Tag: extraction of copper and zinc from their oxides

$2Cu _2O\, +\, Cu _2S\, \rightarrow\, 6Cu\, +\, SO _2$

$2CuFeS _2\, +\, O _2\, \rightarrow\, Cu _2S\, +\, FeS\, +\, SO _2$

$2Cu _2S\, +\, 3O _2\, \rightarrow\, 2Cu _2O\, +\,2SO _2$

$2FeS\, +\, 3O _2\, \rightarrow\, 2FeO\, +\, 2SO _2$

$Cu _2S\,+\,2FeO\,\rightarrow\,2Cu\,+\,2Fe\,+\,SO _2$

$Cu _2S\,+\,2Cu _2O\,\rightarrow\,6Cu\,+\,SO _2$

$4Cu _2O\,+\,FeS\,\rightarrow\,8Cu\,+\,2FeSO _4$

$2Cu _2O\,+\,FeS\,\rightarrow\,4Cu\,+\,Fe\,+\,SO _2$

$Cu _2S, Cu _2O$ and silica

$Cu _2S, CuO$ and silica

$Cu _2S, FeO$ and silica

$Cu _2S, FeS$ and silica

Bessemer converter

Blast furnace

Both (A) and (B)

None of these

In the smelting step, carbon reduction takes places

During roasting, $Cu _2S$ remains almost unaffected

In Bessemer converter, only self reduction occurs, not slag formation

Blister formed in the blister Cu is due to dissolved $CO _2$

Cu and Pb

Zn and Hg

Cu and AI

Fe and Pb

electrolytic reduction

roasting followed by reduction with carbon

roasting followed by reduction with another metal

none of these

$CuFeS _2$

$CuCO _3$

$CuCO _3.Cu(OH) _2$

$Cu(OH) _2$

${Cu _2S+2Cu _2O\rightarrow 6Cu+SO _2}$

${Cu _2S\rightarrow 2Cu+S}$

${Fe+Cu _2O\rightarrow 2Cu+FeO}$

${2Cu _2O\rightarrow 4Cu+O _2}$

True

False