Reaction of Ethylamine with nitrous acid : Ethyl amine reacts with nitrous acid to form highly unstable diazonium salt which gives nitrogen gas and Ethyl alcohol after decomposition.
`CH_(3)-CH_(2)-NH_(2) overset(NaNO_(2)+HCl) to underset("unstable")(CH_(3)-CH_(2)-N_(2)^(+)Cl^(-)) overset(H_(2)O) to underset("Ethyl alcohol")(CH_(3)-CH_(2)-OH+N_(2)+HCl)`
Reaction of Aniline with nitrous acid : Aniline reacts with nitrous acid at low temeratures `(0-5^(@)C)` to form diazonium salts. (Benzene diazonium salt)
`C_(6)H_(5)NH_(2) underset(0-5^(@)C) overset(NaNO_(2)+HCl) to underset("chloride") underset("Benzene diazonium")(C_(6)H_(5)N_(2)^(+)Cl^(-)+NaCl+H_(2)O)`
