Silver metal is extracted by cyanide process from silver glance `(Ag_(2)S)`. The ore is concentrated through forth floatation process. The concentrated ore is then leached and solution is treated with reducing agent to get spongy silver which is then purified by fusion with an oxidsing agent followed by electrolysis.A. Silver is precipitated from an aqueous solution of sodium argntocyanide by addingB. Zinc dustC. Copper powderD. Sodium amalgam

Silver metal is extracted by cyanide process from silver glance `(Ag_(

1.	Silver metal is extracted by cyanide process from silver glance `(Ag_(2)S)`. The ore is concentrated through forth floatation process. The concentrated ore is then leached and solution is treated with reducing agent to get spongy silver which is then purified by fusion with an oxidsing agent followed by electrolysis.A. Silver is precipitated from an aqueous solution of sodium argntocyanide by addingB. Zinc dustC. Copper powderD. Sodium amalgam
Answer» Correct Answer - A `2Na[Ag(CN)_(2)]+underset("dust")(Zn) to underset(["Via Hydrometallurgical process"])(Na[Zn(CN)_(4)]+2Ag)`

Discussion

No Comment Found

Related InterviewSolutions

An important ore of zinc metal is:A. CalamineB. CryoliteC. GibsiteD. Malachite
An important oxide ore if iron isA. HaematiteB. SideriteC. PyritesD. Malachite
Which of the following faction is of no significance for roasting sulphide ores to the oxide and not subjecting the sulphide ores in carbon reduction directly ?A. `CO_(2)` is thermodynamically more stable than `CS_(2)`B. Metal sulphides are less stable than the corresponding oxidesC. `CO_(2)` is more volatile than `CS_(2)`D. Metal sulphides are thermodynamically more stable than `CS_(2)`
Commercially important ore of Lead isA. SideriteB. HaematiteC. GalenaD. None of these
Which of the following srtatement above the advantage of masting of sulphide are before reduction is not true?A. Carbon and hydrongen are suitable reducing agents for metal sulphidesB. The `Delta""_(r)G^(0)` of the sulphide is greater than those for `CS_(2) and H_(2)S`C. The `Delta""_(r)G^(0)` is negative for roasting for sulphide ore to oxideD. Reasting of the sulphide to the oxide is thermodynamially feasible
The reduction of zinc oxide with coke occurs at temperatureA. Greater than that for CuOB. Less than that for CuOC. Less than that for `Ag_(2)O`D. Equal to that for CuO
In blast furnace, iron oxide is reduced byA. SilicaB. COC. CarbonD. Lime stone
The important advantage(s) of Lintz and Donawitz (L.D.) process for the manufacture of steel is (are)A. The process is very quickB. Operation costs are lowC. Better quality steel is obtainedD. Scrap iron can be used
The metallurgical process in which a metal is obtained in a fused state is calledA. SmeltingB. RoastingC. CalcinationD. Forth floatation
In the metallurgical extraction of zince from `ZnO` the reducting agent used isA. Carbon monoxideB. Sulphure dioxideC. Carbon dioxideD. Nitric oxide

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment