Question

when we take out a bottle from fridge which is very cool we can see water droplets on its surface why explain?

Answer 1

Water droplets are formed because when water vapour comes in contact with cold surface of the bottle it condenses and water droplets appear.

Answer 2

When a water bottle is taken out of a fridge the water molecules present in the air hit the surface of the bottle, as a result those molecules settle on it and burst out.
Hence we find water droplets on the surface