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NEET2015ChemistryAldehydes and KetonesActual

Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is:

Options

  1. AA Grignard reagent
  2. BHydrazine in presence of feebly acidic solution
  3. CHydrocyanic acid
  4. DSodium hydrogen sulphite

Correct answer

B. Hydrazine in presence of feebly acidic solution

Step-by-step solution

Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is hydrazine in presence of feebly acidic solution. For example, the reaction between acetone and hydrazine to form hydrazone is shown below.

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