Question

The first organic acid produced by microbial fermentation

Answer 1

An organic acid is an organic compound with acidic properties. The most common organic acids are the carboxylic acids, whose acidity is associated with their carboxyl group –COOH. Sulfonic acids, containing the group –SO2OH, are relatively stronger acids. Alcohols, with –OH, can act as acids but they are usually very weak. The relative stability of the conjugate base of the acid determines its acidity. Other groups can also confer acidity, usually weakly: the thiol group –SH, the enolgroup, and the phenol group. In biological systems, organic compounds containing these groups are generally referred to as organic acids.
A few common examples include:

Lactic acid

Acetic acid

Formic acid

Citric acid

Oxalic acid

Uric acid