A) \[{{I}^{-}}\]
B) \[S(s)\]
C) \[NO{}_{3}^{-}(aq)\]
D) \[C{{r}_{2}}O{}_{7}^{2-}\]
Correct Answer: A
Solution :
[a] If an electronegative element is in its lowest possible oxidation state in a compound or in free state. It cannot function as a powerful oxidising agent, e.g.\[{{I}^{-}}\]
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