Q. In chromite ore, the oxidation number of iron and chromium are respectively.
A) +3,+2
B) +3,+6
C) +2,+6
D) +2,+3
Explanation
(d)
Actual composition of chromite ore$(FeCr_{2}O_{4})$ is FeO.${Cr}_{2}O_{3}$. In FeO, the oxidation state of Fe is +2 while in ${Cr}_{2}O_{3}$, the oxidation state of Cr is +3.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.