Which of the following compounds will have th | vedclass

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(B) According to $Fajans'$ rule,the covalent character increases with the increase in polarising power of the cation.$Zn^{2+}$ has a pseudo-noble gas

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$ZnCl_2$

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(B) According to $Fajans'$ rule,the covalent character increases with the increase in polarising power of the cation.$Zn^{2+}$ has a pseudo-noble gas configuration $(n-1)d^{10}ns^0$,which makes it more polarising than $Mg^{2+}$ (noble gas configuration).Among $FeCl_2$,$ZnCl_2$,$CdCl_2$,and $MgCl_2$,$ZnCl_2$ exhibits the highest covalent character due to the high polarising power of the $Zn^{2+}$ ion.Therefore,$ZnCl_2$ has the least ionic character.

Which of the following compounds will have the least ionic character?

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