How will you demonstrate that water vapour is present in the air?

The presence of water vapour in the air can be demonstrated with the following experiment.

Take a steel tumbler and put crushed ice in it. Keep it aside undisturbed for 5 minutes. The drops of water will start appearing on the outer surface of the steel tumbler. The air around the steel tumbler contains water vapour in it and when it comes in contact with the cold ice, it condenses into water droplets.

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Updated on: 10-Oct-2022

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