Q. 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
D) III in haematite and II, III in magnetite
Explanation
(d)
Haematite is ${Fe}_{2}O_{3},\$in which oxidation number of iron is III.
Magnetite is ${Fe}_{3}O_{4}$ which is infact a mixed oxide $\left( FeO.{Fe}_{2}O_{3}. \right),$ hence iron is present in both II and III oxidation state.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.