how rust forms? explain in brief.
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Explanation:
Rust forms when iron and oxygen react in the presence of water or moisture in the air. ... Rust occurs when iron or its alloys, such as steel, corrode. The surface of a piece of iron will corrode first in the presence of oxygen and water. Given enough time, any piece of iron will change entirely into rust and disintegrate.
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Answer:
when some reddish brown structure formed on the surface of iron it is called rust Fe2O3
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