What does a catalyst do?

Alter the state of equilibrium.

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Decreases the activation energy.

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Increases collision frequency.

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Increases the average kinetic energy of reacting species.

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Solution

The correct option is D Decreases the activation energy.
Catalyst is a substance, which lowers the activation energy of reaction because it provides an alternate pathway for reaction. Also, it increases backward and forward reaction to the same extent. Due to this lower activation energy, equilibrium is attained faster.

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Similar questions

Q. A catalyst:
(i) increases the average kinetic energy of reacting molecules
(ii) decrease the activation energy
(iii) alters the reaction mechanism
(iv) increases the frequency of collisions of reacting species.
The true statements are:

Q. Assertion :Positive catalyst decrease the energy of activation. Reason: Negative catalyst increase the energy of activation.

Q. Assertion :If collision occurs between two elastic bodies their kinetic energy decreases during the time of collision. Reason: During collision intermolecular space decreases and hence elastic potential energy increases.

Q. Statement

1

: A catalyst increases the equilibrium of a reaction.
Statement

2

: Catalysts only lower the activation energy of the forward reaction.

As the temperature increases, the average kinetic energy of molecules increases. What would be the effect of an increase of temperature on pressure provided the volume is constant?

(a) Increases (b) Decreases

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