Question

Match List I with List II 

Choose the correct answer from the options given below:

• (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
• (A) - (I), (B) - (II), (C) - (IV), (D) - (III)
• (A) - (II), (B) - (I), (C) - (IV), (D) - (III)
• (A) - (IV), (B) - (III), (C) - (II), (D) - (I)

Hint:

Remember that "Azoic" coupling reactions require ice, making them "Ice colors".
Also, "Acid" dyes are the standard choice for protein fibers like wool and silk.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Dyes are classified based on their chemical structure and application methods.
Each dye class has a specific affinity for different fiber types.

Step 2: Detailed Explanation:
- (A) Acid dyes: These are anionic dyes that form ionic bonds with the cationic groups in protein fibers (wool, silk) and nylon under acidic conditions. Thus, (A) matches (IV).
- (B) Azoic dyes: These dyes are insoluble azo compounds synthesized directly inside the fiber.
The coupling reaction requires low temperatures, which are achieved by adding ice to the dye bath.
Because of this, they are commonly referred to as ice colors. Thus, (B) matches (III).
- (C) Cationic dyes (Basic dyes): The first synthetic dye, Mauveine, discovered by William Henry Perkin in 1856, was a cationic dye.
Thus, cationic dyes represent the birth of synthetic dyes. Thus, (C) matches (II).
- (D) Disperse dyes: These are non-ionic, hydrophobic dyes used for polyester.
Because of polyester's tight structure, chemical swelling agents called carriers (like phenol derivatives) are used to help the dye penetrate at boiling temperatures under atmospheric pressure. Thus, (D) matches (I).
This pairing results in the sequence: (A) - (IV), (B) - (III), (C) - (II), (D) - (I).

Step 3: Final Answer:
The correct matching sequence corresponds to option (D).