Number of compounds which give reaction with Hinsberg's reagent is ______.

Hinsberg's reagent reacts with primary ($$1^{\circ }$$) and secondary ($$2^{\circ }$$ amines). It does not react with tertiary ($$3^{\circ }$$ amines), amides, or diazonium salts under standard conditions.Analysis of the Compounds:

1. Benzene diazonium chloride: Does not react.
2. Benzimide (Amide): Does not react.
3. Aniline ($$1^{\circ }$$ amine): Reacts.
4. $$(N)$$-phenylpiperidine ($$3^{\circ }$$ amine): Does not react.
5. Benzyl methyl amine ($$2^{\circ }$$ amine): Reacts.
6. Ethane-1,2-diamine ($$1^{\circ }$$ amine): Reacts.
7. Piperidine ($$2^{\circ }$$ amine): Reacts.
8. Pyridine ($$3^{\circ }$$ amine): Does not react.
9. Propan-1-amine ($$1^{\circ }$$ amine): Reacts.
10. Urea (Amide): Does not react