Question

Choose the correct option regarding the gaseous state of matter.

• A. We inhale vapour of oxygen.
• B. We exhale vapour of carbon dioxide.
• C. Water vapour is produced by heating water at its boiling point.
• D. None of the above

Answer 1

The correct option is C Water vapour is produced by heating water at its boiling point.

Gas and vapour both come in the same state of matter that is the gaseous state. But the gases are those substances that are in the gaseous state at normal temperature and pressure while vapours are those substances that are not in the gaseous state at normal temperature and pressure.

e.g., Oxygen, ammonia, carbon dioxide, nitrogen, etc. are called gases while the gaseous state of water is called water vapour.