What is the primary function of an auxochrome in a dye?
Correct answer: B. To deepen or intensify the color and help it bind
- A. To produce the initial color
- B. To deepen or intensify the color and help it bind
- C. To make the dye insoluble in all solvents
- D. To act as a reducing agent
Explanation
An auxochrome is a functional group attached to a chromophore that modifies the ability of the chromophore to absorb light, thus altering the color of the dye. It can also enhance the intensity or brightness of the color and improve the binding of the dye to the material being dyed. Option B is correct because it accurately describes these roles. Option A is incorrect because producing the initial color is the job of the chromophore. Option C is incorrect because solubility is not primarily affected by auxochromes, and Option D is incorrect because auxochromes do not serve as reducing agents.
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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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