GEOLOGY

Detailed explanation-1: -Examples of a secondary pollutant include ozone, which is formed when hydrocarbons (HC) and nitrogen oxides (NOx) combine in the presence of sunlight; NO2, which is formed as NO combines with oxygen in the air; and acid rain, which is formed when sulfur dioxide or nitrogen oxides react with water.

Detailed explanation-2: -Thus ozone is known as secondary air pollutant .

Detailed explanation-3: -3. Which of the following is called the secondary air pollutant? Sol: (b) Ozone.

Detailed explanation-4: -Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.