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← ScienceWhich process impairs catalytic converter effectiveness in vehicular exhaust systems?
A)Catalyst poisoning reduces surface activity✓
B)Thermal runaway raises operating temperature
C)Incomplete combustion increases CO levels
D)Back pressure impacts exhaust valve timing
💡 Explanation
Catalyst poisoning diminishes surface activity because reaction sites are blocked inhibiting oxidation and reduction, therefore weakening the converter's efficiency; rather than other thermal or combustion issues which have distinct root causes.
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