Explain `SN^(2)` reaction

Explain SN^(1) reaction

Explain S_N^2 reactions. What is the preference order of different alkyl halides to undergo nucleophilic substitution reaction via SN2 mechanism ?

Explain why SN_1 reaction always give racemic mixture?

Which of the following is the example of SN^(2) reaction

SN2 Reaction

Predicrt the order of reactivity of the following compounds in SN^(1) and SN^(2) reactions.

Predicrt the order of reactivity of the following compounds in SN^(1) and SN^(2) reactions.

Which of the following halides will be most reactive in SN^(2) reaction and SN^(2) reaction respectively?

Which of the following halides will be most reactive in SN^(2) reaction and SN^(1) reaction respectively?