The presence of ozone in troposphere :
Show Hint
- protects us from greenhouse effect
- protects us from the UV radiation
- protects us from the X-ray radiation
- generates photochemical smog
The Correct Option is D
Solution and Explanation
In sunlight, \(\mathrm{NO_2 \to NO + O}\) and \(\mathrm{O + O_2 \to O_3}\). The ozone then reacts with hydrocarbons and NO to form PAN, aldehydes and other irritants, the components of photochemical smog.
So the presence of ozone in the troposphere generates photochemical smog; it does not protect from UV (that is the stratosphere) and ozone is itself a greenhouse gas rather than protecting from it.
Answer: (4) generates photochemical smog
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