Question

Photochemical smog differs from industrial smog in that it ________.

Answer 1

Photochemical smog uniquely requires sunlight to form and is a result of a chemical reaction between nitrogen oxides, VOCs, and sunlight, leading to secondary pollutants like ozone, unlike industrial smog which mainly consists of primary pollutants.

Step-by-step explanation:

Photochemical smog differs from industrial smog in a significant way. While both are unhealthy mixtures of pollutants, photochemical smog is unique because it requires sunlight to form. This type of smog develops when nitrogen oxides and volatile organic compounds (VOCs) mix together in the presence of sunlight, leading to a chemical reaction that produces secondary pollutants such as ozone. This reaction typically happens over urban areas during the warmer months. Industrial smog, on the other hand, primarily consists of primary pollutants like sulfur dioxide and particulate matter, often containing large quantities of soot and carbon monoxide from the burning of fossil fuels such as coal.

Therefore, the correct answer to the question is option B): is formed only in the presence of sunlight. Catalytic converters and green chemistry practices are important in reducing emissions that contribute to photochemical smog, which is especially harmful to vulnerable populations like seniors, children, and people with lung conditions.

Answer 2

It is formed only in the presence of sunlight

Step-by-step explanation:

Photochemical smog is a type of smog produced when there is a reaction between ultraviolet light from the sunlight and nitrogen oxides in the atmosphere. This is seen as a brown haze, and is most prominent during the morning and afternoon, especially in heavily populated, warm cities.