In the electrophilic aromatic substitution reaction of $\mathrm{benzene}$, which of the following is the most common electrophile?

What products would you expect from the following coupling reactions?

(d)

(e)

Which statement is incorrect regarding the reaction of $\mathrm{benzene}$ with an $\mathrm{electrophile}$?

Which set of reagents is required to synthesize nitrobenzene from benzene?

In the structure of $\mathrm{benzene}$, what does the ring in the center of the hexagon represent?

Which type of substituent on a benzene ring increases the rate of electrophilic aromatic substitution (EAS) reactions by activating the ring toward electrophiles?

Which of the following products can be synthesized starting with $C_6{H}_6$ and using any other reagents?

Which of the following is a correct method to prepare ${\mathrm{Ph}}_{\mathrm{NO}}2$ (nitrobenzene) from benzene?