1.

Find the odd one out :(i) Bakelite, Melamine, Polystyrene, Polyester.(ii) Polyvinyl chloride, Polystyrene, Polypropylene, Polyurethane.

Answer»

(i) Polystyrene (All others are thermosetting plastic materials, polystyrene is thermoplastic.)

(ii) Polyurethane (All others are thermoplastic materials, polyurethane is thermosetting plastic.)



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