Glutamine​H2​N−C∥O−CH2​−CH2​−C∣NH2​H−COOH​has amide functional group inside chain. So it gives Hoffmann bromamide reaction.LysineH2​N−(CH2​)4​−C∣NH2​H−COOH has 1 amine group. So it gives +ve Hinsberg test.Tyrosine
has phenolic OH. So it gives +ve test with neutralFeCl3​.SerineHO−CH2​−C∣NH2​​H−COOHhas alcohlic -OH group.So it gives +ve test with cerric ammonium nitrate.
