Match List-I with List-II and select the correct answer using the code given below the Lists : List-I List-H (Compound) (Type of polymer) A. Melamine 1. Linear B. Polyvinyl chloride 2. Condensation C. Terylene 3. Natural D. Cellulose 4. Cross-linked Code :

The classification of polymers is based on their structure, origin, and synthesis method. Melamine (Melamine-formaldehyde) is a thermosetting plastic characterized by an extensive 3D cross-linked network, providing high heat resistance. Polyvinyl chloride (PVC) is an addition polymer that typically forms linear or slightly branched chains, making it a versatile thermoplastic. Terylene (Dacron) is a polyester formed through condensation polymerization, where monomers react with the elimination of small molecules like water. Cellulose is a naturally occurring polysaccharide found in plant fibers, classifying it as a natural polymer. Matching these: A-4 (Melamine: Cross-linked), B-1 (PVC: Linear), C-2 (Terylene: Condensation), and D-3 (Cellulose: Natural). This corresponds to the sequence 4, 1, 2, 3.