Question

What are reversible and irreversible changes? Give one example of each.

Answer 1

1. Reversible change: When a change in a substance can be reversed by changing the conditions, it is said to be a reversible change.
   Example: Melting of ghee or wax.

2. Irreversible change: When a substance cannot be brought back to its original state after a change, it is said to be an irreversible change.
   Example: Souring of milk.