What is the composition of water gas and how is it formed ?

Explanation

### Step-by-Step Solution:

**Step 1: Understand the Composition of Water Gas**
Water gas is primarily composed of two gases: carbon monoxide (CO) and hydrogen gas (H2). The typical composition is about 50% carbon monoxide and 50% hydrogen.

**Step 2: Identify the Formation Process of Water Gas**
Water gas is formed through a specific chemical reaction. The process involves passing steam over a substance known as coke, which is a form of carbon.

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