Question

‘Melting of the candle is a reversible change whereas burning of a candle is an irreversible change’. Justify this statement.​

Answer 1

Explanation:

Solution: (a) Reversible changes are changes in a substance that can be reversed back to their original state. ... Freezing of water is a reversible change because frozen water can be melted on heating. Burning of a candle is an irreversible change because once the candle melts, the wax cannot be molded again.

Answer 2

Answer:

The burning of candle is an irreversible change as the burnt candle thread cannot be obtained. While the melting of the wax is a reversible change as the shape of the wax can be obtained by heating it.

Explanation:

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