Question

Polarization is an important phenomenon which is helpful in determination of covalent nature of compound. With the help of Fajan's rule one can easily predict the nature of compound.
Which of the following halide possess the highest covalent character?

• A. $LiF$
• B. $LiCl$
• C. $LiBr$
• D. $Lil$

Answer 1

The correct option is D $Lil$

$L{i}^{+}$ has a high polarizing power. The higher the polarizability of the anion, the greater will be the covalent character.
For this reason, $LiI$ is the most covalent of the given lithium halides.