Arrange the following in the increasing order of C-C bond length : `C_2H_6, C_2H_4, C_2H_2, C_6H_6`

Explanation

To arrange the compounds \(C_2H_6\) (ethane), \(C_2H_4\) (ethene), \(C_2H_2\) (ethyne), and \(C_6H_6\) (benzene) in increasing order of C-C bond length, we need to consider the type of bonds present in each compound.

### Step-by-Step Solution:

1. **Identify the Types of Bonds**:
- **C-C bond in \(C_2H_6\)**: Ethane has a single bond (C-C).
- **C-C bond in \(C_2H_4\)**: Ethene has a double bond (C=C).
- **C-C bond in \(C_2H_2\)**: Ethyne has a triple bond (C≡C).
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