chemical engineering polymer technology MCQs – Page 2

Practise multiple-choice questions from chemical engineering polymer technology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering polymer technology Mcqs
51. The monomer for the production of neoprene rubber is_________________?
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A. Acetylene

B. None of these

C. Isoprene

D. Chloroprene
52. 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 ?
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A. Polyester

B. Nylon-6

C. Polythene

D. Bakelite (phenol formaldehyde)
53. The synthetic fibres produced from _____________ are known as rayon?
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A. Ethylene glycol

B. Cellulose

C. Lignin

D. Polyamides

54. SBR is produced by the copolymerisation of butadiene & styrene by employing emulsion polymerisation. The weight ratio of styrene and butadiene is maintained at_________________?
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A. 1:02

B. 2:01

C. 3:01

D. 1: 3
55. Polythene is a/an________________?
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A. Addition polymerisation product

B. Thermosetting material

C. Condensation polymerisation product

D. None of these

56. Identify the group in which all the polymers mentioned can be used to make fibres ?
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A. Cellulose derivatives, Polyisoprene, Polyethylene

B. Polypropylene, Poly vinyl chloride, Silicon

C. Cellulose derivatives, Polyamides, Polyurethane

D. Butadiene copolymers, Polyamides, Urea-formaldehyde

57. ______________are produced by reacting polybasic acid (e.g. Phthalic anhydride) with polyhydric alcohol (e.g., glycerol) ?
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A. Saturated polyester

B. Unsaturated polyester

C. Amino resins

D. Alkyd resins
58. Nylon-6 is manufactured from _______________?
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A. Caprolactam

B. Maleic anhydride and Hexamethylenediamine

C. Adipic acid and Hexamethylenediamine

D. Sebacic acid and Hexamethylenediamine

59. Addition of stabiliser during PVC manufacture is done to________________?
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A. Prevent its thermal degradation

B. Reduce the melt viscosity & glass transition temperature

C. Improve its elasticity

D. Improve its impact strength

60. Teflon is__________________?
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A. Polytetrafluroethylene (PTFE)

B. An inorganic polymer

C. Phenol formaldehyde

D. A monomer

61. Which of the following has the weakest intermolecular forces ?
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A. Bakelite

B. Polyisoprene

C. Polystyrene

D. Nylon-66

62. Caprolactam, a raw material for the manufacture of nylon-6, is produced from_______________?
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A. Pyridine

B. Naphthalene

C. Phenol

D. Benzene
63. Transistor parts and refrigerator components are normally made of_____________________?
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A. Polyurethane

B. High density polythene

C. Polystyrene

D. Polyester

64. Silicone resins, which are highly water repellent and has good heat resistance cannot be used___________________?
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A. Hydraulic fluid for heat transfer

B. Resin for lamination

C. As room temperature adhesive

D. As grease & lubricant

65. Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butadiene rubber) are____________________?
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A. 50C and 1 kgf/cm2

B. 250C and 10 kgf/cm2

C. 50C and 3 4 kg/cm2

D. 250C and 1 kgf/cm2

66. Which of the following types of polymers has the strongest inter particle forces ?
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A. Thermosetting polymers

B. Elastomers

C. Thermoplastics

D. Fibres

67. Epoxy resins (i.e., epoxide polymers) ?
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A. Are made by addition polymerisation reaction only

B. Contain an epoxy group (fig bellow) at the ends of the polymer

C. Are cross-linked polymers only

D. Use emulsion polymerisation methods

68. Which of the following polymers belong to the class of formaldehyde resin ?
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A. None of these

B. Dacron

C. Melamine resins

D. Teflon

69. Addition polymerisation is not involved in the manufacture of_______________?
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A. Polystyrene

B. Poly vinyl chloride

C. Polyhexamethylene adipamide

D. Low density polythene

70. Which of the following is the most important rubber compounding ingredient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness ?
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A. Carbon black

B. Rosin

C. Pine oil

D. Phosphorous

71. ______________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine?
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A. Amino

B. Epoxy

C. Phenolic

D. Alkyd

72. Polyurethane cannot be used for making____________________?
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A. Adhesives

B. Bottles

C. Coating material

D. Mattresses & foam

73. Neoprene is the trade name of________________?
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A. Phenol formaldehyde

B. Polychlorophrene

C. Styrene butadiene rubber (SBR)

D. Polyurethane

74. Acrylonitrile-butadiene-styrene (ABS) copolymer, which is produced by blending styreneacrylonitrile copolymer with butadiene based elastomer, is a/an__________________?
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A. Engineering plastic

B. Rigid foam

C. Spongy rubber

D. Thermosetting polymer

75. Cation exchange resins used in water treatment is made from _____________ resin?
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A. Amino

B. Epoxy

C. Urea formaldehyde

D. Phenolic

76. Which of the following polymers has the tendency of decomposing before melting ?
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A. PVC

B. Nylon

C. None of these

D. Polystyrene

77. Vulcanisation of rubber decreases its__________________?
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A. Working temperature range

B. Tackiness

C. Resistance to organic solvents

D. Tensile strength

78. 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_________________?
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A. Chloroethane

B. Isoprene

C. None of these

D. Chloroprene
79. Thermosetting polymers as compared to thermoplastic polymers_____________________?
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A. Are formed by addition polymerisation

B. Have linear structure

C. Have three dimensional structure

D. None of these

80. Flexible plastic pipes are made of___________________?
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A. Unsaturated polyester

B. Low density polyethylene (LDPE)

C. Polypropylene

D. High density polyethylene (HDPE)

81. Maximum consumption of polymers is in___________________?
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A. Coating and films

B. Toys making

C. Electrical insulation

D. Packaging

82. Pick out the wrong statement regarding the solubility characteristics of high polymers?
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A. High molecular weight polymers on dissolving gives solution of very low viscosity

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. Greater the degree of cross-linking in the polymer, lesser is its solubility

83. In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the_________________?
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A. Hexamethylene diamine and the ring

B. Adipic acid and the ring

C. None of these

D. Hexamethylene diamine and the adipic acid
84. Density of high density polythene is about __________ gm/c.c ?
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A. 0.95

B. 1.05

C. 0.99

D. 1.18

85. Orion is_________________?
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A. A copolymer

B. A condensation polymer

C. Obtained by polymerising vinyl cyanide

D. All A., B. and C.

86. Poly-methyl-methacrylate (PMMA) is known as_______________?
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A. Nylon-6

B. Perspex

C. Teflon

D. Bakelite

87. _____________ is not a polyester fiber?
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A. Dacron

B. Polyacrylonitrile

C. Terylene

D. Nylon
88. Celluloid is__________________?
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A. Cellulose nitrate

B. Regenerated cellulose

C. Cellulose acetate

D. Cellulose acetate butyrate

89. Addition polymerisation takes place either by a free radical mechanism or ionic mechanism depending on the reagents used. Free radical polymerisation is catalyzed by _______________, which decompose to give free radicals?
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A. Sulphuric acid

B. Organic peroxides

C. Hydrofluoric acid

D. None of these

90. Polystyrene is a ____________ plastic at room temperature?
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A. None of these

B. Malleable

C. Brittle

D. Ductile

91. Cross linked polymers formed from bi-and trifunctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer ______________ properties?
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A. Elastometric

B. Thermosetting

C. Brittleness

D. Thermoplastic

92. The main use of butadiene is____________________?
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A. As an anti-skimming agent in paint

B. In the manufacture of synthetic rubber

C. None of these

D. As a plasticiser for unsaturated polyester

93. Bakelite is a/an ______________________?
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A. None of these

B. Addition polymer

C. Thermoplastic

D. Elastomer

94. Alkyd resin is a/an___________________?
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A. Polyamide

B. Polyester

C. Polyolefin

D. Addition polymer

95. Polyvinyl acetate is never used for making_________________?
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A. Fibres

B. All A., B. & C.

C. Adhesives

D. Moulded articles
96. Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces________________?
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A. Phenolic resin

B. Polyamide

C. Alkyd resin

D. Epoxy resin

97. Pick out the wrong statement ?
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A. Cross-linked branched chain polymers are either elastometric or thermosetting

B. Linear polymers are formed from bifunctional groups only and are normally thermoplastic

C. unctional monomer formulation reduces its solubility and increases the softening point

D. Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation

E. ction</strong>

F. Branching in case of cross-linked polymers caused by small amount of impurities in

98. Silicone is a/an ___________________?
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A. A natural polymer

B. Monomer

C. Thermoplastic material

D. Inorganic polymer
99. Melt spinning of polymers involves the forcing of polymer melt through spinnerates (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?
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A. Nylon 6:6

B. Polyester

C. Acrylic

D. Polypropylene

100. Plexiglass (also called Lucite) because of its high optical transparency is used for making lenses. It is chemically_________________?
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A. Polymethyl methacrylate (PMMA)

B. Polycarbonates

C. Polytetrafluroethylene (PTFE)

D. Phenolic resins