A catalyst:
Correct answer: B. Decreases the activation energy and increases the rate of reaction
- A. Decreases the activation energy and the rate of reaction
- B. Decreases the activation energy and increases the rate of reaction
- C. Increases the activation energy and decreases the rate of reaction
- D. Increases the activation energy and increases the rate of reaction
Explanation
A catalyst is a substance that lowers the activation energy required for a reaction to occur. By doing so, it provides an alternative reaction pathway that requires less energy, allowing more reactant molecules to surpass the energy barrier and participate in the reaction. This leads to an increased rate of the reaction.
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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.
Practise Reaction Kinetics
573 free Reaction Kinetics MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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