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NEET levelSingle correct optionDifficulty 1 of 3o2120

In electrophilic aromatic substitution of benzene, the rate-determining step is

  1. Aregeneration of the catalyst
  2. Battack of the electrophile on the ring to form the arenium ion
  3. Cformation of the final product from the sigma complex
  4. Dloss of a proton from the arenium ion

Answer: B

The first step destroys aromaticity and has the higher activation energy, so it is slow. Loss of H+ from the arenium ion is fast because it regains aromatic stabilisation.
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