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Enzyme Catalysis

Which of the ...

Question

Which of the following reasons enable a catalyst to increase the rate of a chemical reaction?

A

Providing energy to the moleucules

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B

Increasing the temperature of the reaction mixture

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C

Increasing activation energy

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D

Lowering the activation energy

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Solution

The correct option is D
Lowering the activation energy

Catalysts reduce the activation energy needed to start a chemical reaction, enabling the reaction to happen faster.

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Similar questions

Q. Which of the following factors are responsible for the increase in the rate of a surface catalyzed reaction?
(i) A catalyst provides proper orientation for the reactant molecules to react.
(ii) The heat of adsorption of reactants on a catalyst helps reactant molecules to overcome activation energy.
(iii) The catalyst increases the activation energy of the reaction.

Q. Assertion :A positive catalyst increases the rate of a reaction. Reason: In presence of a catalyst, the activation energy of the reaction increases.

Q. Which of the following factors are responsible for the increase in the rate of a surface catalysed reaction?
I. A catalyst provides proper orientation for the reactant molecules to react
II. Heat of adsorption of reactants on a catalyst helps reactant molecules to.overcome activation energy
III. The catalyst increases the activation energy of the reaction
IV. Adsorption increases the local concentration of reactant molecules on the surface of the catalyst
Select the correct answer using the codes given below:

Assertion: A catalyst increases the rate of the reaction.

Reason: Catalysts lowers the activation energy of the reactants.

Q. Assertion :A rate of reaction of most of the reactions doubles, when temperature increased from

298 K

308 K

. Reason: The activation energy of reaction decreases with increase in temperature.

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Enzyme Catalysis

Standard XII Chemistry

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