Question

Froth flotation $\to$Roasting$\to$Reduction$\to$Electrolysis
The above processes are used in the extraction of:

• A. Cu from $CuFe{S}_2$
• B. Zn from $ZnS$
• C. Fe from $F{e}_2{O}_3$
• D. Al from $A{l}_2{O}_3.2H_{2}O$

Answer 1

Answer: (A), (B)

Zn from $ZnS$

Extraction of Fe involves
Crushing$\to$Roasting/Calcination$\to$Reduction.
Extraction of Aluminium involves
Digestion$\to$Heating$\to$Electrolysis.
Froth flotation is used for sulfide ores.