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(D) homologous series is a group of compounds that have the same functional group and similar chemical properties,with each successive member differin

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All of these

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(D) homologous series is a group of compounds that have the same functional group and similar chemical properties,with each successive member differing by a $CH_2$ group.$A$: Benzyl alcohol $(C_6H_5CH_2OH)$ is a primary alcohol,while $o$-cresol ($2$-methylphenol,$C_6H_4(CH_3)OH$) is a phenolic compound. They have different functional groups.$B$: Benzylamine $(C_6H_5CH_2NH_2)$ is a primary amine,while $N$-methylaniline $(C_6H_5NHCH_3)$ is a secondary amine. They belong to different classes of amines.$C$: Benzoic acid $(C_6H_5COOH)$ is a carboxylic acid,while Phenyl formate $(HCOOC_6H_5)$ is an ester. They have different functional groups.Since none of the pairs represent the same homologous series,the correct answer is $D$.

Which pair of compounds does not represent the same homologous series?

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