Question detail
What role does water play in the 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. It acts as a catalyst.
- B. It provides electrons.
- C. It facilitates the reaction with oxygen.
- D. It prevents the formation of rust.
Answer
The correct option is It facilitates the reaction with oxygen.. 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 It facilitates the reaction with oxygen.. It facilitates the reaction with oxygen. 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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