Which of the following metal chlorides has th | vedclass

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(B) According to $Fajans'$ rule,the covalent character of an ionic bond increases with: $1$. Smaller size of the cation. $2$. Higher charge on the cat

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$AlCl_3$

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(B) According to $Fajans'$ rule,the covalent character of an ionic bond increases with: $1$. Smaller size of the cation. $2$. Higher charge on the cation. $3$. Larger size of the anion. In the given options,$Al^{3+}$ has the smallest size and the highest charge $(+3)$ compared to $Na^+$ $(+1)$,$Cs^+$ $(+1)$,and $Ba^{2+}$ $(+2)$. Therefore,$AlCl_3$ exhibits the highest covalent character due to the high polarizing power of the $Al^{3+}$ ion.

Which of the following metal chlorides has the highest covalent character?

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