MolSynapsequestion bank
MolSynapse / Question bank / Aldehydes, Ketones and Carboxylic Acids / Reduction, oxidation and HVZ products of drawn carbonyls and acids
JEE Main levelSingle correct optionDifficulty 2 of 3co253

The aldehyde shown is tested separately with Tollens' reagent and Fehling's solution. The result is

  1. ATollens' test positive, Fehling's test negative
  2. BBoth tests positive
  3. CFehling's test positive, Tollens' test negative
  4. DBoth tests negative

Answer: A

The drawn compound is benzaldehyde. Aromatic aldehydes reduce Tollens' reagent (silver mirror) but are not oxidised by the milder Cu(II) tartrate complex of Fehling's solution, which reacts only with aliphatic aldehydes.
Practice Aldehydes, Ketones and Carboxylic Acids More on Reduction, oxidation and HVZ products of drawn carbonyls and acids
Previous questionNext question

More questions on Reduction, oxidation and HVZ products of drawn carbonyls and acids