Which is an almost pure form of carbon

Options

A. Coke
B. Coal tar
C. Coal gas
D. None of these

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for an almost pure form of carbon among the given options: coke, coal tar, and coal gas.

2. **Identifying the Options**:
- **Coke**: A solid fuel derived from coal that is produced by heating coal in the absence of air.
- **Coal Tar**: A viscous liquid obtained during the carbonization of coal, containing various organic compounds.
- **Coal Gas**: A mixture of gases produced during the carbonization of coal, including carbon monoxide, methane, and other hydrocarbons.

3. **Analyzing the Composition**:
- **Coke**: Contains about 98% carbon, making it a very pure form of carbon.
- **Coal Tar**: Contains approximately 50% carbon, which is significantly less pure than coke.
- **Coal Gas**: Is a mixture of various gases and does not have a high concentration of carbon.

4. **Conclusion**: Among the options provided, coke has the highest percentage of carbon (98%), making it the almost pure form of carbon.

5. **Final Answer**: The correct answer is **Coke**.

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