See image — Hydrocarbons Chemistry Question

💡 Solution & Explanation

Correct option: \(\text{D}\). Benzene preparation is chosen by matching the starting material and reagent sequence; common routes include decarboxylation, reduction or aromatisation under suitable conditions. Recovered question text: 4. From CHCl /CHI (Preparation of acetylene) 3 3 Physical Properties of Alkynes (A) First three members are gases, the next eight are liquids and the higher ones are solids. (B) Ethyne has characteristic odour, other members are odourless. (C) Alkynes are weakly polar in nature so insoluble with water but soluble in organic solvents like ethers, carbon tetrachloride and benzene. (D) Their melting point, boiling point