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What substance is formed on iron during rusting?

Answer and explanation

Correct answer: Reddish-brown, flaky substance

During rusting, iron reacts slowly with oxygen in the presence of water or moisture and forms hydrated iron(III) oxide. This corrosion product is called rust and appears as a reddish-brown, flaky coating, so option A is correct. It is a solid deposit, not a blue liquid or green gas; the appearance also does not match a bright white solid.

Related tags

Class 10 ScienceChemical ReactionsRustingIronCorrosionHydrated Iron OxideChemical Reactions And EquationsChemical Substances – Nature And Behaviour

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