Question

The oxides of nitrogen and sulfur, when mixed with water in the air, are the chief components of acid rain.

• A. True
• B. False
• C. Either
• D. Neither

Answer 1

The correct option is A True

When the pH of rain is below 5.2, it is called acid rain. It occurs when oxides of nitrogen and sulfur react with water in the atmosphere and form nitric acid and sulfuric acid respectively. These acids then come down along with rain and make it acidic. The reactions of formation of nitric acid and sulfuric acid in the atmosphere are as follows:

SO₂ + O₂ ---> SO₃

SO₃ + H₂O ---> H₂SO₄

NO + [O] ---> N₂O₅

N₂O₅ + H20 ---> HNO₃

Hence, the statement given in the question is correct.

So, the correct answer is 'True'.