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JEE Main · 2024 · 29 Jan 2024 · Shift 1 · General Organic Chemistry

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The difference in energy between the actual structure and the lowest energy resonance structure for the given compound is
  1. (A)electromeric energy
  2. (B)resonance energy✓ Correct
  3. (C)ionization energy
  4. (D)hyperconjugation energy

Answer: (B)

Solution

The difference in energy between the actual (resonance-hybrid) structure of a molecule and its most stable (lowest-energy) contributing resonance structure is called the resonance energy.

This is a definitional result and does not depend on the specific compound drawn: it holds for any resonance-stabilized system, so the key can be confirmed even without the compound's structure.

Key confirmed: B (resonance energy).

JEE Main · 2024 · 29 Jan 2024 · Shift 1 · Single correct option

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