Question detail
What is the role of chromium in stainless steel?
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. To increase strength
- B. To improve ductility
- C. To enhance corrosion resistance
- D. To reduce weight
Answer
The correct option is To enhance corrosion resistance. This answer is correct because it matches the approved learning objective to describe stainless steel as containing chromium and nickel and being hard and corrosion resistant. (Chemistry only) in the subtopic Alloys as useful materials.
Explanation
The correct option is To enhance corrosion resistance. To enhance corrosion resistance is correct because it directly supports the approved learning objective to describe stainless steel as containing chromium and nickel and being hard and corrosion resistant. (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 Stainless Steel Composition
Students often think that stainless steel is made only of iron and does not contain other elements.
Emphasize that stainless steel contains chromium and nickel, which contribute to its hardness and corrosion resistance.
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