Chemistry - Polymer Question with Solution | TestHub

Thermosetting polymers are heavily branched or cross-linked polymers which on heating undergo extensive cross-linking in moulds and again become infusible. They cannot be reused.

Urea formaldehyde resin is a heavily cross-linked polymer and is a classic example of a thermosetting polymer.

Polystyrene is a thermoplastic polymer.

Polyesters and polyamides are generally classified as fibres or thermoplastics.

Answer: Urea formaldehyde resin