Answer: Acid rain is a term used to describe rain that has been contaminated by acid that has been released into the sky by factories and other industrial processes. It is the impact to environment.When pollutants like sulphur dioxide and nitrogen oxides are released into the air.
These substances will travel very far into the sky, where they will combine and react with oxygen, water, and other elements to generate acid rain and other highly acidic pollutants.The pH of typical rain is around 5.6, making it somewhat acidic when it dissolves carbon dioxide forms a mild carbonic acid.
The pH range of acid rain is 4.2 to 4.5.