Question

how will you demonstrate that air contains water vapour

Answer 1

if we take a bottle from refrigerator and place on the table and after some timesmall drop of water appering on the outer surface of bottle this is because water vapours present in air condenses and forms small drops of water this proves that air contains water vapours

Answer 2

Answer:

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.