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Which 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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