MHTCET 16 May 2024 Shift 1 Paper

Concept:The aldehyde group ($-\mathrm{CHO}$) has higher priority than the alcohol and methyl groups, so the parent chain is benzaldehyde.Explanation:The benzene ring contains three substituents: $-\mathrm{CHO}$, $-\mathrm{OH}$, and $-\mathrm{CH_3}$.Since $-\mathrm{CHO}$ is the principal functional group, the parent name is benzaldehyde.The $-\mathrm{OH}$ and $-\mathrm{CH_3}$ groups are present at the meta positions, i.e., positions 3 and 5.For alphabetical order, "hydroxy" comes before "methyl", so $-\mathrm{OH}$ is assigned locant 3 and $-\mathrm{CH_3}$ is assigned locant 5.Therefore, the IUPAC name is 3-hydroxy-5-methylbenzaldehyde.Answer:C. 3-hydroxy-5-methylbenzaldehyde