In the reaction sequence,the major products X | vedclass

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(A) The starting compound,phthalaldehyde,does not contain $\alpha$-hydrogen atoms. Therefore,in the presence of a strong base like $KOH$,it undergoes

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(A) The starting compound,phthalaldehyde,does not contain $\alpha$-hydrogen atoms. Therefore,in the presence of a strong base like $KOH$,it undergoes an intramolecular Cannizzaro reaction.In this reaction,one aldehyde group is reduced to a primary alcohol $(-CH_2OH)$ while the other aldehyde group is oxidized to a carboxylic acid salt $(-COO^-)$. Upon acidification with $H_3O^+$,the salt is converted into the carboxylic acid group $(-COOH)$,yielding $X$ ($o$-hydroxymethylbenzoic acid).When $X$ is heated in the presence of an acid catalyst $(H^+)$,it undergoes intramolecular esterification (loss of $H_2O$) to form a cyclic ester known as a lactone,which is $Y$ (phthalide).

In the reaction sequence,
the major products $X$ and $Y$ respectively are

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In the reaction sequence,the major products $X$ and $Y$ respectively are