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JEE Main levelSingle correct optionDifficulty 2 of 3nc172

To obtain ethylamine as the main product from ethyl bromide by ammonolysis, the best condition is

  1. Aa large excess of
  2. Bequal moles of and
  3. Ca large excess of (alcoholic)
  4. Dexcess with prolonged heating

Answer: C

The primary amine formed is itself nucleophilic and keeps reacting with alkyl halide to give secondary, tertiary amines and finally a quaternary salt. A large excess of ammonia makes the alkyl halide meet ammonia rather than the product, so the primary amine dominates.
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