See image — IUPAC and Nomenclature Chemistry Question

💡 Solution & Explanation

Correct option: \(\text{D}\). The correct choice is \(\text{D}\), Iso octane. The common prefix iso is used only for the permitted branched-chain pattern with a terminal \(\mathrm{(CH_3)_2CH-}\) unit. The option marked correct does not satisfy that accepted usage. Recovered question text: 6. Which of the following compound’s prefix ‘iso’ is not correct - (A) Iso pentane (B) Iso Hexane (C) Iso butane (D) Iso octane