What is coal tar? What are its uses?

Explanation

### Step-by-Step Solution:

**Step 1: Definition of Coal Tar**
- Coal tar is a thick, black liquid that is a byproduct of the destructive distillation of coal. This process involves heating coal in the absence of air at high temperatures (around 1000 degrees Celsius), which breaks down the coal into various components.

**Step 2: Formation of Coal Tar**
- During the destructive distillation of coal, several products are formed, including coal gas, coke, and coal tar. Coal tar is one of the valuable products obtained from this process.

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