See image — Hydrocarbons Chemistry Question

💡 Solution & Explanation

Correct option: \(\text{A}\). 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: 78. Addition of HCN to ethyne in presence of Ba(CN) as catalyst gives – 2 (A) 1, 1-dicyanoethane (B) Ethyl cyanide (C) Vinyl cyanide (D) Divinyl cyanide