Question detail
What is the main reason aluminium is used in construction and packaging?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Using materials
Question
- A. It is very heavy.
- B. It is expensive.
- C. It resists corrosion due to its oxide coating.
- D. It is a poor conductor of electricity.
Answer
The correct option is It resists corrosion due to its oxide coating.. This answer is correct because it matches the approved learning objective to explain why aluminium resists further corrosion because of its oxide coating. (Chemistry only) in the subtopic Corrosion and its prevention.
Explanation
The correct option is It resists corrosion due to its oxide coating.. It resists corrosion due to its oxide coating. is correct because it directly supports the approved learning objective to explain why aluminium resists further corrosion because of its oxide coating. (Chemistry only). This belongs to the subtopic Corrosion and its prevention within Using materials, 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 Corrosion and its prevention.
Common mistake
Aluminium Corrosion Resistance
Students often think that aluminium does not corrode at all.
Explain that aluminium does corrode, but the oxide coating that forms protects it from further corrosion.
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