See image — IUPAC and Nomenclature Chemistry Question

💡 Solution & Explanation

Correct option: \(\text{D}\). The correct choice is \(\text{D}\), Malonic acid \mathrm{CH_3}. Classify each carbon by the number of carbon atoms directly attached to it: primary has one, secondary has two, and tertiary has three. The structure/name in the correct option gives the required count. Recovered question text: 7. A substance containing an equal number of primary, secondary and tertiary carbon atoms is : (A) Mesityl Oxide (B) Mesitylene (C) Maleic acid (D) Malonic acid \mathrm{CH_3}