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Oxidation states of the metal in the minerals covellite and chalcocite, respectively are:

Option: 1

I in covellite and I in chalcocite


Option: 2

III in covellite and II in chalcocite


Option: 3

III in covellite and III in chalcocite


Option: 4

II in covellite and II in chalcocite


Answers (1)

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The minerals covellite and chalcocite both contain the same metal, which is copper \text{(Cu)}, but they have different compositions.

Covellite is copper sulfide \text{(CuS)}. In covellite, copper \text{(Cu)} has an oxidation state of +1 , and sulfur (\mathrm{S}) has an oxidation state of -2 .
Chalcocite is also a copper sulfide mineral \left(\mathrm{Cu}_2 \mathrm{~S}\right). In chalcocite, copper \text{(Cu)} has an oxidation state of +1 , and sulfur (\mathrm{S}) has an oxidation state of -2 .
Therefore, the oxidation state of the metal \text{(copper)} in both covellite and chalcocite is +1.

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Shailly goel

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