Amongst the following species,maximum covalen | vedclass

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(C) According to $Fajan's$ rule,covalent character increases with the polarising power of the cation. Polarising power is directly proportional to the

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$HgCl_2$

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(C) According to $Fajan's$ rule,covalent character increases with the polarising power of the cation. Polarising power is directly proportional to the charge density of the cation. For the given species,all cations have a $+2$ charge ($Fe^{2+}$,$Zn^{2+}$,$Hg^{2+}$,$Cd^{2+}$). Among these,$Hg^{2+}$ has a pseudo-noble gas configuration ($18$ electrons in the outermost shell),which makes it more effective at polarizing the electron cloud of the $Cl^-$ anion compared to the others. Therefore,$HgCl_2$ exhibits the maximum covalent character.

Amongst the following species,maximum covalent character is exhibited by

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