The rate of dehydrohalogenation of which one among the following is less ?

Step-by-step solution

Dehydrohalogenation reaction order is alkyl halide relative reactivity order is 3^ >2^ >1^ Alkyl halide reactivity order is I > Br > Cl > F (in elimination of F is rarely used). When heated with strong base, alkyl halides typically undergo a 1, 2-elimination reaction to generate alkenes.