Benzene can be prepared by

Nitro Benzene can be prepared from Benzene by using mixture of conc. HNO_(3) and conc. H_(2)SO_(4) in the mixture, H_(2)SO_(4) act as a

Ethyl benzene can be prepared from

Chlorobenzene can be prepared from Benzene diazonium chloride by

Fluorobenzene can be prepared from benzene diazonium chloride by heating with:

Nitrobenzene can be prepared from benzene by using a mixture of conc. HNO_3 and conc. In the nitrating mixture, HNO_3 acts as a/an

Ethyl benzene can not be prepared by :