Extracting and Using Metals Quiz
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5 questions, one answer each
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1. What does bioleaching use to produce a leachate solution containing metal compounds?
- A. Plants
- B. Bacteria
- C. Acid rain
- D. Electricity
2. What two conditions are needed for iron to rust?
- A. Heat and light
- B. Air and water
- C. Acid and oxygen
- D. Salt and pressure
3. What metals combine to make brass?
- A. Copper and tin
- B. Copper and zinc
- C. Iron and carbon
- D. Aluminium and zinc
4. How does sacrificial protection prevent corrosion?
- A. By coating the metal in grease
- B. By attaching a more reactive metal that corrodes instead
- C. By removing all water from the environment
- D. By painting the metal a bright colour
5. A company wants to extract copper from a very low-grade ore where traditional mining would not be economical, and then obtain pure copper metal from the resulting solution without using electricity. Which two-step approach fits this best?
- A. Phytomining, then aerobic digestion
- B. Bioleaching to produce a leachate solution, then displacement using scrap iron
- C. Fractional distillation, then filtration
- D. Sacrificial protection, then galvanising