How can you prepare nitro benzene from benzene.

Benzene when treated with a mixture of concentrated HNO₃ and H₂SO₄ below 60°C gives nitro benzene.

(or)
${\mathrm{C}}_6{\mathrm{H}}_6+{\mathrm{HNO}}_3\stackrel{{\mathrm{H}}_2{\mathrm{SO}}_4}{\to }{\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NO}}_2+{\mathrm{H}}_2\mathrm{O}$