Chemistry - CHEMICAL BONDING Question with Solution | TestHub

The correct order for melting points of aluminum halides is $\mathrm{Al}{\mathrm{F}}_3>\mathrm{AlC}{\mathrm{l}}_3>\mathrm{AlB}{\mathrm{r}}_3>\mathrm{Al}{\mathrm{I}}_3$. $\mathrm{Al}{\mathrm{F}}_3$ is ionic, leading to a much higher melting point. The other halides are predominantly covalent, with melting points decreasing as the size of the halide ion increases due to weaker intermolecular forces. Therefore, option C is incorrect.