The chemical formula of rust is:
2024
The chemical formula of rust is:
- A.
Fe₂O₃
- B.
Fe
- C.
FeO
- D.
FeSO₄
- E.
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Correct answer: A
Rust is formed when iron reacts with oxygen and moisture in the air. Chemically, rust is hydrated iron(III) oxide.
The actual composition of rust is:

However, in competitive examinations and basic chemistry questions, rust is usually represented as: Fe₂O₃
Therefore:
Correct Answer: A) Fe₂O₃
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