Question

Boojho wants to separate the following materials as combustible and non-combustible can you help him

charcoal, chalk, stone, iron rod, copper coin, straw, cardboard, glass, paper and wood.

Answer 1

Combustible substances:

• Those substances which undergo combustion or burn are called combustible substances.
• For example Paper, cloth, cooking gas (LPG), wood, charcoal, etc.

Non-Combustible substances:

• Those substances which do not undergo combustion are called Non-combustible substances.
• For example Stone, bricks, soil, sand, water, iron nails, etc.

Solution:

Combustible substances — charcoal, straw, cardboard, paper, candlewood,

Non-combustible substances — chalk, stone, iron rod, copper coin, glass.