Chemistry - Metallurgy Question with Solution | TestHub

Iron is in +3 oxidation state in Haematite and +2 and +3 states in Magnetite.
Haematite:$\mathrm{F}{\mathrm{e}}_2{\mathrm{O}}_3:2\mathrm{x}+3\times (-2)=0$
$\mathrm{x}=3$
Magnetite:$\mathrm{F}{\mathrm{e}}_2{\mathrm{O}}_4$[an equimolar mixture of FeO and$\mathrm{F}{\mathrm{e}}_2{\mathrm{O}}_3$]
$\mathrm{F}\mathrm{e}\mathrm{O}$:$\mathrm{x}-2=0$
$\mathrm{x}=2$
$\mathrm{F}{\mathrm{e}}_2{\mathrm{O}}_3$:$\mathrm{x}=3$