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← ScienceIf a catalytic converter operates below 250°C, which outcome predominantly occurs due to constraints on molecular motion?
A)Reduced reaction site diffusion✓
B)Increased byproduct selectivity
C)Enhanced catalyst thermal stability
D)Accelerated catalyst surface oxidation
💡 Explanation
Insufficient thermal energy hinders surface adsorbed reactants; therefore, the **Arrhenius equation** dictates a reduction in reaction site diffusion rates rather than increased selectivity, because lower temperatures decrease reaction kinetics as activation energy becomes harder to surmount.
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