The compound in which the distance between the two adjacent carbon atoms is largest is : Benzene Ethyne Ethene Ethane

Options

A. Benzene
B. Ethyne
C. Ethene
D. Ethane

Answer

To determine which compound has the largest distance between two adjacent carbon atoms, we need to analyze the types of carbon-carbon bonds present in each compound. The bond lengths vary depending on the hybridization of the carbon atoms involved in the bond.

### Step-by-Step Solution:

1. **Identify the Hybridization of Carbon Atoms in Each Compound:**
- **Benzene (C6H6):** The carbon atoms in benzene are sp² hybridized.
- **Ethyne (C2H2):** The carbon atoms in ethyne are sp hybridized.
- **Ethene (C2H4):** The carbon atoms in ethene are sp² hybridized.
- **Ethane (C2H6):** The carbon atoms in ethane are sp³ hybridized.

2. **Understand the Relationship Between Hybridization and Bond Length:**
- The bond length increases in the order of hybridization: sp (shortest) < sp² < sp³ (longest).
- This means that sp³ hybridized carbon atoms will have the longest carbon-carbon bond length compared to sp and sp² hybridized carbon atoms.

3. **Compare the Bond Lengths:**
- **Benzene:** C-C bond length (sp²) is shorter than that of ethane.
- **Ethyne:** C-C bond length (sp) is the shortest.
- **Ethene:** C-C bond length (sp²) is shorter than that of ethane.
- **Ethane:** C-C bond length (sp³) is the longest.

4. **Conclusion:**
- Based on the hybridization and the corresponding bond lengths, ethane (C2H6) has the largest distance between two adjacent carbon atoms.

### Final Answer:
The compound in which the distance between the two adjacent carbon atoms is largest is **Ethane**.

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