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REDOX REACTIONS AND ELECTROCHEMISTRY
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Question
Which of the following is used in breathalyzer tests?
A. MnO4– + 8H+ + 5e– → Mn2+ + 4H2O 1.51
B. Cr2O72– + 14H+ + 6e– → 2Cr3+ + 7H2O 1.33
C. O2(g) + 4H+ + 4e– → 2H2O 1.23
D. Br2 + 2e– → 2Br– 1.09
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