Question

Which of the following is a condensation polymer?
A. Buna - S
B. Nylon 6, 6
C. Teflon
D. Neoprene

Answer 1

Hint: We should be having enough knowledge about the characteristics of a polymer in order to classify the options into the required criteria. Even the structures of the options should also be cleared to us. Think about the structures and monomeric units of all the given polymers. What reactions do molecules undergo during polymerization?

Complete step by step answer:
Condensation Polymers are any kind of polymers which are formed through a condensation reaction where molecules join together resulting in the loss of small molecules as by products such as water or methanol.
To categorize the options into the following criteria we need to observe the structure of each and at the same time, classify each of them:
Buna - S : Here is the formation of Buna - S

As seen, from the diagram the formation of Buna-S involves the combination of 1, 3-Butadiene and Styrene, in the presence of heat. The process is called emulsion polymerization. Buna - S is a kind of synthetic rubber. And not a condensation polymer, because it is formed by emulsion polymerization.
Nylon 6, 6 : Here is the structure of Nylon 6, 6.

Nylon is obtained from the reaction of adipic acid and hexamethylenediamine. As we can see, one $O{{H}^{-}}$ is lost from adipic acid and one ${{H}^{+}}$ is lost from hexamethylenediamine. They then combine to form water. Thu, the loss of 1 water molecule occurs during the formation of this polymer.
So, it is an example of condensation polymer.
Teflon: Here is the structure of Teflon:

Teflon is formed by the process of addition polymerization. So, it is not a condensation polymer.
Lastly,
Neoprene: Here is the structure of Neoprene:

Neoprene is an example of addition polymer. So, it cannot be a condensation polymer.
Thus, from the options, only Nylon-6,6 is an example of condensation polymer.
So, the correct answer is “Option B”.

Note: We should know that because Nylon-6,6 is a light weight material, it is used in parachutes. It is also waterproof in nature, so it is also used in the making of swimwear. Remember that Buna-S does not lose any atoms during formation.