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Polymer Technology MCQ Questions & Answers

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

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)

View Answer

Question 2

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

View Answer

Question 3

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

View Answer

Question 4

Nylon 6 as compared to nylon 6, 6 has lower

A. Abrasion resistance
B. Thermal stability
C. Adhesion to rubber
D. Hardness

View Answer

Question 5

Molecular weight of polymers are in the range of

A. 10 to 10³
B. 10²-10⁷
C. 10⁷-10⁹
D. 10⁹-10¹¹

View Answer

Question 6

Which of the following is not a natural polymer?

A. Nucleic acids e.g. RNA and DNA
B. Polysaccharides
C. Polyisoprene
D. Polyurethane

View Answer

Question 7

Epoxy resin is

A. Not used for surface coating
B. A good abrasive
C. An elastomer
D. A polyester

View Answer

Question 8

Addition polymerisation is not involved in the manufacture of

A. Low density polythene
B. Poly vinyl chloride
C. Polystyrene
D. Polyhexamethylene adipamide

View Answer

Question 9

Cross linked polymers are

A. Thermoplastic
B. Thermosetting
C. Either A or B
D. Fibres only

View Answer

Question 10

Valcunisation of rubber decreases its

A. Tensile strength
B. Resistance to organic solvents
C. Tackiness
D. Working temperature range

View Answer

Question 11

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

View Answer

Question 12

__________ polythene is most prone to stress-cracking

A. High density
B. Low density
C. Cross-linked
D. Linear low density

View Answer

Question 13

Polystyrene is a light, transparent, thermoplastic material used for making

A. Toys and combs
B. Packaging bags
C. Non-sticking utensils
D. Electrical insulation

View Answer

Question 14

__________ tubes are good substitude for human blood vessels onrheart by-pass operation.

A. PVC
B. Polythene
C. Teflon/dacron
D. Polystyrene

View Answer

Question 15

Starting material for the production of butadiene in India is

A. Naphthalene
B. Benzol
C. Ethyl alcohol
D. Phthalic anhydride

View Answer

Question 16

The major component of acrylic fibres is

A. Polyamides
B. Polyolefins
C. Polyacrylonitrile
D. Polyesters

View Answer

Question 17

The inter particle forces between linear chains in nylon-66 are __________ bonds.

A. Hydrogen
B. Covalant
C. Ionic
D. None of these

View Answer

Question 18

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

View Answer

Question 19

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

View Answer

Question 20

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

View Answer

Question 21

Polycaprolactum is also known as

A. Nylon-66
B. Nylon-6
C. Teflon
D. SBR

View Answer

Question 22

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

View Answer

Question 23

Which of the following is an inorganic polymer?

A. Teflon
B. Perspex
C. Silicones
D. Bakelite

View Answer

Question 24

Which of the following polymers has the tendency of decomposing before melting?

A. Polystyrene
B. Nylon
C. PVC
D. None of these

View Answer

Question 25

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

View Answer

Question 26

__________ is not a condensation polymer.

A. Teflon
B. Nylon-66
C. Dacron
D. Polystyrene

View Answer

Question 27

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

View Answer

Question 28

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

View Answer

Question 29

Viscose rayon is

A. Cellulose nitrate
B. Regenerated cellulose nitrate
C. Regenerated cellulose acetate
D. None of these

View Answer

Question 30

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

View Answer

Question 31

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

View Answer

Question 32

Polymers are

A. Micromolecules
B. Macromolecules
C. Sub-micromolecules
D. None of these

View Answer

Question 33

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

View Answer

Question 34

__________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine.

A. Epoxy
B. Amino
C. Alkyd
D. Phenolic

View Answer

Question 35

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

View Answer

Question 36

Rain coats are made of

A. Neoprene
B. PVC
C. Polyurathane
D. SBR

View Answer

Question 37

Most commonly used rubber vulcanisation agent is

A. Sulphur
B. Bromine
C. Platinum
D. Alumina

View Answer

Question 38

Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about __________ ° C.

A. -20
B. 50
C. 250
D. 500

View Answer

Question 39

The only natural thermoplastic resin, which is a product of animal life is

A. Rosin
B. Shellac
C. Amber
D. Copal

View Answer

Question 40

Acrylonitrile is mainly used in the __________ industry.

A. Polymer
B. Printing
C. Dyeing
D. Photographic

View Answer

Question 41

Molecular weights of plastics ranges from

A. 1000 to 5000
B. 5000 to 1000
C. 20000 to 25000
D. 10⁹ to l0¹¹

View Answer

Question 42

__________ is normally used for the manufacture of refrigerator components and transistor parts.

A. Polyproylene
B. Polystyrene
C. Polyester
D. Polyurathene

View Answer

Question 43

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

View Answer

Question 44

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

View Answer

Question 45

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

View Answer

Question 46

The monomer of poly vinyl chloride (PVC) is

A. chloroethene
B. ethylene dichloride
C. ethyl chloride
D. chloroform

View Answer

Question 47

Which of the following is not an elastomer?

A. Polyisoprene
B. Neoprene
C. Nitrile-butadiene
D. None of these

View Answer

Question 48

Collapsible tubes for tooth paste are produced by __________ extrusion.

A. Direct
B. Indirect
C. Impact
D. None of these

View Answer

Question 49

Terylene is a/an

A. Addition polymer
B. Poly amide
C. Homopolymer
D. None of these

View Answer

Question 50

Polyurathane can not be used to make

A. Automobile cushion
B. Thermal insulation in refrigerator
C. Coating and adhesive
D. Fibre reinforced plastic (FRP)

View Answer

Question 51

Thiokol is nothing but

A. polysulphide rubber
B. polyamide fibre
C. engineering plastic
D. exponded polystyrene

View Answer

Question 52

Condensation of bisphenol A with phosgene produces __________ which possess very good heat resistance.

A. Polyurathane
B. Polysulphone
C. Polycarbonate
D. Polyester

View Answer

Question 53

Low density polythene as compared to high density polythene is

A. Harder
B. Tougher
C. Chemically inert
D. More flexible

View Answer

Question 54

Starting material for the production of SBR is

A. ethyl alcohol
B. ethylene
C. both (a) & (b)
D. neither (a) nor (b)

View Answer

Question 55

Which of the following polymers belong to the class of formaldehyde resin ?

A. Melamine resins
B. Teflon
C. Dacron
D. None of these

View Answer

Question 56

Phenol formaldehyde is produced by condensation polymerisation. It is also known as

A. Teflon
B. Bakelite
C. Polyester
D. Nylon-66

View Answer

Question 57

Buna-S is also called

A. Polyurathane
B. SBR
C. Teflon
D. Bakelite

View Answer

Question 58

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

View Answer

Question 59

Non sulphonated hard bakelites are not used for making

A. Ion-exchange resins
B. Fountain pen barrels
C. Formica table tops
D. Combs

View Answer

Question 60

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

View Answer

Question 61

Bristles of tooth brushes are made of

A. Nylon-6
B. Nylon-66
C. Polystyrene
D. PVC

View Answer

Question 62

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

View Answer

Question 63

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

View Answer

Question 64

Automobile steering wheels are normally made of

A. cellulose acetate
B. cellulose nitrate
C. PVC
D. high density polythene

View Answer

Question 65

__________ scrap can be recycled & reutilised.

A. Bakelite
B. Epoxy resin
C. Polythene
D. None of these

View Answer

Question 66

Reaction of dimethyl terephthalate (DMT) and ethylene glycol produces

A. nylon-6
B. dacron
C. polyester
D. PVC

View Answer

Question 67

Nylon-6 is a

A. Polyamide
B. Thermosetting resin
C. Polyester
D. None of these

View Answer

Question 68

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

View Answer

Question 69

Main constituent of natural rubber is

A. Polystyrene
B. Polyisoprene
C. Polybutadiene
D. Poly chloroprene

View Answer

Question 70

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

View Answer

Question 71

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

View Answer

Question 72

Phenol formaldehyde

A. Employs addition polymerisation
B. Employs condensation polymerisation
C. Is a monomer
D. Is an abrasive material

View Answer

Question 73

Poly Vinyl chloride (PVC) is a __________ material.

A. Thermoplastic
B. Thermosetting
C. Fibrous
D. Chemically active

View Answer

Question 74

Polyhexamethylene adipimide is also known as

A. Bakelite
B. Nylon-66
C. Epoxy resin
D. Silicone rubber

View Answer

Question 75

The monomer of natural rubber is

A. DMT
B. Isoprene
C. 2 methyl-1-propene
D. Both B and C

View Answer

Question 76

Cellulose content in bomboo fibre is about __________ percent.

A. 10
B. 20
C. 50
D. 85

View Answer

Question 77

Which of the following is the lowest cost plastic commercially available?

A. Polythene
B. Teflon
C. Bakelite
D. PVC

View Answer

Question 78

Ebonite is a/an

A. Highly vulcanised rubber
B. Natural rubber
C. Unvulcanised raw rubber
D. Adhesive

View Answer

Question 79

Thermal pyrolysis of ethylene dichloride produces

A. Trichlorethylene
B. Vinyl chloride
C. Ethanol amine
D. Ethylene oxide

View Answer

Question 80

Polycaprolactum is

A. Nylon-6
B. Nylon-66
C. Dacron
D. Rayon

View Answer

Question 81

Vinyl flooring is done using __________ sheets.

A. polypropylene
B. PVC
C. polythene
D. polyvinyl acetate

View Answer

Question 82

Commercial production of polypropylene employs __________ polymerisation.

A. Emulsion
B. Suspension
C. Solution
D. Bulk

View Answer

Question 83

Lavatory cisterns are normally made of

A. expanded polystyrene
B. saturated polyester
C. perspex
D. PVC

View Answer

Question 84

The organic acid monomer in nylon 66 is

A. sebasic acid
B. terephthalic acid
C. adipic acid
D. benzoic acid

View Answer

Question 85

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

View Answer

Question 86

__________ polymer is used for making unbreakable crockery.

A. Thermoplastic
B. Melamine
C. Addition
D. None of these

View Answer

Question 87

The repeating units of PTFE are

A. Cl₂CH = CH₃
B. F₂ C = CF₂
C. F₃ C = CF₃
D. FClC = CF₂

View Answer

Question 88

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

View Answer

Question 89

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

View Answer

Question 90

Hot drink (e.g, tea) cups are usually made of

A. Polystyrene
B. Polythene
C. Polypropylene
D. PVC

View Answer

Question 91

__________ practically possess no elasticity.

A. Vulcanite or ebonite
B. Spandex fibre
C. Polysulphide rubber
D. Epoxy resin

View Answer

Question 92

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

View Answer

Question 93

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.

View Answer

Question 94

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

View Answer

Question 95

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

View Answer

Question 96

Which of the following polymers is used for making a non stick coating on frying pans?

A. Bakelite
B. Teflon
C. Perspex
D. PVC

View Answer

Question 97

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

View Answer

Question 98

Benzoyl chloride is not used as a catalyst in the manufacture of

A. Polystyrene
B. Polyvinyl acetate
C. Polypropylene
D. Polyvinyl chloride-co-vinylacetate

View Answer

Question 99

Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces

A. Epoxy resin
B. Polyamide
C. Alkyd resin
D. Phenolic resin

View Answer

Question 100

Softening point of high density polythene is about __________ °C.

A. 85
B. 135
C. 165
D. 205

View Answer

Question 101

Zeigler - Natta catalyst (AlR3 - AlCl3) is used in the polymerisation of

A. vinyl acetate
B. vinyl chloride
C. propylene
D. styrene

View Answer

Question 102

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

View Answer

Question 103

Buna-N is also called

A. Butyl rubber
B. Nitrile rubber
C. Neoprene
D. Thiokol

View Answer

Question 104

Polypropylene compared to polythene is

A. Harder
B. Stronger
C. Lighter
D. All of the above

View Answer

Question 105

Vulcanisation of rubber does not increase its

A. Elasticity
B. Plasticity
C. Ductility
D. None of these

View Answer

Question 106

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

View Answer

Question 107

Polypropylene is preferred to polythene, because the former is

A. Non-inflammable
B. Harder
C. Stronger
D. Both B & C

View Answer

Question 108

Polystyrene is a __________ plastic at room temperature.

A. Ductile
B. Brittle
C. Malleable
D. None of these

View Answer

Question 109

Neoprene is the trade name of

A. polyurethane
B. phenol formaldehyde
C. polychlorophrene
D. styrene butadiene rubber (SBR)

View Answer

Question 110

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

View Answer

Question 111

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

View Answer

Question 112

__________ is produced by polymerisation of chloroprene.

A. Thiokol (a polysulphide rubber)
B. Butyl rubber
C. Neoprene
D. Polyurathane rubber

View Answer

Question 113

The generic chemical name for the class of polymers which are commerically known as nylons is

A. Polyolefins
B. Polyamide
C. Polyacrylate
D. Polyurathane

View Answer

Question 114

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

View Answer

Question 115

Main constituent of cotton fibre is

A. Lignin
B. Cellulose
C. Starch
D. Gelatine

View Answer

Question 116

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

View Answer

Question 117

Properties of a polymer is affected by the

A. Chain length
B. Intermolecular forces
C. Branching & cross-linking
D. All of the above

View Answer

Question 118

Bakelite is

A. Same as polytetra flouro ethylene (PTFE)
B. An inorganic polymer
C. Same as thermoset phenol formaldehyde
D. Not a polymer

View Answer

Question 119

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

View Answer

Question 120

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

View Answer

Question 121

Which of the following is stretched into fibres?

A. Saturated polyester
B. Unsaturated polyester
C. Isoprene
D. Bakelite

View Answer

Question 122

__________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate.

A. Fibrous
B. Leathery
C. Rubbery
D. Hard

View Answer

Question 123

Which of the following is generally not drawn into fibre?

A. Polyamide
B. Unsaturated polyesters
C. Saturated polyesters
D. Polyacrylonitrile

View Answer

Question 124

Maximum consumption of polymers is in

A. Electrical insulation
B. Toys making
C. Coating and films
D. Packaging

View Answer

Question 125

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

View Answer

Question 126

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

View Answer

Question 127

Which of the following is not a natural fibre?

A. Silk
B. Viscose rayon
C. Wool
D. Cotton

View Answer

Question 128

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

View Answer

Question 129

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

View Answer

Question 130

Polymerisation of poly functional monomers produces polymers having

A. Good machanical strength
B. Low viscosity
C. Low melting point
D. None of these

View Answer

Question 131

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

View Answer

Question 132

Which of the following types of polymers has the strongest inter particle forces?

A. Elastomers
B. Fibres
C. Thermoplastics
D. Thermosetting polymers

View Answer

Question 133

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

View Answer

Question 134

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

View Answer

Question 135

Which of the following polymers shows the highest anti-tacking properties?

A. Melamine formaldehyde resin
B. Phenolic resin
C. Epoxy resin
D. Alkyd resin

View Answer

Question 136

Most of the plastics are safe to be used upto a maximum temperature of __________ °C.

A. 100
B. 150
C. 350
D. 450

View Answer

Question 137

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

View Answer

Question 138

Which of the following is a copolymer?

A. Polystyrene
B. SBR
C. P.T.F.E.
D. Polypropylene

View Answer

Question 139

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

View Answer

Question 140

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

View Answer

Question 141

Styrene butadiene rubber is commercially manufactured by

A. Bulk polymerisation
B. Suspension polymerisation
C. Solution polymerisation
D. Emulsion polymerisation

View Answer

Question 142

Branched chair polymers as compared to linear polymers have

A. Higher melting point
B. Higher tensile strength
C. Lower density
D. None of these

View Answer

Question 143

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

View Answer

Question 144

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

View Answer

Question 145

Poly tetra flouro ethylene (PTFE) is known as

A. Dacron
B. Teflon
C. Bakelite
D. Celluloid

View Answer

Question 146

Tubeless tyres are made of __________ rubber, which is a co-polymer of isoprene & isobutylene.

A. nitrile
B. silicone
C. neoprene
D. butyl

View Answer

Question 147

Buna-S is a __________ material.

A. fibrous
B. plastic
C. resinous
D. rubbery

View Answer

Question 148

Which of the following is not a polymer of two monomers?

A. Teflon
B. Bakelite
C. SBR
D. None of these

View Answer

Question 149

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

View Answer

Question 150

Plastic articles are normally produced by __________ moulding.

A. Green sand
B. Injection
C. Shell
D. Dry sand

View Answer

Question 151

Polymethyl methacrylate, which is an acrylic resin, is also called

A. Thiokol
B. Plexiglass or lucite
C. Dacron
D. Teflon

View Answer

Question 152

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

View Answer

Question 153

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

View Answer

Question 154

Vulcanisation of rubber does not increase its

A. Softness
B. Oxidation resistance
C. Weight & strength
D. Elasticity & water solubility

View Answer

Question 155

Which of the following polymers belong to the class of formaldehyde resin?

A. Melamine resins
B. Teflon
C. Dacron
D. None of these

View Answer

Question 156

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

View Answer

Question 157

Teflon is

A. Phenol formaldehyde
B. An inorganic polymer
C. Polytetra florouethylene (PTFE)
D. A monomer

View Answer

Question 158

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

View Answer

Question 159

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

View Answer

Question 160

Rayon is a __________ fibre.

A. Cellulosic
B. Polyamide
C. Polyester
D. Natural

View Answer

Question 161

Flexible plastic pipes are made of

A. High density polyethylene (HDPE)
B. Low density polyethylene (LDPE)
C. Polypropylene
D. Unsaturated polyester

View Answer

Question 162

Which of the following is an elastomer?

A. Thiokol
B. Phenol formaldehyde
C. Urea formaldehyde
D. Polystyrene

View Answer

Question 163

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.

View Answer

Question 164

__________ is not a polyester fibre.

A. Terylene
B. Dacron
C. Nylon
D. Polyacrylonitrite

View Answer

Question 165

Which of the following is not a polyolefin?

A. Polystyrene
B. Polypropylene
C. Neoprene
D. None of these

View Answer

Question 166

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

View Answer

Question 167

Density of low density polythene is about __________ gm/c.c.

A. 0.38
B. 0.56
C. 0.81
D. 0.91

View Answer

Question 168

Trade name of __________ is neoprene.

A. polychloroprene
B. polyisoprene
C. polytetraflouroethylene
D. poly vinyl acetate

View Answer

Question 169

Glyptal used in the manufacture of paints & lacquers is a __________ polymer.

A. Polyamide
B. Polystyrene
C. Polyester
D. Polyacrylonitrile

View Answer

Question 170

Liners of bags are usually made of

A. Polythene
B. PVC
C. Polypropylene
D. Polyesters

View Answer

Question 171

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).

View Answer

Question 172

Vulcanisation of raw rubber makes it

A. Soft
B. Less elastic
C. Plastic
D. Tacky

View Answer

Question 173

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.

View Answer

Question 174

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

View Answer

Question 175

Tyres are made by

A. Injection moulding
B. Extrusion
C. Rotational moulding
D. Compression moulding

View Answer

Question 176

The starting material used for the manufacture of caprolactum is

A. Ethyl benzene
B. Cyclohexane
C. Ethylene glycol
D. DMT

View Answer

Question 177

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

View Answer

Question 178

Silicone is a/an

A. Monomer
B. Inorganic polymer
C. Thermoplastic material
D. A natural polymer

View Answer

Question 179

The conversion of caprolactum in the above case is about __________ percent.

A. 25
B. 50
C. 70
D. 90

View Answer

Question 180

Bakelite (phenol-formaldehyde) resin can not be used as

A. Decorative paint
B. Decorative laminates
C. Electrical insulation
D. Glass reinforced plastics

View Answer

Question 181

Terylene is

A. Same as dacron
B. A polyester
C. Both A & B
D. Neither A nor B

View Answer

Question 182

Dacron is a/an

A. polyester
B. unsaturated polyester
C. polyamide
D. inorganic polymer

View Answer

Question 183

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

View Answer

Question 184

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

View Answer

Question 185

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

View Answer

Question 186

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

View Answer

Question 187

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

View Answer

Question 188

Zeigler process

A. Produces high density polythene
B. Uses no catalyst
C. Produces low density polythene
D. Employs very high pressure

View Answer

Question 189

Alkyd resin can not be used for making

A. Plasticiser
B. Paint & varnish
C. Fibres
D. Film forming materials

View Answer

Question 190

Polyvinyl acetate is never used for making

A. Moulded articles
B. Fibres
C. Adhesives
D. All of the above

View Answer

Question 191

__________ is a homopolymer.

A. Neoprene
B. Bakelite
C. Nylon-66
D. Terylene

View Answer

Question 192

Celluloid is

A. cellulose acetate
B. regenerated cellulose
C. cellulose nitrate
D. cellulose acetate butyrate

View Answer

Question 193

Styrene butadiene rubber (SBR) is

A. A natural rubber
B. Another name of silicone rubber
C. A synthetic polymer
D. A synthetic monomer

View Answer

Question 194

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

View Answer

Question 195

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

View Answer

Question 196

Which of the following has the weakest intermolecular forces?

A. Polyisoprene
B. Nylon-66
C. Polystyrene
D. Bakelite

View Answer

Question 197

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

View Answer

Question 198

Polythene is a/an

A. Addition polymerisation product
B. Condensation polymerisation product
C. Thermosetting material
D. None of these

View Answer

Question 199

Paper like thin plastic articles can be produced by

A. Blow moulding
B. Vacuum thermo forming
C. Injection moulding
D. None of these

View Answer

Question 200

Buna-S is also known as

A. teflon
B. PTFE
C. SBR
D. polycrylates

View Answer

Question 201

__________ fibres are made of polyamides.

A. Dacron
B. Nylon
C. Rayon
D. Orion

View Answer

Question 202

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

View Answer

Question 203

Nitrile rubber is produced by the polymerisation of

A. acrylonitrile & butadiene.
B. acrylonitrile & styrene.
C. isobutylene & isoprene.
D. none of these.

View Answer

Question 204

Zeigler - Natta catalyst (AlR₃ - AlCl₃) is used in the polymerisation of

A. Vinyl acetate
B. Vinyl chloride
C. Propylene
D. Styrene

View Answer

Question 205

Condensation polymerisation is not involved in the manufacture of

A. Teflon
B. Polythene
C. Terylene
D. Nylon

View Answer

Question 206

Nylon-66 compared to nylon-6 has

A. Lower melting point
B. More abrasion resistant properties
C. Higher hardness
D. All of the above

View Answer

Question 207

Phthalic anhydride is used

A. In making PVC
B. As plasticisers
C. In insecticides manufacture
D. For making nylon-6

View Answer

Question 208

__________ 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

View Answer

Question 209

__________ moulding is used for shaping of thermosetting plastics exclusively.

A. Compression
B. Injection
C. Transfer
D. Extrusion

View Answer

Question 210

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

View Answer

Question 211

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

View Answer

Question 212

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).

View Answer

Question 213

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

View Answer

Question 214

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

View Answer

Question 215

Which of the following is not a condensation polymer?

A. Bakelite
B. Melamine polymer
C. Polymethylmethacrylate (PMMA)
D. None of these

View Answer

Question 216

Plastic tubes & pipes are generally made by __________ moulding.

A. Injection
B. Transfer
C. Extrusion
D. Compression

View Answer

Question 217

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

View Answer

Question 218

Ion exchange resins are made of

A. Lucite
B. Sulphonated bakelite
C. Polystyrene
D. Teflon

View Answer

Question 219

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

View Answer

Question 220

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

View Answer

Question 221

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.

View Answer

Question 222

Caprolactum, a raw material for the manufacture of nylon-6, is produced from

A. phenol
B. naphthalene
C. benzene
D. pyridine

View Answer

Question 223

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

View Answer

Question 224

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

View Answer

Question 225

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

View Answer

Question 226

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

View Answer

Question 227

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

View Answer

Question 228

Which of the following is not present in bagasse fibre?

A. Cellulose
B. Lignin
C. Pentogens
D. None of these

View Answer

Question 229

Polyvinyl alcohol is used as a

A. Cation/anion exchanger
B. Water soluble adhesive
C. Textile fibre
D. Non-sticky coating on frying pans

View Answer

Question 230

Nylon-6 as compared to nylon-66 is

A. Harder
B. More abrasion resistant
C. Having higher melting point
D. None of these

View Answer

Question 231

Which of the following is a copolymer ?

A. PVC
B. Bakelite
C. Polythene
D. Teflon

View Answer

Question 232

Polyvinyl chloride (PVC) is

A. A thermosetting material
B. A condensation polymerisation product
C. Made by employing emulsion polymerisation
D. None of these

View Answer

Question 233

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

View Answer

Question 234

Orion is

A. A copolymer
B. A condensation polymer
C. Obtained by polymerising vinyl cyanide
D. All of the above

View Answer

Question 235

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

View Answer

Question 236

Adipic acid is an intermediate in the manufacture of

A. Perspex
B. Nylon-66
C. Polystyrene
D. Bakelite

View Answer

Question 237

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

View Answer

Question 238

A copolymer of vinyl and vinylidine chloride is called

A. Treylene
B. Orlon
C. Saran
D. Dacron

View Answer

Question 239

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).

View Answer

Question 240

Linear polymers are normally

A. Thermosetting
B. Thermosplastic
C. Elastometric
D. Having extremely high softening point

View Answer

Question 241

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

View Answer

Question 242

Cation exchange resins used in water treatment is made from __________ resin.

A. Urea formaldehyde
B. Epoxy
C. Amino
D. Phenolic

View Answer

Question 243

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

A. Polymethylmethacrylate
B. Polystyrene
C. Unsaturated polyester
D. Polypropylene

View Answer

Question 244

Which of the following is not a thermoplastic material?

A. Epoxy polymer
B. PVC
C. Polystyrene
D. Polythene

View Answer

Question 245

Which of the following polymers has the tendency of decomposing before melting ?

A. Polystyrene
B. Nylon
C. PVC
D. None of these

View Answer

Question 246

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

View Answer

Question 247

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

View Answer

Question 248

The synthetic fibres produced from __________ are known as rayon.

A. lignin
B. cellulose
C. polyamides
D. ethylene glycol

View Answer

Question 249

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

View Answer

Question 250

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

View Answer

Question 251

Thermosplastic materials

A. Do not soften on application of heat
B. Are heavily branched molecules
C. Are solvent insoluble
D. None of these

View Answer

Question 252

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).

View Answer

Question 253

Alkyd resin is a/an

A. Polyamide
B. Polyester
C. Polyolefin
D. Addition polymer

View Answer

Question 254

Synthetic polymer produced by using terephthalic acid and ethylene glycol is

A. Terylene
B. Nylon-66
C. PVC
D. Polyesterene

View Answer

Question 255

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

View Answer

Question 256

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

View Answer

Question 257

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

View Answer

Question 258

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

View Answer

Question 259

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

View Answer

Question 260

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

View Answer

Question 261

Neoprene is chemically known as

A. polybutandiene
B. styrene butadiene rubber (SBR)
C. polyurethane
D. poly chloroprene

View Answer

Question 262

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

View Answer

Question 263

Which of the following is a natural polyamide fibre.

A. Wool
B. Silk
C. Cotton
D. None of these

View Answer

Question 264

Which of the following is a copolymer?

A. PVC
B. Bakelite
C. Polythene
D. Teflon

View Answer

Question 265

Density of high density polythene is about __________ gm/c.c.

A. 1.18
B. 1.05
C. 0.95
D. 0.99

View Answer

Question 266

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

View Answer

Question 267

Cellulose is the main contituent of most __________ fibres.

A. acrylic
B. spandex
C. synthetic
D. natural

View Answer

Question 268

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

View Answer

Question 269

Visco-elastic behaviour exhibited by plastics is a __________ like behaviour.

A. solid
B. liquid
C. combination of solid & liquid
D. neither solid nor liquid

View Answer

Question 270

Bakelite is a/an

A. Addition polymer
B. Elastomer
C. Thermoplastic
D. None of these

View Answer

Question 271

Polymethyl methacrylate (PMMA) is known as

A. bakelite
B. teflon
C. perspex
D. nylon-6

View Answer

Question 272

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

View Answer

Question 273

__________ is a copolymer.

A. Nylon-66
B. Polyrophylene
C. PVC
D. Poly tetra flouro ethylene

View Answer

Question 274

__________ is an addition polymer

A. Nylon
B. Bakelite
C. Polythene
D. None of these

View Answer

Question 275

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

View Answer

Question 276

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

View Answer

Question 277

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

View Answer

Question 278

Thermosetting materials

A. Are cross-linked molecules
B. Soften on application of heat
C. Are solvent soluble
D. None of these

View Answer

Question 279

Elastomers are

A. Thermosetting material
B. Exemplified by protein derivatives
C. Having high flexural strength
D. Having very high tensile strength and heat resistance

View Answer

Question 280

__________ is a thermosetting plastic.

A. PVC
B. Polythene
C. Bakelite
D. Polystyrene

View Answer

Question 281

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

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Question 282

Unbreakable crockeries are made from __________ polymers.

A. Polystyrene
B. Melamine
C. Polystyrene
D. Polyurathane

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Question 283

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

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Question 284

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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Question 285

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

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Question 286

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

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Question 287

__________ is a natural fibre.

A. Cellulose
B. Dacron
C. Nylon-6
D. None of these

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Question 288

Condensation polymerisation of __________ produces bakelite.

A. Propylene
B. Phenol & formaldehyde
C. Phenol & acetaldehyde
D. Urea & formaldehyde

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Question 289

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

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Question 290

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

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Question 291

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

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Question 292

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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Question 293

Starting material for the production of SBR is

A. Ethyl alcohol
B. Ethylene
C. Both A & B
D. Neither A nor B

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Question 294

Polycaprolactum is nothing but

A. Orlon
B. Nylon 6, 6
C. Nylon 6
D. Saran

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Question 295

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

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Question 296

__________ 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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Question 297

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

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Question 298

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

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Question 299

The monomer for the production of neoprene rubber is

A. Acetylene
B. Chloroprene
C. Isoprene
D. None of these

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Question 300

Flexible foam (for mattresses) are usually made of

A. PVC
B. Silicone rubber
C. Polyurethanes
D. Polyamides

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Question 301

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

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Question 302

Perspex can be used as a substitute of glass. Its monomer is

A. Methyl methacrylate
B. DMT
C. Butadiene
D. Tetrafluroethylene

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Question 303

Polyurathane can not be used for making

A. Mattresses & foam
B. Coating material
C. Adhesives
D. Bottles

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Question 304

Branched chain polymers compared to linear polymers have higher

A. Density
B. Tensile strength
C. Melting point
D. Degree of irregularity in atomic packing

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Question 305

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

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Question 306

β - glucose is the monomer of

A. Cellulose
B. Starch
C. Protein
D. None of these

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Question 307

Neoprene is a

A. monomer
B. synthetic rubber
C. polyester
D. none of these

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Question 308

Transistor parts and refrigerator components are normally made of

A. polystyrene
B. polyester
C. high density polythene
D. polyurathane

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Question 309

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

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Question 310

Condensation polymerisation of formaldehyde with __________ does not produce phenolic resin.

A. Resorcinol
B. Phenol
C. Para-cresol
D. Melamine

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