which of the following alkyl halide undergo rearrangement in `S_(N^(2))` reaction?

Which of the following alkyl halides undergoes the fastest S_(N^(1)) reaction ?

The order of reactivities of the following alkyl halides for a S_(N^(2)) reaction is :

Which of the following is a 2^(@) alkyl halide ?

Which of the following alkyl halides will undergo S_(N)1 reaction most redily ?

Which of the following halide undergoes in hydrolysis via S_(N^(1)) reaction?

Which of the following alkyl halide undergoes a nucleophilic substitution reaction via formation of a carbocation ?