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NEETChemistryAmines

Consider the following sequence of reactions: Nitrobenzene Sn / HCl A [ 273-278 K ] NaNO ₂ / HCl B CH ₃ CH ₂ OH C The major product C is:

Options

  1. ABenzene
  2. BPhenol
  3. CEthoxybenzene
  4. DChlorobenzene

Correct answer

A. Benzene

Step-by-step solution

Nitrobenzene is reduced by Sn / HCl to form aniline ( A ). Aniline undergoes diazotization with NaNO ₂ and HCl at 273-278 K to form benzenediazonium chloride ( B ). Benzenediazonium chloride is treated with ethanol ( CH ₃ CH ₂ OH ), which acts as a mild reducing agent. It reduces the diazonium salt to benzene ( C ) while being oxidized to ethanal. Therefore, the major product C is benzene. Ethoxybenzene is incorrect as ethanol acts as a reducing agent, not a nucleophile. Phenol would be formed if the diazonium salt

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