Question

Which of the following can

be reverse​

Answer 1

Explanation:

An irreversible change is a permanent change that cannot be undone. Melting of wax is a reversible process. Since upon cooling, it changes back to solid wax. Similarly, Solidification of melted wax can be reversed which is the melting of wax.

Answer 2

Explanation:

melting of an ice can be reversed.

burning of candle is both physical and chemical change as when candle burns it melts forming wax which is physical change while burning of wax is as chemical change.