Which allotropic form of carbon has a two dimensional sheet like structure?

Options

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

Explanation

**Step-by-Step Solution:**

1. **Understanding Allotropes of Carbon:**
- Carbon exists in several allotropic forms, which are different structural forms of the same element. The most common allotropes include diamond, graphite, and fullerene.

2. **Identifying the Structure of Graphite:**
- Among these allotropes, graphite is known for its unique structure. It has a two-dimensional sheet-like arrangement of carbon atoms.

3. **Describing the Arrangement of Carbon Atoms in Graphite:**
- In graphite, carbon atoms are arranged in a hexagonal pattern. Each carbon atom is bonded to three other carbon atoms, forming a flat, planar sheet.

4. **Layers of Graphite:**
- These sheets of carbon atoms are stacked on top of each other. The layers are held together by weak Van der Waals forces, which allow them to slide over one another easily, making graphite slippery.

5. **Conclusion:**
- Therefore, the allotropic form of carbon that has a two-dimensional sheet-like structure is **graphite**.

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