객관식
Which of the following compounds contains a thiol functional group?
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2. Molecular Representations
Functional Groups
객관식
Which functional group is characteristic of alcohols and distinguishes them from other classes of organic compounds?
A
Hydroxyl group
B
Carboxyl group
C
Amino group
D
Carbonyl group
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검증된 단계별 안내1
Identify the functional groups listed in the problem: hydroxyl group (−OH), carboxyl group (−COOH), amino group (−NH2), and carbonyl group (C=O).
Recall that alcohols are characterized by the presence of the hydroxyl group, which consists of an oxygen atom bonded to a hydrogen atom (−OH) attached to a saturated carbon atom.
Understand that the carboxyl group (−COOH) is characteristic of carboxylic acids, not alcohols; it contains both a carbonyl and a hydroxyl group bonded to the same carbon.
Recognize that the amino group (−NH2) is characteristic of amines and amino acids, involving nitrogen bonded to hydrogen atoms.
Note that the carbonyl group (C=O) is found in aldehydes and ketones, where a carbon atom is double bonded to oxygen, but it does not include the hydroxyl group that defines alcohols.
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