Explanation
Among the options provided, one example of a secondary air pollutant is:
(A) Peroxy Acyl Nitrate.
Peroxy Acyl Nitrate (PAN) is considered a secondary air pollutant. It is formed in the atmosphere through the photochemical reaction of volatile organic compounds (VOCs) and nitrogen oxides (NOx) in the presence of sunlight. These precursor pollutants undergo a series of complex chemical reactions, leading to the formation of PAN.
PAN is a harmful air pollutant and is known to cause eye and respiratory irritation. It is a component of photochemical smog, which is often observed in urban areas with high levels of VOC and NOx emissions.
Carbon monoxide (B), carbon dioxide (C), and ammonia (D) are not classified as secondary air pollutants. Carbon monoxide is a primary pollutant produced from incomplete combustion of fossil fuels. Carbon dioxide is a naturally occurring greenhouse gas and a product of combustion processes. Ammonia is primarily emitted from agricultural activities and is considered a primary pollutant.
It is important to address both primary and secondary air pollutants to effectively manage and improve air quality. Implementing emission control measures, reducing precursor emissions, and promoting cleaner technologies can help reduce the formation of secondary air pollutants and mitigate their impacts on human health and the environment.
