Question

Which of the following is precursors of photochemical smog?

• A. $N{O}_2$ and Hydrocarbon
• B. $P_2{O}_5$ and HydrocarbonP2O5
• C. Ethanol and $N{O}_2$
• D. Methanol and $Si{O}_2$

Answer 1

The correct option is A $N{O}_2$ and Hydrocarbon

1. Photochemical smogis composed of primary and secondary pollutants.
2. Primary pollutants, which include nitrogen oxides and volatileorganic compounds are introduced into theatmosphere via vehicularemissions and industrial processes.
3. Secondary pollutants, likeozone, result from the reaction of primary pollutants with ultraviolet light.