Rate determining step in nitration of benzene is

Step-by-step solution

The nitration of benzene takes places in three steps, i.e. (i) Generation of electrophile ( NO ₂⁺ ) (ii) Attack of an electrophile to benzene ring forming the carbocation (iii) Loss of proton from carbocation giving nitrobenzene. The attack of electrophile to benzene ring giving a carbocation is the slowest and rate determining step.