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← ScienceWhich outcome occurs when a hydrogenation catalyst degrades, altering reaction kinetics constants?
A)Increased reverse reaction rate constant
B)Decreased forward reaction rate constant✓
C)Lowered activation energy barrier only
D)Greater equilibrium product concentration proportionally
💡 Explanation
A degraded hydrogenation catalyst lowers available active sites, which decreases the probability of successful substrate-catalyst interactions. This reduces the rate constant by the induced-fit mechanism, therefore forward reaction rate decreases, rather than an increased reverse rate constant, because fewer forward activated complexes form at a given substrate concentration.
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