chemical engineering polymer technology Mcqs
51. The monomer for the production of neoprene rubber is_________________?
comments icon0

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 ?
comments icon0

A. Polyester

B. Nylon-6

C. Polythene

D. Bakelite (phenol formaldehyde)
53. The synthetic fibres produced from _____________ are known as rayon?
comments icon0

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_________________?
comments icon0

A. 1:02

B. 2:01

C. 3:01

D. 1: 3
55. Polythene is a/an________________?
comments icon0
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 ?
comments icon0
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) ?
comments icon0

A. Saturated polyester

B. Unsaturated polyester

C. Amino resins

D. Alkyd resins
58. Nylon-6 is manufactured from _______________?
comments icon0
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________________?
comments icon0
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__________________?
comments icon0
A. Polytetrafluroethylene (PTFE)

B. An inorganic polymer

C. Phenol formaldehyde

D. A monomer

61. Which of the following has the weakest intermolecular forces ?
comments icon0

A. Bakelite

B. Polyisoprene

C. Polystyrene

D. Nylon-66

62. Caprolactam, a raw material for the manufacture of nylon-6, is produced from_______________?
comments icon0

A. Pyridine

B. Naphthalene

C. Phenol

D. Benzene
63. Transistor parts and refrigerator components are normally made of_____________________?
comments icon0

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___________________?
comments icon0

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____________________?
comments icon0

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 ?
comments icon0
A. Thermosetting polymers

B. Elastomers

C. Thermoplastics

D. Fibres

67. Epoxy resins (i.e., epoxide polymers) ?
comments icon0

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 ?
comments icon0

A. None of these

B. Dacron

C. Melamine resins

D. Teflon

69. Addition polymerisation is not involved in the manufacture of_______________?
comments icon0

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 ?
comments icon0
A. Carbon black

B. Rosin

C. Pine oil

D. Phosphorous

71. ______________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine?
comments icon0
A. Amino

B. Epoxy

C. Phenolic

D. Alkyd

72. Polyurethane cannot be used for making____________________?
comments icon0

A. Adhesives

B. Bottles

C. Coating material

D. Mattresses & foam

73. Neoprene is the trade name of________________?
comments icon0

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__________________?
comments icon0
A. Engineering plastic

B. Rigid foam

C. Spongy rubber

D. Thermosetting polymer

75. Cation exchange resins used in water treatment is made from _____________ resin?
comments icon0

A. Amino

B. Epoxy

C. Urea formaldehyde

D. Phenolic

76. Which of the following polymers has the tendency of decomposing before melting ?
comments icon0
A. PVC

B. Nylon

C. None of these

D. Polystyrene

77. Vulcanisation of rubber decreases its__________________?
comments icon0

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_________________?
comments icon0

A. Chloroethane

B. Isoprene

C. None of these

D. Chloroprene
79. Thermosetting polymers as compared to thermoplastic polymers_____________________?
comments icon0

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___________________?
comments icon0

A. Unsaturated polyester

B. Low density polyethylene (LDPE)

C. Polypropylene

D. High density polyethylene (HDPE)

81. Maximum consumption of polymers is in___________________?
comments icon0
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?
comments icon0
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_________________?
comments icon0

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 ?
comments icon0
A. 0.95

B. 1.05

C. 0.99

D. 1.18

85. Orion is_________________?
comments icon0

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_______________?
comments icon0

A. Nylon-6

B. Perspex

C. Teflon

D. Bakelite

87. _____________ is not a polyester fiber?
comments icon0

A. Dacron

B. Polyacrylonitrile

C. Terylene

D. Nylon
88. Celluloid is__________________?
comments icon0
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?
comments icon0

A. Sulphuric acid

B. Organic peroxides

C. Hydrofluoric acid

D. None of these

90. Polystyrene is a ____________ plastic at room temperature?
comments icon0

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?
comments icon0
A. Elastometric

B. Thermosetting

C. Brittleness

D. Thermoplastic

92. The main use of butadiene is____________________?
comments icon0

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 ______________________?
comments icon0
A. None of these

B. Addition polymer

C. Thermoplastic

D. Elastomer

94. Alkyd resin is a/an___________________?
comments icon0

A. Polyamide

B. Polyester

C. Polyolefin

D. Addition polymer

95. Polyvinyl acetate is never used for making_________________?
comments icon0

A. Fibres

B. All A., B. & C.

C. Adhesives

D. Moulded articles
96. Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces________________?
comments icon0

A. Phenolic resin

B. Polyamide

C. Alkyd resin

D. Epoxy resin

97. Pick out the wrong statement ?
comments icon0

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 ___________________?
comments icon0

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?
comments icon0

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_________________?
comments icon0
A. Polymethyl methacrylate (PMMA)

B. Polycarbonates

C. Polytetrafluroethylene (PTFE)

D. Phenolic resins