The seven-carbon chain carries a hydroxyl group together with a carbon−carbon double bond and a carbon−carbon triple bond, so it is a heptenynol. The hydroxyl is the principal characteristic group and must take the lowest locant; its carbon lies fourth from either end, so the alcohol is at carbon four. The remaining choice of direction is settled by giving the lower locant to the double bond, which is cited before the triple bond, so numbering starts at the double-bond end, placing the double bond at carbon one and the triple bond at carbon six. The compound is hept-1-en-6-yn-4-ol.
JEE Main · 2025 · 04 Apr 2025 · Shift 2 · Single correct option
