Chemistry Medium fpsc ppsc nts

What is the chemical formula for rust formed on iron?

  • A Fe2O
  • B Fe3O4
  • C FeO
  • D Fe2O3
Correct Answer: Option B — Fe3O4
Explanation:
Rust is hydrated iron oxide with the formula Fe2O3 nH2O formed when iron reacts with oxygen and moisture through an electrochemical oxidatio...
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