Question

Kerosene stove involves both physical and chemical changes. Explain.

Answer 1

Burning of LPG in a gas stove involves both physical and chemical changes.
When LPG comes out of the cylinder it changes from liquid to gaseous state, which is physical change. Then the gas burns in the air which is a chemical change.
Another example is Lighting of candle. When a candle is lighted, the heat produced melts the wax. The molten wax rises up the wick of the candle and starts burning thereby producing light. Hence, melting of wax is physical change and burning of wax is chemical change.