Question

The density of water is maximum at ____${}^{\circ }$ C.

• A. 4

Answer 1

The correct option is A 4
$\bullet$ Density of a substance is mass per unit volume.
$\bullet$ Water undergoes anomalous expansion i.e. it has unusual physical properties. When water cools, first it contracts in volume till 4° C then after that it starts expanding until it reaches 0° C.
$\bullet$ Hence, at 4°C the volume of water is minimum and thus, density is maximum.