Question

Is $ N{H_2} $ an amine?

Answer 1

Hint: One must know the functional group amine, how they are represented and which element they contain. Amines have $ nitrogen $ as a central metal atom and other organic substituents are attached to it. They are derived from $ ammonia $

Complete answer:
For the functional group amine, it should have a basic $ nitrogen $ atom with a lone pair. Amines are organic derivatives of $ ammonia $ $ N{H_3} $ , in which one or more of the three $ hydrogen $ is replaced by a $ carbon $ atom. Amines are classified as primary or $ {1^ \circ } $ , secondary or $ {2^ \circ } $ and tertiary or $ {3^ \circ } $ amines depending upon how many $ carbon $ groups are attached to the $ nitrogen $ atom. Let us understand these classification one by one-
Primary ( $ {1^ \circ } $ ) amines- When in $ ammonia $ group, one of the three $ hydrogen $ atoms is replaced by an alkyl group or an aromatic group. It is known as primary amine. $ \;methylamine $ is an example of primary amine.
Secondary ( $ {2^ \circ } $ ) amines- In secondary amines two alkyl, aryl or both of these two organic substituents replace the $ hydrogen $ atom of $ ammonia $ molecule forming an amine. $ dimethylamine $ is an example of secondary amine.
Tertiary ( $ {3^ \circ } $ ) amines- When all of the three $ hydrogen $ are replaced by organic substituents like an aryl, or aromatic group in the $ ammonia $ molecule is known ad tertiary amines. $ trimethylamine $ is a tertiary amine.
Apart from these three categories there is another type of amine called cyclic amine. It is either a secondary or tertiary amine present in an aromatic ring.
Let us look at the amine given to us. It is $ N{H_2} $ and as we have learned earlier amine is represented as $ N{H_2} $ so it is an amino group.

Note:
Amine and amide are two different functional groups. In an amide it has a carbonyl group attached to a $ nitrogen $ group, whereas in amine the compounds which contain $ nitrogen $ atoms are bonded in a hydrocarbon framework.