How many benzene derivatives are possible for the molecular formula $C_7H_7Cl$?

Which of the following is a tertiary alkyl halide?

Tincture of iodine is the common name for

Write structures of the following compounds:
$(i)$ $2-$Chloro$-3-$methylpentane
$(ii)$ $1-$Chloro$-4-$ethylcyclohexane
$(iii)$ $4-$tert-Butyl$-3-$iodoheptane
$(iv)$ $1,4-$Dibromobut$-2-$ene
$(v)$ $1-$Bromo$-4-$sec-butyl$-2-$methylbenzene.

The homologue of $CH_3-Cl$ is:

What are vicinal dihalides? Give examples.