What is the leaving group in the reaction of CH₃CH₂CH₂Br with KCN to form CH₃CH₂CH₂CN ?
In the SN₂ reaction, Br⁻ is displaced by CN⁻ and acts as the leaving group.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Classification and Nomenclature and Isomerism of Haloalkanes