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JEE Main202624 January 2026Evening ShiftChemistryAlcohols Phenols and EthersActual

The unsaturated ether on acidic hydrolysis produces carbonyl compounds as shown below:- aligned CH ₃- CH = CH - & O - CH = CH ₂ & H ₃ O ^ (+) CH ₃- CH ₂- CH = & O and O = CH - CH ₃ aligned Based on this, predict the solution/reagent that will help to distinguish " P " and " Q " obtained in the following reaction:-

Options

  1. AFehling solution
  2. BLucas reagent
  3. C2, 4 - DNP reagent
  4. DSaturated NaHSO ₃ solution

Correct answer

A. Fehling solution

Step-by-step solution

Acidic hydrolysis of vinyl ethers involves the addition of water across the double bond followed by the elimination of alcohol/phenol to form carbonyl compounds. In the given reaction: CH₃-CH=CH-O-C(CH₃)=CH₂ H₃O^+ P + Q The hydrolysis occurs at both vinyl ether linkages. The left part CH₃-CH=CH-O- hydrolyzes to form propanal: CH₃-CH₂-CHO (P). The right part -O-C(CH₃)=CH₂ hydrolyzes to form acetone: CH₃-CO-CH₃ (Q). P is an aldehyde (propanal) and Q is a ketone (acetone). Fehling solution is used to distinguish betwe

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