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  • Oxidation states of the metal in the minerals magnetite and chromite, respectively are:Option: 1 II, III in magnetite and II, III in chromite</di

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

Option: 1

II, III in magnetite and II, III in chromite


Option: 2

II, III in magnetite and II in chromite


Option: 3

II in magnetite and II, III in chromite


Option: 4

III in magnetite and II, III in chromite


Answers (1)

best_answer

In the mineral magnetite \left(\mathrm{Fe}_3 \mathrm{O}_4\right), the metal iron Fe can exist in two different oxidation states:+2 and +3. The structure of magnetite consists of both \mathrm{Fe}(\mathrm{II}) and \mathrm{Fe}(\mathrm{III}) ions, with a ratio of two Fe(II) ions for every three Fe(III) ions. Therefore, the oxidation states of the metal in magnetite are II and III.

In the mineral chromite ( \left.\mathrm{FeC} r_2 \mathrm{O}_4\right), the metal iron Fe exists in the oxidation state of +2 (II). Chromite is an iron chromium oxide mineral, and the oxidation state of chromium Cr in chromite is +3 as well.
Hence, the correct answer is (1) II, III in magnetite and II, III in chromite.

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shivangi.shekhar

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