Rank the alkyl halides in order of increasing reactivity in `E_(2)` reaction .

Write the mechanism of S_N1 reaction. Arrange the following alkyl halides in the decreasing order of their reactivity towards S_N1 reaction: 1^@ alkyl halide, 3^@ alkyl halide, 2^@ alkyl halide, methyl halide.

Give the order of reactivity for S_N1 reaction in alkyl halides.

The correct increasing order of the reactivity of halides for S_(N^(1)) reaction is:

The correct increasing order of the reactivity of halides for S_(N) 1 reaction is :

The correct increasing order of the reactivity of halides for S_(N^(1)) reaction is: