AIIMS 2019 Chemistry Bond Energy MCQ Question

The bond dissociation energy order Cl₂ > Br₂ > F₂ > I₂ is attributed to the small size of fluorine, which leads to significant inter-electronic repulsion between the two fluorine atoms in F₂, weakening the bond. In contrast, chlorine, bromine, and iodine have larger atomic radii, resulting in less repulsion and stronger bonds. The other options are not applicable as they do not provide relevant information or alternatives regarding bond dissociation energies. Understanding these trends helps in grasping the relationship between atomic size, bond strength, and molecular stability.