technique.

Chromatography as a separation technique; Paper chromatography.

• Concept of Atom 
• Concept of Atoms, Molecules and Radicals 
• Concept of Independent Existence 
  • It is not capable of independent existence.
• Properties of an Element Depend Upon the Atoms Constituting It 
• Concept of Molecule 
• Concept of Radical 
  • A radical is a single atom of an element or a group of atoms of different elements behaving as single unit and with a charge on group.
• Atomicity of Elements and Compounds – Mono Atomic, Diatomic, Triatomic, Polyatomic 
• Elements in the Periodic Table with Their Names and Symbols 
  • Associate the first 20 elements in the periodic table with their names and symbols
• Concept of Valency 

Atoms, Molecules and Radicals

• An atom is the smallest particle of an element.
• It is not capable of independent existence.
• The properties of an element depend upon the atoms constituting it.
• A molecule is the smallest particle of an element or compound, capable of independent existence. It consists of one or more than one atom of the same or different elements.
•  A radical is a single atom of an element or a group of atoms of different elements behaving as single unit and with a charge on group.
• Atomicity (no. of atoms in an entity) of elements and compounds – mono atomic, diatomic, triatomic, polyatomic.
• Associate the first 20 elements in the periodic table with their names and symbols
• Valency is the combining capacity of an element or the number of hydrogen 0atoms with which it combines or replaces.

• Concept of Language of Chemistry 
• Concept of Chemical Reactions 
  • Chemical Reaction
  • Characteristics of Chemical Reaction
• Chemical Equations - Emphasize on the Observational Skills and the Names of Products Formed 
• Chemical Equation 
  • Chemical Equation
  • Word equation
  • Symbols of elements and their valencies
  • Writing a Chemical Equations

Chemical reactions

A chemical reaction may take place when two or more reactants come in contact with one another and transfer of energy takes place.

Characteristics of occurrence of a chemical reaction:
Change of:
 Colour
 State
 Smell
 Evolution of gas
 Precipitate formed
 Heat evolved / released

• Chemical Equations: Writing word equations for chemical reactions and emphasize on the observational skills and the names of products formed

Some examples of word equations for practice.

• Non Metals and Its Physical Properties 
• Difference Between Metals and Non-metals 
• Ways to Prevent Rusting (Oiling, Painting, Chrome Plating, Galvanization, Tinning) 
• Corrosion of Iron (Rusting) and Its Prevention 
  • Reaction of corrosion
  • Prevention by painting and galvanization
• Uses of Certain Metals (Iron, Gold, Copper, Aluminium, Zinc, Lead, Magnesium). 
• Concept of Metalloids - metals and non-metals – e.g. silicon, germanium,tungsten, antimony) 
  • elements that show the properties of both metals and non-metals – e.g. silicon, germanium,tungsten, antimony)
• Uses of Metalloids 
• Extraction of Metals from Ore 

• Metals, non-metals
• Properties
• Distinguish between metals and non-metals with the general properties (lustre,conduction of electricity, heat, malleability, ductility, sonority, melting point, boiling point, density, strength.)
• Classification of elements as metals & non-metals.
• Corrosion of iron (rusting); ways to prevent rusting (oiling, painting, chrome plating, galvanization, tinning) (avoiding contact with air and water vapour).
• Uses of certain metals (iron, gold, copper, aluminium, zinc, lead, magnesium).
• Metalloids: elements that show the properties of both metals and non-metals – e.g. silicon, germanium,tungsten, antimony); uses.

• Concept of Air and Atmosphere 
• Concept of Air - Mixture of Gases. 
• Composition of Air and Uses of Its Components. 
• Concept for Oxygen - Combustion. 
  • Oxygen is needed for combustion.
• Mass Change During Burning (Burning of Magnesium and Candle). 
• Equations for Reactions of Metals and Non-metals (S, C, P, Na, K, Ca, Mg) with O 
• Concept of Products Formed in Acid Rain 
• Effects of Acid Rain. 
• Concept of Air Quality 
• Study the Properties of Oxygen 
• Concept of Respiration and Combustion and Rusting 

• Air a mixture of gases.
• Composition of air and uses of its components.
• Oxygen is needed for combustion.
• Mass change during burning (burning of magnesium and candle).
• Word equations for reactions of metals and non-metals (S, C, P, Na, K, Ca, Mg) with O.
• Products formed in acid rain; effects of acid rain.
• Air quality.
• Study the properties of oxygen: (physical properties to include colour, odour).

Distinguish between:

• Respiration and combustion,
• Combustion and rusting.