Question

plzz tell me the answer of this questions fast in short.

Answer 1

This is due to the fact that when water vapours in our surrounding comes in contact with the ice which is kept in a bottle the water vapours cool down by the process of condensation and form water droplets in the surface of bottle

Answer 2

When water vapour in the air comes into contact with glass, it's molecules slow down and get closer together. When that happens, the gaseous water vapor turns back into liquid water droplets.. that's condensation.