Benzoyl chloride is not used as a catalyst in the manufacture of
A. Polystyrene
B. Polyvinyl acetate
C. Polypropylene
D. Polyvinyl chloride-co-vinylacetate
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Celluloid is
A. Cellulose acetate
B. Regenerated cellulose
C. Cellulose nitrate
D. Cellulose acetate butyrate
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The process involved in converting rubber into a thin sheet or coating it on fabric is called
A. Extrusion
B. Mastication
C. Calendering
D. Vulcanisation
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Styrene butadiene rubber (SBR) as compared to natural rubber has
A. Poor tensile strength
B. Poorer resistance
C. Greater amount of heat build up heavy loading
D. All of the above
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The major component of acrylic fibres is
A. Polyamides
B. Polyolefins
C. Polyacrylonitrile
D. Polyesters
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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.
A. Organic peroxides
B. Sulphuric acid
C. Hydroflouric acid
D. None of these
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Main constituent of cotton fibre is
A. Lignin
B. Cellulose
C. Starch
D. Gelatine
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Cross linked polymers are
A. Thermoplastic
B. Thermosetting
C. Either A or B
D. Fibres only
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Starting material for the production of butadiene in India is
A. Naphthalene
B. Benzol
C. Ethyl alcohol
D. Phthalic anhydride
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Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about __________ ° C.
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Thermocole (expanded polystyrene) is not used for
A. Low temperature thermal insulation as in refrigerator and air conditioners
B. Accoustic control and ceiling for building
C. High temperature thermal insulation in furnaces
D. Packing of delicate electronic gadgets
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Low density polythene as compared to high density polythene is
A. Harder
B. Tougher
C. Chemically inert
D. More flexible
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Dacron is a
A. Condensation polymerisation product of hexamethylene diamine and adipic acid
B. Condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol
C. Thermosetting material
D. None of these
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Dacron is a/an
A. Polyester
B. Unsaturated polyester
C. Polyamide
D. Inorganic polymer
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Acrylonitrile-butadiene-styrene (ABS) copolymer, which is produced by blending styrene-acrylonitfile copolymer with butadiene based elastomer, is a/an
A. Rigid foam
B. Engineering plastic
C. Thermosetting polymer
D. Spongy rubber
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__________ are produced by reacting polybasic acid (e.g. phthalic anhydride) with polyhydric alcohol (e.g., glycerol).
A. Unsaturated polyester
B. Alkyd resins
C. Saturated polyester
D. Amino resins
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Collapsible tubes for tooth paste are produced by __________ extrusion.
A. Direct
B. Indirect
C. Impact
D. None of these
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Nitrile rubber is produced by the polymerisation of
A. Acrylonitrile & butadiene
B. Acrylonitrile & styrene
C. Isobutylene & isoprene
D. None of these
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Cellulose content in bomboo fibre is about __________ percent.
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Buna-N is also called
A. Butyl rubber
B. Nitrile rubber
C. Neoprene
D. Thiokol
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