Question 1.
Bakelite is an example of
(a) elastomer
(b) fibre
(c) thermoplastic
(d) thermosetting

Answer

Answer: (d) thermosetting

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Question 2.
Arrange the following polymers is an increasing order of intenqolecular forces: fibre, plastic, elastomer
(a) Elastomer < Fibre < Plastic
(b) Elastomer < Plastic < Fibre
(c) Plastic < Elastomer < Fibre
(d) Fibre < Elastomer < Plastic

Answer

Answer: (b) Elastomer < Plastic < Fibre

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Question 3.
The correct structure of monomers of buna-S is

Answer

Answer: (c)

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Question 4.
The S in buna-S refers to
(a) Sulphur
(b) Styrene
(c) Sodium
(d) Salicylate

Answer

Answer: (b) Styrene

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Question 5.
Identify the type of polymer
(i) -A-A-A-A-A-A-
(ii) -A-B-B-A-A-A-B-A-
(a) (i) Homopolymer, (ii) Copolymer
(b) (i) Natural polymer, (ii) Synthetic polymer
(c) (i) Linear polymer, (ii) Branched polymer
(d) (i) Fibre, (ii) Elastomer

Answer

Answer: (a) (i) Homopolymer, (ii) Copolymer

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Question 6.
Which of the following are thermoplastic polymers?
(a) Polythene, urea-formaldehyde, polyvinyls
(b) Bakelite, polythene, polystyrene
(c) Polythene, polystyrene, polyvinyls
(d) Urea-formaldehyde, polystyrene, bakelite

Answer

Answer: (c) Polythene, polystyrene, polyvinyls

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Question 7.
Glycogen, anaturally occuring polymer stored in animals is a
(a) monosaccharide
(b) disaccharide
(c) trisaccharide
(d) polysaccharide

Answer

Answer: (d) polysaccharide

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Question 8.
Nylon 6, 6 is obtained by condensation polymerisation of
(a) adipic acid and ethylene glycol
(b) adipic acid and hexamethylenediamine
(c) terephthalic acid and ethylene glycol
(d) adipic acid and phenol

Answer

Answer: (b) adipic acid and hexamethylenediamine

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Question 9.
Terylerte is a condensation polymer of ethylene glycol and
(a) benzoic acid
(b) phthalic acid
(c) dimethyl terephthalate
(d) salicylic acid

Answer

Answer: (c) dimethyl terephthalate

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Question 10.
Natural rubber is a polymer of
(a) 1, 1-dimethylbufadiene
(b) 2-methyl-1, 3-rbutadiene
(c) 2-chlorobuta-1, 3-diene
(d) 2-chlorobut-2-ene

Answer

Answer: (b) 2-methyl-1, 3rbutadiene

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Question 11.
Heating rubber with sulphur is known as
(a) galvanisation
(b) bessemerisation
(c) vulcanisation
(d) sulphonation

Answer

Answer: (c) vulcanisation

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Question 12.
Dacron is an example of
(a) polyamides
(b) polypropenes
(c) polyacrylnitrfle
(d) polyesters

Answer

Answer: (d) polyesters

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Question 13.
Which of the following is a condensation polymer?
(a) Teflon
(b) PVC
(c) Polyester
(d) Neoprene

Answer

Answer: (c) Polyester

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Question 14.
Which of the following polymers does not involve cross-linkages?
(a) Vulcanised rubber
(b) Bakelite
(c) Melamine
(d) Teflon

Answer

Answer: (d) Teflon

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Question 15.
Composition of Ziegler-Natta catalyst is
(a) (Et₃)₃Al.TiCl₂
(b) (Me)₃Al.TiCl₂
(c) (Et)₃Al.TiCl₄
(d) (Et)₃Al.PtCl₄

Answer

Answer: (c) (Et)₃Al.TiCl₄

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Question 16.
Which of the following is not an example of addition polymer?
(a) Polythene
(b) Polystyrene
(c) Neoprene
(d) Nylon 6,6

Answer

Answer: (d) Nylon 6,6

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Question 17.
Teflon and neoprene are the examples of
(a) copolymers
(b) monomers
(c) homopolymers
(d) condensation polymers

Answer

Answer: (c) homopolymers

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Question 18.
Which of the following sets contains only addition polymers?
(a) Polyethylene, polypropylene, terylene
(b) Polyethylene, PVC, acrilan
(c) Buna-S, nylon, polybutadiene
(d) Bakelite, PVC, polyethylene

Answer

Answer: (b) Polyethylene, PVC, acrilan

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Question 19.
Which among the following is a cross-linked polymer?
(a) Polyesters
(b) Glycogens
(c) Melamine-formaldehyde
(d) Polyvinyl chloride

Answer

Answer: (c) Melamine-formaldehyde

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Question 20.
Synthetic polymer prepared by using caprolactam is known as
(a) terylene
(b) teflon
(c) nylon 6
(d) neoprene

Answer

Answer: (c) nylon 6

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Question 21.
Polymer which has amide linkage is
(a) nylon-6, 6
(b) terylene
(c) teflon
(d) bakelite

Answer

Answer: (a) nylon-6, 6

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Question 22.
Which of the following is not an example of rubber?
(a) Polychloroprene
(b) Buna-N
(c) Butadiene-styrene copolymer
(d) Polyacrylonitrile

Answer

Answer: (d) Polyacrylonitrile

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Question 23.
Which of the following polymers does not have vinylic monomer units?
(a) Acrilan
(b) Nylon
(c) Polystyrene
(d) Neoprene

Answer

Answer: (b) Nylon

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Question 24.
cis-Polyisoprene possesses elastic property because
(a) It is soft and soluble in non-polar solvent
(b) It is unsaturated and porous
(c) It has a coiled structure and chains held together by weak van der waals forces
(d) It has fibrous structure and reactive sites at various double bonds

Answer

Answer: (c) It has a coiled structure and chains held together by weak van der waals forces

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Question 25.
The monomers used in addition polymerisation through free radical should be very pure because
(a) the traces of impurities act like inhibitors resulting in short chain polymers
(b) the impurities result in formation of different products
(c) the polymer formed is impure
(d) catalyst does not function in presence of impurities

Answer

Answer: (a) the traces of impurities act like inhibitors resulting in short chain polymers

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