Hamad stated that nitrogen gas is noncombustible so is water vapour. if both nitrogen and water are in gaseous state then why the term gas and vapour were used by hamad?

Unlike clouds, fog, or mist which are simply suspended particles of liquid water in the air, water vapour itself cannot be seen because it is in gaseous form. Water vapour in the atmosphere is often below its boiling point. When water is boiled the water evaporates much faster and makes steam.

Explanation:

Unlike clouds, fog, or mist which are simply suspended particles of liquid water in the air, water vapour itself cannot be seen because it is in gaseous form. Water vapour in the atmosphere is often below its boiling point. When water is boiled the water evaporates much faster and makes steam.

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clouds form

solid ice forms on leaves.

water droplets form on grass.