Allotrope of carbon which posses high melting point?

Options

A. Graphite
B. Fullerene
C. Coke
D. Diamond

Explanation

To determine the allotrope of carbon that possesses the highest melting point, we will analyze the different allotropes of carbon and their respective melting points.

### Step-by-Step Solution:

1. **Identify the Allotropes of Carbon**:
- The main allotropes of carbon include graphite, diamond, fullerene (C60), and coke.

2. **Analyze Graphite**:
- Graphite is composed of layers of carbon atoms arranged in a hexagonal lattice.
- The melting point of graphite is approximately 3600 °C.
- It has covalent bonding within the layers and van der Waals forces between the layers, making it relatively easy to break.

3. **Analyze Fullerene (C60)**:
- Fullerene has a spherical structure and is often referred to as "buckyballs."
- The melting point of C60 is about 280 °C.
- It has a unique molecular structure but does not have a high melting point compared to other allotropes.

4. **Analyze Coke**:
- Coke is a carbon-rich material derived from coal and is primarily used in metallurgical processes.
- The melting point of coke is around 28 °C, which is significantly lower than that of graphite and diamond.

5. **Analyze Diamond**:
- Diamond has a tetrahedral structure where each carbon atom is bonded to four other carbon atoms through strong covalent bonds.
- The melting point of diamond is approximately 4000 °C (or 7200 °F), making it the highest among all carbon allotropes.
- Diamond is also known as the hardest natural substance.

6. **Conclusion**:
- Among the allotropes of carbon analyzed, diamond has the highest melting point at about 4000 °C.

### Final Answer:
The allotrope of carbon which possesses the highest melting point is **diamond**.

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