GENERAL KNOWLEDGE

Detailed explanation-1: -Among the folllowing the primary pollutant is carbon monoxide.

Detailed explanation-2: -Hydroxyl and ozone are the most abundant tropospheric oxidants, but chlorine atoms are much more reactive and can oxidize functional groups or whole molecules that are resistant to the weaker common oxidants. This can increase the formation of harmful secondary pollutants including particulate matter (PM) and ozone.

Detailed explanation-3: -Primary air pollutants: Pollutants that are formed and emitted directly from particular sources. Examples are particulates, carbon monoxide, nitrogen oxide, and sulfur oxide.

Detailed explanation-4: -Carbon dioxide is one of the main pollutants with regard to air pollution. It is a primary pollutant, which means it is emitted into the environment directly by human and natural sources. It is a greenhouse gas, which is the main reason for rising temperatures and global warming.

Detailed explanation-5: -A primary pollutant is an air pollutant emitted directly from a source e.g., carbon monoxide (CO), oxides of nitrogen (NOx, NO), sulfur oxides (SOx), SO2, volatile organic compounds (VOCs) and particulate matter (dust, ash, salt particles).