Q. Which is not included in the thermoplastics:

A
Celluloid
B
Polythene
C
Bakelite
D
Nylon
Solution:

A thermoplastic is a material, usually a plastic polymer, which becomes soft when heated and hard when cooled. Thermoplastic materials can be cooled and heated several times without any change in their chemistry or mechanical properties. When thermoplastics are heated, they melt to a liquid.

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