A) \[MgC{{l}_{2}}\]
B) \[BaC{{l}_{2}}\]
C) \[CaC{{l}_{2}}\]
D) \[BeC{{l}_{2}}\]
Correct Answer: B
Solution :
Key Idea: Lattice energy increases as we go down the group so melting point also increases on going down the group. \[\therefore \]among\[MgC{{l}_{2}},\,\,BaC{{l}_{2}},\,\,CaC{{l}_{2}}\]and\[BeC{{l}_{2}},\,\,BaC{{l}_{2}}\]has to highest melting point.
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