Chemistry - Halogen Derivative Question with Solution | TestHub

In the $S_{N}2$ mechanism, the reaction is a single-step concerted process where bond breaking and bond formation occur simultaneously.

The rate of the reaction depends on the concentration of both the substrate and the nucleophile (reagent), making it a bimolecular reaction.

The nucleophile attacks from the side opposite to the leaving group, leading to an inversion of configuration (Walden inversion).

The transition state formed during the reaction is a high-energy, highly unstable species that cannot be isolated. Therefore, the statement that the transition state is stable is incorrect.

Answer: The transition state is stable.