Question detail

What is the main chemical reaction involved in rusting?

Try the question, check the answer, then read the explanation to understand the curriculum point.

Show answer Topic hub Objective page

At a glance

MCQ

Type

practice

Style

Topic

Using materials

Question

A. Iron reacting with carbon dioxide
B. Iron reacting with oxygen and water
C. Iron reacting with sulfur
D. Iron reacting with nitrogen

Answer

The correct option is Iron reacting with oxygen and water. This answer is correct because it matches the approved learning objective to describe rusting as corrosion of iron. (Chemistry only) in the subtopic Corrosion and its prevention.

Explanation

The correct option is Iron reacting with oxygen and water. Iron reacting with oxygen and water is correct because it directly supports the approved learning objective to describe rusting as corrosion of iron. (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 Rusting

Students often describe rusting as the corrosion of all metals, not just iron.

Emphasize that rusting specifically refers to the corrosion of iron.

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