Haloforms are trihalogen derivatives of

Write the isomers of the compound having formula $C_4H_9Br$.

Which of the following is a gem-dihalide?

The general formula for alkyl halides is

Give the $IUPAC$ names of the following compounds:
$(i)$ $CH_3-CH(Cl)-CH(Br)-CH_3$
$(ii)$ $CHF_2-CBrClF$
$(iii)$ $Cl-CH_2-C\equiv C-CH_2-Br$
$(iv)$ $(CCl_3)_3-C-Cl$
$(v)$ $CH_3-C(p-ClC_6H_4)_2-CH(Br)-CH_3$
$(vi)$ $(CH_3)_3-C-CH=CCl-C_6H_4I-p$

Which among the following is a haloarene?