A) + 7
B) - 5
C) + 6
D) + 5
Correct Answer: A
$ Mn $ shows + 7 oxidation state in $ MnO_4^{-1} $ $ \overset{*,}{\mathop{MnO_4^{-1}}}, $ $ x+(-2\times 4)=-1 $ $ x-8=-1 $ $ x=-1+8=+7 $ .
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