Which of the following has the same number of electrons transferred as MnO₄⁻ reduction?

Question

Accepted Answer

Au3+ + 3e– → Au(s)

Answer

Cr2O72– + 14H+ + 6e– → 2Cr3+ + 7H2O

Answer

O2(g) + 4H+ + 4e– → 2H2O

Answer

Br2 + 2e– → 2Br–

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