Question detail
What is the primary method to prevent rusting of iron?
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. Applying a barrier coating such as paint or grease
- B. Heating the iron to high temperatures
- C. Mixing iron with other metals
- D. Storing iron in a dry place
Answer
The correct option is Applying a barrier coating such as paint or grease. This answer is correct because it matches the approved learning objective to define corrosion as the destruction of materials by chemical reactions with substances in the environment. (Chemistry only) in the subtopic Corrosion and its prevention.
Explanation
The correct option is Applying a barrier coating such as paint or grease. Applying a barrier coating such as paint or grease is correct because it directly supports the approved learning objective to define corrosion as the destruction of materials by chemical reactions with substances in the environment. (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
Misunderstanding Corrosion
Students often define corrosion only as rusting, failing to recognize it as a broader process affecting various materials.
Emphasize that corrosion is the destruction of materials by chemical reactions with substances in the environment, not limited to just iron or rusting.
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