Question

why burning of coal is considered as reversible change ?​

Answer 1

Answer:

I think your question is wrong because burning of coal is an irreversible change .

It gives off ash as residue .

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Answer 2

Burning is a non-reversible chemical change. When you burn wood, the carbon in the wood reacts with oxygen in the air to create ash and smoke, and energy in the form of light and heat. This is a permanent change that cannot be undone – you cannot turn ashes back into wood.