Match List I with List II
| List I | List II |
| (A) Buna-S | (I) Vinyl chloride |
| (B) Neoprene | (II) 1,3-Butadiene and styrene |
| (C) PVC | (III) Tetrafluoroethene |
| (D) Teflon | (IV) Chloroprene |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A)-(II), (B)-(IV), (C)-(I), (D)-(III)
(A) Buna-S — This matches (II) 1,3-Butadiene and styrene. A copolymer of the two monomers:
\( \displaystyle n\ce{CH2=CH-CH=CH2} + n\ce{C6H5CH=CH2} \longrightarrow \ce{-[CH2-CH=CH-CH2-CH2-CH(C6H5)]_n-} \)
(B) Neoprene — This matches (IV) Chloroprene. Free radical polymerisation of chloroprene (2-chlorobuta-1,3-diene):
\( \displaystyle n\ce{CH2=C(Cl)-CH=CH2} \longrightarrow \ce{-[CH2-C(Cl)=CH-CH2]_n-} \)
(C) PVC — This matches (I) Vinyl chloride. Polyvinyl chloride is the addition polymer of \( \ce{CH2=CHCl} \):
\( \displaystyle n\ce{CH2=CHCl} \longrightarrow \ce{-[CH2-CHCl]_n-} \)
(D) Teflon — This matches (III) Tetrafluoroethene. Tetrafluoroethene is heated with a free radical or persulphate catalyst at high pressure:
\( \displaystyle n\ce{CF2=CF2} \xrightarrow[\text{high pressure}]{\text{catalyst}} \ce{-[CF2-CF2]_n-} \)
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.