(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`

(i)Write equation for preparation of 1-iodobutane from 1- chlorobutane

1.	(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`
Answer» `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`

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(i) Arrange the following compounds in an increasing order of basic strength : `C_(6)H_(5)NH_(2), C_(6)H_(5)N(CN_(3))_(2), (C_(2)H_(5))_(2)NH and CH_(3)NH_(2)` (ii) Arrange the following compounds in a decreasing order of `pK_(b)` values: `C_(2)H_(5)NH_(2), C_(6)H_(5)NHCH_(3), (C_(2)H_(5))_(2) NH and C_(6)H_(5)NH_(2)`
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(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`

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