Question detail
What is the role of scrap iron in the displacement method of copper extraction?
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. It acts as a catalyst
- B. It displaces copper from its compound
- C. It provides energy for the reaction
- D. It purifies the copper
Answer
The correct option is It displaces copper from its compound. This answer is correct because it matches the approved learning objective to describe how copper can be obtained from solutions of copper compounds by displacement using scrap iron. (HT only) in the subtopic Alternative methods of extracting metals.
Explanation
The correct option is It displaces copper from its compound. It displaces copper from its compound is correct because it directly supports the approved learning objective to describe how copper can be obtained from solutions of copper compounds by displacement using scrap iron. (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 Displacement with Electrolysis
Students often confuse the process of obtaining copper from solutions of copper compounds by displacement using scrap iron with electrolysis.
Do not treat this as a general statement about HT only. Instead, answer by clearly linking the correction to describe how copper can be obtained from solutions of copper compounds by displacement using scrap iron. (HT only) in Alternative methods of extracting metals. This keeps the response inside Using the Earth's resources and obtaining potable water and prevents a vague or off-topic GCSE answer. The mistake to avoid is: students often confuse the process of obtaining copper from solutions of copper compounds by displacement using scrap iron with electrolysis.
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