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
Show Answer
Answer:
Correct Answer: B
Solution:
Direct dyes stick to the fibre through hydrogen bonding. They belong to the class of azo dyes. They are used to dye the fabric directly by placing it in not aqueous solution of dye e.g. martius yellow, Congored etc.
BETA
