MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

The Sandmeyer reaction involves the conversion of an aryl diazonium salt into an aryl halide using copper(I) salts, such as CuCl or CuBr. The Mendius reaction is the reduction of nitriles to primary amines using sodium and ethanol. The Hofmann rearrangement reaction involves the conversion of a primary amide to a primary amine with one fewer carbon atom using bromine and a strong base. The carbylamine reaction is a test for primary amines, where a primary amine reacts with chloroform and a base to form an isocyanide. Therefore, only the Sandmeyer reaction uses a diazonium salt. Answer: Sandmeyer reaction