Which of the following reactions does not rep | vedclass

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(D) Aldol condensation requires the presence of at least one $\alpha-$hydrogen atom in the aldehyde or ketone. $A$,$B$,and $C$ involve carbonyl compou

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$2 HCHO \xrightarrow{	ext{conc. } NaOH / \Delta}$

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(D) Aldol condensation requires the presence of at least one $\alpha-$hydrogen atom in the aldehyde or ketone. $A$,$B$,and $C$ involve carbonyl compounds ($CH_3CHO$,$CH_3CH_2CHO$,$CH_3COCH_3$) that possess $\alpha-$hydrogens,thus they undergo aldol condensation. $D$ involves formaldehyde $(HCHO)$,which has no $\alpha-$hydrogen. Therefore,it does not undergo aldol condensation. Instead,it undergoes the Cannizzaro reaction in the presence of concentrated $NaOH$.

Which of the following reactions does not represent the aldol condensation reaction?

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