Zadania z chemii IB HL

Benzene undergoes nitration when it is warmed with a mixture of concentrated nitric and sulfuric acids. Which species attacks the benzene ring in this substitution reaction? A. $\ce{HNO3}$ B. $\ce{NO2}$• C. $\ce{NO2-}$ D. $\ce{NO2+}$

Which species can act as the electrophile in a substitution reaction with benzene? A. $\ce{Br-}$ B. $\ce{Na+}$ C. $\ce{OH-}$ D. $\ce{Br+}$

Benzene reacts with the electrophile $\ce{Br+}$, generated from bromine and iron(III) bromide, by electrophilic substitution. Which structure correctly represents the intermediate formed when $\ce{Br+}$ bonds to the ring? A. structure A B. structure B C.…