Oxidation & Reduction in Terms of Oxygen Quiz
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5 questions, one answer each
Each answer is checked as you go, with why.
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1. What is oxidation in terms of oxygen?
- A. Loss of oxygen
- B. Gain of oxygen
- C. Gain of electrons
- D. Loss of hydrogen
2. What is reduction in terms of oxygen?
- A. Gain of oxygen
- B. Loss of oxygen
- C. Loss of electrons
- D. Gain of hydrogen
3. In the blast furnace reaction iron oxide + carbon → iron + carbon dioxide, which substance is reduced?
- A. Carbon, because it gains oxygen
- B. Iron oxide, because it loses oxygen
- C. Carbon dioxide, because it is a product
- D. Iron, because it is a metal
4. When a hydrocarbon fuel burns completely in air, what type of reaction does the fuel undergo?
- A. Reduction, because it loses hydrogen
- B. Oxidation, because it gains oxygen
- C. Neutralisation
- D. No reaction, because oxygen is unreactive
5. A student is asked to define reduction 'in terms of oxygen' but writes 'reduction is the gain of electrons'. Why would this likely lose the mark?
- A. Because the definition is factually wrong in all contexts
- B. Because the question specifically asked for the oxygen-based definition, not the electron-based one
- C. Because reduction cannot be defined using electrons
- D. Because gain of electrons always means oxidation