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Oxidation States of Lanthanides

In chromite o...

Question

In chromite ore, the oxidation number of iron and chromium are respectively

A

+3, +2

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B

+3, +2

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C

+2, +6

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D

+2, +3.

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Solution

The correct option is D +2, +3.
Chromite ore is $F e C r_{2} O_{4}$ or $F e O . C r_{2} O_{3}$ . Oxidation state of Fe = +2, Cr= +3.

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