Differentiate between reversible and irreversible changes

Reversible changes

Irreversible changes

1. A substance can return to its original state.

1. A substance cannot return to its original state.

2. The chemical properties of the substance do not change.

2. The chemical properties of the substance change.

3. Most physical changes are reversible changes

3. All chemical changes are irreversible changes

4. For example- a balloon changing its size, shape on blowing air into it, water changing into ice on cooling, wax changing into liquid on heating, etc.

4.  For example- milk changes into curd, iron changes to rust, burning of paper, cooking of food, etc .