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  4. Which of the following compounds would be most ionic in character?

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Q. Which of the following compounds would be most ionic in character?

NTA AbhyasNTA Abhyas 2020Chemical Bonding and Molecular Structure

Solution:

The lower valencies are more ionic, because the radius of $M^{2 +}$ is greater than that of $M^{4 +}$ and according to Fajan's rules, the smaller the ions, the greater is the tendency to covalency. $PbCl_{2}$ is more ionic than $SnCl_{2}$ , because Pb has lower electronegativity than that of Sn.