One of the primary components of industrial smog is ____.

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Question restatement: One of the primary components of industrial smog is ____.

Option 1: mercury. Mercury is a toxic metal present in some industrial emissions and can be a pollutant, but it is not a primary component typically associated with classic industrial smog. The classic smog problem centers on sulfur compounds and particulates rather than mercury.

Option 2: lead. Lead is a harmful pollutant from certain industrial processes and uses, but it is not a defining main component of industrial smog. Industrial smog is more characteristically linked to sulfur compounds and particulates than to lead.

Option 3: sulfur dioxide (SO2). Sulfur dioxide is a primary gas associated with burning sulfur-containing fuels (like coal and oil) and reacts in the atmosphere to form fine particles such as sulfhites and sulfates, which are central to industrial smog (also called sulfurous smog). This aligns with the classic understanding of industrial smog composition.

Option 4: nitrogen gas (N2). Nitrogen gas is a major atmospheric constituent and is chemically inert under normal conditions; it is not a primary contributor to industrial smog. While nitrogen compounds can be present, N2 itself is not the smog component.

Option 5: argon. Argon is a noble gas and is largely inert; it does not participate in the chemical processes that create industrial smog and is not a defining component of smog.

Summary: Among the listed options, sulfur dioxide (SO2) best fits the description of a primary component of industrial smog due to its role in forming sulfurous and sulfate particulates that characterize the phenomenon. The other substances listed are either not central to smog formation or are inert atmospheric gases or toxic metals not defining features of industrial smog.

11:375:101:01 INTRO ENV SCIENCE Lecture #20 Quiz

One of the primary components of industrial smog is ____.

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