alleryWhy does evaporation act as a natural water purifier?
AIt leaves salts and particles behind
BIt adds extra minerals to the water
CIt cools the water below freezing
DIt mixes the water with fresh air
Answer & Solution
Correct answer: A. It leaves salts and particles behind
1. When water evaporates, only water molecules rise as vapour.
2. Salts and other particles stay behind, so the vapour is purified.
3. Adding minerals, freezing or mixing with air do not purify it.
_Source: Wikipedia, Water cycle, lead section_
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