Question

Explain why respiration is a chemical change?

Answer 1

Chemical change is a process in which a new substance is formed.

• Respiration is irreversible process
• During respiration, oxygen convert into carbon-dioxide (a new substance is formed).
• During respiration, there is change in their chemical composition.
• During respiration , absorption and evolution of energy takes place.

These are characteristics of chemical reaction. Hence, respiration is a chemical reaction.