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Question

Assertion :Active complex is an intermediate product. Reason: Active complex is unstable with high vibrational energy.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Assertion is incorrect but Reason is correct
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Solution

The correct option is D Assertion is incorrect but Reason is correct
An intermediate is relatively high-energy species that has some short but finite life time duration during the course of a reaction. Intermediate reside in a local free energy minimum on the reaction co ordinate-not a maximum.
Activated complex" is a word used to describe the reacting molecules in the transition state. The activated complex is at the top of the energy barrier. Hence, they are not same.
It is elevated to a higher quantized vibrational state i.e., it is unstable with high vibrational energy.

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