Which one of the following orders is not in accordance with the property stated against it?

Step-by-step solution

Bond dissociation energy of halogen family decreases down the group as the size of atom increases. The decreasing order for the bond dissociation enthalpy of halogen molecules is Cl ₂(57 kcal / mol )> Br ₂(45.5 kcal / mol )> F ₂(38 kcal / mol )> I ₂(35.6 kcal / mol ). A Caution A halogen molecule having larger atoms should have low dissociation energy and vice versa. Fluorine is an exception because of interelectronic repulsion is present in small atom of fluorine