What role do sulphur dioxide and nitrogen oxides play in acid rain?
Answer and explanation
Correct answer: They can combine with water to form acids
Sulphur dioxide and nitrogen oxides are acidic pollutants released mainly by combustion and industrial processes. In the atmosphere, they undergo oxidation and react with water to form acids such as sulphuric acid, sulphurous acid, nitric acid, or nitrous acid. These reactions increase hydrogen-ion concentration and lower the pH of rainwater. They do not make rain basic or merely change its colour. Therefore, option A correctly explains acid rain.
Frequently asked questions
What is the correct answer to this question?
They can combine with water to form acids
Why is this the correct answer?
Sulphur dioxide and nitrogen oxides are acidic pollutants released mainly by combustion and industrial processes. In the atmosphere, they undergo oxidation and react with water to form acids such as sulphuric acid, sulphurous acid, nitric acid, or nitrous acid. These reactions increase hydrogen-ion concentration and lower the pH of rainwater. They do not make rain basic or merely change its colour. Therefore, option A correctly explains acid rain.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
