6. Which of these plastics can be repeatedly heated and moulded into any desired shape
b. polythene
a. bakelite
c. formica
d. melamine
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Polythene ⁱˢ ᵗʰᵉ ᶜᵒʳʳᵉᶜᵗ ᵒᵖᵗⁱᵒⁿ
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