Question detail
Which of the following is NOT a characteristic of an alloy compared with a pure metal?
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 contains more than one element in its composition.
- B. Its melting point is usually a single sharp value.
- C. It can exhibit improved corrosion resistance.
- D. Its mechanical properties can be tailored by changing composition.
Answer
The correct option is Its melting point is usually a single sharp value.. This answer is correct because it matches the approved learning objective to distinguish a pure metal from an alloy in terms of composition in the subtopic Alloys as useful materials.
Explanation
The correct option is Its melting point is usually a single sharp value.. Its melting point is usually a single sharp value. is correct because it directly supports the approved learning objective to distinguish a pure metal from an alloy in terms of composition. 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
Confusing Pure Metals and Alloys
Students often think that a pure metal and an alloy have the same composition, not recognizing that alloys are mixtures of different elements.
To fix this, remember that a pure metal consists of only one type of atom, while an alloy contains two or more different elements combined together.
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