A chemical change involves change in chemical composition of the substance. On this bases the following change is chemical change
1. Burning of firewood. firewood is converted to CO2 and H2O, and the change cant be reversed
2. Rusting of iron is a chemical change. An iron oxide is formed from iron metal in presence of moisture and oxygen
3. Cooking of egg. Denaturation of protiens takes place.
All other changes are physical.
Your one thumbs up will help me lot. Thanks!
Get Answers For Free
Most questions answered within 1 hours.