Question
Question: The smog is essentially caused by the presence of :...
The smog is essentially caused by the presence of :
A
O2 and O3
B
O2 and N2
C
Oxides of sulphur and nitrogen
D
O3 and N2
Answer
Oxides of sulphur and nitrogen
Explanation
Solution
Photochemical smog is caused by oxides of sulphur and nitrogen.