The incorrect hydrated radius order is:

$L i_{(a q)}^{+} < B e_{(a q)}^{2 +}$

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$N a_{(a q)}^{+} < A l_{(a q)}^{3 +}$

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$I_{(a q)}^{-} > C l_{(a q)}^{-}$

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$B a_{(a q)}^{2 +} < C a_{(a q)}^{2 +}$

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Solution

The correct option is C
$I_{(a q)}^{-} > C l_{(a q)}^{-}$

Hydrated radius $\propto$ charge per unit on ion.
$I^{-} (a q) > C l^{-} (a q)$

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