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Multiple Choice
The highlighted part of this molecule is derived from which functional group?
A
B
C
D
Verified step by step guidance
1
Identify the highlighted part of the molecule and examine the atoms and bonds involved in that region.
Recall the defining characteristics of each functional group: a ketone has a carbonyl group (C=O) bonded to two carbon atoms; an aldehyde has a carbonyl group bonded to at least one hydrogen; a carboxylic acid has a carbonyl group bonded to a hydroxyl group (-OH); and an alcohol has a hydroxyl group (-OH) attached to a saturated carbon.
Look specifically for the carbonyl group (C=O) in the highlighted part, and determine what atoms are attached to the carbonyl carbon.
If the carbonyl carbon is bonded to two carbon atoms, then the functional group is a ketone; if bonded to one carbon and one hydrogen, it is an aldehyde; if bonded to a hydroxyl group, it is a carboxylic acid.
Based on this analysis, match the highlighted part to the correct functional group by comparing its structure to these definitions.