HKDSE (Hong Kong) · Chemistry

Redox and Chemical Cells

13 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 13 questions

  1. What is the oxidation number of Fe in FeCl?
  2. What is the oxidation number of Mn in MnO?
  3. What is the oxidation number of S in SO?
  4. What is the oxidation number of S in SO?
  5. What is the oxidation number of S in HSO?
  6. What is the oxidation number of N in HNO?
  7. What is the oxidation number of Cu in CuO?
  8. What is the oxidation number of Mn in KMnO?
  9. What is the oxidation number of O in HO?
  10. What is the oxidation number of C in CH?
  11. In a reaction an element loses electrons. What happens to that element?
  12. In the electrolysis of molten lead(II) bromide, what is formed at the cathode?
  13. In a simple cell made from zinc and copper in dilute sulfuric acid, which is the negative electrode?

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