Question

Which of the following is the correct order of the steps involved in the production of the vinegar?

I. Acetic acid separation by rarefaction.
II. Pasteurization followed by mixing SO₂.
III. Fermentation of carbohydrates (sugar) by yeast.
IV. Microbial degrdation of ethanol.
V. Bleaching by potassium ferrocyanide.

• A. II $\to$ IV $\to$ I $\to$ V $\to$ III
• B. III $\to$ IV $\to$ I $\to$ V $\to$ II
• C. III $\to$ IV $\to$ II $\to$ V $\to$ I
• D. III $\to$ IV $\to$ I $\to$ II $\to$ V

Answer 1

The correct option is B III $\to$ IV $\to$ I $\to$ V $\to$ II

Step 1: Fermentation of carbohydrates (sugar) by yeast which results in the production of ethanol.
Step 2: Microbial degradation of ethanol with the help of bacteria like Acetobacter and Gluconobacter. As a result, a mixture of acetic acid and other by-products are obtained.
Step 3: Separation of acetic acid from this mixture by the process of rarefaction.
Step 4: Bleaching of acetic acid with the help of potassium ferrocyanide.
Step 5: After bleaching, it is taken for pasteurization. Then SO₂ is mixed in a small quantity to produce vinegar.