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Polymer Technology

Polymer Technology
Liners of bags are usually made of

PVC
Polyesters
Polythene
Polypropylene

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Polymer Technology
Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of __________ percent.

1000-1500
2000-2500
1500-2000
1-1000

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Polymer Technology
Softening point of high density polythene is about __________ °C.

135
85
165
205

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Polymer Technology
Poly Vinyl chloride (PVC) is a __________ material.

Thermoplastic
Thermosetting
Chemically active
Fibrous

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Polymer Technology
Catalyst used in the production of high density polythene by low pressure Ziegler process is

Nickel
Molybdenum
Aluminium triethyl activated with TiCl₄
Platinum

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Polymer Technology
Thermosplastic materials

Do not soften on application of heat
None of these
Are solvent insoluble
Are heavily branched molecules

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