Rusting of iron involves a chemical reaction which is a combination of:

  1. Reduction as well as combination reactions
  2. Oxidation as well as combination reactions
  3. Reduction as well as displacement reactions
  4. Oxidation as well as displacement



  1. Oxidation as well as combination reactions


Explanation : The chemical reaction involved in rusting of iron is -

Iron + Oxygen + Water → Hydrated Iron Oxide

4Fe + 3O 2 + 2xH 2 O → 2Fe 2 O 3 .xH 2 O


It is an oxidation reaction as Iron gains Oxygen while forming Iron Oxide.

It is a combination reaction as more than 2 substances (Iron, Oxygen and Water) react to form a single product.

  1. Class 10
  2. Chapter 1 Class 10 - Chemical Reactions and Equations

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo