By treating diazonium salts with cuprous cyanide or KCN and copper powder it forms:
Benzoic acid
Oxalic acid
Aryl nitrile
Citric acid
By treating diazonium salts with cuprous cyanide or KCN and copper powder it forms aryl nitrile.
CuCN/KCN
ArN2+ Cl----------------> ArCN + N2
Identify the following as weak or strong acid : citric acid, tarteric acid, acetic acid, maleic acid, tannic acid, ascorbic acid, oxalic acid, amino acid.