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JEE Main levelSingle correct optionDifficulty 2 of 3nc006

To obtain ethanamine as the major product from ethyl bromide by ammonolysis, the best condition is:

  1. A with in excess
  2. Ba large excess of with a small amount of
  3. Cequimolar and heated strongly
  4. Da large excess of with a small amount of

Answer: D

The primary amine formed is itself nucleophilic and reacts further with to give secondary, tertiary amines and finally the quaternary salt. A large excess of ammonia makes it far more likely that meets rather than the product, so the primary amine predominates.
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