Discussion
Match the following:
| Fatty Acids (Common name) | Systematic name |
|---|---|
| a. Acetic acid | 1. n-Butanoic acid |
| b. Butyric acid | 2. n-Hexadecanoic acid |
| c. Palmitic acid | 3. n-Tetra cosanoic acid |
| d. Lignoceric acid | 4. Ethanoic acid |
Choose the most appropriate option from below :
Answer: C
The correct matching is a-4, b-1, c-2, d-3.
The systematic name counts the carbon atoms in the chain:
- Acetic acid, 2 carbons: ethanoic acid.
- Butyric acid, 4 carbons: n-butanoic acid.
- Palmitic acid, 16 carbons: n-hexadecanoic acid.
- Lignoceric acid, 24 carbons: n-tetracosanoic acid.
Option D swaps palmitic and lignoceric acids, giving the 16-carbon acid a 24-carbon name. The first two codes start by pairing acetic acid with the wrong chain length, and acetic acid is the easiest anchor to fix: it is the acid of vinegar, with two carbons.
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