JEE Chemistry · Hard

General Organic Chemistry: JEE Advanced MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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JEE AdvancedHardQuestion 730014

Question

The stability of free radicals follows the order:
  1. A
    3° > 2° > 1° > CH₃
    Correct
  2. B
    CH₃ > 1° > 2° > 3°
  3. C
    All equal
  4. D
    Allylic < alkyl

Correct answer

3° > 2° > 1° > CH₃

Explanation

Free radical stability parallels carbocation stability due to hyperconjugation: tertiary > secondary > primary > methyl. Additionally, allylic and benzylic radicals are more stable than even tertiary due to resonance.