Chemistry In Everyday Life Question 62
Question: Which of the following is a direct dye
Options:
A) Phenolphthalein
B) Congo red
C) Alizarin
D) Indigo is a deep blue color, traditionally associated with the dye derived from the indigo plant. It is commonly used in textiles and has historical significance in various cultures.
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Answer:
Correct Answer: B
Solution:
Direct dyes stick to the fibre through ion-dipole interactions. They belong to the class of azo dyes. They are used to dye the fabric directly by placing it in an aqueous solution of dye e.g. Martius yellow, Congored etc.
BETA
