Question

Terylene is the polymer of

• A. Melamine and formaldehyde
• B. Ethylene glycol and terephthalic acid
• C. Vinyl chloride and formaldehyde
• D. Hexamethylene diamine and adipic acid

Hint:

Terylene = PET = ethylene glycol + terephthalic acid.

Answer 1

The Correct Option is B

Concept:
Terylene is a polyester. It is also known as polyethylene terephthalate or PET. It is formed by condensation polymerization between a diol and a dicarboxylic acid.

Step 1: Identify the monomers of Terylene.
Terylene is made from: \[ \text{Ethylene glycol} \] and \[ \text{Terephthalic acid} \] Ethylene glycol has two alcohol groups: \[ HOCH_2CH_2OH \] Terephthalic acid has two carboxylic acid groups: \[ HOOC-C_6H_4-COOH \]

Step 2: Understand condensation polymerization.
The \(-OH\) group of glycol and \(-COOH\) group of acid react. Water is eliminated. Ester linkage is formed: \[ -COO- \] So the polymer is a polyester.

Step 3: Check the options.
Option (A) melamine and formaldehyde form melamine-formaldehyde resin.
Option (B) ethylene glycol and terephthalic acid form Terylene, so it is correct.
Option (C) vinyl chloride forms PVC, not Terylene.
Option (D) hexamethylene diamine and adipic acid form Nylon-66. Hence, the correct answer is: \[ \boxed{(B)\ \text{Ethylene glycol and terephthalic acid}} \]