Describe an activity to show that air contain water vapour.
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when we are cooking when the heat pressures on the vessel the contained water in it gets evaporated and changes to water vapour and mixes in the air
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Take out a bottle of water(cold) from the refrigerator and place it on the table. You will see small drops of water appearing on the outer surface of the bottle. This is because water vapour present in the air condenses and forms small drops of water. This activity proves that air contains water vapour.
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