Respuesta :

Answer:

3

Explanation:

The reaction for the extraction of Iron is :-

2Fe2O3(s) + 3C(s) → 4Fe(l) + 3CO2(g)

  • O.S. of Fe in Fe2O3 is 3
  • and O.S. of Fe(l) is 0

change in oxidation state (O.S.) = higher O.S - lower O.S

= 3 - 0

= 3

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