In the case of alkali metals,the covalent cha | vedclass

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Question

(A) Fajan's rule states that the covalent character increases with the decrease in the size of the cation and increases with the increase in the size

Vedclass · Accepted Answer

$MI > MBr > MCl > MF$

Vedclass · Answer

(A) Fajan's rule states that the covalent character increases with the decrease in the size of the cation and increases with the increase in the size of the anion.Since the size of the anion increases down the group,the order of ionic size is $I^{-} > Br^{-} > Cl^{-} > F^{-}$.According to Fajan's rule,the covalent character increases as the size of the anion increases.Therefore,the order of covalent character is $MI > MBr > MCl > MF$.

In the case of alkali metals,the covalent character decreases in the order

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