Question
Extraction of zinc from zinc blende is achieved by
A.
roasting followed by self-reduction
B.
electrolytic reduction
C.
roasting followed by reduction with carbon
D.
roasting followed by reduction with another metal
Answer :
roasting followed by reduction with carbon
Solution :
Extraction of $$Zn$$ from zinc blends is achieved by roasting followed by reduction with carbon. Reactions involved are :
\[\begin{align}
& 2ZnS+3{{O}_{2}}\xrightarrow{\text{heat}}2ZnO+2S{{O}_{2}}\text{(Roasting)} \\
& ZnO+C\text{(Coke)}\xrightarrow{\text{heat}}Zn+CO\text{(Reduction)} \\
\end{align}\]