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Which of the following statements is true about catalysts?
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15. Chemical Kinetics
Catalyst
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In chapter 19, the catalytic converter on automobiles is not intended to do which one of the following?
A
Reduce nitrogen oxides (NOx) to nitrogen gas (N2)
B
Convert carbon monoxide (CO) to carbon dioxide (CO2)
C
Remove particulate matter from exhaust gases
D
Oxidize unburned hydrocarbons to carbon dioxide and water
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Understand the primary functions of a catalytic converter in automobiles, which are to reduce harmful emissions by facilitating chemical reactions.
Identify the common reactions catalyzed by the converter: reduction of nitrogen oxides (NOx) to nitrogen gas (N2), oxidation of carbon monoxide (CO) to carbon dioxide (CO2), and oxidation of unburned hydrocarbons to carbon dioxide (CO2) and water (H2O).
Recognize that the catalytic converter does not physically remove particulate matter; instead, it chemically transforms gaseous pollutants.
Recall that particulate matter removal is typically handled by other devices such as diesel particulate filters, not by catalytic converters.
Conclude that the catalytic converter's role excludes removing particulate matter from exhaust gases, which is why that option is the correct answer to the question.
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