Regarding the compound ‘X’ incorrect statement is

The reaction is called carbyl amine test. This is a test to identify both alkyl and aryl primary amines. When a primary amine is heated with chloroform and alcoholic caustic photosh, a foul smelling carbylamine (or) isocyanide (-NC) is obtained. It is a functional isomer of (Benzene carbonitrite) covalency of nitrogen is four.