Q. Plastic that softens when heated and hardens when cooled?

A
Thermosetting plastic
B
Thermoplastic
C
Bioplastic
D
Synthetic plastic
Solution:

Thermoplastic – softens when heated and hardens when cooled, only changes material when heated.

These are linear polymers in which the monomers are joined in a straight line.

E.g. Polyethylene – used to make various packets, tubes and containers, and polyvinyl chloride (PVC) – used to make electrical wiring, plumbing, shoes, handbags, raincoats, bottles and furniture.

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