Which one of the following orders is correct | vedclass

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(D) The correct order of bond dissociation enthalpy for halogen molecules is $Cl_2 > Br_2 > F_2 > I_2$.Although bond dissociation energy generally dec

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$Cl_2 > Br_2 > F_2 > I_2$

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(D) The correct order of bond dissociation enthalpy for halogen molecules is $Cl_2 > Br_2 > F_2 > I_2$.Although bond dissociation energy generally decreases down the group due to an increase in atomic size,$F_2$ is an exception.In $F_2$,the small size of the fluorine atoms leads to strong inter-electronic repulsion between the lone pairs of the two atoms,which significantly weakens the $F-F$ bond.Therefore,the bond dissociation enthalpy of $F_2$ is lower than that of $Cl_2$ and $Br_2$.

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

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