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

Explanation

To extract zinc from zinc blende (ZnS), a series of chemical reactions take place. Here’s a step-by-step breakdown of the extraction process:

### Step 1: Roasting of Zinc Blende
The first step involves heating zinc blende (ZnS) in the presence of oxygen. This process is known as roasting, and it converts the zinc sulfide into zinc oxide and sulfur dioxide gas.

**Chemical Reaction:**
\[ 2 \text{ZnS} + 3 \text{O}_2 \rightarrow 2 \text{ZnO} + 2 \text{SO}_2 \]

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