A) \[{{O}_{3}}\]
B) \[C{{O}_{2}}\]
C) \[S{{O}_{2}}\]
D) \[C{{H}_{4}}\]
Correct Answer: A
Solution :
Photochemical smog occurs at high temperature over cities and towns due to stull air, emission of nitrogen oxides and hydrocarbons from automobile exhausts and solar energy. Nitrogen dioxide splits into nitric oxide and nascent oxygen. Nascent oxygen combines with molecular oxygen to form ozone.
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