Question

Identify the monomers used in preparation of dacron.

• A. $C_{6}H_{5}$ and $CH_{2}O$
• B. $H_{2}C=CH-CH=CH_{2}$ and $H_{2}C=CH-CN$
• C. $HO(CH_{2})_{2}-OH$ and $HO-C(=O)-C_{6}H_{4}-C(=O)-OH$
• D. $H_{2}C=CH-CN$ and $C_{6}H_{5}OH$

Hint:

Dacron = Ethylene Glycol + Terephthalic Acid.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
Dacron (also known as Terylene) is a polyester. We need to identify the diol and dicarboxylic acid monomers used to synthesize it.

Step 3: Detailed Explanation:
Dacron is prepared by the condensation polymerization of:
1. Ethylene glycol: \( \text{HO-CH}_2\text{-CH}_2\text{-OH} \).
2. Terephthalic acid: Benzene-1,4-dicarboxylic acid, \( \text{HOOC-C}_6\text{H}_4\text{-COOH} \).
The monomers in option (C) correspond to these two structures.
Option (A) is for Bakelite.
Option (B) is for Buna-N rubber.

Step 4: Final Answer:
The monomers are Ethylene glycol and Terephthalic acid, shown in option (C).