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

STATEMENT-1 : Zince and not copper is used in the recovery of silver from the complex [Ag(CN)_(2)]^(-) and STATEMENT-2 : Zince is more powerful oxidising agent than copper.

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 ?

Assertion : Zinc is used for the recovery of silver from the complex [Ag(CN)_(2)]^(-) Reason : Zinc is more electropositive than silver and is a better reducing agent.

The hybridization of Ag in the linear complex [Ag(NH_(3))_(2)]^(+) is

The sum of oxidation state of complex [Ag(NH_3)_2][Ag(CN)_2] is: