A) \[NaCl\]
B) \[CaC{{l}_{2}}\]
C) \[MgC{{l}_{2}}\]
D) \[AlC{{l}_{3}}\]
Correct Answer: A
Solution :
\[NaCl\] has highest boiling point as it is the most ionic among these. According to Fajans rule, greater the charge on cation, greater will be its polarizing power. Hence, \[A{{l}^{3+}}\] polarise \[C{{l}^{-}}\] ions to much extent and consequently, it is partly covalent while\[NaCl\]is much ionic.
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