IIT-JEE 2011 · Paper 2 · Chemistry Q1

ChemistrySingle correct+3 / -1Question 1 of 60

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

II, III in haematite and III in magnetite

II, III in haematite and II in magnetite

II in haematite and II, III in magnetite

III in haematite and II, III in magnetite

Answer and worked solution

Official answer: D

Formulae. Haematite is $\ce{Fe2O3}$ : iron is +3. Magnetite is $\ce{Fe3O4}=\ce{FeO.Fe2O3}$ : iron is +2 and +3.

(D)

Topics:Oxidation number Transition element properties

IIT-JEE 2011 · Paper 2, Chemistry question 1