Reaction: CH_3-CO-CH_2-CH_2-CH_2-CH_2-CHO xri | vedclass

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(B) The reaction is an intramolecular aldol condensation of $CH_3-CO-CH_2-CH_2-CH_2-CH_2-CHO$. $1$. The base $HO^-$ abstracts an $\alpha$-hydrogen fro

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$1-$Acetylcyclopentene

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(B) The reaction is an intramolecular aldol condensation of $CH_3-CO-CH_2-CH_2-CH_2-CH_2-CHO$. $1$. The base $HO^-$ abstracts an $\alpha$-hydrogen from the ketone group ($CH_3$ group) to form an enolate ion. $2$. This enolate ion attacks the carbonyl carbon of the aldehyde group,leading to the formation of a five-membered ring. $3$. Subsequent dehydration (loss of $H_2O$) under heating $(\Delta)$ yields the conjugated unsaturated product. $4$. The structure formed is $1$-acetylcyclopentene,which corresponds to option $(B)$.

Reaction: $CH_3-CO-CH_2-CH_2-CH_2-CH_2-CHO \xrightarrow{HO^{-}/\Delta} \underset{(73\%)}{(A)}$
Product $(A)$ is

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Reaction: $CH_3-CO-CH_2-CH_2-CH_2-CH_2-CHO \xrightarrow{HO^{-}/\Delta} \underset{(73\%)}{(A)}$ Product $(A)$ is