Write $\mathrm{IUPAC}$ name of the given structure.

Write $\mathrm{IUPAC}$ name of the given structure.

Find out the type of isomerism exhibited by the given pair.

${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{NH}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$ and ${\mathrm{CH}}_3-\mathrm{NH}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_3$.

Find out the type of isomerism exhibited by the given pair.

${\mathrm{CH}}_3-\underset{\begin{array}{c}|\\ \mathrm{OH}\end{array}}{\mathrm{CH}}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$ and ${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{O}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

Find out the type of isomerism exhibited by the given pair.

  and 

Find out the type of isomerism exhibited by the given pair.

 and  

Draw resonance structures of phenol.

Draw the resonating structure of buta-1,3-diene.