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The diagrams below represent two iron nails with some parts covered tightly with zinc and tin respectively. What observations would be made at the exposed points R and Z if the wrapped nails are left in the open for several days? Explain.
diagram with two iron nails with zinc and tin

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  1. At R: No rusting occurred. Zinc is more reactive than iron hence it reacts with moist air instead of iron.
  2. At Z: Rusting occurred. Tin is less reactive than iron hence iron reacts with moist air to form rust.
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