Answer the following in brief:
Why is burning of a candle considered both a physical and chemical change?
Burning of a candle is considered both a and a . The wax near the flame into a liquid and again on cooling. Since is formed during melting and solidification, this is a physical change. At the same time, the burns in the presence of oxygen, producing carbon dioxide, water vapour, heat and light. Since are formed, burning of the wax is a chemical change. Therefore, a burning candle shows both physical and chemical changes occurring simultaneously.