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Polymer Technology

Polymer Technology
Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of

Bunai N
Cold SBR
Butyl rubber
Buna S

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Polymer Technology
Scouring is a finishing operation during the manufacture of fibre, which aims at __________ of fibres.

Dyeing/colouring
Improving the stretchability
Detergent solution washing
Glycol soaking

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Polymer Technology
Neoprene is rendered non-inflammable, because of

Its linear chain structure
The presence of chlorine atoms in its monomer
Its cross-linked structure
The absence of chlorine atoms in its monomer

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Polymer Technology
In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is

Polybutadiene
Terylene
Polypropylene
PVC

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

Nitro cellulose
Camphor
Glycerol
None of these

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Polymer Technology
Transistor parts and refrigerator components are normally made of

High density polythene
Polystyrene
Polyurathane
Polyester

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