In the nitration of benzene with a mixture of conc HNO3 and conc H2SO4, the active species involved are
Nitrite ion
Nitrate ion
Nitronium ion
Nitrogen dioxide
NO+2 is electrophile which is also known as nitronium ion
In the nitration of benzene using a mixture of conc. H2SO4 and conc. HNO3 the Species which initiates the reaction is_______________