Question

How can we say that air contains water vapour?

Answer 1

Air contains vapour can be proved we a chilled coke is take out of refridgerator and u see water droplets because condensation takes place
hope u get the ans

Answer 2

we can try it in winter season by exhaling our breathe through our mouth in the mirror. We will be able to see frosted water vapour. so we can say that air contains water vapour. hope this helps