Nessler's reagent is

$p$-toluenesulphonyl chloride is known as Hinsberg's reagent. Which of the following statements is $NOT$ correct for it?

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.

Which of the following amines does not give the isocyanide test?

The test that distinguishes primary amines from other amines is

Which of the following cannot give the carbylamine reaction?