What is the noxious cloud of smoke and fog caused by SO₂ which is formed by the reactions of automobile exhaust and sunlight?

Question

Quizplus · Accepted Answer

The term "noxious cloud of smoke and fog" suggests that this is a type of air pollution, and the fact that it is caused by the reactions of automobile exhaust and sunlight means that it is a secondary pollutant, formed through a chemical reaction rather than being directly emitted. "Automotive discharge" is not a commonly used term for this phenomenon. "Acid rain" is a different type of air pollution caused by emissions of sulfur dioxide and nitrogen oxides, which react with water in the atmosphere to form acids that can fall to the ground as precipitation. Therefore, the correct answer is E, photochemical smog.

What Is the Noxious Cloud of Smoke and Fog Caused