Polymers and Plastics

A polymer is a large, complex molecule composed of many repeating structural units called monomers, which are smaller molecules linked together.

Thermoplastic is the right answer.

FALSE

FALSE

Rubber is a natural polymer (cis-1,4-polyisoprene). Concrete is a composite material, copper is a metal element, and wood is a complex natural material composed of cellulose fibers but not typically classified as a polymer in basic chemistry.

PVC stands for Polyvinyl Chloride, which is a widely used synthetic plastic polymer. The term comes from poly (many), vinyl (the vinyl group), and chloride (chlorine compound). PVC is commonly used in construction pipes, flooring, and medical equipment.

PVC (Polyvinyl Chloride) is widely used for plumbing pipes and electrical wiring insulation due to its durability, chemical resistance, and insulating properties. Nylon and Teflon have other specialized applications. 'Ploythene' appears to be a misspelling of polyethylene, which is also used for pipes but PVC is more common in plumbing.

Thermosetting plastics undergo a chemical change during curing and cannot be softened or remoulded by heating once set.

PET (Polyethylene terephthalate) is a well-known type of polyester used in bottles and clothing fibres.

Melamine is a thermosetting plastic known for its heat resistance, whereas PVC and Polythene are thermoplastics.

Teflon (PTFE) is a non-stick polymer used on cookware and irons due to its low coefficient of friction and heat resistance.

Melamine is a thermosetting plastic with high fire and heat resistance, making it suitable for protective gear.

Polyesters are polymers formed by the condensation polymerization of monomers containing ester functional groups. The name itself indicates the presence of multiple ester linkages.

A polymer is a large molecule (macromolecule) composed of many repeating structural units called monomers. The process of joining these units is called polymerization.