Which among the following is the purest form of natural water?
Rainwater
Rainwater is the purest form of water whereas lake water and river water are the impure forms of water.
When water from various sources such as lakes, oceans ponds evaporate they leave behind the impurities and rise up in the sky. When these water vapours condense they are the purest form of water. Hence, rainwater is the purest form of water.