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← ScienceWhich consequence results when increased energy input surpasses catalyst optimum?
A)Reduced reaction selectivity✓
B)Increased catalyst lifespan
C)Lowered activation energy
D)Enhanced product purity
💡 Explanation
Selectivity decreases via catalyst poisoning from overheating. Overheating introduces defects, triggering undesired side reactions, because the *Arrhenius Equation* relates rate and temperature; therefore, selectivity diminishes with rising temperature, rather than enhancing purity or lifespan.
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