Chemistry · Aldehyde and Ketones: Nature of carbonyl group, nucleophilic addition to >C=O group, relative reactivities of aldehydes and ketones

In the given reaction, the product \) is N a C N / \boldsymbol{H} C l}{(i i) \bo

In the given reaction, the product \( (B) \) is \( \boldsymbol{C H}_{3} \boldsymbol{C H O} \frac{(i) N a C N / \boldsymbol{H} C l}{(i i) \boldsymbol{H}_{2} \boldsymbol{O} / \boldsymbol{H} \oplus / \boldsymbol{\Delta}}(\boldsymbol{A}) \frac{\boldsymbol{F e n t o n}}{\text {reagent}} \) \( (B) \)

  • A. acetic acid
  • B. oxalic acid
  • C. pyruvic acid
  • D. citric acid

Step-by-step solution

Acetaldehyde reacts with NaCN/HCl to form cyanohydrin (CH3CH(OH)CN). Acidic hydrolysis yields lactic acid (CH3CH(OH)COOH), which is then oxidized by Fenton reagent (Fe2+/H2O2) to pyruvic acid (CH3COCOOH).
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