Write the chemical reaction involved in the extraction of gold by cyanide process. Also give the role of zinc in the extraction.

Explanation

### Step-by-Step Solution:

1. **Understanding the Cyanide Process**:
The cyanide process, also known as the cyanidation process, is a method used to extract gold from its ores. It involves the use of cyanide to form a soluble complex with gold.

2. **Chemical Reaction for Gold Extraction**:
The overall chemical reaction for the extraction of gold using the cyanide process can be represented as follows:
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