Exams › JEE Advanced › Chemistry

Diazo coupling reactions are mainly used for the preparation of which class of compounds?

1. pesticides
2. dyes
3. proteins
4. vitamins

Correct answer: dyes

Solution

Coupling of an aryl diazonium salt with phenols or aromatic amines forms azo compounds (-N=N-), which are intensely coloured and widely used as dyes.

Related JEE Advanced Chemistry questions

• Which of the following transformations represents the correct reduction of an amide using LiAlH4?
• Among arylamines, alkylamines, and ammonia, the order of basic strength is:
• When C₆H₅NH₂ reacts with AlCl₃ and CH₃Cl, no reaction occurs. What can be inferred about the directing nature of the (-NH₂, AlCl₃) substituent?
• Diazomethane is capable of transferring a methyl group to certain functional groups. Compound IV contains an enolic —OH group, so it can undergo methylation by CH₂N₂. Which of the following is correct?
• In the reaction sequence: A --[SnCl2/HCl]--> B --[NaNO2/HCl, 0 deg C]--> C --[H2O/heat]--> C6H5OH. Identify compounds A, B, and C.
• Which of the following chemical tests can specifically identify a primary amino (-NH2) group in an organic compound?

⚔️ Practice JEE Advanced Chemistry free + battle 1v1 →