Among the three distinct position isomers of dimethylbenzene (xylene), which isomer is expected to e — Hydrocarbons Chemistry Question

💡 Solution & Explanation

The melting point of isomeric arenes depends heavily on symmetry, which dictates how closely molecules can pack in the solid state lattice. $p$ -xylene (1,4-dimethylbenzene) is the most symmetrical isomer, leading to stronger intermolecular lattice forces and the highest melting point among the xylenes.