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Give an example of a sulphide ore which is reduced to metal by heating alone, i.e.,by roasting

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asked Jan 16, 2018 in Chemistry by sforrest072 (157,439 points) ● 60 ● 409 ● 937
Give an example of a sulphide ore which is reduced to metal by heating alone, i.e.,by roasting

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answered Jan 16, 2018 by faiz (82,347 points) ● 6 ● 6 ● 11
edited Jan 25, 2018 by Vikash Kumar
 
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Cinnabar (HgS) on roasting is first changed to mercuric oxide which on further heating is reduced to mcrcury.
2HgS(s) + 3O2(g)  +Heat  ---->2HgO(s) +      2SO2(g)
                2HgO(s)+Heat    ----> 2Hg(l) +O2(g)

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