For which element of first transition series the oxidation potential value
$(M \to M^{2 +} + 2 e^{-})$ is lowest

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Solution

Explanation:
The oxidation potential of an electrode is the negative of its reduction potential.
Therefore, the standard electrode potential of an electrode is described by its standard reduction potential.
Good oxidizing agents have high standard reduction potentials whereas good reducing agents have low standard reduction potentials.
In electrode potential series, the standard electrode potential of Cu is higher therefore oxidation potential is lowest.
Hence, option (C) is correct.

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For which element of first transition series the oxidation potential value
$(M \to M^{2 +} + 2 e^{-})$ is lowest

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