Question 1
Question detail
Which of the following statements about galvanising is true?
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 involves coating iron with copper
- B. It protects iron by creating a barrier against air and water
- C. It is only effective in dry environments
- D. It requires the use of high temperatures
Answer
The correct option is It protects iron by creating a barrier against air and water. This answer is correct because it matches the approved learning objective to describe galvanising as using zinc to protect iron. (Chemistry only) in the subtopic Corrosion and its prevention.
Explanation
The correct option is It protects iron by creating a barrier against air and water. It protects iron by creating a barrier against air and water is correct because it directly supports the approved learning objective to describe galvanising as using zinc to protect 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 Galvanising
Students often think galvanising involves coating iron with zinc to prevent rusting, but they confuse it with other protective methods.
Clarify that galvanising specifically refers to the process of applying a protective zinc coating to iron to prevent corrosion.
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