Which of the following groups is an example of a chromophore?
Correct answer: C. -N=N-
- A. -OH
- B. -NH₂
- C. -N=N-
- D. -SO₃H
Explanation
Chromophores are parts of molecules responsible for their color. The -N=N- group, known as an azo group, is a typical chromophore found in many dyes, contributing to their vibrant colors by absorbing specific wavelengths of light. The other groups, -OH, -NH₂, and -SO₃H, do not serve as chromophores; instead, they may act as auxochromes or solubilizing groups, modifying the properties of compounds in ways other than color.
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Industrial chemistry applies chemical reactions and material properties to the manufacture of adhesives, dyes and polymers. Coverage includes addition and condensation polymerisation, thermoplastics and thermosetting polymers, the structural basis of colour in dyes, and how adhesive composition enables bonding between surfaces.
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