How is coke formed ? Give two uses of coke.

Explanation

### Step-by-Step Solution:

**Step 1: Understanding Coke Formation**
Coke is formed through a process called destructive distillation of coal. This process involves heating coal in the absence of air, which causes it to decompose chemically. As a result, volatile substances are released, leaving behind a solid carbon-rich material known as coke.

**Step 2: Destructive Distillation Process**
1. **Heating Coal**: Coal is placed in a closed container and heated to high temperatures (around 1000°C).
2. **Absence of Air**: The container is sealed to prevent air from entering, which avoids combustion.
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