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← ScienceWhich outcome results when a catalytic converter's reducing stage malfunctions?
A)Increased NOx emissions in exhaust✓
B)Decreased hydrocarbon combustion efficiency
C)Platinum catalyst surface area increase
D)Enhanced carbon dioxide production efficiency
💡 Explanation
Increased NOx emissions occur because reduction catalysts typically facilitate NOx conversion to N2; therefore, a failing reducing stage cannot complete NOx reduction, rather than affecting hydrocarbon combustion, because oxidation stages specifically target the later reaction.
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