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← ScienceWhich outcome occurs when a catalyst contaminates reactants?
A)Reaction rate exponentially decreases✓
B)Activation energy barrier increases
C)Equilibrium constant approaches one
D)Reactant concentration initially decreases
💡 Explanation
A contaminant impedes access to active sites; therefore, reaction rate exponentially decreases because the contaminant reduces the effectiveness of surface adsorption, rather than affecting activation directly.
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