Question

Of the following statements, which are true for $S_{N}2$ reaction?

Answer 1

The statements B, D, E, and H are true for $S_{N}2$ reaction.
The statements A, C, F, and G are false.
(A) Tertiary alkyl halides react slower than secondary.
(B) The absolute configuration of the product is opposite to that of the reactant when an optically active substrate is used. Thus, the reaction proceeds through inversion of configuration.
(C) The reaction shows second order kinetics.
(D) The rate of the reaction depends markedly on the nucleophilicity of the attacking reagent. This is because the nucleophile is the part of the rate determining step.
(E) The mechanism is one step. The bond breaking and the bond forming occurs in the same step.
(F) The reaction does not involve the formation of carbocation intermediate.
(G) The rate law expression is rate [Alkyl halides ] [nucleophile]
(H) The rate of the reaction depends on the nature of the leaving group. Reactions with a better leaving groups proceed at a faster rate than the reactions with a poor leaving group.