Question
Chemistry Question on General Principles and Processes of Isolation of Elements
In isolation of which one of the following metals from their ores, the use of cyanide salt is not commonly involved?
A
Zinc
B
Gold
C
Silver
D
Copper
Answer
Copper
Explanation
Solution
The correct option is(D): Copper
In the extraction of Silver and Gold, NaCN is used to leach the metal.
For ZnS, KCN is used as depressant.
For Gold and silver ⇒ leaching [Cyanide process]