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(a) What are combustible substances? Name three combustible substances.
(b) What are non-combustible substances? Name three non-combustible substances.
(a) The substances which can burn are called combustible substances.
For example, Cloth, straw, cooking gas, etc.
(b) The substances which do not burn are called non-combustible substances.
For example, Stone, cement, glass, bricks, soil.
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