Which two substances are generally required for photochemical smog to occur?
A) the presence of phosphorous and nitrates
B) the presence of sunlight and phosphorous
C) the presence of sunlight and volatile organic compounds
D) the presence of phosphorous and nitrogen fixing bacteria

Question

Which two substances are generally required for photochemical smog to occur? 
A) the presence of phosphorous and nitrates 
B) the presence of sunlight and phosphorous 
C) the presence of sunlight and volatile organic compounds 
D) the presence of phosphorous and nitrogen fixing bacteria

Quizplus · Accepted Answer

Photochemical smog occurs when sunlight reacts with volatile organic compounds (VOCs) and nitrogen oxides (NOx) in the atmosphere. The reaction produces ground-level ozone and other pollutants. The presence of sunlight and VOCs are the two main requirements for the formation of photochemical smog. Phosphorus and nitrogen fixing bacteria do not contribute to the formation of photochemical smog.

Which Two Substances Are Generally Required for Photochemical Smog to Occur