Out of the following compounds, which has the maximum covalent character?

A l C l_{3}

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A l I_{3}

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M g I_{2}

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N a I

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Solution

The correct option is A $A l I_{3}$
According to Fajan's Rule, smaller cation, larger anion and high charge value favour covalent character. Due to minimum electronegativity and maximum polarization, $A l I_{3}$ has maximum covalent character.

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