Photochemical Smog Product — UPSC Prelims PYQ 2003
Which one of the following is produced during the formation of photochemical smog?
- Hydrocarbons
- Nitrogen Oxides
- Ozone
- Methane
Explanation
Option (c) is correct
- Photochemical smog is also known as summer smog or Los Angeles smog. It occurs most prominently in urban areas with high vehicular emissions. It forms when nitrogen oxides and volatile organic compounds react together in the presence of sunlight to form ozone (a secondary pollutant). The resulting smog causes a light brownish colouration of the atmosphere, reduced visibility, plant damage, irritation of the eyes, and respiratory distress.
Answer: (c) Ozone
