Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET202526 Apr 2025Evening ShiftChemistryCarboxylic Acid DerivativesActual

Identify the product formed in the following reaction. CH ₃ CH ₂ Mg Br [ ii) dil. HCl ] i) Dry ice/ dry ether Product

Options

  1. AEthanoic acid
  2. BPropanoic acid
  3. C2-Methylpropanoic acid
  4. DButanoic acid

Correct answer

B. Propanoic acid

Step-by-step solution

Grignard Reaction with Carbon Dioxide Ethylmagnesium bromide ( CH ₃ CH ₂ MgBr ) reacts as a nucleophile with carbon dioxide ( CO ₂ ) in dry ether, attacking the electrophilic carbon to form a magnesium carboxylate salt. CH ₃ CH ₂ MgBr + CO ₂ CH ₃ CH ₂ COO ⁻ Mg ⁺ Br Hydrolysis with dilute hydrochloric acid liberates the carboxylic acid. CH ₃ CH ₂ COO ⁻ Mg ⁺ Br + HCl CH ₃ CH ₂ COOH + MgBrCl The product is propanoic acid ( CH ₃ CH ₂ COOH ), corresponding to option B.

Practice Carboxylic Acid Derivatives on Quantrex Academy →

More from Carboxylic Acid Derivatives

Identify the reagents, [A] and [B] used up when Salicylic acid undergoes the following reactions: 2026Identify the reason for the highest boiling point of R-COOH as compared to alkanes, ethers, alcohols and aldehydes. 2026Identify the reagent used in following reaction. Benzoic acid [ ] Reagent Benzoyl chloride + phosphorous oxychloride + Hydrogen chloride 2026Which from the following is NOT a monocarboxylic acid? 2026Identify the product obtained when isopropyl magnesium chloride in dry ether reacts with dry ice forming a complex, hydrolysed further. 2026Identify final products in the following sequence of reactions RCOOH + R'OH H ^+ intermediate Ni , ^ H ₂ Products 2026Identify the main product of following reaction 2026When will be the acidic character of carboxylic acid higher in following cases ? 2026 Full Carboxylic Acid Derivatives list All MHT CET PYQs