Burning of a Candle is a Chemical Change Whereas the Melting of a Candle is a physical Change Why

Answer: The phenomena of candle burning involves both physical and chemical changes. When a candle is lit, the oxygen in the air reacts and carbon dioxide is produced. CO₂ is generated as a new substance. 

As a result, it’s a chemical change. There is no new substance generated when the candle melts, and the molten wax may be solidified and converted into a candle again, making it a reversible transformation. As a result, it is possible to say that the alteration is physical.