How can the following conversions to be carried out?

How can the following conversions be carried out?
(i) 2-bromopropane to 1-bromopropane (ii) But-l-ene to n-butyl iodide
(iii) 2-chloropropane to 1-propanol (iv) iso-propyl alcohol to iodoform
(v) Chlorobenzene to p-nitrophenol