Question

Sir I want to know in detail about anomalous expansion of water and it's applications.

Thanks.

Answer 1

The density of ice is lower, and so it floats on water. This anomalous expansion of water is an abnormal property of water whereby it expands instead of contracting when the temperature goes from 4°C to 0°C, and it becomes less dense. ... Further, water and ice are not good conductors of heat.
also reffer
https://byjus.com/physics/properties-of-water-anomalous-expansion-of-water/amp/