Identify the purification technique for the following mixtures:
$(i)$ Chloroform and aniline
$(ii)$ Impure acetone
$(iii)$ Impure aniline
$(iv)$ Chlorobenzene and bromobenzene

(N/A) $(i)$ Simple distillation: Used for liquids with a large difference in boiling points.
$(ii)$ Simple distillation: Used to separate a volatile liquid from non-volatile impurities.
$(iii)$ Steam distillation: Used for organic compounds that are steam-volatile and insoluble in water.
$(iv)$ Fractional distillation: Used for liquids with a small difference in boiling points.