Which of the following can be categorized as a thermoplastic? Polystyrene (PS) Sheet Moulding Compounds (SMC) Polyethylene terephthalate (PET) Bakelite Polyurethane Select the correct answer from the codes given below:

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[A] 1, 3 and 5

[B] 2, 4 and 5

[C] 1 and 3 only

[D] 1, 2, 4 and 5

Answer: C

Notes:

Plastics are generally categorized into two types:

Thermoplastics: Thermoplastics or Thermo-softening plastics are the plastics which soften on heating and can be molded into desired shape such as PET, HDPE, LDPE, PP, PVC, PS, etc.
Thermosets: Thermoset or thermosetting plastics on heating, cannot be re-moulded or recycled such as Sheet Moulding Compounds (SMC), Fiber Reinforced Plastic (FRP), Bakelite etc. are the examples of the same.

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