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Question: Answered & Verified by Expert
Oxidation states of the metal in the minerals haematite and magnetite respectively are
ChemistryGeneral Principles and Processes of Isolation of MetalsNEET
Options:
  • A II, III in haematite and II in magnetite
  • B II, III in haematite and III in magnetite
  • C III in haematite and II, III in magnetite
  • D II in haematite and II, III in magnetite
Solution:
2705 Upvotes Verified Answer
The correct answer is: III in haematite and II, III in magnetite
Iron is in +3 oxidation state in Haematite and +2 and +3 states in Magnetite.
Haematite: Fe2O3:2x+3×(-2)=0
x=3
Magnetite: Fe2O4 [an equimolar mixture of FeO and Fe2O3 ]
FeO : x-2=0
x=2
Fe2O3 : x=3

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