MolSynapsequestion bank
MolSynapse / Question bank / Aldehydes, Ketones and Carboxylic Acids / Carboxylic acids: acidity, preparation, derivatives, HVZ reaction
JEE Advanced levelOne or more correct optionsDifficulty 3 of 3co217

Butanoic acid is heated with one equivalent of and a little red phosphorus, followed by water. Select the correct statements.

  1. AThe main product is 4-bromobutanoic acid
  2. BThe product is 2-bromobutanoic acid
  3. C2,2-dimethylpropanoic acid also undergoes the same reaction readily
  4. DAn acyl bromide intermediate enolises before bromination

Answer: B, D

The acyl bromide intermediate enolises and brominates only at the alpha carbon, so 2-bromobutanoic acid forms. 4-Bromobutanoic acid does not form. 2,2-Dimethylpropanoic acid has no alpha hydrogen and does not undergo HVZ.
Practice Aldehydes, Ketones and Carboxylic Acids More on Carboxylic acids: acidity, preparation, derivatives, HVZ reaction
Previous questionNext question

More questions on Carboxylic acids: acidity, preparation, derivatives, HVZ reaction