KC+CET PYQs for Reaction Mechanism with Solutions: Practice KCET Previous Year Questions

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Yashodeep Mahurkar

Updated on - Feb 16, 2026

Reaction Mechanism is an important topic in the Chemistry section in KCET exam. Practising this topic will increase your score overall and make your conceptual grip on KCET exam stronger.

This article gives you a full set of KCET PYQs for Reaction Mechanism with explanations for effective preparation. Practice of KCET Chemistry PYQs including Reaction Mechanism questions regularly will improve accuracy, speed, and confidence in the KCET 2026 exam.

KCET PYQs for Reaction Mechanism with Solutions

1.
Higher order (>3) reactions are rare due to
- Shifting of equilibrium towards reactants due to elastic collisions
- Loss of active species on collision
- Low probability of simultaneous collision of all reacting species
- Increase in entropy as more molecules are involved
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2.
Identify A and B in the reaction
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3.
Peroxide effect is observed with the addition of HBr but not with the addition of HI to unsymmetrical alkene because
- H-I bond is stronger that H-Br and is not cleaved by the free radical
- H-I bond is weaker than H-Br bond so that iodine free radicals combine to form iodine molecules
- Bond strength of HI and HBr are same but free radicals are formed in HBr
- All of these
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