Chemistry - Metallurgy Question with Solution | TestHub
A metal " " present as an impurity in metal " ", is refined by liquation. Sulphide of metal " " is separated from sulphide of metal " " by adding KCN during concentration of sulphide of " ". Both " " & " " predominantly have + 2 oxidation state in their compounds.
Which of the following is correct for " "& " "
Options:
Answer:
Solution:
Based on the given clues, is Lead (Pb) and is Zinc (Zn).
Identification: KCN is used as a depressant during froth flotation to separate ZnS () from PbS ().
Oxidation State: Both Pb and Zn show a stable oxidation state in their compounds.
Correct Option (C): In the hydrometallurgical extraction of silver (MacArthur-Forrest process), Zinc (Zn) acts as a reducing agent to precipitate silver from its soluble cyano complex via displacement:
