Question

how will you demonstrate that water vapour is present in air ?

Answer 1

This is how we demonstrate
Take ice cubes in a beaker and kept it open place for some time. You will notice that around the beaker there are some water droplets. This droplets formed are due to condensation ofwater vapor around the beaker. This confirmes the presence of water vapour in air.

Answer 2

Explanation:

a)Take out a bottle of soft drink from the refrigerator and place it on the table. b)Observe it for few minutes.

c)you will see small drops of water appearing on the outer surface of the bottle.

d) This is because water vapour present in the air condenses and forms small drops of water.

e) This activity proves that air contains water vapour.