Q.
The reaction,
Benzene + methyl halide $\xrightarrow{Anhy.AlCl_3}$ Toluene,
is known as
Solution:
Benzene reacts with methyl iodide in the presence of anhydrous $AlCl_3$ to form toluene. Reaction is called as Friedel-Crafts reaction. It is used for alkylation and acylation of benzene nucleus.
