Give the structures of the following:
$(a)$ $n$-propyl $(b)$ Isopropyl $(c)$ Isobutyl $(d)$ Isopentyl
What is common in all $Iso$ groups?

Match the structures given in Column $I$ with their $IUPAC$ names in Column $II$.

Column $I$ (Structure)	Column $II$ ($IUPAC$ Name)
$(A)$ $CH_3-CH=CH-CH_2Br$	$(p)$ $1$-Bromobut-$2$-ene
$(B)$ $CH_2=C(CH_3)-CH_2Br$	$(q)$ $3$-Bromo-$2$-methylpropene
$(C)$ $CH_3-C(CH_3)=CH-CH_2Br$	$(r)$ $4$-Bromopent-$2$-ene
$(D)$ $CH_3-CH=CH-CH_2CH_2Br$	$(s)$ $1$-Bromo-$2$-methylbut-$2$-ene

What is the structure of $3-$Methyl$-2-$cyclohexenol?

The $IUPAC$ name of $CH_3-CH=C(OCH_3)-CH_3$ is

Derive the structure of $(i)$ $2-$Chlorohexane,$(ii)$ Pent$-4-$en$-2-$ol,$(iii)$ $3-$Nitrocyclohexene,$(iv)$ Cyclohex$-2-$en$-1-$ol,$(v)$ $6-$Hydroxyheptanal.

Write $IUPAC$ names of the following compounds:
$(i)$ $(CH_3)_2CH-CH=CH-CH_2-CH=C(CH_3)-CH(C_2H_5)-CH_3$
$(ii)$ The structure is shown below:
$(iii)$ $CH_2=C(CH_2CH_2CH_3)_2$
$(iv)$ $CH_3-CH(CH_3)-CH=C(C_2H_5)-CH_2-CH(CH_3)-CH_2CH_2CH_3$