CH-1558
Rusting
Chemistry · Secondary 4 · Medium · Rusting
An iron nail is coated with a thin layer of zinc. The coating is scratched so that bare iron is exposed.
Which statement best explains why the iron does not rust quickly in damp air?
Which statement best explains why the iron does not rust quickly in damp air?
- Zinc is more reactive than iron and is preferentially oxidised, protecting the iron.
- Zinc is less reactive than iron and prevents oxygen from reaching the iron.
- Zinc reacts with water to form a protective layer of rust on the iron.
- Zinc absorbs all the moisture so the iron stays completely dry.
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