List-1List-2P.Anline1.Sulpha drugQ.TNT2.Solvent in Friedel CraftR.Sulphanilamide3.ExplosiveS.Nitrobenzene4.Used in Azo dyes
P 4 Q 3 R 1 S 2
Aniline is used in azo-coupling reactions. Some of the products are popular dyes. TNT or trinitrotoluene is an explosive. Nitrobenzene is used as a solvent for Friedel-Crafts reactions. Sulphanilamide is a sulfa/sulpha drug.