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← ScienceWhich outcome occurs as hydrogenation catalyst surface decreases?
A)Reaction rate linearly decreases.✓
B)Equilibrium constant shifts unfavorably.
C)Activation energy barrier rises.
D)Product selectivity always sharply increases.
💡 Explanation
The reaction rate declines substantially because the availability of active sites decreases, hindering the reaction; this expresses surface-area-dependent catalysis. The reaction rate changes, therefore it slows, rather than equilibrium shifting unfavourably or raising activation energies, as catalyst only influences rate.
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