Which of these shows a reversible change and why?
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Melting of wax in (c), which on cooling, changes back to solid wax but burning candle (a) and an extinguished candle (b) show chemical irreversible change. Note: The burning of wax produces carbon dioxide gas water vapour and soot, which all go into air.
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A reversible change is a chemical change where no new materials are created and the original material can be recovered. Examples include freezing water to make ice or melting chocolate
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