Question detail
Which of the following statements is true about rusting?
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. Rusting can occur in dry conditions.
- B. Rusting requires both air and water.
- C. Rusting is a process that only affects aluminum.
- D. Rusting can be prevented by exposure to sunlight.
Answer
The correct option is Rusting requires both air and water.. This answer is correct because it matches the approved learning objective to explain that both air and water are needed for iron to rust. (Chemistry only) in the subtopic Corrosion and its prevention.
Explanation
The correct option is Rusting requires both air and water.. Rusting requires both air and water. is correct because it directly supports the approved learning objective to explain that both air and water are needed for iron to rust. (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
Common Misunderstanding of Rusting
Students often think that only one of air or water is needed for iron to rust, believing that either can be sufficient on its own.
Emphasize that both air and water are essential for the rusting process to occur, as they work together to facilitate the chemical reactions that lead to corrosion.
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