See image — Hydrocarbons Chemistry Question

💡 Solution & Explanation

Correct option: \(\text{D}\). Hydrocarbon reactions are decided by bond type: alkanes mainly substitute, alkenes/alkynes add across multiple bonds, and aromatic rings undergo electrophilic substitution. Recovered question text: 97. Which of the following has the lowest heat of hydrogenation per mole – (A) cis-2-Butene (B) trans-2-Butene (C) 1-Butene (D) 1,3-Butadiene 170