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REDOX REACTIONS AND ELECTROCHEMISTRY
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Question
Which of the following has the same number of electrons transferred as MnO₄⁻ reduction?
A. Cr2O72– + 14H+ + 6e– → 2Cr3+ + 7H2O
B. Au3+ + 3e– → Au(s)
C. O2(g) + 4H+ + 4e– → 2H2O
D. Br2 + 2e– → 2Br–
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