Question

Diazo coupling is useful to prepare some

• A. pesticides
• B. dyes
• C. proteins
• D. vitamins

Answer 1

The Correct Option is B

To solve this question, we first need to understand what diazo coupling is and why it is significant.

Diazo coupling is a chemical reaction where a diazonium compound reacts with another aromatic compound to produce azo compounds. This type of reaction is important in organic chemistry. The general reaction can be represented as:

ArN_2^+ + Ar'H \rightarrow Ar-N=N-Ar' + H^+

where Ar and Ar' are aromatic groups. The product of this reaction is an azo compound, characterized by a nitrogen-nitrogen double bond (N=N). The azo compounds typically have vivid colors, which makes them valuable as dyes.

Given the options:

• Pesticides
• Dyes
• Proteins
• Vitamins

The correct answer is dyes because azo compounds are widely used as dyes in the textile and other industries due to their brilliant colors.

Let's briefly rule out other options:

• Pesticides: While some azo compounds may have applications in agriculture, diazo coupling's primary use is not in the synthesis of pesticides.
• Proteins: Proteins are natural polymers composed of amino acids, and they are not synthesized using diazo coupling reactions.
• Vitamins: Vitamins are organic compounds essential for normal growth and nutrition, but they are not typically prepared through diazo coupling reactions.

Therefore, the use of diazo coupling to prepare dyes is the correct option.