Which of the following isomeric compounds of the formula possesses the highest boiling point? — Hydrocarbons Chemistry Question

💡 Solution & Explanation

In geometric isomers, the *cis* isomer is generally more polar than the *trans* isomer because the bond dipoles reinforce each other, yielding a higher net molecular dipole moment. This stronger dipole-dipole interaction in *cis*-2-butene gives it a higher boiling point ($4^{\circ}C$) compared to *trans*-2-butene ($1^{\circ}C$) and other isomers.