Which outcome results when a catalyst poisons the active sites during irreversible reaction?

💡 Explanation

When a catalyst is poisoned, the active sites are blocked, hindering reactant adsorption and the subsequent reaction mechanism, so overall reaction rate decreases because effective catalyst concentration reduces. Therefore, the rate immediately drops rather than shifting equilibrium, activation energy changing, or reverse rate outweighing forward which would require a reversible reaction and changes in thermodynamic parameters.

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