Question

What is the physical state of water at— 
(a) 25°C 
(b) 0°C
(c) 100°C ?

Answer 1

At zero °C temperature water (liquid) get starts to convert into its solid form (ice) and at 100°C temperature water (liquid) starts to change into water vapours. Between 0° to 100°C it remains in liquid state.

Thus,
(a) At 25°C, the water in Liquid state

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(b) At 0°C, the water in Solid or/and liquid state (Transition state)

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(c) At 100°C, the water in Liquid or/and gaseous state (Transition state)