In a `S_(N)2` substitution reaction of the type `R-Br+Cl^(-)
Channel: Doubtnut
Date: 2020-01-19

In a `S_(N)2` substitution reaction of the type `R-Br+Cl^(-) overset(\"DMF\")toR-Cl+Br^(+)` which one of the following has the highest relative rate?