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Which outcome reduces the catalytic converter's rate of pollutants conversion?

A)Catalyst poisoning reduces active surface area
B)Increased engine idling raises catalyst temperature
C)Lower exhaust flow improves contact time
D)Bypass valve diverts higher flow rates

💡 Explanation

Catalyst poisoning reduces pollutants conversion, lowering reaction rates, because the poisoning blocks active catalytic sites. This changes the activation energy of the intermediate. Therefore, conversion rate is reduced rather than enhanced due to temperature, flow, or bypass optimization.

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