In the carbylamine test for primary amines,the resulting foul-smelling product is:

$A$ colourless organic compound gives brisk effervescence with a mixture of sodium nitrite and dil. $HCl$. It could be

Which of the following compounds gives the dye test?

Which one of the following compounds gives a blue color when treated with nitrous acid $(HNO_2)$?

Which of the following does not reduce Tollen’s reagent?

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?