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MHT CET202521 Apr 2025Morning ShiftChemistryAlcohols Phenols and EthersActual

Identify substrate ' A ' in the following reaction. A + CO ₂ [6 ~atm ] 398 ~K Sodium salicylate H ₃ O ⁺ Salicylic acid

Options

  1. APhenol
  2. BSodium phenoxide
  3. CSalicyldehyde
  4. Do-Phenolsulphonic acid

Correct answer

B. Sodium phenoxide

Step-by-step solution

Kolbe-Schmitt reaction analysis: Sodium phenoxide carboxylation with CO₂ at 398 K under 6 atm pressure yields sodium salicylate, which upon acidification produces salicylic acid: C₆H₅ONa + CO₂ [] 398 ~K , 6 ~atm o-HOC₆H₄COONa o-HOC₆H₄COONa + H₃O^+ o-HOC₆H₄COOH Given the reaction conditions and products, the substrate A must be sodium phenoxide. Final answer: B

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