What characterizes photochemical smog?

What characterizes photochemical smog?

• A. It is produced by volcanic eruptions
• B. It forms from reactions with sunlight and specific pollutants
• C. It is caused solely by industrial waste
• D. It consists exclusively of carbon monoxide

Answer: (B)

Photochemical smog is characterized by its formation through chemical reactions involving sunlight and specific pollutants, primarily nitrogen oxides and volatile organic compounds (VOCs). When these pollutants are exposed to sunlight, they undergo a series of photochemical reactions, leading to the production of secondary pollutants like ozone at ground level, as well as other compounds that contribute to the smog's characteristic brownish color and harmful effects on health. The process is dependent on sunlight, which acts as the energy source that facilitates these reactions. This is why the presence of sunlight is crucial in the development of photochemical smog, distinguishing it from other types of air pollution that may not require sunlight for their formation.

Photochemical smog is characterized by its formation through chemical reactions involving sunlight and specific pollutants, primarily nitrogen oxides and volatile organic compounds (VOCs). When these pollutants are exposed to sunlight, they undergo a series of photochemical reactions, leading to the production of secondary pollutants like ozone at ground level, as well as other compounds that contribute to the smog's characteristic brownish color and harmful effects on health.

The process is dependent on sunlight, which acts as the energy source that facilitates these reactions. This is why the presence of sunlight is crucial in the development of photochemical smog, distinguishing it from other types of air pollution that may not require sunlight for their formation.