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Question

The following table classifies substances into combustible and non-combustible substances.
CombustibleNon-combustibleWoodGlassPaperCharcoal KeroseneStone Which of the above entries is not listed correctly?

A
Glass
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B
Kerosene
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C
Paper
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D
Charcoal
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Solution

The correct option is D Charcoal
Combustion is a chemical process in which a substance reacts with oxygen to generate heat. The substances that undergo combustion are called combustible substances and those that do not undergo combustion are called non-combustible substances.
Since, charcoal undergoes combustion, it is a combustible substance. Hence, it is listed incorrectly in the table.

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