Question

Terylene is a:
A. Polyamide
B. Polyester
C. Polyethylene
D. Polypropylene

Answer 1

In order to answer this question, we should know about the Terylene and how it is formed. Terylene is formed by the condensation polymerization of ethylene glycol and terephthalic acid. Ethylene glycol contains Hydroxyl groups whereas Terephthalic acid contains carboxyl groups.

Complete answer:
Let’s start this question with the definition of polymer. A polymer is a substance that contains macromolecules which means large molecules which are basically composed of repeating units are called monomers.
Now, let’s come to know about condensation polymerization. It involves a repetitive condensation of reaction between two monomers that contain two different functional groups.
Terylene is formed from the condensation polymerization of ethylene glycol and terephthalic acids at a temperature of about $460K$. Ethylene glycol consists of the hydroxyl group and the terephthalic acid contains a carboxyl group. So, the condensation reaction occurs between an alcohol group and carboxyl groups. Due to this reaction, it forms an ester which is known as Terylene.
Therefore, Terylene is a type of polyester which is obtained by the condensation reaction between a carboxylic acid, $( - COOH)$ and a hydroxyl group, $( - OH)$.
Hence, Terylene is polyester.
Hence the correct option is B.

Note:
We should remember that Terylene is a type of polyester and it has wide application like it is used in making fashion garments fabric. It is highly resistant to degradation by chemical bleaches and to abrasion also. It is also used for laundry usage as vacuum packaging machines. It is also used in making non-woven needle punched carpets for exhibition.