Which of the following statements about a catalyst is/are true?

This question has multiple correct options

A catalyst accelerates the reaction by bringing down the energy of activation.


A catalyst does not take part in the reaction.


A catalyst makes the reaction more feasible by making the more negative.


A catalyst makes the equilibrium constant of the reaction more favourable for the forward reaction.

Updated on : 2022-09-05
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Correct options are A) and B)

Hint: A catalyst does not affect the thermodynamic parameters of a reaction such as enthalpy, entropy, Gibbs energy, and equilibrium constant. 

Explanation for Correct Answer:

  • A catalyst increases the rate of the reaction by lowering the activation energy.

  • The diagram suggests the activation energy with the catalyst and without the catalyst as below;
The effect of catalysts on rates of reaction
  • As Catalyst increases the reaction rate by lowering the activation energy, So, Option A is correct.

  • Catalyst does not take part actively in the reaction, it just is consumed in one step and regenerated in another step. and it requires in a very small quantity. So, Option B is also correct.

Explanation for Incorrect Answer:

  • A catalyst does not affect the thermodynamic parameters of a reaction. So, Option C is Incorrect

  • A catalyst does not affect the equilibrium constant of a reaction. It just speeds up the rate of attainment of equilibrium. So, Option D is Incorrect.

Final answer: Option and .

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