Chemistry - CHEMICAL BONDING Question with Solution | TestHub

The incorrect statement is that Fluorine ( ${\mathrm{F}}_2$ ) has the highest bond dissociation enthalpy among halogens. Due to the small size of the fluorine atom, the lone pairs on the two atoms are very close, leading to significant electron-electron repulsion, which weakens the F-F bond. The correct order of bond dissociation enthalpy is ${\mathrm{Cl}}_2>{\mathrm{Br}}_2>{\mathrm{F}}_2>12$. The other statements are correct chemical facts.