Chemistry Reaction Kinetics SZABMU 2022
PMDC Verified Question 29 of 80
What is incorrect about activated complex?
A
It is a high energy specie
B
It is a stable specie
C
It is an unstable specie
D
Potential energy is maximum at activated complex state
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: It is a stable specie
Concept:

The activated complex (or transition state) is the transient, intermediate structure formed at the absolute peak of the activation energy barrier during a collision.

Solution:

  • Because the activated complex sits at the maximum point of potential energy on the reaction coordinate diagram, it is incredibly unstable.
  • It exists only for a fraction of a picosecond before breaking apart to form either products or reverting back to reactants.
  • Therefore, calling it a "stable specie" is entirely incorrect.


Why other options are incorrect:

Options A, C, and D accurately describe the activated complex: it has maximum potential energy, making it a highly unstable, high-energy species.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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