1. : High density polyethylene has _______ type of structure.
(A) Cross-linked
(B) Branch-chain
(C) Linear
(D) Any one of these
2. : In which polymer the strength of intermolecular forces is maximum?
(A) Elastomers
(B) Cross-linked polymer
(C) Fiber
(D) Thermoplastic
3. : Monomer of natural rubber is
(A) 1,3-Butadiene
(B) 1,3-Pentadiene
(C) 1,2-Butadiene
(D) 2-Methyl-1,3-butadiene
4. : Which is homopolymer?
(A) Starch
(B) Orlon
(C) Plexiglas
(D) All of these
5. : The Nylon-66 is ________ type of polymer.
(A) Polyester
(B) Polyamide
(C) Addition
(D) Homopolymer
6. : Which is branch-chain polymer?
(A) Terylene
(B) Glycogen
(C) PVC
(D) Orlon
7. : Polyamide linkage is present in
(A) Nylon
(B) Protein
(C) Silk
(D) All of these
8. : In propagation step the reaction intermediate of radical polymerization is
(A) Free radical
(B) Carbanion
(C) Carbocation
(D) Carbene
9. : In which polymerization branching of chain cannot be possible?
(A) Free radical
(B) Cationic
(C) Anionic and Ziegler-Natta
(D) Anionic
10. : Cationic polymerization is initiated by
(A) BuLi
(B) NaNH2
(C) BF3
(D) Both B and C
11. : Which the following type of polymerization is used for the preparation of synthetic rubber?
(A) Cationic
(B) Ziegler-Natta
(C) Free radical
(D) Anionic
12. : Ziegler-Natta catalysts is
(A) (C₂H5)3Al/TiCl4
(B) TiCl4
(C) (C2H5)3Al
(D) (CH3)3B/TiCl2
13. : Gutta-percha is
(A) Trans-polyisoprene
(B) Cis-polyisoprene
(C) Polyethylene
(D) Polyisobutylene
14. : Which is natural polymer?
(A) Nylon-66
(B) Starch
(C) Polyester
(D) Buna-S, SBR
15. : Which is not a biodegradable polymer?
(A) Protein
(B) PVC
(C) Nucleic acid
(D) Cellulose
16. : Which is the Monomer of Nylon-6?
(A) Caprolactam
(B) Hexamethylenediamine
(C) Adipic acid
(D) All of these
17. : Monomer of Teflon is
(A) Monochloroethene
(B) 1,2-Difluoroethene
(C) Tetrafluoroethene
(D) 1,1,2-Trifluoroethene
18. : Which is strong adhesive?
(A) Melamine-formaldehyde resin
(B) Epoxy resin
(C) Alkyd resins
(D) Bakelite
19. : Which is thermoplastic?
(A) Nylon
(B) Dacron
(C) Polythene
(D) All of A, B, and C
20. : The process of vulcanization of rubber makes it
(A) Less elastic
(B) Soft
(C) Hard
(D) None of A, B, and C
21. : What type of intermolecular force is present in nylon-66?
(A) Hydrogen bond
(B) Van der Waal
(C) Dipole-dipole interactions
(D) Sulfide linkage
22. : Dacron is an example of
(A) Elastomer
(B) Thermoplastic
(C) Fiber
(D) Thermosetting polymer
23. : The monomer of natural rubber is
(A) Isoprene
(B) Butadiene
(C) Chloroprene
(D) None of A, B, and C
24. : Which polymer is prepared by addition polymerization technique?
(A) Cellulose
(B) Starch
(C) Nylon
(D) Polyethylene
25. : What types of forces are present in polymers?
(A) van der Waals forces
(B) Dipole-dipole forces
(C) H-bonding
(D) All of A, B, and C
26. : Which macromolecules are cross-linked?
(A) Polyesters
(B) Polyurethanes
(C) High density polyethylene
(D) Polyamides
27. : Which polymer is a copolymer?
(A) SBR
(B) Polystyrene
(C) PVC
(D) Polyethylene
28. : Which method gives the number-average molecular weight of a polymer?
(A) Light scattering method
(B) Sedimentation equilibrium method
(C) Osmotic method
(D) Viscosity method
29. : Which is a natural polymer?
(A) Nylon
(B) Cellulose
(C) Leucite
(D) Polystyrene
30. : Which statement is NOT true regarding the structure of DNA?
(A) It has a double helix structure
(B) There are hydrogen bonds in its structure
(C) Unlike RNA, there is no fixed ratio of bases in DNA
(D) The code for protein synthesis is given by the sequence of bases in DNA
31. : Which method does NOT give the weight-average molecular weight?
(A) Osmotic method
(B) Sedimentation velocity
(C) Light scattering
(D) Sedimentation equilibrium
32. : In the osmotic method for molecular weight determination of polymers, molecular weight can be calculated from the intercept of the
(A) π versus c graph
(B) π/c versus RT/M graph
(C) π/c versus c graph
(D) π/c versus 1/M graph
33. : A colloidal system in which both the dispersion phase and dispersed phase are liquid is called
(A) Emulsion
(B) Smoke
(C) Whipped cream
(D) Mist
34. : Which polymer is prepared by condensation polymerization technique?
(A) Polystyrene
(B) Polyethylene
(C) Starch
(D) Nylon
35. : Which compounds act as free radical initiators?
(A) Lewis acid
(B) Carbocations
(C) Peroxides
(D) High energy radiation
36. : Which compounds act as cationic initiators?
(A) Carbocations
(B) Lewis acid
(C) High energy radiation
(D) Peroxides
37. : Which compounds act as anionic initiators?
(A) Lewis acid
(B) Peroxides
(C) High energy radiation
(D) Lewis bases
38. : The polymers which do not soften by heat and pressure are called
(A) Copolymers
(B) Thermoplastics
(C) Thermosets
(D) None of A, B, and C
39. : Stereochemical configuration of a vinyl type polymer may be
(A) Syndiotactic
(B) Isotactic
(C) Atactic
(D) All of A, B, and C
40. : High density polyethylene (HDP) can be produced under normal temperature and pressure using
(A) Pt
(B) Zeigler-Natta catalyst
(C) V
(D) Ni
41. : Urea-formaldehyde resin belongs to the class of polymers called
(A) Fibers
(B) Plasticizer
(C) Thermoplastics
(D) Thermosets
42. : Polyesters belong to the class of polymers called
(A) Fibers
(B) Thermosets
(C) Thermoplastics
(D) Plasticizer
43. : PVC belongs to the class of polymers called
(A) Fibers
(B) Thermosets
(C) Plasticizer
(D) Thermoplastics
44. : A high polymer is one in which the number of repeating units is in excess of about
(A) 10
(B) 1000
(C) 100
(D) None of A, B, and C
45. : The number of repeat units in polymer backbone is called
(A) Degree of polymerization
(B) Degree of ionization
(C) Degree of dissociation
(D) None of A, B, and C
46. : The polymers which take on new shapes by application of heat and pressure are called
(A) Copolymers
(B) Thermoplastics
(C) Thermosets
(D) None of A, B, and C
47. : Soft drinks and baby feeding bottles are generally made up of
(A) Polyester
(B) Polystyrene
(C) Polyamide
(D) Polyurethane
48. : Which polymers are chlorinated?
(A) Orlon
(B) Dacron
(C) Neoprene
(D) None of these
49. : SAN is a polymer of
(A) Acrylonitrile
(B) Styrene
(C) Both A and B
(D) Vinyl chloride
50. : Bakelite is an example of
(A) Thermosetting polymer
(B) Fiber
(C) Thermoplastic
(D) Elastomer