Choose the correct combinations: (A) Nylon 6: Addition copolymer (B)…

The correct answer is Option (2) → C, D only

Two classifications are combined here. Addition polymers form by repeated addition of unsaturated monomers; condensation polymers form with loss of small molecules such as water. A homopolymer is made from one kind of monomer, a copolymer from two or more different monomers.

• (A) Nylon 6: Addition copolymer — Incorrect. Nylon 6 is made from a single monomer, caprolactam, by ring-opening condensation; it is a condensation homopolymer.

• (B) Buna-S: Addition homopolymer — Incorrect. Buna-S is made by addition polymerisation of two monomers, 1,3-butadiene and styrene, so it is an addition copolymer.

• (C) Melamine: Condensation Copolymer — Correct. Melamine-formaldehyde resin is formed by condensation of two monomers, melamine and formaldehyde.

• (D) Teflon: Addition homopolymer — Correct. Teflon is obtained by addition polymerisation of a single monomer, tetrafluoroethene (\( \ce{CF2=CF2} \)).

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):
Addition Polymers – “The addition polymers are formed by the repeated addition of monomer molecules possessing double or triple bonds, e.g., the formation of polythene from ethene and polypropene from propene. However, the addition polymers formed by the polymerisation of a single monomeric species are known as homopolymers, e.g., polythene. The polymers made by addition polymerisation from two different monomers are termed as copolymers, e.g., Buna-S, Buna-N, etc.”

Preparation of Nylons – …

Melamine – Formaldehyde Polymer

Polytetrafluoroethene (Teflon)