Which are the primary constituents of photochemical smog?

Question

Which are the primary constituents of photochemical smog? (A) SO 2 and CO (B) NO 2 and hydrocarbons (C) CO 2 and NO 2 (D) Hydrocarbons and CFCs

Tardigrade Admin · Accepted Answer

The photochemical reaction is caused by absorption of energy in the form of light. The word smog is formed of smoke and fog. Photochemical smog is the major contributor to air pollution and is composed of primary and secondary pollutants. Primary being the nitrogen oxides and volatile organic compounds. Unsaturated hydrocarbons are those that have double or triple covalent bonds between adjacent carbon atoms. e.g., Ethylene

(C_{2} H_{4})

. Gasoline and natural gas are major sources of unsaturated hydrocarbon. Butadiene, benzene are some hydrocarbons that are lethal to human health and have the potential to cause cancer.
Hence, the correct answer is '

N O_{2}

and unsaturated hydrocarbons'.

Q. Which are the primary constituents of photochemical smog?

$S O_{2}$ and $CO$

$N O_{2}$ and hydrocarbons

$C O_{2}$ and $N O_{2}$

Hydrocarbons and $CFC s$

Q. Which are the primary constituents of photochemical smog?

SO2​ and CO

NO2​ and hydrocarbons

CO2​ and NO2​

Hydrocarbons and CFCs

$S O_{2}$ and $CO$

$N O_{2}$ and hydrocarbons

$C O_{2}$ and $N O_{2}$

Hydrocarbons and $CFC s$