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Multiple Choice
Which of the following compounds contains a thiol functional group?
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B
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D
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1
Identify the functional groups present in each compound by examining their molecular formulas and structures.
Recall that a thiol functional group is characterized by the presence of a sulfur atom bonded to a hydrogen atom, represented as \( -SH \).
Analyze each compound to see if it contains the \( -SH \) group: for example, \( \mathrm{CH_3CH_2SH} \) includes the \( -SH \) group, indicating a thiol.
Compare the other compounds: \( \mathrm{CH_3COOH} \) contains a carboxylic acid group (\( -COOH \)), \( \mathrm{CH_3NH_2} \) contains an amine group (\( -NH_2 \)), and \( \mathrm{CH_3CH_2OH} \) contains an alcohol group (\( -OH \)).
Conclude that the compound with the \( -SH \) group is the one that contains the thiol functional group.