Hinsberg’s reagent is

The amine that reacts with Hinsberg's reagent to give an alkali-insoluble product is:

Which of the following gives $RNC$ when reacted with $CHCl_3$ and $KOH$?

Which one of the products of the following reactions does not react with Hinsberg reagent to form sulphonamide?

The test used to distinguish between primary,secondary,and tertiary amines is:

An organic compound '$X$' showing the following solubility profile is:
'$X$' $\xrightarrow{\text{water}}$ Insoluble
'$X$' $\xrightarrow{5\% \,HCl}$ Insoluble
'$X$' $\xrightarrow{10\% \,NaOH}$ Insoluble
'$X$' $\xrightarrow{10\% \,NaHCO_3}$ Insoluble