Question

Explain physical and chemical changes with examples. [3 MARKS]

Answer 1

Physical change definition: 1 Mark
Chemical change definition: 1 Mark
Examples: 1 Mark

Physical changes are the changes where the physical property of the substance varies without any formation of new products. These changes are reversible and the products are identical to the reactants.

Examples: Melting of ice, melting of wax.

Chemical changes are the changes where the chemical property of the substance varies with the formation of new products. These changes are irreversible and the products are not identical to the reactants.

Examples: Formation of curd from milk, rusting of iron.