Acetic acid exist in dimer state in benzene due to

Options

A. Condensation reaction
B. Hydrogen bonding
C. Presence of carbonyl group
D. Strong polar nature

Answer

### Step-by-Step Solution:

1. **Understanding Acetic Acid Structure**:
- Acetic acid has the molecular formula CH₃COOH. It consists of a methyl group (CH₃) and a carboxylic acid group (COOH).

2. **Dimer Formation**:
- In a dimer, two molecules of acetic acid can associate with each other. This occurs through hydrogen bonding between the hydroxyl (–OH) groups of two acetic acid molecules.

3. **Hydrogen Bonding**:
- The hydrogen atom of one acetic acid molecule can form a hydrogen bond with the oxygen atom of the carboxylic group of another acetic acid molecule. This interaction stabilizes the dimeric form.

4. **Solvent Influence**:
- When acetic acid is dissolved in a non-polar solvent like benzene, the dimerization is favored. The non-polar environment of benzene does not stabilize individual acetic acid molecules, encouraging them to form dimers instead.

5. **Conclusion**:
- Therefore, acetic acid exists in a dimer state in benzene primarily due to the formation of hydrogen bonds between the molecules, which is facilitated by the non-polar nature of the benzene solvent.

### Final Answer:
Acetic acid exists in a dimer state in benzene due to hydrogen bonding between the acetic acid molecules.

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