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Polymer Technology

Polymer Technology
__________ polythene is most prone to stress-cracking

Low density
Cross-linked
Linear low density
High density

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Polymer Technology
Which of the following additives are added to plastics to make it impervious to X-rays?

Carborundum
Barium salt
Asbestos
Phthalic acid

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Polymer Technology
Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m². Which of the following polymers has the maximum film elongation (of the order of 100%) ?

Polythene
Teflon
Water impermeable cellophane
Cellulose acetate

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Polymer Technology
Cellulose is the main contituent of most __________ fibres.

Spandex
Acrylic
Natural
Synthetic

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Polymer Technology
Most of the plastics are safe to be used upto a maximum temperature of __________ °C.

150
450
100
350

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Polymer Technology
Which of the following has the weakest intermolecular forces?

Polystyrene
Polyisoprene
Bakelite
Nylon-66

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