The auxochrome not concern with Metanil yellow dye:
Correct answer: A. -SO3H
- A. -SO3H
- B. -OH
- C. -NH2
- D. Both -SO3H and -NH2
Explanation
Auxochromes are groups that enhance color by altering the electron distribution in a chromophore. Metanil yellow dye contains -SO₃H (solubility) and -NH₂ (color intensification) as auxochromes. The -OH group is not present and thus does not contribute to this dye's color.
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