$1)$ Classify the following amines as primary, secondary or tertiary:

$A)$
$2)$ Classify the following amines as primary, secondary or tertiary:
$B)$

$3)$ Classify the following amines as primary, secondary or tertiary:
$C)$ $(C_2{H}_5{)}_{2}CHN{H}_2$

$4)$ Classify the following amines as primary, secondary or tertiary:

$D)$ $(C_2{H}_5{)}_{2}NH$

$A)$ Types of amines

Depending upon the number of hydrogen atoms that are replaced by an alkyl or aryl group in ammonia, amines are classified as primary $\left(1^{\circ }\right)$, secondary $\left(2^{\circ }\right)$ and tertiary $\left(3^{\circ }\right)$.

If only one hydrogen atom is replaced then amines of the form $R-N{H}_2$ or primary amines $\left(1^{\circ }\right)$ are obtained.

If two of the three hydrogen atoms are replaced by alkyl/aryl groups then secondary amines $\left(2^{\circ }\right)$ are formed.

If all the three hydrogen atoms are replaced by alkyl/aryl group then $\text{tertiary amines}\left(3^{\circ }\right)$ are obtained.

Classification of the given amines compound


$N$ atom is directly connected with only one $C$ atom $\text{(i.e. one aryl group)},$ so it is a primary amine

$B)$ Types of amines

Depending upon the number of hydrogen atoms that are replaced by an alkyl or aryl group in ammonia, amines are classified as primary $\left(1^{\circ }\right)$, secondary $\left(2^{\circ }\right)$ and tertiary $\left(3^{\circ }\right)$.

If only one hydrogen atom is replaced then amines of the form $R-N{H}_2$ or primary amines $\left(1^{\circ }\right)$ are obtained.

If two of the three hydrogen atoms are replaced by alkyl/aryl groups then secondary amines $\left(2^{\circ }\right)$ are formed.

If all the three hydrogen atoms are replaced by alkyl/aryl group then $\text{tertiary amines}\left(3^{\circ }\right)$ are obtained.

Classification of the given amines compound


In this compound $N$ atom is directly connected with $3$ carbon atoms $\text{(i.e. one aryl and 2 alkyl group)}.$ So, it is a tertiary amine.

$C)$ Types of amines

Depending upon the number of hydrogen atoms that are replaced by an alkyl or aryl group in ammonia, amines are classified as primary $\left(1^{\circ }\right)$, secondary $\left(2^{\circ }\right)$ and tertiary $\left(3^{\circ }\right)$.

If only one hydrogen atom is replaced then amines of the form $R-N{H}_2$ or primary amines $\left(1^{\circ }\right)$ are obtained.

If two of the three hydrogen atoms are replaced by alkyl/aryl groups then secondary amines $\left(2^{\circ }\right)$ are formed.

If all the three hydrogen atoms are replaced by alkyl/aryl group then $\text{tertiary amines}\left(3^{\circ }\right)$ are obtained.

Classification of the given amines compound

$(C_2{H}_5{)}_{2}CHN{H}_2$

$N$ atom is directly connected with only one $C$ atom $\text{(i.e. one alkyl group)}.$ So, it is a primary amine.


$D)$ Types of amines

Depending upon the number of hydrogen atoms that are replaced by an alkyl or aryl group in ammonia, amines are classified as primary $\left(1^{\circ }\right)$, secondary $\left(2^{\circ }\right)$ and tertiary $\left(3^{\circ }\right)$.

If only one hydrogen atom is replaced then amines of the form $R-N{H}_2$ or primary amines $\left(1^{\circ }\right)$ are obtained.

If two of the three hydrogen atoms are replaced by alkyl/aryl groups then secondary amines $\left(2^{\circ }\right)$ are formed.

If all the three hydrogen atoms are replaced by alkyl/aryl group then $\text{tertiary amines}\left(3^{\circ }\right)$ are obtained.

Classification of the given amines compound

$(C_2{H}_5{)}_{2}NH$

In structure, we can clearly see that $N$ is directly connected with $2$ carbon atoms $\text{(i.e. 2 alkyl group)}.$ So, it is a secondary amine.