Which of the following can be reversed?

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Melting of wax

Burning of candle

Solidification of melted wax

Both 1 and 3

answer is D.

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Detailed Solution

●        If we take melted wax and cool it, it will convert back to its original state.
●        Wax melting is reversible.
●        Once the wax has evaporated and converted to gaseous form, the burning of a candle cannot be reversed. It is impossible to solidify and turn it into a candle structure. The act of lighting a candle is irreversible.
●        When a candle burns, its size shrinks and cannot be restored to its former size.The reduction in candle size during burning is irreversible.
●        We can heat the solidified form of wax to return it to its original state.It is possible to reverse the solidification of melting wax.

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