Among the choices of alkyl bromide , the least reactive bromide in a `S_(N^(2))` reaction is :

Alkyl bromide is

Arrange the following alkyl chlorides in order of decreasing reactivity in an S_(N^(1) reaction : (I) isopropyl bromide , (II) propyl bromide (III) tert-butyl bromide , (IV) methyl bromide

Arrange the following bromides in the order of reactivity in undergoing S_(N)I reaction

The ratio of relative rates of isopropyl bromide and ethyl bromide in S_N1 reaction is

The most reactive alkyl halide towards S_N2 reaction is______

The correct of reactivity of alkyl halides for S_(N^(1)) reaction is :