Photochemical smog occurs in warm, dry, and sunny climates. One of the following is not amongst the components of photochemical smog. Identify it:
1. NO2
2. O3
3. SO2
4. Unsaturated hydrocarbon
The smog which is formed in presence of sunlight is called photochemical smog. This occurs in the months of summer when NO2 and hydrocarbons are present in large amounts in atmosphere.
Concentration of O3, PAN, aldehydes and ketones builds up in the atmosphere.
