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NEET levelSingle correct optionDifficulty 1 of 3o1250

The acid derivative shown is treated with water at room temperature. Which pair of products is formed?

  1. AEthanol and carbon monoxide
  2. BEthanoic acid and hydrogen chloride
  3. CEthanoic anhydride and hydrogen chloride
  4. DEthanal and hypochlorous acid

Answer: B

Ethanoyl chloride is a highly reactive acid chloride. Water attacks the carbonyl carbon and chloride is lost in the nucleophilic acyl substitution, giving ethanoic acid and hydrogen chloride (fuming in moist air).
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