Chemistry In Everyday Life Question 87
Question: Which one is acidic dye
[DCE 1996]
Options:
A) Methyl orange
B) Methyl red
C) Phenolphthalein
D) All of these
Show Answer
Answer:
Correct Answer: A
Solution:
Acid dyes are characterised by the presence of -COOH, $ -SO_3H $ or Phenolic group. They are applied in the presence of acidic solution. They are usually applied to Wool, Silk, Nylon. They have affinity for cotton. Common examples are Orange I, Orange II, Methyl red etc.
BETA
