The melting of wax of a candle is a physical change or a chemical change ?
The melting of wax of a candle is a physical change as no new substance is formed and it can be reversed.
We observe that some portion of wax (in a candle) melts and another portion of it is used in producing heat and light. Statement A: The melting of wax is a physical change Statement B: The burning of wax for the production of heat and light is a chemical change.
Burning of a candle is a chemical as well as physical change, why?
1. The physical change occurs when the wax of candle melts and it loses its shape 2. The chemical change is combustion of fuel in presence of oxygen. This leads to the production and emission of carbon dioxide from the flame 3. The burning of a candle is only a chemical change 4. The burning of a candle is only a physical change