See image — Hydrocarbons Chemistry Question

💡 Solution & Explanation

Correct option: \(\text{C}\). 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: 1. Polymerisation (a) Linear polymerisation : Under suitable conditions, linear polymerisation of ethyne takes place to produce polyacetylene or polyethyne which is a high molecular weight polyene. (b) Cyclic polymerisation : Ethyne on passing through red hot iron tube at 873K undergoes cyclic polymerisation.