Question

What is known as triple point of water?

• A. When boiling point and freezing point of water become same
• B. When boiling point and freezing point of water become different
• C. When boiling point and freezing point of water become opposite
• D. None

Answer 1

The correct option is A When boiling point and freezing point of water become same

Triple point of water is defined as the temperature and pressure at which liquid water , solid ice and water vapour can coexist in a stable equilibrium . As , at triple point of water , both solid (ice) and vapour state are present so we can say that boiling point and freezing point become same .