Which of the following is in the increasing o | vedclass

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(A) According to Fajan's rule,the ionic character increases as the polarizing power of the cation decreases. Polarizing power depends on the charge an

Vedclass · Accepted Answer

$PbCl_4 < PbCl_2 < CaCl_2 < NaCl$

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(A) According to Fajan's rule,the ionic character increases as the polarizing power of the cation decreases. Polarizing power depends on the charge and size of the cation. $Pb^{4+}$ has a higher charge and smaller size than $Pb^{2+}$,so $PbCl_4$ is more covalent than $PbCl_2$. $CaCl_2$ and $NaCl$ are ionic compounds,where $NaCl$ is more ionic than $CaCl_2$ due to the lower charge on the $Na^+$ ion compared to $Ca^{2+}$. Thus,the increasing order of ionic character is $PbCl_4 < PbCl_2 < CaCl_2 < NaCl$.

Which of the following is in the increasing order of the ionic character?

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