What is the physical state of water:

(a) at 0°C? (b) at 25°C

(c) at 100°C (d) at 250°C

(a) As 0°C is melting point of ice and freezing point of water, hence at this temperature, the physical state can be ice or water.

(b) In liquid state.

(c) As 100°C is the boiling point of water and condensing temperature of steam, hence physical state at this temperature can be Steam or water.

(d) In gas state.