Question detail
For Extraction of metals and reduction, which ion focus answer best supports this Unit 4.4 objective: Explain why metals more reactive than carbon cannot be extracted from oxides by carbon reduction?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Reactivity of metals
Question
- A. Carbon is a cheap and abundant resource. - correct ion focus for ore
- B. Wrong ion focus: confuses ore with a nearby Unit 4.4 chemical change idea
- C. Wrong particle check: uses the wrong ion, electrode, acid-base term, or product for Extraction of metals and reduction
- D. Wrong reaction link: does not support Explain why metals more reactive than carbon cannot be extracted from oxides by carbon reduction
Answer
The correct option is Carbon is a cheap and abundant resource. - correct ion focus for ore.
Explanation
The correct option is "Carbon is a cheap and abundant resource. - correct ion focus for ore" because it supports the approved learning objective: Explain why metals more reactive than carbon cannot be extracted from oxides by carbon reduction. The other options are incorrect or weaker because they are vague, use the wrong Chemistry context, or do not clearly explain the answer for Extraction of metals and reduction.
Common mistake
Misunderstanding Reactivity and Extraction
Students often think that all metals can be extracted from their ores using carbon, regardless of their reactivity.
Remember that only metals less reactive than carbon can be extracted from their oxides by reduction with carbon. More reactive metals require different extraction methods.
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