Primary amine gives soluble compound.
The secondary and tertiary amines gives insoluble compounds.
The secondary amine reacts with benzenesulfonyl chloride to give insoluble compound which is insoluble in alkali.
$I.$ ${Sn}-{HCl}$ $II.$ ${Sn}-{NH}_{4} {OH}$ $III.$ ${Fe}-{HCl}$ ${IV} . {Zn}-{HCl}$ $V.$ ${H}_{2}-{Pd}$ $VI.$ ${H}_{2}-$ રેની નિકલ