A) CO which is major pollutant resulting from the combustion of fuels in automobiles plays a major role in photochemical smog
B) Classical smog has an oxidizing character while the photochemical smog is reducing in character
C) Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours
D) During formation of smog the level of ozone in the atmosphere goes down
E) Classical smog is good for health but not photochemical smog
Correct Answer: D
Solution :
During formation of smog the level of ozone in the atmosphere goes down \[NO+{{O}_{3}}\xrightarrow[{}]{hv}N{{O}_{2}}+{{O}_{2}}\] In the atmosphere - the organic compounds rapidly react with\[{{O}_{3}},N{{O}_{2}}\]and free radicals like\[H{{O}^{\bullet }},HO{{O}^{\bullet }}\]etc.
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