(i)Write equation for preparation of 1-iodobutane from 1- chlorobutane
(ii) Out of 2 - bromopentane 2- bromo-2 methylbutane and 1- bromopentane ,which compound is most reactive towards elimination and why ?
( iii) Give IUPAC name of
`CH_3-CH=CH-underset(Br)underset(|)overset(CH_3)overset(|)C-CH_3`

Explanation

`CH_3CH_2CH_2CH_2-Clunderset("acetone")overset("Nal")rarrCH_3CH_2CH_2CH_2-I`
(b) 2-bromopentane is most reactive towards `Beta`- elemention raction with product of pent -1-ene ,pent 2-ene.
( c) 4-bromo -4-Methylpent -2-ene`