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NEETChemistryAldehydes and Ketones

Consider the following two-step reaction sequence: Benzoyl chloride H ₂/ Pd-BaSO ₄ A A conc. NaOH, B + C Identify the final products B and C.

Options

  1. ABenzyl alcohol and sodium benzoate
  2. BBenzyl alcohol and benzoic acid
  3. CBenzaldehyde and sodium benzoate
  4. DCinnamic acid and water

Correct answer

A. Benzyl alcohol and sodium benzoate

Step-by-step solution

Benzoyl chloride undergoes Rosenmund reduction in the presence of H ₂ and Pd-BaSO ₄ to form benzaldehyde (Intermediate A). Benzaldehyde lacks -hydrogen atoms. When heated with concentrated NaOH, it undergoes the Cannizzaro reaction (disproportionation). One molecule is reduced to benzyl alcohol, and another is oxidized to sodium benzoate. Therefore, products B and C are benzyl alcohol and sodium benzoate. Benzoic acid is not formed directly because the reaction occurs in a strongly basic medium, which yields the ca

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