Phenol when nitrated with conc. `HNO_(3)` in presence of conc. `H_(2)SO_(4)` forms

When phenol is treated with conc. HNO_(3) in the presence of conc. H_(2)SO_(4) , the product is :

Pheol reacts with conc. HNO_(3) in the presence of conc. H_(2)SO_(4) to give :

Benzene on reaction with conc. HNO_(3) in presence of conc. H_(2)SO_(4) followed by the treatment of CI_(2) in presence of FeCI_(3) followed by the treatment of CI_(2) in presence of FeCI_(3) , it gives :

Nitration of benzene is carried out with conc. HNO_(3) in presence of conc. H_(2)SO_(4) . The role of conc. H_(2)SO_(4) is to provide

What happens when nitrobenzene reacts with conc. HNO_3 in the presence of conc. H_2 SO_4 ?

What happens when toluene is treated with conc. HNO_(3) and conc. H_(2)SO_(4) at 293K ?