A) \[SO_{4}^{2-}.....SO_{3}^{2-}\]
B) \[C{{u}^{2+}}....Cu\]
C) \[{{H}^{+}}....H\]
D) \[{{H}^{-}}....H\]
Correct Answer: D
Solution :
Loss of an electron or increase in .oxidation number is oxidation process. i.e., \[{{H}^{-}}\xrightarrow[{}]{{}}H+{{e}^{-}}\]
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