R3.2 Electron transfer reactions Quiz
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5 questions, one answer each
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1. What is the oxidation state of nitrogen in NH₄⁺?
- A. −4
- B. −3
- C. +3
- D. +5
2. In Zn + Cu²⁺ → Zn²⁺ + Cu, which species is reduced?
- A. Zn
- B. Cu²⁺
- C. Zn²⁺
- D. Cu
3. Which reaction occurs?
- A. Br₂ + 2Cl⁻ → 2Br⁻ + Cl₂
- B. I₂ + 2Br⁻ → 2I⁻ + Br₂
- C. Cl₂ + 2I⁻ → 2Cl⁻ + I₂
- D. I₂ + 2Cl⁻ → 2I⁻ + Cl₂
4. What is formed at the cathode when molten magnesium chloride is electrolysed?
- A. Chlorine
- B. Hydrogen
- C. Magnesium
- D. Oxygen
5. What is obtained when ethanol is heated under reflux with excess acidified dichromate(VI)?
- A. Ethanal
- B. Ethanoic acid
- C. Propanone
- D. Ethene