MHTCET 25 Apr 2025 Shift 1 Paper

Concept:The parent chain is the cyclobutane ring, and substituents are named alphabetically with lowest locant numbering.Explanation:The given structure has a cyclobutane ring as the main parent. One carbon of the ring carries a methoxy group ($-\mathrm{OCH}_3$). The adjacent carbon carries two methyl groups ($-\mathrm{CH}_3$). For lowest locants, the carbon bearing two methyl groups is numbered as C-1, so the two methyl groups get positions 1,1. The methoxy group is then at position 2. Therefore, the IUPAC name is 2-methoxy-1,1-dimethylcyclobutane.Answer:2-Methoxy-1,1-dimethylcyclobutane Correct option: D.