Which of the following are components of photochemical smog?

Correct option is B

Photochemical smog primarily consists of ozone (O₃) and nitrogen dioxide (NO₂), along with other secondary pollutants formed by the reaction of sunlight with primary pollutants such as hydrocarbons and oxides of nitrogen.

Information Booster

1. Photochemical smog is also known as "Los Angeles Smog."
2. It is more prevalent in urban areas due to vehicular emissions.
3. High-intensity sunlight accelerates the formation of photochemical smog.
4. It causes respiratory issues and damages vegetation.
5. Ozone in smog is harmful at ground level but beneficial in the stratosphere.
6. Nitrogen dioxide gives the smog a brownish hue.

Additional Knowledge

• (a) Nitrogen dioxide and oxygen: Oxygen is not a primary component of smog but acts as a reactant.
• (b) Ozone and nitrogen dioxide: These are primary components of photochemical smog. Correct answer.
• (c) Carbon dioxide and chlorofluorocarbons: These are greenhouse gases and not directly involved in smog formation.
• (d) Chlorofluorocarbons and ozone: While CFCs affect the ozone layer, they are not smog components.