Question detail
What is the main reason new copper extraction methods are needed?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Using the Earth's resources and obtaining potable water
Question
- A. High-grade copper ores are becoming scarce
- B. Copper is too expensive to extract
- C. Copper extraction is harmful to the environment
- D. Copper cannot be recycled
Answer
The correct option is High-grade copper ores are becoming scarce. This answer is correct because it matches the approved learning objective to describe how copper can be obtained from solutions of copper compounds by electrolysis. (HT only) in the subtopic Alternative methods of extracting metals.
Explanation
The correct option is High-grade copper ores are becoming scarce. High-grade copper ores are becoming scarce is correct because it directly supports the approved learning objective to describe how copper can be obtained from solutions of copper compounds by electrolysis. (HT only). This belongs to the subtopic Alternative methods of extracting metals within Using the Earth's resources and obtaining potable water, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Alternative methods of extracting metals.
Common mistake
Confusing Electrolysis with Other Methods
Students often confuse electrolysis with other methods of copper extraction, such as displacement or reduction with carbon.
To fix this, students should focus on the specific process of electrolysis, understanding that it involves using an electric current to separate copper ions from a solution.
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