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What is the chemical formula of rust, which is formed on the surface of iron in the ...

What is the chemical formula of rust, which is formed on the surface of iron in the presence of oxygen and moisture?
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • A Fe\(_3\)O\(_4\)
  • B FeO
  • C Fe(OH)3
  • D Fe\(_2\)O\(_3\)
Correct Answer: Option D
Explanation:
Rust is a reddish-brown compound that forms on the surface of iron in the presence of oxygen and moisture. Its chemical formula is Fe\(_2\)O\(_3\), indicating the presence of two iron atoms and three oxygen atoms in the compound.

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