Considering Ellingham diagram, which of the following metals can be used to reduce alumina?
Extraction of gold and silver involves leaching with CN- ion. Silver is later recovered by:
2. Zone refining
3. Displacement with Zn
Match items of Column I with the items of Column II and assign the correct code.
|Column I||Column II|
|A) Cyanide process||1) Ultra pure Ge|
|B) Froth floatation
|2) Dressing of ZnS|
|C) Electrolytic||3) Extraction of Al
|D) Zone refining||4) Extracting of Au|