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Q.1
Pickout the wrong statement.
Polymers made of only one monomer is called homopolymer
Polymers made of more than one monomer is called copolymer or mixed polymer
Vulcanised rubber is more elastic than natural rubber
The intermoleculer forces in ther-mosplastic polymers are intermediate to that of elastomers & fibres
Q.2
The monomer for the production of neoprene rubber is
Acetylene
Chloroprene
Isoprene
None of these
Q.3
Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of
Cold SBR
Butyl rubber
Bunai N
Buna S
Q.4
Orion is
A copolymer
A condensation polymer
Obtained by polymerising vinyl cyanide
All of the above
Q.5
__________ moulding is used for shaping of thermosetting plastics exclusively.
Compression
Injection
Transfer
Extrusion
Q.6
Transistor parts and refrigerator components are normally made of
Polystyrene
Polyester
High density polythene
Polyurathane
Q.7
Polyvinyl chloride (PVC) is
A thermosetting material
A condensation polymerisation product
Made by employing emulsion polymerisation
None of these
Q.8
In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the
Hexamethylene diamine and the ring
Hexamethylene diamine and the adipic acid
Adipic acid and the ring
None of these
Q.9
Which of the following is not a polyolefin?
Polystyrene
Polypropylene
Neoprene
None of these
Q.10
Which of the following is not a polymer of two monomers?
Teflon
Bakelite
SBR
None of these
Q.11
Catalyst used in the production of high density polythene by low pressure Ziegler process is
Aluminium triethyl activated with TiCl₄
Platinum
Molybdenum
Nickel
Q.12
Ion exchange resins are made of
Lucite
Sulphonated bakelite
Polystyrene
Teflon
Q.13
Which of the following types of polymers has the strongest inter particle forces?
Elastomers
Fibres
Thermoplastics
Thermosetting polymers
Q.14
Nylon-6 is a
Polyamide
Thermosetting resin
Polyester
None of these
Q.15
Nylon-6 is manufactured from
Caprolactum
Adipic acid and hexamethylene diamine
Maleic anhydride and hexamethylene diamine
Sebasic acid and hexamethylene diamine
Q.16
Which of the following is not an elastomer?
Polyisoprene
Neoprene
Nitrile-butadiene
None of these
Q.17
Nylon-66 is manufactured from
Adipic acid and hexamenthylene diamine
Caprolactum
Maleic anhydride and hexamethylene diamine
Dimethyl terephthalate (DMT) and ethylene glycol
Q.18
Polymerisation product of C₂F₄ (carbon tetraflouride) is called P.T.F.E. (poly chloro tetra flouro ethylene). It is also called
Polyurethane
Silicone rubber
Teflon
Epoxy resin
Q.19
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
Terylene
Polybutadiene
PVC
Polypropylene
Q.20
Pick out the wrong statement.
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
Crimp is a measure of the difference between the length of the straightened and unstraightend fibre
Dacron fibres, acrylic fibres, viscose rayon fibres & cellulose acetate fibres are all prepared by wet spinning
Nylon fibres have greater water absorption capacity than polyester fibres
Q.21
The inter particle forces between linear chains in nylon-66 are __________ bonds.
Hydrogen
Covalant
Ionic
None of these
Q.22
Nylon-66 is a polyamide of
Hexamethylene diamine and adipic acid
Adipic acid and methyl amine
Vinyl chloride and formaldeyde
None of these
Q.23
Which of the following natural bio polymers are formed as a result of polymerisation of amino-acids?
Starch
Cellulose
Proteins
Nucleic acids
Q.24
Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is
7 kgf/cm² and 70 °C
1000 kgf/cm² and 100°C
7 kgf/cm² and 700°C
1 kgf/cm² (gage) and 70°C
Q.25
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
Teflon
Bakelite
SBR
PVC
Q.26
Low pressure Zeigler process of polythene manufacture
Employs a pressure of 30 kgf/cm²
Achieves an yield of 95-98% based on ethylene
Produces very low density polythene
Does not use any catalyst for polymerisation
Q.27
Automobile steering wheels are normally made of
Cellulose acetate
Cellulose nitrate
PVC
High density polythene
Q.28
Pick out the wrong statement.
Cold SBR is superior as compared to hot SBR
Polymerisation temperature can modify the properties of SBR
Production of cold SBR employs lower pressure as compared to that of hot SBR
None of these
Q.29
Polymerisation of poly functional monomers produces polymers having
Good machanical strength
Low viscosity
Low melting point
None of these
Q.30
The generic chemical name for the class of polymers which are commerically known as nylons is
Polyolefins
Polyamide
Polyacrylate
Polyurathane
Q.31
Plastic articles are normally produced by __________ moulding.
Green sand
Injection
Shell
Dry sand
Q.32
Which of the following is not a thermoplastic material?
Epoxy polymer
PVC
Polystyrene
Polythene
Q.33
Which of the following is not present in bagasse fibre?
Cellulose
Lignin
Pentogens
None of these
Q.34
Main constituent of natural rubber is
Polystyrene
Polyisoprene
Polybutadiene
Poly chloroprene
Q.35
Density of low density polythene is about __________ gm/c.c.
0.38
0.56
0.81
0.91
Q.36
Neoprene is a
Monomer
Synthetic rubber
Polyester
None of these
Q.37
Neoprene is the trade name of
Polyurethane
Phenol formaldehyde
Polychlorophrene
Styrene butadiene rubber (SBR)
Q.38
Which of the following additives are added to plastics to make it impervious to X-rays?
Asbestos
Barium salt
Carborundum
Phthalic acid
Q.39
Mastication of rubber means
Its softening
A treatment to retard its deterioration due to oxidation
Improving its curing rate
Depression of its freezing point
Q.40
Tubeless tyres are made of __________ rubber, which is a co-polymer of isoprene & isobutylene.
Nitrile
Silicone
Neoprene
Butyl
Q.41
Polycaprolactum is also known as
Nylon-66
Nylon-6
Teflon
SBR
Q.42
Which of the following low molecular weight (<10⁴ ), soft & waxy polymer is used in chewing gum?
Cellulose acetate
Polyvinyl acetate
Thiokol
PVC
Q.43
Polypropylene is preferred to polythene, because the former is
Non-inflammable
Harder
Stronger
Both B & C
Q.44
Diphenylamine is added to rubber to
Valcanise it
Protect it from deterioration on exposure to air
Make it non-inflammable
Make it thermosetting
Q.45
Which of the following is generally not drawn into fibre?
Polyamide
Unsaturated polyesters
Saturated polyesters
Polyacrylonitrile
Q.46
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?
Bakelite (phenol formaldehyde)
Polyester
Polythene
Nylon-6
Q.47
Branched chair polymers as compared to linear polymers have
Higher melting point
Higher tensile strength
Lower density
None of these
Q.48
__________ is normally used for the manufacture of refrigerator components and transistor parts.
Polyproylene
Polystyrene
Polyester
Polyurathene
Q.49
Polycaprolactum (Nylon - 6) is produced by the condensation polymerisation of caprolactum at 240-280°C in which the conversion of caprolactum is about __________ percent.
50
75
90
99
Q.50
Unbreakable crockeries are made from __________ polymers.
Polystyrene
Melamine
Polystyrene
Polyurathane
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