Polymer Technology MCQs : This section focuses on the "Polymer Technology". These Multiple Choice Questions (MCQs) should be practiced to improve the Polymer Technology skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
__________ is not a polyester fibre.
A. Terylene
B. Dacron
C. Nylon
D. Polyacrylonitrite
Question 2
__________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine.
A. Epoxy
B. Amino
C. Alkyd
D. Phenolic
Question 3
__________ tubes are good substitude for human blood vessels onrheart by-pass operation.
A. PVC
B. Polythene
C. Teflon/dacron
D. Polystyrene
Question 4
90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of __________ °C.
A. -5
B. Oct-30
C. 250-280
D. 500-600
Question 5
Automobile steering wheels are normally made of
A. cellulose acetate
B. cellulose nitrate
C. PVC
D. high density polythene
Question 6
Buna-S is a __________ material.
A. fibrous
B. plastic
C. resinous
D. rubbery
Question 7
Buna-S is also known as
A. teflon
B. PTFE
C. SBR
D. polycrylates
Question 8
Caprolactum, a raw material for the manufacture of nylon-6, is produced from
A. phenol
B. naphthalene
C. benzene
D. pyridine
Question 9
Celluloid is
A. cellulose acetate
B. regenerated cellulose
C. cellulose nitrate
D. cellulose acetate butyrate
Question 10
Cellulose is the main contituent of most __________ fibres.
A. acrylic
B. spandex
C. synthetic
D. natural
Question 11
Dacron (or terylene) fibres as compared to nylon fibres have
A. better heat & acid resistant properties.
B. poorer resistance to alkalis.
C. poorer dyeability.
D. all (a), (b) and (c).
Question 12
Dacron is a/an
A. polyester
B. unsaturated polyester
C. polyamide
D. inorganic polymer
Question 13
Density of high density polythene is about __________ gm/c.c.
A. 1.18
B. 1.05
C. 0.95
D. 0.99
Question 14
Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of
A. cold SBR
B. butyl rubber
C. Bunai N
D. Buna S
Question 15
Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its
A. elasticity
B. strength
C. plasticity
D. weathering characteristics
Question 16
In a cross linked polymer, the monomeric units are linked together to constitute a three dimensional network. Which of the following is a cross-linked polymer ?
A. Bakelite (phenol formaldehyde)
B. Polyester
C. Polythene
D. Nylon-6
Question 17
Lavatory cisterns are normally made of
A. expanded polystyrene
B. saturated polyester
C. perspex
D. PVC
Question 18
Mastication of rubber means
A. its softening.
B. a treatment to retard its deterioration due to oxidation.
C. improving its curing rate.
D. depression of its freezing point.
Question 19
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 ?
A. Ammonium alum
B. Potassium alum
C. both a & b
D. neither a nor b
Question 20
Neoprene is a
A. monomer
B. synthetic rubber
C. polyester
D. none of these
Question 21
Neoprene is chemically known as
A. polybutandiene
B. styrene butadiene rubber (SBR)
C. polyurethane
D. poly chloroprene
Question 22
Neoprene is the trade name of
A. polyurethane
B. phenol formaldehyde
C. polychlorophrene
D. styrene butadiene rubber (SBR)
Question 23
Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is
A. chloroethane
B. chlorophrene
C. isoprene
D. none of these
Question 24
Nitrile rubber is produced by the polymerisation of
A. acrylonitrile & butadiene.
B. acrylonitrile & styrene.
C. isobutylene & isoprene.
D. none of these.
Question 25
Nylon-6 is manufactured from
A. caprolactum.
B. adipic acid and hexamethylene diamine.
C. maleic anhydride and hexamethylene diamine.
D. sebasic acid and hexamethylene diamine.
Question 26
Orlan fibre which is used as a wool sub stitute is
A. an amorphous polymer.
B. a natural polymeric fibre.
C. polyacrylonitrile.
D. polymethylmethacrylate (PMMA).
Question 27
Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of __________ percent.
A. 1-1000
B. 1000-1500
C. 1500-2000
D. 2000-2500
Question 28
Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to
A. protect rubber goods from attack by oxygen & ozone present in the atmosphere.
B. reduce its viscosity to permit easier processing.
C. reduce the time of vulcanisation and quantity of vulcanising agent.
D. increase its viscosity.
Question 29
Plasticisers are added to synthetic plastics to
A. impart flexibility.
B. improve workability during fabrication.
C. develop new improved properties not present in the original resin.
D. all (a), (b) and (c).
Question 30
Polymethyl methacrylate (PMMA) is known as
A. bakelite
B. teflon
C. perspex
D. nylon-6
Question 31
Reaction of dimethyl terephthalate (DMT) and ethylene glycol produces
A. nylon-6
B. dacron
C. polyester
D. PVC
Question 32
SBR is produced by the copolymerisation of butadiene & styrene by employing emulsion polymerisation. The weight ratio of styrene and butadiene is maintained at
A. 01:03
B. 03:01
C. 01:02
D. 02:01
Question 33
Starting material for the production of SBR is
A. ethyl alcohol
B. ethylene
C. both (a) & (b)
D. neither (a) nor (b)
Question 34
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 (a), (b) ana (c).
Question 35
The main use of butadiene is
A. as a plasticiser for unsaturated polyester.
B. in the manufacture of synthetic rubber.
C. as an anti-skimming agent in paint.
D. none of these.
Question 36
The monomer of poly vinyl chloride (PVC) is
A. chloroethene
B. ethylene dichloride
C. ethyl chloride
D. chloroform
Question 37
The organic acid monomer in nylon 66 is
A. sebasic acid
B. terephthalic acid
C. adipic acid
D. benzoic acid
Question 38
The synthetic fibres produced from __________ are known as rayon.
A. lignin
B. cellulose
C. polyamides
D. ethylene glycol
Question 39
Thiokol is nothing but
A. polysulphide rubber
B. polyamide fibre
C. engineering plastic
D. exponded polystyrene
Question 40
Trade name of __________ is neoprene.
A. polychloroprene
B. polyisoprene
C. polytetraflouroethylene
D. poly vinyl acetate
Question 41
Transistor parts and refrigerator components are normally made of
A. polystyrene
B. polyester
C. high density polythene
D. polyurathane
Question 42
Tubeless tyres are made of __________ rubber, which is a co-polymer of isoprene & isobutylene.
A. nitrile
B. silicone
C. neoprene
D. butyl
Question 43
Vinyl flooring is done using __________ sheets.
A. polypropylene
B. PVC
C. polythene
D. polyvinyl acetate
Question 44
Visco-elastic behaviour exhibited by plastics is a __________ like behaviour.
A. solid
B. liquid
C. combination of solid & liquid
D. neither solid nor liquid
Question 45
Which of the following is a copolymer ?
A. PVC
B. Bakelite
C. Polythene
D. Teflon
Question 46
Which of the following is generally not used as eord for synthetic rubber tyre casing ?
A. Dacron
B. Nylon
C. Cellulose
D. None of these
Question 47
Which of the following low molecular weight (<104 ), soft & waxy polymer is used in chewing gum ?
A. Cellulose acetate
B. Polyvinyl acetate
C. Thiokol
D. PVC
Question 48
Which of the following polymers belong to the class of formaldehyde resin ?
A. Melamine resins
B. Teflon
C. Dacron
D. None of these
Question 49
Which of the following polymers has the tendency of decomposing before melting ?
A. Polystyrene
B. Nylon
C. PVC
D. None of these
Question 50
Zeigler - Natta catalyst (AlR3 - AlCl3) is used in the polymerisation of
A. vinyl acetate
B. vinyl chloride
C. propylene
D. styrene
Question 51
Commercial production of polypropylene employs __________ polymerisation.
A. Emulsion
B. Suspension
C. Solution
D. Bulk
Question 52
Amino resins are used in paper treatment to improve its
A. Wet tear and bursting strength
B. Folding endurance
C. Wet rub resistance
D. All of the above
Question 53
Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to
A. Protect rubber goods from attack by oxygen & ozone present in the atmosphere
B. Reduce its viscosity to permit easier processing
C. Reduce the time of vulcanisation and quantity of vulcanising agent
D. Increase its viscosity
Question 54
Phenol formaldehyde
A. Employs addition polymerisation
B. Employs condensation polymerisation
C. Is a monomer
D. Is an abrasive material
Question 55
Phthalic anhydride is used
A. In making PVC
B. As plasticisers
C. In insecticides manufacture
D. For making nylon-6
Question 56
Pick out the wrong statement.
A. Polymeric fibres are never produced by addition polymerisation
B. Property of tackiness is exhibited by uncured rubber
C. Sharp melting point is not observed in thermoplastic polymers
D. Polythene generally has an excellent resistance to ultra violet rays
Question 57
Polycaprolactum is
A. Nylon-6
B. Nylon-66
C. Dacron
D. Rayon
Question 58
Polycaprolactum is nothing but
A. Orlon
B. Nylon 6, 6
C. Nylon 6
D. Saran
Question 59
Cross linked polymers formed from bi-and trifuctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer __________ properties.
A. Thermoplastic
B. Thermosetting
C. Elastometric
D. Brittleness
Question 60
__________ is produced by polymerisation of chloroprene.
A. Thiokol (a polysulphide rubber)
B. Butyl rubber
C. Neoprene
D. Polyurathane rubber
Question 61
__________ of SBR is adversely affected, if more quantity of styrene is added to butadiene during its co-polymerisation to produce SBR.
A. Percent elongation
B. Resilience
C. Freezing point
D. Strength
Question 62
Polymers are
A. Micromolecules
B. Macromolecules
C. Sub-micromolecules
D. None of these
Question 63
Polythene is a/an
A. Addition polymerisation product
B. Condensation polymerisation product
C. Thermosetting material
D. None of these
Question 64
Polyvinyl alcohol is used as a
A. Cation/anion exchanger
B. Water soluble adhesive
C. Textile fibre
D. Non-sticky coating on frying pans
Question 65
Polyvinyl chloride (PVC)
A. Is produced by polycondensation reaction
B. Uses either emulsion or suspension polymerisation methods
C. Can be made thermosetting by adding a plasticiser
D. Softening temperature is 200°C
Question 66
Glyptal used in the manufacture of paints & lacquers is a __________ polymer.
A. Polyamide
B. Polystyrene
C. Polyester
D. Polyacrylonitrile
Question 67
Nylon 6, 10 which is used for bristles making is superior to nylon 6, 6 due to its lower water absorption capacity, is a/an
A. Polyester
B. Polyamide
C. Polyisoprene
D. Polystyrene
Question 68
__________ polymer is used for making unbreakable crockery.
A. Thermoplastic
B. Melamine
C. Addition
D. None of these
Question 69
Poly Vinyl chloride (PVC) is a __________ material.
A. Thermoplastic
B. Thermosetting
C. Fibrous
D. Chemically active
Question 70
Pick out the wrong statement regarding the solubility characteristics of high polymers.
A. Greater the degree of cross-linking in the polymer, lesser is its solubility
B. Polymers having more aliphatic character are more soluble in aliphatic solvents, while those polymers having more aromatic character are more soluble in aromatic solvents
C. Swelling tendency or solubility of polymers in a particular solvent decreases with increase in molecular weight of the solvent
D. High molecul ar weight polymers on dissolving gives solution of very low viscosity
Question 71
Rain coats are made of
A. Neoprene
B. PVC
C. Polyurathane
D. SBR
Question 72
Rayon is a __________ fibre.
A. Cellulosic
B. Polyamide
C. Polyester
D. Natural
Question 73
Phosphates (e.g., triceresyl, tributyl, tetrabutyl, tripheyl etc.) are added to polymers to act as
A. Hardeners
B. Anti-shrinkage agents
C. Plasticisers
D. Transparency improver
Question 74
In condensation polymerisation as compared to addition polymerisation
A. The monomers are unsaturated compounds
B. No co-product is lost
C. The monomers contain two functional groups
D. Generally only one monomer is involved
Question 75
Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800?
A. 50000
B. 51600
C. 49200
D. 50800
Question 76
Terylene is a/an
A. Addition polymer
B. Poly amide
C. Homopolymer
D. None of these
Question 77
Styrene butadiene rubber (SBR) is
A. A natural rubber
B. Another name of silicone rubber
C. A synthetic polymer
D. A synthetic monomer
Question 78
In nylon-6, the number 6 represents the total number of
A. Carbon atoms in the ring
B. Carbon atoms in the linear polymer chain
C. Nitrogen atoms in the ring
D. Hydrogen atoms in the ring
Question 79
Alkyd resin e.g., glyptal resin formed by phthalic anhydride and glycerene is not used
A. For surface coating of automobiles & air crafts
B. For fibre making
C. As plasticiser for PVC & nitrocellulose
D. For film forming materials
Question 80
Adipic acid is an intermediate in the manufacture of
A. Perspex
B. Nylon-66
C. Polystyrene
D. Bakelite
Question 81
Poly tetra flouro ethylene (PTFE) is known as
A. Dacron
B. Teflon
C. Bakelite
D. Celluloid
Question 82
The major constituent of laminate of safety glass, which holds the broken glass, pieces in their places during accident (and thus minimises the danger from flying glass fragments) is
A. Polyvinyl alcohol
B. Polyvinyl acetale
C. Polyvinyl butyral
D. PVC
Question 83
Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the
A. Electrical insulation purpose
B. Tanning of leather
C. Strengthening of plaster of paris
D. Decorative laminates
Question 84
Liners of bags are usually made of
A. Polythene
B. PVC
C. Polypropylene
D. Polyesters
Question 85
Styrene butadiene rubber is commercially manufactured by
A. Bulk polymerisation
B. Suspension polymerisation
C. Solution polymerisation
D. Emulsion polymerisation
Question 86
Styrene which is a monomer for the production of polystyrene, is commercially produced by the
A. Catalytic dehydrogenation of ethyl benzene
B. Dehydration of ethyl alcohol followed by hydrogenation
C. Reacting ethylene oxide with acetal-dehyde
D. Fermentation of starch
Question 87
Pick out the wrong statement.
A. For the manufacture of styrene, the major raw materials are benzene and ethylene
B. One inportant copolymer of styrene is SBR, which is widely used in the manufacture of automobile tyres
C. Manufacture of phenol by chloroben-zene-eaustic process involves. The chlorination of benzene, causticisation and hydrolysis
D. Phenol manufacture by chlorobenzene-caustic process is competitive even when low cost chlorine is not available
Question 88
Which of the following is not a condensation polymer?
A. Bakelite
B. Melamine polymer
C. Polymethylmethacrylate (PMMA)
D. None of these
Question 89
Bristles of tooth brushes are made of
A. Nylon-6
B. Nylon-66
C. Polystyrene
D. PVC
Question 90
Valcunisation of rubber decreases its
A. Tensile strength
B. Resistance to organic solvents
C. Tackiness
D. Working temperature range
Question 91
Silicone is a/an
A. Monomer
B. Inorganic polymer
C. Thermoplastic material
D. A natural polymer
Question 92
Alkyd resin can not be used for making
A. Plasticiser
B. Paint & varnish
C. Fibres
D. Film forming materials
Question 93
Which of the following polymers is used for making a non stick coating on frying pans?
A. Bakelite
B. Teflon
C. Perspex
D. PVC
Question 94
Synthetic rubber
A. Deforms, if stretched to double of its original dimension
B. Is brittle at low temperature
C. Is softer at higher temperature
D. Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases
Question 95
Which of the following is generally not used as eord for synthetic rubber tyre casing?
A. Dacron
B. Nylon
C. Cellulose
D. None of these
Question 96
Teflon is
A. Phenol formaldehyde
B. An inorganic polymer
C. Polytetra florouethylene (PTFE)
D. A monomer
Question 97
Terylene is
A. Same as dacron
B. A polyester
C. Both A & B
D. Neither A nor B
Question 98
Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces
A. Epoxy resin
B. Polyamide
C. Alkyd resin
D. Phenolic resin
Question 99
Which of the following is a copolymer?
A. PVC
B. Bakelite
C. Polythene
D. Teflon
Question 100
Which of the following is a copolymer?
A. Polystyrene
B. SBR
C. P.T.F.E.
D. Polypropylene
Question 101
In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer?
A. PTFE
B. Buna-S
C. PMMA
D. Polycaprolactum
Question 102
The main use of butadiene is
A. As a plasticiser for unsaturated polyester
B. In the manufacture of synthetic rubber
C. As an anti-skimming agent in paint
D. None of these
Question 103
Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is
A. Ni
B. V₂O₅
C. Fe
D. Aluminium triethyl combined with titanium tetrachloride
Question 104
Thermoplastic resins usually
A. Remain hard as long as they are hot
B. Can not be reclaimed from waste
C. Permanent setting resins
D. Less brittle than thermosetting resins
Question 105
Thermosetting materials
A. Are cross-linked molecules
B. Soften on application of heat
C. Are solvent soluble
D. None of these
Question 106
Pick out the wrong statement.
A. Addition polymers are generally formed by chain growth polymerisation
B. Condensation polymers are generally formed by step growth polymerisation
C. Teflon is formed by step growth polymerisation
D. Bakelite is formed by step growth polymerisation
Question 107
Thermosplastic materials
A. Do not soften on application of heat
B. Are heavily branched molecules
C. Are solvent insoluble
D. None of these
Question 108
__________ practically possess no elasticity.
A. Vulcanite or ebonite
B. Spandex fibre
C. Polysulphide rubber
D. Epoxy resin
Question 109
Nylon 6 as compared to nylon 6, 6 has lower
A. Abrasion resistance
B. Thermal stability
C. Adhesion to rubber
D. Hardness
Question 110
In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher
A. Densities
B. Melting point
C. Tensile strength
D. Hardness, rigidity & brittleness
Question 111
Branched chain polymers compared to linear polymers have higher
A. Density
B. Tensile strength
C. Melting point
D. Degree of irregularity in atomic packing
Question 112
The rate controlling step in the manufacture of silicone rubber is the
A. Polymer termination step
B. Condensation of siloxane to silicone
C. Initial hydrolysis of silicone monomer
D. None of these
Question 113
Tyres are made by
A. Injection moulding
B. Extrusion
C. Rotational moulding
D. Compression moulding
Question 114
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?
A. Ammonium alum
B. Potassium alum
C. Both A & B
D. Neither A nor B
Question 115
Viscose rayon is
A. Cellulose nitrate
B. Regenerated cellulose nitrate
C. Regenerated cellulose acetate
D. None of these
Question 116
Vulcanisation of rubber
A. Decreases its tensile strength
B. Increases its ozone & oxygen reactivity
C. Increases its oil & solvent resistance
D. Converts its plasticity into elasticity
Question 117
Which of the following is an inorganic polymer?
A. Teflon
B. Perspex
C. Silicones
D. Bakelite
Question 118
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
Question 119
Low density polythene as compared to high density polythene is
A. Harder
B. Tougher
C. Chemically inert
D. More flexible
Question 120
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
Question 121
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
Question 122
__________ 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
Question 123
Collapsible tubes for tooth paste are produced by __________ extrusion.
A. Direct
B. Indirect
C. Impact
D. None of these
Question 124
Nitrile rubber is produced by the polymerisation of
A. Acrylonitrile & butadiene
B. Acrylonitrile & styrene
C. Isobutylene & isoprene
D. None of these
Question 125
Cellulose content in bomboo fibre is about __________ percent.
A. 10
B. 20
C. 50
D. 85
Question 126
Buna-N is also called
A. Butyl rubber
B. Nitrile rubber
C. Neoprene
D. Thiokol
Question 127
__________ is a copolymer.
A. Nylon-66
B. Polyrophylene
C. PVC
D. Poly tetra flouro ethylene
Question 128
The conversion of caprolactum in the above case is about __________ percent.
A. 25
B. 50
C. 70
D. 90
Question 129
Polymethyl methacrylate (PMMA) which is also known as perspex and is produced by bulk polymerisation of methyl methacrylate is not a __________ polymer.
A. Thermoplastic
B. Thermosetting
C. Linear
D. Glass like transparent
Question 130
The monomer of natural rubber is
A. DMT
B. Isoprene
C. 2 methyl-1-propene
D. Both B and C
Question 131
Polyesters are manufactured by the polycondensation reaction of
A. Dibasic acid with dihydric alcohol
B. A single monomer
C. Carboxylic acid with ethylene
D. Inorganic acid with ethylene glycol
Question 132
Which of the following has the weakest intermolecular forces?
A. Polyisoprene
B. Nylon-66
C. Polystyrene
D. Bakelite
Question 133
Silicone resins, which are highly water repellant and has good heat resistance can not be used
A. As room temperature adhesive
B. As grease & lubricant
C. Hydraulic fluid for heat transfer
D. Resin for lamination
Question 134
Ebonite is a/an
A. Highly vulcanised rubber
B. Natural rubber
C. Unvulcanised raw rubber
D. Adhesive
Question 135
Identify the group in which all the polymers mentioned can be used to make fibres.
A. Butadiene copolymers, Polyamides, Urea aldehyde
B. Cellulose derivatives, Polyisoprene, Polyethylene
C. Cellulose derivatives, Polyamides, Polyurathane
D. Polypropylene, Poly vinyl chloride, Silicon
Question 136
Acrylonitrile is mainly used in the __________ industry.
A. Polymer
B. Printing
C. Dyeing
D. Photographic
Question 137
Neoprene is rendered non-inflammable, because of
A. Its cross-linked structure
B. Its linear chain structure
C. The presence of chlorine atoms in its monomer
D. The absence of chlorine atoms in its monomer
Question 138
Molecular weights of plastics ranges from
A. 1000 to 5000
B. 5000 to 1000
C. 20000 to 25000
D. 10⁹ to l0¹¹
Question 139
Elastomers are
A. Thermosetting material
B. Exemplified by protein derivatives
C. Having high flexural strength
D. Having very high tensile strength and heat resistance
Question 140
Non sulphonated hard bakelites are not used for making
A. Ion-exchange resins
B. Fountain pen barrels
C. Formica table tops
D. Combs
Question 141
Polyhexamethylene adipimide is also known as
A. Bakelite
B. Nylon-66
C. Epoxy resin
D. Silicone rubber
Question 142
Polymerisation process in which two or more monomers of chemically different nature take part is called
A. Copolymerisation
B. Addition polymerisation
C. Chain polymerisation
D. None of these
Question 143
Cation exchange resins (0.3 to 1 mm size) used in water treatment is prepared from __________ resins.
A. Epoxy
B. Phenol formaldehyde
C. Urea formaldehyde
D. Melamine formaldehyde
Question 144
Epoxy resin is
A. Not used for surface coating
B. A good abrasive
C. An elastomer
D. A polyester
Question 145
Which of the following rubbers has the widest service temperature range (-75 to 275°C) ?
A. Butyl rubber
B. Silicon rubber
C. Nitrile rubber
D. Silicone rubber
Question 146
Phenol formaldehyde is produced by condensation polymerisation. It is also known as
A. Teflon
B. Bakelite
C. Polyester
D. Nylon-66
Question 147
Condensation polymerisation of formaldehyde with __________ does not produce phenolic resin.
A. Resorcinol
B. Phenol
C. Para-cresol
D. Melamine
Question 148
Epoxy resins (i.e., epoxide polymers)
A. Are made by addition polymerisation reaction only
B. Contain an epoxy group ( ##### ) at the ends of the polymer
C. Are cross-linked polymers only
D. Use emulsion polymerisation methods
Question 149
Condensation of bisphenol A with phosgene produces __________ which possess very good heat resistance.
A. Polyurathane
B. Polysulphone
C. Polycarbonate
D. Polyester
Question 150
Polyvinyl acetate is never used for making
A. Moulded articles
B. Fibres
C. Adhesives
D. All of the above
Question 151
Properties of a polymer is affected by the
A. Chain length
B. Intermolecular forces
C. Branching & cross-linking
D. All of the above
Question 152
Which of the following polymers has the tendency of decomposing before melting?
A. Polystyrene
B. Nylon
C. PVC
D. None of these
Question 153
Thermal pyrolysis of ethylene dichloride produces
A. Trichlorethylene
B. Vinyl chloride
C. Ethanol amine
D. Ethylene oxide
Question 154
Molecular weight of polymers are in the range of
A. 10 to 10³
B. 10²-10⁷
C. 10⁷-10⁹
D. 10⁹-10¹¹
Question 155
Vulcanisation of rubber does not increase its
A. Elasticity
B. Plasticity
C. Ductility
D. None of these
Question 156
__________ fibres are made of polyamides.
A. Dacron
B. Nylon
C. Rayon
D. Orion
Question 157
Gutta parcha rubber is
A. Soft & tacky at room temperature
B. An isomer of natural rubber
C. A thermosetting resin
D. Recovered by coagulation of rubber latex
Question 158
Which of the following is an elastomer?
A. Thiokol
B. Phenol formaldehyde
C. Urea formaldehyde
D. Polystyrene
Question 159
The repeating units of PTFE are
A. Cl₂CH = CH₃
B. F₂ C = CF₂
C. F₃ C = CF₃
D. FClC = CF₂
Question 160
Thermosetting plastic materials
A. Can be repeatedly melted
B. Is useful for melt casting
C. Can not be melted after forming
D. Is useful for spinning
Question 161
Which of the following polymers shows the highest anti-tacking properties?
A. Melamine formaldehyde resin
B. Phenolic resin
C. Epoxy resin
D. Alkyd resin
Question 162
Bakelite (phenol-formaldehyde) resin can not be used as
A. Decorative paint
B. Decorative laminates
C. Electrical insulation
D. Glass reinforced plastics
Question 163
Flexible plastic pipes are made of
A. High density polyethylene (HDPE)
B. Low density polyethylene (LDPE)
C. Polypropylene
D. Unsaturated polyester
Question 164
Synthetic polymer produced by using terephthalic acid and ethylene glycol is
A. Terylene
B. Nylon-66
C. PVC
D. Polyesterene
Question 165
Paper like thin plastic articles can be produced by
A. Blow moulding
B. Vacuum thermo forming
C. Injection moulding
D. None of these
Question 166
Pick out the correct statement.
A. Plastics are good conductors of heat and electricity
B. All the polymers are highly crystalline in nature
C. Polymers can be vaporised by heating to a very high temperature
D. The liquid polymer becomes greasy, then waxy and finally solid on increasing the degree of polymerisation
Question 167
Which of the following is not a natural polymer?
A. Nucleic acids e.g. RNA and DNA
B. Polysaccharides
C. Polyisoprene
D. Polyurethane
Question 168
Which of the following is stretched into fibres?
A. Saturated polyester
B. Unsaturated polyester
C. Isoprene
D. Bakelite
Question 169
Addition of stabiliser during PVC manufacture is done to
A. Improve its impact strength
B. Improve its elasticity
C. Reduce the melt viscosity & glass transition temperature
D. Prevent its thermal degradation
Question 170
Addition polymerisation is not involved in the manufacture of
A. Low density polythene
B. Poly vinyl chloride
C. Polystyrene
D. Polyhexamethylene adipamide
Question 171
Condensation polymerisation is not involved in the manufacture of
A. Teflon
B. Polythene
C. Terylene
D. Nylon
Question 172
In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of
A. Cross linked polystyrene
B. Phenol formaldehyde resins
C. Polyesters
D. Polyamides
Question 173
A chain growth polymerisation reaction consists of three different types of reaction namely initiation reaction, propagation reaction & termination reaction. Chain growth polymerisation reaction is not involved in the manufacture of
A. Siloxane elastomers
B. Polyamides
C. Vinyl polymers
D. Urea-formaldehyde resins
Question 174
Polycondensation reaction of polymerisation
A. Does not produce linear polymers
B. Produces only thermoplastic material
C. Produces epoxy polymers
D. Does not need any catalyst
Question 175
The only natural thermoplastic resin, which is a product of animal life is
A. Rosin
B. Shellac
C. Amber
D. Copal
Question 176
Cation exchange resins used in water treatment is made from __________ resin.
A. Urea formaldehyde
B. Epoxy
C. Amino
D. Phenolic
Question 177
Vulcanisation of rubber does not increase its
A. Softness
B. Oxidation resistance
C. Weight & strength
D. Elasticity & water solubility
Question 178
__________ is not a condensation polymer.
A. Teflon
B. Nylon-66
C. Dacron
D. Polystyrene
Question 179
Condensation polymerisation of __________ produces bakelite.
A. Propylene
B. Phenol & formaldehyde
C. Phenol & acetaldehyde
D. Urea & formaldehyde
Question 180
Polymethyl methacrylate, which is an acrylic resin, is also called
A. Thiokol
B. Plexiglass or lucite
C. Dacron
D. Teflon
Question 181
Scouring is a finishing operation during the manufacture of fibre, which aims at __________ of fibres.
A. Improving the stretchability
B. Dyeing/colouring
C. Detergent solution washing
D. Glycol soaking
Question 182
__________ scrap can be recycled & reutilised.
A. Bakelite
B. Epoxy resin
C. Polythene
D. None of these
Question 183
Which of the following polymers belong to the class of formaldehyde resin?
A. Melamine resins
B. Teflon
C. Dacron
D. None of these
Question 184
Dacron (or terylene) fibres as compared to nylon fibres have
A. Better heat & acid resistant properties
B. Poorer resistance to alkalis
C. Poorer dyeability
D. All of the above
Question 185
Maximum consumption of polymers is in
A. Electrical insulation
B. Toys making
C. Coating and films
D. Packaging
Question 186
All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it can not be used for the production of plastic
A. Filaments
B. Pipes
C. Buckets
D. Tubings
Question 187
Which of the following is a natural polyamide fibre.
A. Wool
B. Silk
C. Cotton
D. None of these
Question 188
The starting material used for the manufacture of caprolactum is
A. Ethyl benzene
B. Cyclohexane
C. Ethylene glycol
D. DMT
Question 189
__________ polythene is most prone to stress-cracking
A. High density
B. Low density
C. Cross-linked
D. Linear low density
Question 190
Viscosity of a polymer solution or melt
A. Decreases with increase in molecular weight
B. Decreases with increase in temperature
C. Increases with increase in temperature
D. Does not vary with temperature rise
Question 191
Contact lenses for eyes are made of perspex, which is nothing but
A. Polymethylmethacrylate
B. Polystyrene
C. Unsaturated polyester
D. Polypropylene
Question 192
Most commonly used rubber vulcanisation agent is
A. Sulphur
B. Bromine
C. Platinum
D. Alumina
Question 193
Hot drink (e.g, tea) cups are usually made of
A. Polystyrene
B. Polythene
C. Polypropylene
D. PVC
Question 194
90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of __________ °C.
A. -5
B. 10-30
C. 250-280
D. 500-600
Question 195
Most of the plastics are safe to be used upto a maximum temperature of __________ °C.
A. 100
B. 150
C. 350
D. 450
Question 196
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
Question 197
Main constituent of cotton fibre is
A. Lignin
B. Cellulose
C. Starch
D. Gelatine
Question 198
Cross linked polymers are
A. Thermoplastic
B. Thermosetting
C. Either A or B
D. Fibres only
Question 199
Starting material for the production of butadiene in India is
A. Naphthalene
B. Benzol
C. Ethyl alcohol
D. Phthalic anhydride
Question 200
Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about __________ ° C.
A. -20
B. 50
C. 250
D. 500
Question 201
A copolymer is formed by the combination of two or more monomer molecules
A. In a chain without the elimination of water
B. With the elimination of small amount of water
C. Of the same monomer by elimination of small molecules of water
D. None of these
Question 202
Orlan fibre which is used as a wool sub stitute is
A. An amorphous polymer
B. A natural polymeric fibre
C. Polyacrylonitrile
D. Polymethylmethacrylate (PMMA)
Question 203
Zeigler - Natta catalyst (AlR₃ - AlCl₃) is used in the polymerisation of
A. Vinyl acetate
B. Vinyl chloride
C. Propylene
D. Styrene
Question 204
Size range of polymer molecules varies from __________ metre.
A. 10⁻² to 10⁻⁵
B. 10⁻⁴ to 10⁻⁷
C. 10⁻¹ to 10⁻²
D. 10⁻⁸ to 10⁻¹⁰
Question 205
__________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate.
A. Fibrous
B. Leathery
C. Rubbery
D. Hard
Question 206
A copolymer of vinyl and vinylidine chloride is called
A. Treylene
B. Orlon
C. Saran
D. Dacron
Question 207
Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature.
A. Nylon
B. Polyacrylonitrile
C. Polypropylene
D. Polyester
Question 208
Which of the following is the most important rubber compounding ingradient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness?
A. Phosphorous
B. Carbon black
C. Pine oil
D. Rosin
Question 209
Styrene butadiene rubber (SBR) is never used for making
A. Coated fabrics
B. Front wheel tyres of aeroplanes (i.e., heavy duty tyres)
C. Gaskets
D. Soles of shoes
Question 210
Temperature and gage pressure maintained during the manufacture of cold SBR (styrene butadiene rubber) are
A. 5°C and 1 kgf/cm²
B. - 20°C and 1 kgf/cm²
C. 0°C and 1 kgf/cm²
D. 0°C and 3 kgf/cm²
Question 211
Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butediene rubber) are
A. 50°C and 3 - 4 kg/cm²
B. 50°C and 1 kgf/cm²
C. 250°C and 10 kgf/cm²
D. 250°C and 1 kgf/cm²
Question 212
Polystyrene is a __________ plastic at room temperature.
A. Ductile
B. Brittle
C. Malleable
D. None of these
Question 213
__________ is a thermosetting plastic.
A. PVC
B. Polythene
C. Bakelite
D. Polystyrene
Question 214
Condensation polymerisation of caprolac-tum is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6.
A. -20 to 25
B. 50 to 75
C. 100 to 150
D. 250-280
Question 215
__________ is an addition polymer
A. Nylon
B. Bakelite
C. Polythene
D. None of these
Question 216
__________ is a natural fibre.
A. Cellulose
B. Dacron
C. Nylon-6
D. None of these
Question 217
Plasticisers are added to synthetic plastics to
A. Impart flexibility
B. Improve workability during fabrication
C. Develop new improved properties not present in the original resin
D. All of the above
Question 218
Plexiglass (also called lucite) because of its high optical transparency is used for making lenses. It is chemically
A. Polymethyl methacrylate (PMMA)
B. Polytetraflouroethylene(PTFE)
C. Polycarbonates
D. Phenolic resins
Question 219
Alkyd resin is a/an
A. Polyamide
B. Polyester
C. Polyolefin
D. Addition polymer
Question 220
SBR is produced by the copolymerisation of butadiene & styrene by employing emulsion polymerisation. The weight ratio of styrene and butadiene is maintained at
A. 1:3
B. 3:1
C. 1:2
D. 2:1
Question 221
Polymers are classified into four categories namely thermosetting, thermoplastic, elastomer and fibre depending upon their
A. Molecular sizes
B. Magnitude of intermolecular forces
C. Resistance to heat
D. Polymerisation mechanism
Question 222
Polyurathane can not be used for making
A. Mattresses & foam
B. Coating material
C. Adhesives
D. Bottles
Question 223
Thermosetting resins/polymers as compared to thermoplastic ones are
A. Soluble in all organic solvents
B. More brittle
C. Formed by addition polymerisation only
D. Easily reshaped & reused
Question 224
Thermosetting polymers as compared to thermoplastic polymers
A. Are formed by addition polymerisation
B. Have three dimensional structure
C. Have linear structure
D. None of these
Question 225
Which of the following is the lowest cost plastic commercially available?
A. Polythene
B. Teflon
C. Bakelite
D. PVC
Question 226
Polystyrene is a light, transparent, thermoplastic material used for making
A. Toys and combs
B. Packaging bags
C. Non-sticking utensils
D. Electrical insulation
Question 227
The physical state in which polymers exist is
A. Melts & rubber like state
B. Amorphous glassy state
C. Partially crystalline state
D. All of the above
Question 228
Polyurathane can not be used to make
A. Automobile cushion
B. Thermal insulation in refrigerator
C. Coating and adhesive
D. Fibre reinforced plastic (FRP)
Question 229
Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m². Which of the following polymers has the maximum film elongation (of the order of 100%) ?
A. Water impermeable cellophane
B. Polythene
C. Cellulose acetate
D. Teflon
Question 230
Flexible foam (for mattresses) are usually made of
A. PVC
B. Silicone rubber
C. Polyurethanes
D. Polyamides
Question 231
Bakelite is
A. Same as polytetra flouro ethylene (PTFE)
B. An inorganic polymer
C. Same as thermoset phenol formaldehyde
D. Not a polymer
Question 232
Bakelite is a/an
A. Addition polymer
B. Elastomer
C. Thermoplastic
D. None of these
Question 233
Thermocole is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten
A. Saturated polyester
B. Polyurathane
C. Polystyrene
D. Either B or C
Question 234
Buna-S is also called
A. Polyurathane
B. SBR
C. Teflon
D. Bakelite
Question 235
In case of wet spinning of polymers, the polymer solution is forced through spinnerates into, a coagulating bath to give a filament form. Wet spinning is not used in case of the __________ fibres.
A. Viscose rayon
B. Acrylic
C. Polyvinyl acetate
D. Saturated polyester
Question 236
__________ is a homopolymer.
A. Neoprene
B. Bakelite
C. Nylon-66
D. Terylene
Question 237
Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.
A. Acrylic
B. Polyester
C. Nylon 6:6
D. Polypropylene
Question 238
Benzoyl chloride is not used as a catalyst in the manufacture of
A. Polystyrene
B. Polyvinyl acetate
C. Polypropylene
D. Polyvinyl chloride-co-vinylacetate
Question 239
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
Question 240
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
Question 241
The major component of acrylic fibres is
A. Polyamides
B. Polyolefins
C. Polyacrylonitrile
D. Polyesters
Question 242
Rayon is superior to cotton in making gauge for wound treatment, because rayon
A. Is a synthetic polymer
B. Does not stick to the wound unlike cotton
C. Can absorb over 90% of its own weight of water
D. Both B & C
Question 243
Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is
A. Nylon-66
B. Teflon
C. Polyester
D. Bakelite
Question 244
Plastic tubes & pipes are generally made by __________ moulding.
A. Injection
B. Transfer
C. Extrusion
D. Compression
Question 245
Polypropylene compared to polythene is
A. Harder
B. Stronger
C. Lighter
D. All of the above
Question 246
Acrilan fibres used for making cloth, carpet & blankets, which is a hard, horny & high melting polymeric material is nothing but
A. Polyacrylonitrile
B. Polyamide
C. Saturated polyester
D. Alkyd resin
Question 247
Softening point of high density polythene is about __________ °C.
A. 85
B. 135
C. 165
D. 205
Question 248
Zeigler process
A. Produces high density polythene
B. Uses no catalyst
C. Produces low density polythene
D. Employs very high pressure
Question 249
Pick out the wrong statement.
A. Polystyrene is a thermoplastic polymer
B. Protein is a natural polymer
C. Neoprene is a natural rubber
D. Polythene is a copolymer, while SBR is a homopolymer
Question 250
β - glucose is the monomer of
A. Cellulose
B. Starch
C. Protein
D. None of these
Question 251
In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for __________ fibres.
A. Polythene
B. PVC
C. Rayon
D. Polyvinyl acetate
Question 252
Vulcanisation of raw rubber makes it
A. Soft
B. Less elastic
C. Plastic
D. Tacky
Question 253
Which of the following polymers are produced by employing all bulk polymerisation, solution polymerisation & suspension polymerisation technique of addition (chain) polymerisation?
A. PVC
B. Bakelite
C. PTFE
D. Epoxy resin
Question 254
Perspex can be used as a substitute of glass. Its monomer is
A. Methyl methacrylate
B. DMT
C. Butadiene
D. Tetrafluroethylene
Question 255
Starting material for the production of SBR is
A. Ethyl alcohol
B. Ethylene
C. Both A & B
D. Neither A nor B
Question 256
Which of the following polymers does not belong to the class of polyacrylate polymer?
A. PMMA
B. Polyacrylonitrile
C. Polyethyl acrylate
D. None of these
Question 257
Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its
A. Tensile strength
B. Chemical resistance
C. Flexibility
D. All of the above
Question 258
Which of the following is a polymer of hexamethylene diamine and adipic acid?
A. Nylon-6
B. Nylon-66
C. Nylon-6, 10
D. Epoxy resin
Question 259
Linear polymers are normally
A. Thermosetting
B. Thermosplastic
C. Elastometric
D. Having extremely high softening point
Question 260
Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser?
A. Ethylene glycol
B. Stearic acid estors
C. Tricresyl phosphate
D. Esters of phthalic acid
Question 261
Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding
A. Glycerol
B. Nitro cellulose
C. Camphor
D. None of these
Question 262
Nylon-66 compared to nylon-6 has
A. Lower melting point
B. More abrasion resistant properties
C. Higher hardness
D. All of the above
Question 263
Which of the following is not a natural fibre?
A. Silk
B. Viscose rayon
C. Wool
D. Cotton
Question 264
Polycaprolactum is also known as
A. Nylon-66
B. Nylon-6
C. Teflon
D. SBR
Question 265
Which of the following low molecular weight (<10⁴ ), soft & waxy polymer is used in chewing gum?
A. Cellulose acetate
B. Polyvinyl acetate
C. Thiokol
D. PVC
Question 266
Polypropylene is preferred to polythene, because the former is
A. Non-inflammable
B. Harder
C. Stronger
D. Both B & C
Question 267
Polycaprolactum (Nylon - 6) is produced by the condensation polymerisation of caprolactum at 240-280°C in which the conversion of caprolactum is about __________ percent.
A. 50
B. 75
C. 90
D. 99
Question 268
Unbreakable crockeries are made from __________ polymers.
A. Polystyrene
B. Melamine
C. Polystyrene
D. Polyurathane
Question 269
Which of the following additives are added to plastics to make it impervious to X-rays?
A. Asbestos
B. Barium salt
C. Carborundum
D. Phthalic acid
Question 270
Mastication of rubber means
A. Its softening
B. A treatment to retard its deterioration due to oxidation
C. Improving its curing rate
D. Depression of its freezing point
Question 271
Branched chair polymers as compared to linear polymers have
A. Higher melting point
B. Higher tensile strength
C. Lower density
D. None of these
Question 272
__________ is normally used for the manufacture of refrigerator components and transistor parts.
A. Polyproylene
B. Polystyrene
C. Polyester
D. Polyurathene
Question 273
Pick out the wrong statement.
A. Linear polymers are formed from bifunctional groups only and are normally thermoplastic
B. Cross-linked branched chain polymers are either elastometric or thermosetting
C. Branching in case of cross-linked polymers caused by small amount of impurities in bifunctional monomer formulation reduces its solubility and increases the softening point
D. Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction
Question 274
Antioxidants are added to rubber to protect it from the attack of light, heat & atmospheric ozone. Which of the following is an antioxident used in rubber?
A. Carbon
B. Alkylated diphenyl amine
C. Thiokol
D. Magnesium
Question 275
Nylon-6 as compared to nylon-66 is
A. Harder
B. More abrasion resistant
C. Having higher melting point
D. None of these
Question 276
Density of low density polythene is about __________ gm/c.c.
A. 0.38
B. 0.56
C. 0.81
D. 0.91
Question 277
Which of the following is generally not drawn into fibre?
A. Polyamide
B. Unsaturated polyesters
C. Saturated polyesters
D. Polyacrylonitrile
Question 278
In a cross linked polymer, the monomeric units are linked together to constitute a three dimensional network. Which of the following is a cross-linked polymer?
A. Bakelite (phenol formaldehyde)
B. Polyester
C. Polythene
D. Nylon-6
Question 279
Which of the following is not a thermoplastic material?
A. Epoxy polymer
B. PVC
C. Polystyrene
D. Polythene
Question 280
Which of the following is not present in bagasse fibre?
A. Cellulose
B. Lignin
C. Pentogens
D. None of these
Question 281
Main constituent of natural rubber is
A. Polystyrene
B. Polyisoprene
C. Polybutadiene
D. Poly chloroprene
Question 282
Diphenylamine is added to rubber to
A. Valcanise it
B. Protect it from deterioration on exposure to air
C. Make it non-inflammable
D. Make it thermosetting
Question 283
Nylon-6 is a
A. Polyamide
B. Thermosetting resin
C. Polyester
D. None of these
Question 284
Nylon-6 is manufactured from
A. Caprolactum
B. Adipic acid and hexamethylene diamine
C. Maleic anhydride and hexamethylene diamine
D. Sebasic acid and hexamethylene diamine
Question 285
The inter particle forces between linear chains in nylon-66 are __________ bonds.
A. Hydrogen
B. Covalant
C. Ionic
D. None of these
Question 286
Nylon-66 is a polyamide of
A. Hexamethylene diamine and adipic acid
B. Adipic acid and methyl amine
C. Vinyl chloride and formaldeyde
D. None of these
Question 287
Pick out the wrong statement.
A. Cold SBR is superior as compared to hot SBR
B. Polymerisation temperature can modify the properties of SBR
C. Production of cold SBR employs lower pressure as compared to that of hot SBR
D. None of these
Question 288
Nylon-66 is manufactured from
A. Adipic acid and hexamenthylene diamine
B. Caprolactum
C. Maleic anhydride and hexamethylene diamine
D. Dimethyl terephthalate (DMT) and ethylene glycol
Question 289
Polymerisation product of C₂F₄ (carbon tetraflouride) is called P.T.F.E. (poly chloro tetra flouro ethylene). It is also called
A. Polyurethane
B. Silicone rubber
C. Teflon
D. Epoxy resin
Question 290
Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is
A. 7 kgf/cm² and 70 °C
B. 1000 kgf/cm² and 100°C
C. 7 kgf/cm² and 700°C
D. 1 kgf/cm² (gage) and 70°C
Question 291
Rexin (also called artificial leather), which is used for making table cover, automobile seat cover, shoes etc. is made by coating thick cloth with molten
A. Teflon
B. Bakelite
C. SBR
D. PVC
Question 292
Polymerisation of poly functional monomers produces polymers having
A. Good machanical strength
B. Low viscosity
C. Low melting point
D. None of these
Question 293
Low pressure Zeigler process of polythene manufacture
A. Employs a pressure of 30 kgf/cm²
B. Achieves an yield of 95-98% based on ethylene
C. Produces very low density polythene
D. Does not use any catalyst for polymerisation
Question 294
The generic chemical name for the class of polymers which are commerically known as nylons is
A. Polyolefins
B. Polyamide
C. Polyacrylate
D. Polyurathane
Question 295
Plastic articles are normally produced by __________ moulding.
A. Green sand
B. Injection
C. Shell
D. Dry sand
Question 296
Pickout the wrong statement.
A. Polymers made of only one monomer is called homopolymer
B. Polymers made of more than one monomer is called copolymer or mixed polymer
C. Vulcanised rubber is more elastic than natural rubber
D. The intermoleculer forces in ther-mosplastic polymers are intermediate to that of elastomers & fibres
Question 297
Polyvinyl chloride (PVC) is
A. A thermosetting material
B. A condensation polymerisation product
C. Made by employing emulsion polymerisation
D. None of these
Question 298
The monomer for the production of neoprene rubber is
A. Acetylene
B. Chloroprene
C. Isoprene
D. None of these
Question 299
Ion exchange resins are made of
A. Lucite
B. Sulphonated bakelite
C. Polystyrene
D. Teflon
Question 300
Which of the following types of polymers has the strongest inter particle forces?
A. Elastomers
B. Fibres
C. Thermoplastics
D. Thermosetting polymers
Question 301
In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the
A. Hexamethylene diamine and the ring
B. Hexamethylene diamine and the adipic acid
C. Adipic acid and the ring
D. None of these
Question 302
Pick out the wrong statement.
A. Denier is defined as weight in gm of 9000 metres length of a fibre, while tex is defined as weight in gm of 1000 metres length of fibre
B. Crimp is a measure of the difference between the length of the straightened and unstraightend fibre
C. Dacron fibres, acrylic fibres, viscose rayon fibres & cellulose acetate fibres are all prepared by wet spinning
D. Nylon fibres have greater water absorption capacity than polyester fibres
Question 303
Which of the following is not a polyolefin?
A. Polystyrene
B. Polypropylene
C. Neoprene
D. None of these
Question 304
Orion is
A. A copolymer
B. A condensation polymer
C. Obtained by polymerising vinyl cyanide
D. All of the above
Question 305
Which of the following is not an elastomer?
A. Polyisoprene
B. Neoprene
C. Nitrile-butadiene
D. None of these
Question 306
__________ moulding is used for shaping of thermosetting plastics exclusively.
A. Compression
B. Injection
C. Transfer
D. Extrusion
Question 307
Which of the following natural bio polymers are formed as a result of polymerisation of amino-acids?
A. Starch
B. Cellulose
C. Proteins
D. Nucleic acids
Question 308
Which of the following is not a polymer of two monomers?
A. Teflon
B. Bakelite
C. SBR
D. None of these
Question 309
Catalyst used in the production of high density polythene by low pressure Ziegler process is
A. Aluminium triethyl activated with TiCl₄
B. Platinum
C. Molybdenum
D. Nickel
Question 310
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
A. Terylene
B. Polybutadiene
C. PVC
D. Polypropylene