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Question

Melting of wax is a/an _________ change , while burning of a candle is a/an _________ change.

A
reversible, reversible
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B
reversible, irreversible
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C
irreversible, reversible
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D
irreversible, irreversible
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Solution

The correct option is B reversible, irreversible
When we burn a candle the melted wax can be solidified. However, the wick of the candle once burnt cannot be regained or reproduced. Hence, the burning of a candle is an irreversible change as we can use the molten wax to make the candle again(after solidifying) however we will require a new wick.

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