Question

Water has maximum density at
a) 0°C
b) 10 °Cc) 5°C
d) 4 °C

Answer 1

Water has maximum density at 4°C

Answer: Option (d)

Explanation:

Water unlike other liquids exhibits a peculiar phenomenon called the anomalous expansion of water. By this phenomenon water expands ‘instead of contracting’ when the ‘temperature falls’ from 4°C to 0°C. This expansion leads to a decrease in volume.

Density is the mass of a body per unit volume. Hence ‘density’ is inversely proportional to ‘volume’. The lesser the volume the greater the density. Hence at approximately four degrees Celsius water exhibits the highest density. At other temperatures it exhibits the regular density like other liquids.

Answer 2

Water has maximum density at 4°C

Explanation:

Density is the mass of a body per unit volume. Water reaches its maximum density at 3.98 °C (39.16 °F). This is because of a phenomenon called anomalous expansion of water. Water unlike other liquids, starts to expand when temperature falls from 4°C to 0°C. So, at approximately four degrees Celsius, water exhibits its maximum density. At other temperatures, it exhibits regular density like other liquids.