Polymer Technology
Contact lenses for eyes are made of perspex, which is nothing but

Polymethylmethacrylate
Unsaturated polyester
Polypropylene
Polystyrene

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Polymer Technology
Dacron is a

Condensation polymerisation product of hexamethylene diamine and adipic acid
Condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol
Thermosetting material
None of these

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