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← ScienceWhich outcome occurs when lowering temperatures drastically during platinum-catalyzed ammonia oxidation?
A)Decreased chemisorption reaction intermediates production ✓
B)Increased diffusion rate toward catalyst
C)More exothermic byproduct formation favored
D)Ammonia decomposition rate exceeds oxidation
💡 Explanation
Chemisorption decreases at lower temperatures because the **Arrhenius equation** dictates an exponential relationship between the rate constant and temperature. Therefore, chemisorption decreases, rather than other options that require higher temperatures or diffusion, causing a reduced catalytic activity.
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