Which of these plastics cannot be repeatedly heated and moulded into any desired shape?
(a) Bakelite
(b) Formica
(c) Melamine
(d) all of these
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c) formica. (d) melamine. Polythene is a thermoplastic polymer consisting of long hydrocarbon chains. Thermoplastic polymers can be repeatedly heated and moulded into any desired shape.
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All of these is the answer
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