All of the following are characteristic features of catalyst EXCEPT:
Correct answer: D. All are correct.
- A. It speeds up a chemical reaction
- B. It is used in smaller amount
- C. Does not change the equilibrium constant of a reaction
- D. All are correct.
Explanation
Option D is correct.1.Speeds up a chemical reaction. A catalyst lowers the activation energy of a reaction, which allows the reaction to occur more quickly. 2.Used in small amounts. A catalyst is used in small amounts because it is not consumed in the reaction. 3.Does not change the equilibrium constant of a reaction. A catalyst does not change the equilibrium constant of a reaction. The equilibrium constant is a measure of the relative concentrations of the reactants and products at equilibrium.
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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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