Question
Question: Which of the following is the primary precursor of photochemical smog ?...
Which of the following is the primary precursor of photochemical smog ?
A
Hydrocarbon
B
Ozone
C
PAN
D
Water vapour
Answer
Hydrocarbon
Explanation
Solution
Photo chemical smong result from the action of sunlight on unsaturated hydrocarbons and nitrogen oxides produced by automobiles and fuctories.