In presence of air , fermentation of ethyl alcohol by azotobactor bacteria forms

Options

A. `CH_(2)=CH_(2)`
B. `C_(2)H_(6)`
C. `CH_(3)CHO`
D. `CH_(3)COOH`

Explanation

To solve the question regarding the fermentation of ethyl alcohol by Azotobacter bacteria in the presence of air, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Compound**:
- Ethyl alcohol is represented by the chemical formula \( \text{C}_2\text{H}_5\text{OH} \) or \( \text{CH}_3\text{CH}_2\text{OH} \).

2. **Understand the Process**:
- Fermentation is a metabolic process that converts sugar to acids, gases, or alcohol using microorganisms like bacteria or yeast. In this case, we are focusing on the fermentation of ethyl alcohol by Azotobacter bacteria.

3. **Recognize the Role of Air**:
- The presence of air indicates that oxygen is available. This means that the fermentation process will lead to oxidation rather than just anaerobic fermentation, which typically produces alcohol.

4. **Determine the Product of Oxidation**:
- When ethyl alcohol is oxidized in the presence of air, it is converted into acetic acid. Since ethyl alcohol has two carbon atoms, the resulting acid will also have two carbon atoms, which is acetic acid (\( \text{CH}_3\text{COOH} \)).

5. **Conclude the Reaction**:
- Therefore, the fermentation of ethyl alcohol by Azotobacter bacteria in the presence of air results in the formation of acetic acid.

### Final Answer:
In the presence of air, fermentation of ethyl alcohol by Azotobacter bacteria forms acetic acid (\( \text{CH}_3\text{COOH} \)).

---