Question

Classify the following as a physical or chemical change. State a reason for the choice.

Glow of a tube light.

Answer 1

• A physical change is a change in which no new substance is formed.
• A physical change is temporary and generally reversible.
• In a physical change, the chemical composition of the original substance is not altered.
• The glow of a tube light is a physical change because it can be reversed by switching off the current.