Question

What type of alkyl halides undergo sn1 and sn2 reaction?

Answer 1

Sn1 (Substitution unimolecular) and Sn2 (Substitution bimolecular) are reactions that occur in different conditions. In case of Halides, if your reactant is primary or tertiary halide, then it is easy for you to conclude that primary halide will undergo Sn2 reaction and tertiary halide will undergo Sn1 reaction.