Question

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

• A. $+2,+3$ in haematite and $+3$ in magnetite
• B. $+2,+3$ in haematite and $+2$ in magnetite
• C. $+2$ in haematite and $+2,+3$ in magnetite
• D. $+3$ in haematite and $+2,+3$ in magnetite

Answer 1

The correct option is D $+3$ in haematite and $+2,+3$ in magnetite

(i) Haematite is $F{e}_2{O}_3$ In which $Fe$ is present in $+3$ oxidation state.
(ii) Magnetite $\left(F{e}_4{O}_3\right)$ is an equimolar mixture
of $FeO$ and $F{e}_2{O}_3$.
Oxidation state Of $Fe$ in $FeO$ is $+2$
Oxidation state of $Fe$ in $F{e}_2{O}_3$ is $+3$