Question

Condensation polymer among following polymer is
A. Teflon
B. Polystyrene
C. PVC
D. Dacron

Answer 1

Condensation polymers are those which are formed by repeated condensation reactions between two different tri-functional or bi-functional monomeric units. Elimination of small molecules like water , alcohol etc: takes place during the reaction. Here small units monomers are grouped together to form large units called polymers.

Complete step by step solution:
Condensation polymers are those which are made from condensation polymerization or it is one in which monomers are grouped together to form large structural units.

Let us now consider the options given:
- As when we take the case of Teflon , polystyrene , PVC these are formed by polymerization which is addition polymerization reaction (second category of polymerization rather than condensation polymerization) but not condensation polymerization reaction .
- Here polystyrene and Teflon are polyalkenes which can only be produced by addition polymerization. So these prove Teflon , PVC, polystyrene to be the wrong option.
- Dacron is a condensation polymer which is formed by condensation polymerization reaction of terephthalic acid and ethylene glycol.
- During this reaction, water is eliminated as a side product which agrees to the concept of polymerization reaction as mentioned in the hint.

Therefore option D is the correct answer.

Note: First we need to have an idea about different categories of the polymerization reaction and especially their examples. Terylene is another name for Dacron. Production of polyesters include usage of harmful chemicals which is highly carcinogenic in nature. Emitting of these toxic gases can cause consequent environmental damages.