What compound is produced by the Cannizzaro reaction of Benzaldehyde in concentrated NaOH solution? (Hard)
Answer and explanation
Correct answer: A. Benzyl alcohol and Sodium benzoate
- Step 1: Benzaldehyde (C6H5-CHO) lacks alpha-hydrogens, so it cannot undergo aldol condensation. Step 2. In concentrated alkali, it undergoes disproportionation (self-redox): one molecule is reduced to Benzyl alcohol (C6H5-CH2-OH) and another is oxidized to Sodium benzoate (C6H5-COONa). Answer: Benzyl alcohol and Sodium benzoate. Why not the others: Benzoin is formed by cyanide-catalyzed benzoin condensation; benzene is not formed; toluene/phenol is unrelated.
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