Polymer Technology
Rayon is superior to cotton in making gauge for wound treatment, because rayon

Both B & C
Can absorb over 90% of its own weight of water
Does not stick to the wound unlike cotton
Is a synthetic polymer

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Polymer Technology
Thermocole (expanded polystyrene) is not used for

Packing of delicate electronic gadgets
Accoustic control and ceiling for building
Low temperature thermal insulation as in refrigerator and air conditioners
High temperature thermal insulation in furnaces

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Polymer Technology
Synthetic rubber

Is softer at higher temperature
Deforms, if stretched to double of its original dimension
Is brittle at low temperature
Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases

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