A) zero
B) +3
C) +6
D) -6
Correct Answer: C
Solution :
Key Idea: Write balanced equation for change. Reaction must be balanced with respect to charge. \[{{M}^{3+}}-3{{e}^{-}}\xrightarrow{{}}{{M}^{6+}}\] \[\therefore \] after removing 3 electrons from \[{{\text{M}}^{\text{3+}}}\text{,}\]its oxidation state will be +6.
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