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An iron grill is kept for one week under different conditions. Under which condition is it most likely to rust?

Answer and explanation

Correct answer: In moist air

Rusting is a corrosion process in which iron is slowly oxidised in the presence of oxygen and water. Moist air supplies both necessary conditions at the surface of the grill, so rust is most likely to form there. Dry oxygen lacks moisture, and oxygen-free water lacks the oxidising gas needed for ordinary rusting. Carbon dioxide alone does not provide the complete required conditions. Thus option C is correct.

Related tags

RustingCorrosionIronMoistureOxidationChemical ReactionsChemical Reactions And EquationsChemical Substances – Nature And Behaviour

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