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MHT CET202619 April 2026Morning ShiftChemistryAlcohols Phenols and EthersActual

Which of the following pair of reagents is used for the conversion of carboxylic acid to alcohol ?

Options

  1. ALiAlH ₄ / H ₃ O ^+
  2. BH ₂ / Ni - heat
  3. CB ₂ H ₆ / H ₂ O ₂, OH ^-
  4. DH ₂ / Pd

Correct answer

A. LiAlH ₄ / H ₃ O ^+

Step-by-step solution

Carboxylic acids are reduced to primary alcohols by strong reducing agents such as lithium aluminium hydride ( LiAlH ₄ ) followed by acid hydrolysis ( H ₃ O ^+ ). RCOOH LiAlH ₄ RCH ₂ O ^- Li ^+ H ₃ O ^+ RCH ₂ OH Catalytic hydrogenation using H ₂ / Ni or H ₂ / Pd does not reduce carboxylic acids. B ₂ H ₆ / H ₂ O ₂, OH ^- is the reagent for the hydroboration-oxidation of alkenes to alcohols. Answer: LiAlH ₄ / H ₃ O ^+

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