KCET · Chemistry · General Principles and Processes of Isolation of Metals
In chromite ore, the oxidation number of iron and chromium are respectively
- A \(+3\), \(+2\)
- B \(+3,+6\)
- C \(+2,+6\)
- D \(+2,+3\)
Answer & Solution
Correct Answer
(D) \(+2,+3\)
Step-by-step Solution
Detailed explanation
Chromite ore is \(\mathrm{FeCr}_{2} \mathrm{O}_{4}\), ie, \(\mathrm{FeO}, \mathrm{Cr}_{2} \mathrm{O}_{3}\) O.N. of \(\mathrm{Fe}=+2 ; \quad\) O.N. of \(\mathrm{Cr}=+3\).
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