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MMLU / Which of the following is a reduction half-reaction? (1) Cu2+ + e- → Cu+ (2) Cu+…

Problem

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question

Which of the following is a reduction half-reaction? (1) Cu2+ + e- → Cu+ (2) Cu+ + e- → Cu0 (3) Fe2+ → Fe3+ + e-

choices

  1. 1 only because copper(II) ions are reduced
  2. 3 only because the iron is reduced
  3. 1 and 2 because they both reduce copper ions
  4. 1 and 3 because they do not have insoluble ions

subject

high_school_chemistry

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