Insoluble nitrosoamines (R2N−N=O) on heating with conc. H2SO4 produces secondary amines. This reaction is called :
Primary amine on heating with CS2 followed by excess of mercuric chloride gives Isothiocyanate. The reaction is called
BaCl2+H2SO4→BaSO4↓+2HCl. The reaction given above is an example of: