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← ScienceWhich outcome occurs when a platinum catalyst is poisoned in a catalytic converter?
A)Increased hydrocarbon emission rate✓
B)Decreased engine compression ratio
C)Elevated coolant boiling temperature
D)Reduced fuel injection pulse width
💡 Explanation
When the platinum catalyst is poisoned, the active sites are blocked, inhibiting the oxidation and reduction reactions, and decreasing the reaction rate, because fewer molecules react per unit time. Therefore increased hydrocarbon emission rate results, rather than compression drop, boiling temperature increase or adjusted injection, because those are consequences of alternative failures.
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