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how will you demonstrate that water vapour are present in air

Asked by ashwinivg 31st August 2008, 12:07 PM
Answered by Expert

The presence of water vapour in the air is shown by allowing white anhydrous copper sulphate to be exposed to damp air. After some time, the white substance becomes blue due to the water vapour in the air.

Answered by Expert 7th September 2008, 8:39 AM
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