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MHT CET202519 Apr 2025Evening ShiftChemistryAldehydes and KetonesActual

Benzonitrile on reduction with stannous chloride in presence of hydrochloric acid followed by acid hydrolysis forms,

Options

  1. ABenzal chloride
  2. BBenzoyl chloride
  3. CBenzophenone
  4. DBenzaldehyde

Correct answer

D. Benzaldehyde

Step-by-step solution

The Stephen reaction reduces benzonitrile to benzaldehyde through an imine hydrochloride intermediate. Stannous chloride and hydrochloric acid reduce C₆ H₅CN to the imine hydrochloride: C₆ H₅CN + SnCl₂ + 2HCl C₆ H₅CH=NH HCl + SnCl₄ . Acid hydrolysis yields the aldehyde: C₆ H₅CH=NH HCl + H₂ O [H^+] C₆ H₅CHO + NH4Cl . The product is benzaldehyde, corresponding to option D .

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