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Polymer Technology

Polymer Technology
Tyres are made by

Rotational moulding
Compression moulding
Extrusion
Injection moulding

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Polymer Technology
Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex?

Both A & B
Neither A nor B
Potassium alum
Ammonium alum

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Polymer Technology
Polycondensation reaction of polymerisation

Produces epoxy polymers
Produces only thermoplastic material
Does not produce linear polymers
Does not need any catalyst

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Polymer Technology
Styrene which is a monomer for the production of polystyrene, is commercially produced by the

Fermentation of starch
Dehydration of ethyl alcohol followed by hydrogenation
Reacting ethylene oxide with acetal-dehyde
Catalytic dehydrogenation of ethyl benzene

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Polymer Technology
Bristles of tooth brushes are made of

Nylon-6
Nylon-66
PVC
Polystyrene

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Polymer Technology
Contact lenses for eyes are made of perspex, which is nothing but

Unsaturated polyester
Polymethylmethacrylate
Polypropylene
Polystyrene

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