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JEE Main levelSingle correct optionDifficulty 2 of 3nc063

Ethylamine is treated with and dil. at 273-278 K. The principal reaction is

  1. Aformation of a stable ethanediazonium chloride that can be isolated
  2. Bformation of ethanol with evolution of
  3. Cformation of N-nitrosoethylamine as a yellow oil
  4. Dformation of ethyl chloride by a Sandmeyer type reaction

Answer: B

Aliphatic primary amines give unstable alkanediazonium ions, which lose at once to give carbocations and hence mainly the alcohol (). Stable diazonium salts form only from primary aromatic amines, and N-nitroso compounds come from secondary amines.
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