Question

(a) What are combustible substances ? Name three combustible substances.

(b) What are non-combustible substances ? Name three non-combustible substances.

Answer 1

Combustible substances: Those substances catch fire easily which undergoes combustion or burn are called combustible substances. (need the low temperature to burn).

For example Paper, cloth, cooking gas (LPG), CNG, Kerosene oil, wood, charcoal, etc.

Non-Combustible substances: Those substances which do not undergo combustion is called combustible substances.

For example Stone, cement, bricks, soil, sand, water, iron nails, etc.