The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. Why?

Evaporation from the surface of a given liquid takes place more rapidly when

In cold weather, aquatic animals survive even when water at the top layer of the lake freezes into ice because –

The amount of heat required to change from liquid state to gaseous state without rise in its temperature is called:

What changes will the volume of water show if the temperature is lowered from 9° C to 3° C :

The temperature at which the vapour pressure of a liquid equals the atmospheric pressure is called its: