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Multiple Choice
Which of these is a thiol?
A
—SH
B
—COH
C
—OH
D
None of the listed responses is correct.
Verified step by step guidance
1
Understand the functional group known as a thiol. A thiol is characterized by the presence of a sulfhydryl group, which is denoted as \( \text{R-SH} \), where \( \text{R} \) represents an alkyl or other organic group.
Examine the given options to identify the presence of a sulfhydryl group. The options provided are: \( \text{—SH} \), \( \text{—COH} \), and \( \text{—OH} \).
Recognize that the \( \text{—SH} \) group is indeed a sulfhydryl group, which is the defining feature of a thiol.
Note that the \( \text{—COH} \) group represents an aldehyde functional group, and the \( \text{—OH} \) group represents a hydroxyl group, neither of which are thiols.
Conclude that the statement 'None of the listed responses is correct' is incorrect, as \( \text{—SH} \) is a thiol.