Question

Explain differences and similarities between distilled water and rain water. (Observe the process of raining and distillation of salt water)

Answer 1

Distillation is a process which helps in selective evaporation and condensation of water. During distillation of water, water is boiled and the vapours are condensed to get pure water. It is free from salt, minerals and impurities.

When water becomes warm enough in the ocean or rivers, it evaporates as vapour into the air. After cooling the vapours (process looks to be similar like distillation), but when rain falls through the sky, it picks up whatever dust or particles present in the air including trace amounts of atmospheric gases, nitrates etc.