A) \[KI\]
B) \[FeS{{O}_{4}}\]
C) \[KMn{{O}_{4}}\]
D) \[{{K}_{2}}Mn{{O}_{4}}\]
Correct Answer: C
Solution :
In \[KMn{{O}_{4}},\] \[Mn\] is present in its highest oxidation state, ie, \[+7\]. Since further increase in oxidation number of \[Mn\] is not possible, its oxidation with other oxidising reagent such as \[{{O}_{2}}\] is not possible.
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