Civil Services Prep

Prelims 2021 · Science and Technology · Question 74

Bisphenol A (BPA), a cause of concern, is a structural/key component in the manufacture of which of the following kinds of plastics?

  1. Low-density polyethylene
  2. Polycarbonate
  3. Polyethylene terephthalate
  4. Polyvinyl chloride

Answer

Polycarbonate

  • (a) Low-density polyethylene (LDPE): Made by polymerizing ethylene; BPA is not a component. Incorrect.
  • (b) Polycarbonate: BPA is a key monomer used to manufacture polycarbonate plastics. Correct.
  • (c) Polyethylene terephthalate (PET): Made from ethylene glycol and terephthalic acid; BPA is not its structural component. Incorrect.
  • (d) Polyvinyl chloride (PVC): Produced from vinyl chloride monomer; BPA is not a key component. Incorrect.

Therefore, the correct answer is (b) Polycarbonate.

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