Concept:Polystyrene is a low-cost, lightweight thermoplastic commonly moulded into disposable food-service items.
Explanation:Polystyrene is obtained by the polymerization of the monomer styrene (
C8​H8​).
It has good thermal insulation and can be easily moulded into rigid or foamed forms.
The foamed form, often called thermocol, is widely used for disposable cups and plates.
Polypropylene (option A) is tougher and is used mainly for containers and packaging.
Polyethylene terephthalate (option C) is used for beverage bottles and food trays.
High density polyethylene (option D) is used for bottles, jugs, and pipes.
Therefore, among the given options,
Polystyrene is the correct polymer for disposable cups and plates.
Answer:Option B:
Polystyrene