Hinsberg's reagent is

Hinsberg’s reagent is

The test used to distinguish between primary,secondary,and tertiary amines is:

Which among the following reagents is used to distinguish primary $(1^{\circ})$,secondary $(2^{\circ})$,and tertiary $(3^{\circ})$ amines according to their solubility in an alkaline medium?

Which of the following does not give the isocyanide test?

Primary and secondary amines are distinguished by