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Polymer Technology

Polymer Technology
__________ is a homopolymer.

Neoprene
Terylene
Bakelite
Nylon-66

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Polymer Technology
Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.

Organic peroxides
None of these
Hydroflouric acid
Sulphuric acid

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Polymer Technology
The physical state in which polymers exist is

All of these
Partially crystalline state
Amorphous glassy state
Melts & rubber like state

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Polymer Technology
Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding

Glycerol
None of these
Camphor
Nitro cellulose

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Polymer Technology
Which of the following is generally not used as eord for synthetic rubber tyre casing?

Cellulose
None of these
Nylon
Dacron

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Polymer Technology
Buna-S is a __________ material.

Rubbery
Fibrous
Resinous
Plastic

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