Which of the following compounds is primarily responsible for the brown color of smog?

Question

Quizplus · Accepted Answer

Nitrogen oxides (NOx) are the primary compounds responsible for the brown color of smog. It is produced from the combustion of fossil fuels and is a major contributor to air pollution. CO, CO₂, and O₃ are not responsible for the brown color of smog. The presence of NOx is often used as an indicator of high levels of air pollution.

Which of the Following Compounds Is Primarily Responsible for the Brown