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Answer the following questions briefly. ...

Answer the following questions briefly.
(i) What is the actual reducing agent of haematite in blast furnace ?
(ii) Give the equations for the recovery of lead from galena by air reduction.
(iii) Why is sodium chloride added during electrolysis of fused anhydrous magnesium chloride.
(iv) Zinc, not copper, is used for the recovery of metallic silver from the complex `[Ag(CN)_(2)]`. Explain.
(v) Why is chalcocite roasted and not calcinated during recovery of copper ?

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Reducing agent of haematite in blast - furnace is

The actual reducing agent of haematite in blast furnace is ..........

(a). Why sodium chloride is added during electrolysis of fused anhydrous magnesium chlroride? (b). Why magnesium oxide is used for the lining of steel making furnace?

Why is Zn but not copper used for the recovery of Ag from its cyanide complex [Ag(CN)_(2)]^(-)

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