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Give one chemical test to distinguish between the following pairs of compounds : Aniline and benzylamine |
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Answer» Solution :Aniline `(C_(6)H_(5)NH_(2))` and benzylamine `(C_(6)H_(5)CH_(2)NH_(2))`. Action of nitrous acid `(HNO_(2))`: BENZYL amine gives a brisk effervescenc of `N_(2)` gas with the FORMATION of alcohol. `underset("Benzyl alcohol")(C_(6)H_(5)CH_(2)NH)+HONO underset(273-278K)overset(NaNO_(2)//HCl)(rarr)underset("Benzyl alcohol")(C_(6)H_(5)CH_(2)OH)+N_(2)uarr+H_(2)O` Aniline REACTS with `HNO_(2)` under the above conditions to form benzenediazonium chloride which on treatment with alkaline solution of b-naphthol gives an orange dye (Azodye TEST). For reactions, SEE (iii) above. |
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