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Grade 12Inorganic Chemistry

which of the following reactions is an example of autoreduction?

1.FeS+3/2(O2)----->FeO+SO2

2.FeO+SiO2------>FeSiO3.

3.Cu2O+1/2(Cu2S)------>3Cu+1/2(SO2).

4.Cu2S+3/2(O2)-------->Cu2O+SO2.

Profile image of G Narayana Raju
14 Years agoGrade 12
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1 Answer

Profile image of Sunil Kumar FP
12 Years ago
reduction reaction is a type of reaction in which the oxidation number decreases
in case of 3rdreaction the oxidation number changes from +1 to 0 so the elment reduces its oxidation number
Cu2O+1/2(Cu2S)------>3Cu+1/2(SO2
in case ofFeS+3/2(O2)----->FeO+SO2 andCu2S+3/2(O2)-------->Cu2O+SO2.the oxidation number does not change it remins same

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