A) \[Ca{{F}_{2}}\]
B) \[CaC{{l}_{2}}\]
C) \[~CaB{{r}_{2}},\]
D) \[Ca{{I}_{2}}\]
Correct Answer: D
Solution :
\[Ca{{l}_{2}}\] has maximum covalent character due to large size of anion and possesses lowest energy. Thus, melting point is lowest.
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