The reddish–brown rust on iron roofing sheets consists of

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Chemistry JAMB 2017

The reddish–brown rust on iron roofing sheets consists of

  • Fe3 + (H2O)6
  • FeO.H2O
  • Fe2O3.XH2O checkmark
  • Fe3O4.2H22O

The correct answer is: 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 .

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