Vinegar is prepared from alcohol with the help of

Options

A. Lactobacillus
B. Acetobacter
C. Azotobacter
D. Rhizobium

Answer

**Step-by-Step Solution:**

1. **Understanding Vinegar**: Vinegar is a common kitchen ingredient that is primarily an aqueous solution of acetic acid. It may also contain trace chemicals for flavor enhancement.

2. **Source of Vinegar**: Vinegar is produced from alcohol, specifically ethanol, which is a type of alcohol.

3. **Role of Bacteria**: The conversion of ethanol into acetic acid (which constitutes vinegar) is facilitated by specific bacteria.

4. **Identifying the Correct Bacteria**: Among the options provided:
- **Lactobacillus**: This bacterium is involved in the fermentation of milk into curd, not in vinegar production.
- **Acetobacter**: This is the bacterium that converts ethanol into acetic acid, thus producing vinegar.
- **Azotobacter**: This bacterium is known for nitrogen fixation in the soil and does not play a role in vinegar production.
- **Rhizobium**: Similar to Azotobacter, this bacterium is also involved in nitrogen fixation in leguminous plants and is not related to vinegar production.

5. **Conclusion**: The correct answer to the question is **Acetobacter**, as it is the bacterium responsible for converting alcohol (ethanol) into vinegar (acetic acid).

**Final Answer**: Acetobacter

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