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

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

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Polymer Technology
Identify the group in which all the polymers mentioned can be used to make fibres.

Butadiene copolymers, Polyamides, Urea aldehyde
Cellulose derivatives, Polyamides, Polyurathane
Polypropylene, Poly vinyl chloride, Silicon
Cellulose derivatives, Polyisoprene, Polyethylene

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Polymer Technology
Synthetic rubber

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

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