MHTCET 10 May 2024 Shift 2 Paper

Concept:In a compound containing both $-\mathrm{COOH}$ and $-\mathrm{OH}$, the carboxylic acid group has higher priority and becomes the principal functional group.Explanation:The parent ring is named as benzoic acid, not as phenol.The $-\mathrm{COOH}$ group is fixed at carbon 1.The substituents are a hydroxyl group $\left(-\mathrm{OH}\right)$ and a methyl group $\left(-\mathrm{CH}_3\right)$.Their locants must be the lowest possible set, which gives positions 3 and 4, not 4 and 5.Alphabetically, hydroxy is written before methyl in the IUPAC name.Hence, the correct IUPAC name is 3-hydroxy-4-methylbenzoic acid.Answer:Option C: 3-Hydroxy-4-methylbenzoic acid.