Extraction of zinc from zinc blende is achieved by :

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Solution

Extraction of zinc from zinc blende is achieved by roasting of $Z n S$ to $Z n O$ followed by reducing of $Z n O$ using coke above $1000^{o} C$ .
Roasting:
$2 Z n S + 3 O_{2} \to 2 Z n O + 2 S O_{2}$

Reduction with carbon :

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