Which of the following will react with a primary amine to produce a diazonium salt?Select answer from the options belowsulfuric acidconcentrated fuming sulfuric acidnitric acidnitrous acidSave for LaterSubmit Answer

The compound that will react with a primary amine to produce a diazonium salt is nitrous acid.

Here's a step-by-step explanation:

1. A primary amine is an organic compound that contains a -NH2 group, which means it has one alkyl or aryl group attached to the nitrogen atom.

2. Diazonium salts are a group of organic compounds that share a common functional group, -N2+. The formation of diazonium salts is a crucial step in the industrial production of azo dyes.

3. The reaction to form a diazonium salt involves the replacement of the -NH2 group in the primary amine with a -N2+ group. This is achieved by reacting the primary amine with nitrous acid (HNO2).

4. Nitrous acid is a weak and unstable acid that can decompose to form nitrogen oxides and water. However, under cold conditions, it can react with primary amines to form diazonium salts.

Therefore, the correct answer is nitrous acid.