Which one of the following does not involve a chemical reaction? (a) Digestion of food in our body (b) Process of respiration (c) Burning of candle wax when heated Melting of candle wax on heating
ChemistryClass 10ICSEAnswered 27 Mar 2026
Answer
Option (d) is the answer. Wax changes its physical state on heating but not the properties so it does not involve any chemical change but involves physical change