Question

Write any two characteristics of irreversible changes?
(OR)
What are physical changes? Give two examples?

Answer 1

Irreversible changes :-

• A substance cannot return to its original state.
• The chemical properties of the substance change.

Physical changes are changes affecting the form of a chemical substance, but not its chemical composition.

• An ice cube melting into water in your drink.
• Freezing water to make ice cubes.