Question

The `IUPAC` name of the organic acid present in sour milk is
A. (1) `2`-hydroxybutanedioic acid
B. (2) `2,3`-dihydroxybutanedioic acid
C. (3) `2`-hydroxypropanoic acid
D. (4) `3`-hydroxypropane-`1,2,3`-tricarboxylic acid

Answer 1

Correct Answer - C
The compound is lactic acid: `CH_(3)CH(OH)COOH`. Compound (1) is called malic acid (apples, watermelons, graps juice, wine), compound (2) is called tartaric acid (graps juice, wine), and compound (4) is citric acid (citrus fruits).