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Question
What is rust ?
Solution 1
Rust: Rust is hydrated ferric oxide (Fe2O3 . x* H2O), which forms a brownish red coating over iron. (* x can be any number.)
Solution 2
The hydrated oxide of iron formed when iron comes in contact with moist air is called rust. This rust is brownish flaky residue and easily crumbles from the metal surface.
4Fe + 3O2 → 2Fe2O3
Iron Oxygen Ferric oxide
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