A) \[C{{l}^{-}}\]
B) \[ClO_{4}^{-}\]
C) \[Cl{{O}^{-}}\]
D) \[MnO_{4}^{-}\]
E) \[NO_{3}^{-}\]
Correct Answer: C
Solution :
In all the given species except\[Cl{{O}^{-}},\]the central atoms are either in their minimum or maximum oxidation states and hence, they cannot further decrease or increase their oxidation states. In\[Cl{{O}^{-}},\] the oxidation state of\[Cl\]can be increased or decreased when it acts as oxidizing or reducing agents.| Species | Oxidation state |
| \[C{{l}^{-}}\] | \[-1\] |
| \[ClO_{4}^{-}\] | \[+7\] |
| \[Cl{{O}^{-}}\] | \[+1\] |
| \[MnO_{4}^{-}\] | \[+7\] |
| \[NO_{3}^{-}\] | \[+5\] |
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