Which of the following functional groups contains a nitrogen atom?

• A. $\text{Amine}$
• B. $\text{Ketone}$
• C. $\text{Alcohol}$
• D. $\text{Ether}$

Answer: (A)

Verified step by step guidance

1. Identify the key atoms present in each functional group: Amine, Ketone, Alcohol, and Ether.
2. Recall that an Amine functional group contains a nitrogen atom bonded to carbon and/or hydrogen atoms, typically represented as \(\mathrm{R-NH_2}\), \(\mathrm{R_2NH}\), or \(\mathrm{R_3N}\).
3. Recognize that a Ketone contains a carbonyl group (\(\mathrm{C=O}\)) bonded to two carbon atoms, with no nitrogen present.
4. Understand that an Alcohol contains a hydroxyl group (\(\mathrm{-OH}\)) attached to a carbon atom, and an Ether contains an oxygen atom connected to two carbon atoms (\(\mathrm{R-O-R'}\)), neither of which includes nitrogen.
5. Conclude that among the given options, only the Amine functional group contains a nitrogen atom.