Question

The formation of photochemical smog is a result of a series of reactions between chemicals in the atmosphere and light. Which of these events likely occurs first in the formation of photochemical smog?

Answer 1

Production of nitrogen oxides is the event which occurs first in the formation of photochemical smog.

Step-by-step explanation:

Photochemical smog is a type of smog which occurs when volatile gases such as nitrogen oxide react with the sunlight in the atmosphere. Due to this reaction, smog is formed which is brown in color. This nitrogen oxide gas is produced when the fossil fuel burns in the engines of vehicles. Nitrogen oxide is volatile gas which means it directly goes in the atmosphere and contribute in air pollution and global warming.