Which of the following polymers are obtained by condensation polymerization?
A. Terylene
B. Poly ethene
C. Teflon
D. Nylon 6,6
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → A and D only
In condensation (step growth) polymerisation, bifunctional monomers join with the loss of a small molecule such as water. In addition (chain growth) polymerisation, unsaturated monomers add to each other without losing anything.
A. Terylene — Correct. A polyester of ethane-1,2-diol and terephthalic acid; water is eliminated:
\( \displaystyle n\,\ce{HOCH2CH2OH} + n\,\ce{HOOC-C6H4-COOH} \to \ce{-(OCH2CH2OOC-C6H4-CO)_{n}-} + 2n\,\ce{H2O} \)
B. Poly ethene — Incorrect. Made by addition polymerisation of ethene: n \( \ce{CH2=CH2} \) → –(CH2–CH2)n–.
C. Teflon — Incorrect. Made by addition polymerisation of tetrafluoroethene.
D. Nylon 6,6 — Correct. Nylon 6,6 is a polyamide of hexamethylenediamine and adipic acid, formed with loss of water.
Note: This question is from the pre-rationalised NCERT book (2022-23). The topic is not there in the latest NCERT book (2026-27), and it is also out of the CUET 2026 syllabus.
NCERT (Pre-rationalised edition, 2022-23):
Condensation Polymerisation or Step Growth Polymerisation
