Question

Give reason:​
(b) Burning of a candle is both a physical and a chemical change.​

Answer 1

Burning of a candle involves both physical and chemical changes. During burning, the wax melts. Here, the wax has changed from solid to liquid. This is a physical change. The wax near wick of the candle burns and gives new substances like carbon dioxide, carbon soot, water vapour, heat and light. This is a chemical change.​