Obtaining & Using Metals Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. Why is gold found uncombined in the Earth's crust?
- A. It is very reactive
- B. It is very unreactive and does not readily form compounds
- C. It is a non-metal
- D. It only exists as an ore
2. What does extraction of a metal from its ore typically involve?
- A. Oxidation
- B. Reduction
- C. Neutralisation
- D. Sublimation
3. Which method is used to extract aluminium, and why?
- A. Heating with carbon, because it is cheap
- B. Electrolysis, because aluminium is more reactive than carbon
- C. Heating with carbon, because aluminium is less reactive than carbon
- D. Bioleaching, because it is the cheapest method
4. Magnesium is added to copper sulfate solution. What happens?
- A. No reaction, as copper is more reactive
- B. Magnesium displaces copper, forming magnesium sulfate and copper
- C. Copper displaces magnesium
- D. A precipitate of magnesium carbonate forms
5. Which of the following is a benefit of recycling metals?
- A. It always requires more energy than extraction from ore
- B. It increases the need for new mining
- C. It saves energy and preserves raw materials and the environment
- D. It has no economic benefit