Extraction of zinc from zinc blende is achieved by

Options

A. electrolytic reduction
B. roasting followed by reduction with carbon
C. roasting followed by reduction with another metal
D. roasting followed by self reduction

Answer

B

Explanation

Extraction of zinc from zinc blende is achieved by roasting followed by reduction with carbon. At the roasting stage:
`ZnS + 3/2 O_2 underset(850^@C)overset("above")(rarr)ZnO + SO_2 uarr`
while,
`ZnS + 2O_2 underset(850^@C)overset("below")(rarr) ZnSO_4`
`ZnSO_4 + 4C underset("carbon reduction")overset("during")(rarr) ZnS + 4CO uarr`
At the smelting stage:
`ZnO + C to Zn + CO`
`2ZnO + C `CO_2 + C to 2CO`