Which of the following metals can be extracte | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The alkali leaching process is commonly used for the extraction of $Al$ (from bauxite ore) and $Au$ or $Ag$ (from their respective ores).In the ca

Vedclass · Accepted Answer

$Au$

Vedclass · Answer

(D) The alkali leaching process is commonly used for the extraction of $Al$ (from bauxite ore) and $Au$ or $Ag$ (from their respective ores).In the case of gold $(Au)$,the ore is treated with a dilute solution of sodium cyanide $(NaCN)$ in the presence of air $(O_2)$,which acts as a source of oxygen.The chemical reaction is: $4Au(s) + 8CN^-(aq) + 2H_2O(aq) + O_2(g) \rightarrow 4[Au(CN)_2]^-(aq) + 4OH^-(aq)$.Thus,$Au$ is extracted using this leaching technique.

Which of the following metals can be extracted through alkali leaching technique?

Similar Questions

In the purification of bauxite by Hall's process:

How is leaching carried out in case of low grade copper ores?

Froth-floatation method is successful in separating impurities from ores because

The process which involves the treatment of the ore with a suitable reagent so as to make it soluble but not the impurities is called:

The ore which is purified by the leaching process is

Vedclass Test Series

Exam Paper Generator

Online Exam Module