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← ScienceWhich outcome slows the reaction rate when insufficient catalyst is present?
A)Increased activation energy is required✓
B)Equilibrium shifts towards products
C)Reactant concentration sharply elevates
D)Collisions become productively frequent
💡 Explanation
The reaction slows down because catalyst insufficiency promotes the **reduced surface adsorption**, which raises the activation energy threshold; therefore less reactant convert to products rather than having high frequency collision efficiency.
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