Arrange the compounds of each set in order of reactivity towards SN2 displacement i. 2-Bromo-2-methylbutane,1-Bromopèntane, 2-Bromopentane ii. 1-Bromo-3-methylbutane, 2- Bromo-2methylbutane, 3 -Bromo-2-methylbutane iii. 1-Bromobutane, 1-Bromo-2,2-dimethylpropane, 1 -Bromo-2-methylbutane, 1-Bromo-3-methylbutane.

Explanation

i.2-Bromo:2mețhylbutane .<2^*. - Bromopentane .<. -Bromopentane
ii. .2-. Bromo .-2. methylbutane .<3:. Bromo-2 méthytbutane .<1. - Bromo-3-methylbutane
ii. .1-B. roomo- .2,2-. dimethylpropane .<. - - Bromo .-2. methylbutane .<1:. Bromo- 3 -methylbutane.