Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules

Question

Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?\

Professor PC Thomas Classes · Answer

(d) :  A reason for this anomaly is the relatively large electronelectron repulsion among the lone pairs in $\mathrm{F}_{2}$ molecule where they are much closer to each other than in case of $\mathrm{Cl}_{2}$.\