Which of these is/ are irreversible change/s?

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Melting of ice

Melting of wax

Boiling of water

Burning of wax

answer is D.

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Detailed Solution

Burning of wax is an irreversible change.
Irreversible changes are those changes which cannot be reversed in nature. The original substance cannot be obtained once a new substance is formed. The wax is being used up for burning, and this cannot be retained again. While burning, wax is combined with atmospheric oxygen and changes to carbon dioxide, heat, and light, a chemical change which is irreversible in nature.

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