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  • Oxidation states of the metal in the minerals galena and cerussite, respectively are:  Option: 1 IV in galena and II in cerussite

Oxidation states of the metal in the minerals galena and cerussite, respectively are:
 

Option: 1

IV in galena and II in cerussite
 


Option: 2

IV in galena and IV in cerussite
 


Option: 3

II in galena and II in cerussite
 


Option: 4

II in galena and IV in cerussite


Answers (1)

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The minerals galena and cerussite contain different metals, so their oxidation states will be different.

Galena is primarily composed of lead sulfide \text{(PbS)}. In this mineral, lead \text{(Pb)} has an oxidation state of +2 . Sulfur \text{(S)} has an oxidation state of -2 .

Cerussite is a lead-carbonate mineral \left(\mathrm{PbCO}_3\right). In cerussite, lead (\mathrm{Pb}) also has an oxidation state of +2 , as it commonly exhibits the same oxidation state in its compounds. Carbon (\mathrm{C}) in carbonate has an oxidation state of +4 , while oxygen (\mathrm{O}) has an oxidation state of -2 .

Therefore, the oxidation state of the metal (lead) in galena and cerussite is +2 in both minerals.

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