Question

Nitrogen oxides produced from the emission of automobiles and power plants are the source of fine airborne particles which lead to

• A. Photochemical smog
• B. Dry air deposition
• C. Industrial smog
• D. Wet acid deposition

Answer 1

Answer: (A), (C)

The correct options are
A Photochemical smog
C Industrial smog

Nitrogen oxides are mainly produced by the combustion of fossil fuels in vehicles, especially diesel-powered vehicles and power plants. Just like sulphur oxides, nitrogen oxides can also combine with moisture to form nitric acid that can precipitate as acid rain. Photochemical smog is yet another environmental problem, which gets formed when nitrogen oxides and volatile organic compounds react in the presence of heat and sunlight.