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  4. Benzyl alcohol and sodium benzoate is obtained by the action of sodium hydroxide on benzaldehyde. This reaction is known as

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Q. Benzyl alcohol and sodium benzoate is obtained by the action of sodium hydroxide on benzaldehyde. This reaction is known as

Aldehydes Ketones and Carboxylic Acids

Solution:

Benzaldehyde on treatment with $50\%$ aqueous or ethanolic alkali solution undergoes Cannizzaro’s reaction like $HCHO$ (no $\alpha-$-hydrogen atom), i.e., one molecule is oxidised and one is reduced with the formation o f benzoic acid and benzyl alcohol respectively
$2C_6H_5CHO +HCHO \xrightarrow{NaOH} C_6H_5CH_2OH +C_6H_5COONa $