Q28 / 76 · NTA Abhyas (JEE Main) 2020 · Chemistry · General Principles and Processes of Isolation of Metals

Oxidation states of the metal in the minerals haematite and magnetite, respectively, are

  • A
    II, III in haematite and III in magnetite
  • B
    II, III in haematite and II in magnetite
  • C
    II in haematite and II, III in magnetite
  • Correct answer
    D
    III in haematite and II, III in magnetite

Solution

Hematite is a common iron oxide with a formula of Fe2O3 so Fe in it has +3 oxidation state.
Magnetite is a rock mineral and one of the main iron ores, with the chemical formula Fe3O4 or Fe2O3.FeO .so it is a mixed oxide with oxidation states of Fe as +3 and +2.

Hence, the correct answer is option: 'D'.

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