The conversion of primary aromatic amines into diazonium salts is known as ______.

The conversion of primary aromatic amines into diazonium salts is known as diazotisation.Arylamines react with nitrous acid in cold condition to give arenediazonium salts.The arenediazonium salts are stable for a short time and slowly decompose even at low temperature.Hence, they are used immediately after preparation.Ar−NH2+NaNO2+2HCl273−278K−−−−−−−−−→Ar−N+2Cl−+NaCl+2H2O