Which among the following is the correct decr | vedclass

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

Vedclass · Accepted Answer

$AlCl_3 > MgCl_2 > NaCl$

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(A) According to $Fajan's$ rule,the covalent character of an ionic bond increases with an increase in the polarising power of the cation. Polarising power is directly proportional to the charge density of the cation. The charge on the cations is $Al^{+3} > Mg^{+2} > Na^{+}$. Therefore,the polarising power follows the order $Al^{+3} > Mg^{+2} > Na^{+}$. Consequently,the decreasing order of covalent character is $AlCl_3 > MgCl_2 > NaCl$.

Which among the following is the correct decreasing order of covalent character of ionic bonds?

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