what is acid rain ?
Answers
Answer:
Explanation:
Acid rain is mainly a mixture of sulphuric and nitric acids depending upon the relative quantities of oxides of sulfur and nitrogen emissions.
The formation of nitric acid and sulphuric acid which are secondary pollutants in the atmosphere lead such kind of pollution known as acid rain.
Also naturally present carbon dioxide in the atmosphere dissolves in rain. The formation of carbonic acid takes place,
- CO2 + H2O → H2CO3
Due to the above reaction, carbon dioxide dissolves in water until the solution becomes saturated. This results in the rainwater attaining an acidic pH of 5.6.
The purest form of rainwater reaches the earth as an acidic solution of pH 5.6. So we can say, acid rain is a rain whose pH is lower than 5.6
Answer:
when ph of rain water is less than 5.6 it is called acid rain