Multiple Choice
Which of the following pairs of terms represent two categories of compounds based on their functional groups?
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3. Chemical Reactions
Functional Groups in Chemistry
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Which of the following molecules contains an amino group?
A
C2H5OH (ethanol)
B
CH3COOH (acetic acid)
C
CH3NH2 (methylamine)
D
C6H6 (benzene)
Verified step by step guidance1
Understand what an amino group is: it is a functional group consisting of a nitrogen atom attached to one or more hydrogen atoms, typically represented as \(-\mathrm{NH}_2\).
Examine each molecule's formula and structure to identify the presence of the amino group:
For \(\mathrm{C}_2\mathrm{H}_5\mathrm{OH}\) (ethanol), note that it contains a hydroxyl group \(-\mathrm{OH}\), not an amino group.
For \(\mathrm{CH}_3\mathrm{COOH}\) (acetic acid), recognize the carboxyl group \(-\mathrm{COOH}\), which is different from an amino group.
For \(\mathrm{CH}_3\mathrm{NH}_2\) (methylamine), identify the \(-\mathrm{NH}_2\) group attached to the methyl group, confirming the presence of an amino group.
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