Haloalkanes And Haloarenes

$\mathrm{S}_{\mathrm{N}} 1$ reaction of Alkyl halides is favoured by the presence of bulky substituents, protic solvents and the reaction products are a racemic mixture

Vinyl halides do not undergo nucleophilic substitution reaction easily c.

The product formed when (-)-2-Methylbutan-1-OI is heated with Conc. HCl is (+)-1-Chloro-2-methylbutane with Retention of configuration

$\mathrm{S}_{\mathrm{N}} 2$ reaction of optically active halides are accompanied by Retention of configuration