Question

Vinegar is [CPMT $1997$]
A.$HCHO$
B.$HCOOH$
C.$C{{H}_{3}}CHO$
D.$C{{H}_{3}}COOH$

Answer 1

Hint: Vinegar is one kind of liquid that is produced by the double fermentation process. It is used not only in cooking but also in various food dishes to add extra flavor. The word vinegar is taken from the French word ‘vin aigre’ which means sour wine. In the process of fermentation, ‘acetobacter’ bacteria are involved.

Complete answer:Vinegar is an acidic liquid prepared through the fermentation of ethanol and acetic acid. Vinegar can be made from a variety of source materials and each of them contributes its unique flavor to the final product. These different source materials are grapes, wines, sugar cane, rice, fruit wines, etc The strong variety of vinegar is found in spirit vinegar containing $5%-21%$acetic acid.

In the first step of the fermentation process, yeast feeds on the sugar or stretches any liquid from plant food such as fruits, grasps, rice, etc. Then the liquid ferments into alcohol and then the alcohol is exposed to air. The acetic acid bacteria named acetobacter ferments the alcohol again over weeks or over months, to form the final product, vinegar.

$\begin{align}
  & {{C}_{2}}{{H}_{5}}OH\,\,\,+\,\,\,{{O}_{2}}\xrightarrow{Acetobactor}C{{H}_{3}}COOH\,\,\,\,+\,\,\,{{H}_{2}}O \\
 & (Ethanol)\,\,\,\,\,(Air)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(Acetic\,\,acid) \\
\end{align}$

Thus any normal vinegar contains $5%-8%$acetic acid, $C{{H}_{3}}COOH$.

Thus, option (D) is correct.

Note: Most of the vinegar contains low calories and nutrients. This is because most of the vinegar is free from sugar and sodium. But not all vinegar is calorie-free, there is some vinegar made from a blend of grape juice and wine. Sometimes sugars are added. It is necessary to check the label to know the ingredients list and nutrition facts before using.