Question

The density of water is not same at all temperatures because of its anomalous expansion. The density is maximum at:

• A. $0^{\circ }C$
• B. $4^{\circ }C$
• C. ${40}^{\circ }C$
• D. ${100}^{\circ }C$

Answer 1

The correct option is B $4^{\circ }C$

Density of water is maximum at $4^{\circ }C$.

On cooling from $4^{\circ }C$ to $0^{\circ }C$ it expands and on heating from $0^{\circ }C$ to $4^{\circ }C$ it contracts.

On heating above $4^{\circ }C$ it expands.