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Which consequence results when a platinum catalyst's surface decreases in effective area contacting reactants?

A)Reduced surface reaction rate
B)Increased activation energy barrier
C)Shifted equilibrium toward products
D)Elevated catalyst turnover frequency

💡 Explanation

Reduced catalyst surface area causes a reduced surface reaction rate because fewer reactant molecules can adsorb and react on the surface according to Langmuir-Hinshelwood mechanism; therefore, the reaction is slower rather than being altered energetically or shifting equilibrium.

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