Question

Most of the physical changes are reversible but some are irreversible. Explain the
statement with examples.

Answer 1

Answer:

In a reversible physical change, the original form of the matter can be restored. In an irreversible physical change, the original form cannot be restored. Melting ice and grinding wood into sawdust are examples of physical changes.

Answer 2

Answer:

Melting of ice is a physical change which can be reversible as if we freeze water again it can be changed to ice.

BUT when the paper is burnt it forms ash and again it cannot be changed to paper again.

So physical changes may be reversible and irreversible.