The addition of a catalyst to the reaction system:
Correct answer: D. Increases the rate of both the forward and reverse reactions equally
- A. Increases only the rate of the forward reaction
- B. Increases only the rate of the reverse reaction
- C. Increases the rate of the forward reaction but decreases the rate of the reverse reaction
- D. Increases the rate of both the forward and reverse reactions equally
Explanation
Option D is correct. Catalysts work by lowering the activation energy required for a reaction to proceed, which affects both the forward and reverse reactions equally. This results in an increased rate for both reactions, helping the system reach equilibrium faster without changing the equilibrium constant or the extent of reaction. Options A, B, and C are incorrect because they suggest an effect on only one direction of the reaction or a decrease in reaction rate, which is not how catalysts function.
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About Reaction Kinetics
Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
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