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2021 O Level Chem P1 Q38 — Organic Chemistry / Functional Groups Solution

Organic Chemistry / Functional Groups 2021 O Level Pure Chemistry · Paper 1 · Q38

Question

Statins are compounds used in some medicines. An example of a statin is shown. Which part of the structure shows the functional group found in carboxylic acids? Question diagram

Question diagram

A
B
C
D

Correct answer: A

Video Solution

Explanation

Answer: A. The functional group found in carboxylic acids is the carboxyl group, –COOH (written –C(=O)–OH). In the statin structure, the part labelled A is the –COOH group, so A is the correct answer.

The other labels point to different functional groups: the –OH (hydroxyl) of an alcohol, and an ester linkage (–C(=O)–O–C), as well as a plain ring carbon with no functional group. Only the carboxyl group, –COOH, is characteristic of carboxylic acids.

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