Which among the following is a thermoplastic polymer?
- Melamine polymer
- Bakelite
- Polythene
- Urea-formaldehyde resin
Answer
(3) Polythene
Solution
Thermoplastic polymers are linear or slightly branched chains that soften on heating and harden on cooling repeatedly.
Melamine polymer, Bakelite and urea-formaldehyde resin are cross-linked thermosetting polymers.
As per NCERT, polythene, polystyrene and polyvinyls are thermoplastic polymers.
Answer: (3)