Identify the alkyl halide that reacts the fastest in an sn2 reaction.

1-iodopropane The rate of SN2 reactions mainly depends on 1. Steric hindrance of substrate2. Ability of leaving group capacity. Weaker the Carbon-halogen bond most readily reactsThe reactivity order of alkyl halides in SN2 reaction is R - I > R - Br > R - Cl > R - FMost reactive is 1-iodopropaneLeast reactive is 1-fluoropropane