a) Sugarcane’s juice is crystallised to form large crystals of sugar candy.

b) Process of depositing a layer of zinc on iron is called Galvanisation.

c) Souring of milk is a chemical change. It changes its odour and taste.

d) Carbon dioxide form calcium carbonate [CaCO₃] with lime water [Ca(OH)₂] and turns it milky.

e) During rusting, iron reacts with moist oxygen to form iron oxide, which is called rust.

f) Dissolving common salt in water is a physical change.