(a) At `25^(@)C`, water is in the liquid state (b) At `0^(@)C`, water can exist both in the solid state (ice) and in liquid state. This temperature represents the melting point of ice and freezing point of water (c ) At `100^(@)C`, water can be present both in the liquid and vapour states. This temperature corresponds to the boiling point of water and liquefication temperature of steam.
