Describe a simple chemical test that will differentiate the two compounds listed

Question

Describe a simple chemical test that will differentiate the two compounds listed below. Note which compound will react and what will be observed. A simple chemical test is one in which a chemical reagent is added to the compound in a test tube or spot plate. The reaction must be observed within a tew seconds. Physical tests, e.g.. weighing, solubility, boiling point, melting point, do not count Also, direct measurement of the pH with pH meter or acid-base indicator IS NOT acceptable. Both compounds are insoluble in water at pH 7.

Explanation / Answer

if you add HNO2 above mixtrure of compounds only compound A with free amine functionality react HNO2 will leads to give corrosponding hydroxy compound, whereas amide functionality will not react with HNO2, this will be the best test to distingush both compounds

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