Carbylamine test is performed by heating alcoholic $KOH$ with:

Which of the following does not react with $HNO_2$?

Which test is used to identify a primary amino group in a given organic compound?

For the identification of $\beta$-naphthol using dye test,it is necessary to use :

Find out the reaction in which the obtained product gives a positive isocyanide test.

Give one chemical test to distinguish between the following pairs of compounds:
$(i)$ Methylamine and dimethylamine
$(ii)$ Secondary and tertiary amines
$(iii)$ Ethylamine and aniline
$(iv)$ Aniline and benzylamine
$(v)$ Aniline and $N$-methylaniline.