• # question_answer Which of the following compounds has the lowest melting point? A) $Ca{{F}_{2}}$        B) $CaC{{l}_{2}}$C) $~CaB{{r}_{2}},$       D) $Ca{{I}_{2}}$

$Ca{{l}_{2}}$ has maximum covalent character due to large size of anion and possesses lowest energy. Thus, melting point is lowest.