Q. Among the following, the reaction that proceeds through an electrophilic substitution is :
A) $C_6H_5N_2^+Cl^- \xrightarrow{Cu_2Cl_2} C_6H_5Cl + N_2$
B) $C_6H_6 + Cl_2 \xrightarrow{AlCl_3} C_6H_5Cl + HCl$
C) $C_6H_6 + Cl_2 \xrightarrow{UV\ light} C_6H_6Cl_6$
D) $C_6H_5CH_2OH + HCl \xrightarrow{heat} C_6H_5CH_2Cl + H_2O$
Explanation
[Solution] Chlorination of benzene with $Cl_2/AlCl_3$ proceeds via the electrophile $Cl^+$. (1) is Sandmeyer, (3) radical addition, (4) nucleophilic substitution. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.