Home Chemistry Chemical Kinetics Assertion & Reason In this type of questions, a statement of as…
Chemistry Chemical Kinetics Assertion & Reason Single Correct MCQ
Published on: August 14, 2026

In this type of questions, a statement of assertion is followed by a statement of reason

. Mark the correct choice as :

Assertion : According to transition state theory, for the formation of an activated complex, one of the vibrational degrees of freedom is converted into a translational degree of freedom.
Reason : Energy of the activated complex is higher than the energy of reactant molecules.

A
If both assertion and reason are true and reason is the correct explanation of assertion.
B
If both assertion and reason are true but reason is not the correct explanation of assertion.
C
If assertion is true but reason is false.
D
If both assertion and reason are false.

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Text Solution

Verified by Experts
The correct answer is:
A

Products

The activated complex can also be treated as a distinct chemical species in equilibrium with the reactants which then decompose into products. It is however, a special molecule in which one vibrational degree of freedom has been converted to a translational degree of freedom along the reaction coordinate. It must be remembered that the activated complex is not merely an intermediate in process of breaking or forming of chemical bonds. It is unstable because it is situated at the maximum of the potential energy barrier separating the products from the reactants.

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