Question

Classify the following as a physical or a chemical change.​

1. Drying of wet clothes​
2. Burning of coal​
3. Boiling of water​
4. Butter getting rancid​

Answer 1

• Physical changes are generally temporary and reversible. During a physical change, we see that there is no change in chemical composition.
• Chemical changes are mostly permanent and irreversible unlike physical changes. During a chemical change, we see that there is a change in chemical composition.

Hence, the classification will be as follows:

Physical change	Chemical Change
Drying of wet clothes​	Burning of coal
Boiling of water​	Butter getting rancid​