Explain the structure of trimethylamine.

Classify the following amine as primary, secondary or tertiary:

 ${\left({\mathrm{C}}_2{\mathrm{H}}_5\right)}_2{\mathrm{CHNH}}_2$

Classify the following amines as primary, secondary and tertiary and write the IUPAC names. 

n — butylamine

Give the structures of A, B and C in the following reactions: ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{I}\stackrel{\mathrm{NaCN}}{\to }\mathrm{A}\underset{\mathrm{Partial} \mathrm{hydrolysis}}{\overset{{\mathrm{OH}}^{-}}{\to }}\mathrm{B}\stackrel{\mathrm{NaOH}+{\mathrm{Br}}_2}{\to }\mathrm{C}$.

How will you convert Nitromethane into dimethylamine?