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Write chemical reactions taking place in the extraction of zinc from zinc blende.

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The following reactions take place during the extraction of zinc from zinc blende.
Roasting `2ZnS +3O_(2) to 2ZnO +2SO_(2)uarr`
Reduction `ZnO +C("coke") to Zn +Couarr`
Both these reactions are taking place at very high temperature conditions.
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