Question

How can we say that burning of candle is a chemical change but the glowing
of bulb is a physical change?​

Answer 1

Answer:

During burning of candle new substance like carbon dioxide and water vapour is formed so it is a chemical change but in glowing of bulb no new substance is formed with different chemical properties so it is a physical change.

Answer 2

Answer:

Also, during burning of candle new substances like carbon dioxide gas and water vapour are produced, hence it is a chemical change as well. Glowing of an electric bulb is a physical change since no new substance with different properties is formed