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MHT CET202522 Apr 2025Morning ShiftChemistryCarboxylic Acid DerivativesActual

Identify the product ' B ' in following reaction. Dry ice [ dry ether ] CH ₃ MgBr A H ₃ O ⁺ B

Options

  1. AMethanoic acid
  2. BEthanoic acid
  3. CMethanol
  4. DEthanol

Correct answer

B. Ethanoic acid

Step-by-step solution

Reaction of dry ice with Grignard reagent : Carbon dioxide reacts with methylmagnesium bromide to form the magnesium salt of acetic acid. CO₂ + CH₃ MgBr CH₃ C(O)OMgBr Hydrolysis with acid yields the carboxylic acid: CH₃ C(O)OMgBr + H₃ O+ CH₃ COOH + Mg(OH)Br The final product is ethanoic acid, corresponding to option B.

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