A) \[C{{a}^{2+}}>{{K}^{+}}>{{S}^{2-}}>C{{l}^{-}}\]
B) \[C{{l}^{-}}>{{S}^{2-}}>C{{a}^{2+}}>{{K}^{+}}\]
C) \[{{S}^{2-}}>C{{l}^{-}}>{{K}^{+}}>C{{a}^{2+}}\]
D) \[{{K}^{+}}>C{{a}^{2+}}>C{{l}^{-}}>{{S}^{2-}}\]
Correct Answer: C
Solution :
[c] Among the isoelectronic species, size increases with the increase in negative charge. Thus \[{{S}^{2-}}\] has the highest negative charge and hence largest in size followed by \[C{{l}^{-}},\]\[{{K}^{+}}\]and Ca.
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