Which of the following comparisons between the physical properties of *cis* and *trans* isomers of a — Hydrocarbons Chemistry Question
Question
Which of the following comparisons between the physical properties of *cis* and *trans* isomers of a symmetrical alkene (such as 2-butene) is/are CORRECT?
💡 Solution & Explanation
(A) *cis*-isomers have bond dipoles that add up, while *trans*-isomers cancel out (zero or lower dipole). (B) *trans*-isomers place bulky groups on opposite sides, minimizing steric strain. (D) The higher polarity of the *cis*-isomer gives it stronger intermolecular forces and a higher boiling point. (C) is incorrect; the *trans*-isomer is more symmetrical and packs better in the solid state, giving it a higher melting point than the *cis*-isomer.