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$(C)$ In reaction $(A)$, the carbonyl group of cyclopentanone undergoes nucleophilic addition with $2,4-$dinitrophenylhydrazine, which is a characteri

Vedclass · Accepted Answer

$A-R; B-P; C-Q$

Vedclass · Answer

$(C)$ In reaction $(A)$, the carbonyl group of cyclopentanone undergoes nucleophilic addition with $2,4-$dinitrophenylhydrazine, which is a characteristic reaction of aldehydes and ketones. Thus, $(A)$ matches with $(R)$.In reaction $(B)$, the tertiary alcohol undergoes acid-catalyzed dehydration to form a carbocation, which then undergoes intramolecular electrophilic aromatic substitution (Friedel-Crafts alkylation) to form the bicyclic product. Thus, $(B)$ matches with $(P)$.In reaction $(C)$, the thiol group acts as a nucleophile after deprotonation by the base, and it attacks the carbon atom bearing the chlorine atom, leading to an intramolecular nucleophilic substitution reaction. Thus, $(C)$ matches with $(Q)$.Therefore, the correct match is $A-R, B-P, C-Q$.

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In the reaction sequence,$[X]$ is a ketone:$[X] \xrightarrow{KMnO_4/OH^{-}/\Delta} HOOC-(CH_2)_3-CH(CH_3)-COOH$$[X]$ will be: