Question

At what temperature, the volume of a given amount of water is least for a given mass of water?

• A. $0^{\circ }C$
• B. $4^{\circ }C$
• C. $8^{\circ }C$
• D. ${12}^{\circ }C$

Answer 1

The correct option is B

$4^{\circ }C$

Generally, the volume of a given amount of a substance increases on heating.

However, water contracts when it is heated between $0^{\circ }\text{C}$ and $4^{\circ }\text{C}$. After $4^{\circ }\text{C}$ it again starts expanding.

Hence, the volume of a given amount of water is lowest at $4^{\circ }\text{C}$.