Polarisability of halide ions increases in th | vedclass

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Question

(D) According to $Fajan's$ rule,the polarisability of an anion depends on its size. As the size of the anion increases,the valence electrons are held

Vedclass · Accepted Answer

$F^{-}, Cl^{-}, Br^{-}, I^{-}$

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(D) According to $Fajan's$ rule,the polarisability of an anion depends on its size. As the size of the anion increases,the valence electrons are held less tightly by the nucleus,making them more easily distorted by a cation. Therefore,polarisability increases as the ionic radius increases. The ionic radii of halide ions follow the order: $F^{-} Thus,the order of polarisability is $F^{-} < Cl^{-} < Br^{-} < I^{-}$.

Polarisability of halide ions increases in the order:

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