Identify the polymer used to prepare disposable cups and plates.

Step-by-step solution

Polystyrene is a synthetic aromatic hydrocarbon polymer made from the monomer styrene. It is widely used in the manufacture of disposable cups, plates, toys, radio and television cabinets, and as a wrapping material. Polypropylene is used for ropes, toys, pipes, and fibres. Polyethylene terephthalate (PET) is used for making bottles and synthetic fibres. High density polyethylene (HDPE) is used for buckets, dustbins, bottles, and pipes. Answer: Polystyrene