Which of the following salts shows the maximu | vedclass

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(A) According to $Fajan's$ rule,the covalent character of an ionic bond increases with an increase in the polarizing power of the cation.Polarizing po

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$AlCl_3$

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(A) According to $Fajan's$ rule,the covalent character of an ionic bond increases with an increase in the polarizing power of the cation.Polarizing power is directly proportional to the charge density of the cation (charge/size ratio).Comparing the cations: $Al^{3+}$,$Mg^{2+}$,$Cs^+$,and $La^{3+}$.$Al^{3+}$ has the smallest ionic radius and a high charge $(+3)$,resulting in the highest charge density.Therefore,$AlCl_3$ exhibits the maximum covalent character among the given options.

Which of the following salts shows the maximum covalent character?

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