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Which risk increases when a platinum catalytic converter cools rapidly?

A)Reduced catalytic activity temporarily occurs
B)Platinum oxidation increases permanently thereafter
C)Increased CO emissions are immediately released
D)Converter housing undergoes immediate thermal shock

💡 Explanation

Reduced catalytic activity occurs because rapid cooling decreases surface energy, inhibiting reactant adsorption. This inhibition is due to decreased thermal energy available for overcoming the activation energy barrier, therefore platinum's catalytic function is reduced rather than enhanced by other reactions.

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