Question

Acetic acid Is manufactured by the fermentation of
A. Ethanol
B. Methanol
C. Ethanal
D. Methanal

Answer 1

Hint: Acetic acid is an important organic chemical product.
From ancient times, acetic acid fermentation happens through partial oxidation of ethanol.

Complete Step by Step Solution:
Ethanol also known as ethyl alcohol is an organic chemical compound.
It is simple alcohol having the chemical formula\[{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{OH/}}{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{OH}}\].
It contains an ethyl group associated with a hydroxyl group.
Ethanol is a volatile, explosive, uncoloured liquid with a distinct odour resembling wine and a pungent flavour.
It is an effective component of alcoholic beverages.
Acetic acid, also known as ethanoic acid, is an acidic, uncoloured liquid.
It is an organic compound with the chemical formula\[{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{COOH}}\].
Acetic acid is the major unit of vinegar other than water and small components.
Ethanol fermentation or alcoholic fermentation is a natural process which transforms sugars such as glucose, fructose, and sucrose into cellular energy, generating ethanol and carbon dioxide as by-products.
Acetic acid is also produced as a side-product in this reaction by the oxidation of ethanol.
Ethanol under aerobic conditions gets oxidised by Acetic acid bacteria (AAB) to yield acetic acid in neutral and acidic mediums.
AAB uses ethanol as a substrate and helps in the oxidation process.
Acetobacter, which is a type of AAB, is responsible for the fermentation of ethanol.
The reaction occurs as follows:
\[{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{OH+}}{{\rm{O}}_{\rm{2}}} \to {\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{COOH + }}{{\rm{H}}_{\rm{2}}}{\rm{O}}\]
So, option A is correct.

Additional Information: With the supply of adequate oxygen, acetobacter bacteria can generate acetic acid from a combination of alcoholic foods.
For examples, apple cider, wine, fermented grain, malt, rice, potato mashes etc.,

Note: In this reaction, a dilute alcohol solution is filled with Acetobacter and maintained in a warm, airy location. This solution then converts into acetic acid over a few months. Industry-level production techniques quicken this method by enhancing the supply of oxygen to the bacteria.