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What indicates a positive Azo Dye Test for primary aromatic amines?

Expert Answer

Formation of a brilliant Orange or Red dye. Process: Amine $\xrightarrow{HNO_2}$ Diazonium Salt $\xrightarrow{\beta-\text{naphthol}}$ Azo Dye ( $Ar-N=N-Ar'$ ).

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