Question

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

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

Answer 1

The correct option is B

$4^{\circ }\text{C}$

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 $4^{\circ }\text{C}$.