A) \[{{\operatorname{O}}_{2}}\,and\,{{O}_{3}}\]
B) Oxides of sulphur and nitrogen
C) \[{{\operatorname{O}}_{2}} and {{N}_{2}}\]
D) \[{{\operatorname{O}}_{3}} and {{N}_{2}}\]
Correct Answer: C
Solution :
Smog - combination of smoke and fog. It is of two types: Sulphurous smog: It involves conversion of\[{{\operatorname{SO}}_{2}}\to S{{0}_{3}}\] Photochemical smog: It is formed when air contains \[{{\operatorname{NO}}_{2}}\]and hydrocarbons.
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