Question detail
What is a characteristic of aluminium alloys?
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. They are high density materials.
- B. They are low density materials.
- C. They are brittle and hard.
- D. They are pure metals.
Answer
The correct option is They are low density materials.. This answer is correct because it matches the approved learning objective to describe aluminium alloys as low density materials. (Chemistry only) in the subtopic Alloys as useful materials.
Explanation
The correct option is They are low density materials.. They are low density materials. is correct because it directly supports the approved learning objective to describe aluminium alloys as low density materials. (Chemistry only). This belongs to the subtopic Alloys as useful materials 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 Alloys as useful materials.
Common mistake
Misunderstanding Density
Students often confuse low density with lightweight materials, thinking all low-density materials are weak or fragile.
Emphasize that low density refers to the mass per unit volume and does not necessarily indicate strength; aluminium alloys can be both low density and strong.
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