JEE Main · 2005 · 08 May 2005 · Offline · Compounds Containing Nitrogen

This asks for the odd method out, the one with nothing to do with amines. Hinsberg's test separates and distinguishes primary, secondary and tertiary amines; Hofmann's bromamide reaction makes primary amines from amides; and the Curtius rearrangement makes amines from acyl azides. The Wurtz reaction, by contrast, couples two alkyl halides with sodium to build larger alkanes, $\mathrm{R}-\mathrm{X}+2\mathrm{Na}+\mathrm{X}-\mathrm{R}\to \mathrm{R}-\mathrm{R}+2\mathrm{NaX}$, so it neither prepares nor separates amines.