. When iron combines with oxygen in the air, it becomes rusty.
(a)What is this reaction called?
(b) Is rusting a reversible or irreversible reaction? Explain your answer.
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Answer:a) Oxidation Reaction
b) Irreversible
It reacts with moist air to form a new compound called rust with molecular formula Fe2O3. nH2O. This oxide layer, rust is not stable and falls off after certain time. Thus rusting of iron is irreversible change i.e. Rust once formed can not be converted back into iron.
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