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