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Q.
Benzaldehyde $+ NaOH \to$
Aldehydes Ketones and Carboxylic Acids
Solution:
Benaldehyde on heating with strong solution of $NaOH$, partly converted into an add salt and partly into alcohol.
Benzaldehyde lacks alpha $H$ atom.
Hence, when it is heated with strong $NaOH$ solution, it undergoes cannizzaro reaction in which one molecule of benzaldehyde is oxidized to benzoic acid and other molecule is reduced to benzyl alcohol. Benzoic acid forms sodium salt with $NaOH.$
$C _{6} H _{5} CHO + NaOH \rightarrow C _{6} H _{5} COONa + C _{6} H _{5} CH _{2} OH$