Which of the following statements about a catalyst is/are true?
This question has multiple correct options
A
A catalyst accelerates the reaction by bringing down the energy of activation.
B
A catalyst does not take part in the reaction.
C
A catalyst makes the reaction more feasible by making the ΔG∘ more negative.
D
A catalyst makes the equilibrium constant of the reaction more favourable for the forward reaction.
Medium
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Updated on : 2022-09-05
Solution
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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;
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.
