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The reddish–brown rust on iron roofing sheets consists of

Chemistry
JAMB 2017

The reddish–brown rust on iron roofing sheets consists of

  • A. Fe3 + (H2O)6
  • B. FeO.H2O
  • C. Fe2O3.XH2O
  • D. Fe3O4.2H22O
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Correct Answer: Option C
Explanation

Iron [Fe] reacts with H2 in the presence of oxygen to form a rust.

4Fe + 3O2 → 2 Fe2O2

Fe2O3 + H2O → Fe2O3.H2O

There is an explanation video available below.

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Explanation Video

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