2018 · Q11
Match List-I with List-II and select the correct answer using the code given below the Lists:
List I (Compound):
- AMelamine,
- BPolyvinyl chloride,
- CTerylene,
- DCellulose
List II (Type of polymer):
- 1Linear,
- 2Condensation,
- 3Natural,
- 4Cross-linked Code:
general-sciencechemistry
- AA-3, B-2, C-1, D-4
- BA-4, B-1, C-2, D-3
- CA-3, B-1, C-2, D-4
- DA-4, B-2, C-1, D-3
Explanation
Melamine–formaldehyde resin is a thermosetting, cross-linked polymer (A-4); PVC is a linear chain polymer (B-1); Terylene (PET polyester) is formed by condensation of ethylene glycol and terephthalic acid (C-2); cellulose is a naturally occurring polymer (D-3). Cross-linked and linear describe chain architecture, condensation describes the polymerization mechanism, and natural describes origin — each List-I item matches exactly one. Hence the code is A-4, B-1, C-2, D-3.