Oxidizing Reducing Agents Quiz Online Practice Test

1. By which method can oxygen be converted into ozone?

2. Identify the incorrect statement regarding oxygen:

3. When the violet color of acidified KMnO₄ is decolorized by H₂O₂, what role does H₂O₂ play in this reaction?

4. What role does hydrogen peroxide commonly play?

5. Which elements form neutral oxides?

6. Oxidation can also be described as:

7. Why is potassium iodide (KI) considered a strong reducing agent?

8. Which of the following is not considered an oxidizing agent?

9. How does hydrogen act as a reducing agent?

10. In the reaction between copper oxide (CuO) and carbon monoxide (CO), which substance acts as the reducing agent?

11. In a redox reaction, which species loses electrons?

12. Which species gains electrons in a redox reaction?

13. In the reaction 3Mg + N₂ → Mg₃N₂, which substance acts as the oxidizing agent?

14. In the reaction 3Mg + N₂ → Mg₃N₂, which substance functions as the reducing agent?

15. In the reaction 2Al_(s) + 6H⁺_(aq) → 2Al³⁺_(aq) + 3H₂_(g), which substance serves as the reducing agent?

16. In the reaction 2Al_(s) + 6H⁺_(aq) → 2Al³⁺_(aq) + 3H₂_(g), which substance acts as the oxidizing agent?

17. In the reaction Cr₂O₇²⁻_(aq) + 8H⁺_(aq) + 3H₂S_(aq) → 2Cr³⁺_(aq) + 7H₂O_(l) + 3S_(s), which species is the oxidizing agent?

18. In the reaction Cr₂O₇²⁻_(aq) + 8H⁺_(aq) + 3H₂S_(aq) → 2Cr³⁺_(aq) + 7H₂O_(l) + 3S_(s), which species functions as the reducing agent?

19. In the electrochemical cell Pt_(s) | Sn²⁺_(aq), Sn⁴⁺_(aq) || Cr³⁺_(aq), Cr²⁺_(aq) | Pt_(s), which species acts as the reducing agent?

20. In the electrochemical cell Pt_(s) | Sn²⁺_(aq), Sn⁴⁺_(aq) || Cr³⁺_(aq), Cr²⁺_(aq) | Pt_(s), which species serves as the oxidizing agent?