Here below some basic MCQ’s about “Polymers and polymerization” with answer which is explained in details. Let’s check one by one which is given below.
1. Which of the following is an example of a natural polymer?
- a) Polyethylene
- b) Nylon-6,6
- c) DNA
- d) Polystyrene
Answer: c) DNA
Explanation: DNA is a natural polymer made up of nucleotide monomers. Polyethylene and polystyrene are synthetic polymers, while Nylon-6,6 is an example of a synthetic polyamide.
2. Bakelite is an example of which type of polymer?
- a) Thermoplastic polymer
- b) Thermosetting polymer
- c) Elastomer
- d) Addition polymer
Answer: b) Thermosetting polymer
Explanation: Bakelite is a thermosetting polymer, which means it hardens irreversibly when heated. It cannot be remelted or reshaped after the initial setting.
3. Which of the following is an addition polymer?
- a) Teflon
- b) Nylon-6,6
- c) Polyester
- d) Bakelite
Answer: a) Teflon
Explanation: Teflon (polytetrafluoroethylene) is an addition polymer, formed by the polymerization of tetrafluoroethylene monomers without the elimination of any by-products.
4. Which of the following polymers is an example of a condensation polymer?
- a) Polyvinyl chloride (PVC)
- b) Teflon
- c) Nylon-6,6
- d) Polyethylene
Answer: c) Nylon-6,6
Explanation: Nylon-6,6 is a condensation polymer formed by the reaction of hexamethylene diamine and adipic acid, where a molecule of water is eliminated during the polymerization process.
5. The process by which monomers add together to form a polymer without the elimination of any by-products is called:
- a) Condensation polymerization
- b) Addition polymerization
- c) Copolymerization
- d) Cross-linking
Answer: b) Addition polymerization
Explanation: In addition polymerization, monomers combine to form a polymer without the loss of any atoms or molecules. This is typical of polymers like polyethylene and polypropylene.
6. Which of the following is a synthetic polymer?
- a) Wool
- b) Silk
- c) Polyethylene
- d) Cellulose
Answer: c) Polyethylene
Explanation: Polyethylene is a synthetic polymer made from ethylene monomers through the process of addition polymerization. Wool, silk, and cellulose are examples of natural polymers.
7. Which of the following is an elastomer?
- a) Bakelite
- b) Natural rubber
- c) PVC
- d) Polyester
Answer: b) Natural rubber
Explanation: Natural rubber is an elastomer, which means it can be stretched and will return to its original shape when the stretching force is removed. Elastomers have elasticity and flexibility.
8. In which type of polymerization are water molecules eliminated during the formation of the polymer?
- a) Addition polymerization
- b) Condensation polymerization
- c) Free radical polymerization
- d) Coordination polymerization
Answer: b) Condensation polymerization
Explanation: In condensation polymerization, monomers react together with the elimination of small molecules such as water, ammonia, or hydrogen chloride. This occurs in the synthesis of polymers like Nylon-6,6 and polyesters.
9. Which of the following polymers is used to make non-stick cookware?
- a) PVC
- b) Bakelite
- c) Teflon
- d) Polystyrene
Answer: c) Teflon
Explanation: Teflon, or polytetrafluoroethylene (PTFE), is a polymer known for its non-stick properties and is commonly used in cookware coatings.
10. Which of the following is an example of a copolymer?
- a) Nylon-6
- b) Styrene-butadiene rubber (SBR)
- c) Polyethylene
- d) Polystyrene
Answer: b) Styrene-butadiene rubber (SBR)
Explanation: A copolymer is made from two or more different monomers. Styrene-butadiene rubber (SBR) is a copolymer of styrene and butadiene, commonly used in tire manufacturing.
11. Which of the following is a biodegradable polymer?
- a) Polyvinyl chloride (PVC)
- b) Polythene
- c) Polyhydroxybutyrate (PHB)
- d) Polystyrene
Answer: c) Polyhydroxybutyrate (PHB)
Explanation: PHB is a biodegradable polymer produced by microorganisms. It is a biopolymer that decomposes naturally, unlike synthetic polymers like PVC or polythene.
12. Which of the following monomers is used in the manufacture of Buna-S rubber?
- a) Ethylene and propylene
- b) Butadiene and styrene
- c) Acrylonitrile and butadiene
- d) Isoprene and isobutylene
Answer: b) Butadiene and styrene
Explanation: Buna-S is a copolymer made from the polymerization of butadiene and styrene. It is a synthetic rubber widely used in the production of tires.
13. Which of the following is a step-growth polymerization process?
- a) Polymerization of ethene to polyethylene
- b) Formation of Nylon-6,6
- c) Polymerization of styrene
- d) Polymerization of vinyl chloride
Answer: b) Formation of Nylon-6,6
Explanation: Step-growth polymerization involves the reaction of bifunctional or multifunctional monomers, such as hexamethylene diamine and adipic acid, to form polymers like Nylon-6,6.
14. Which of the following is a thermoplastic polymer?
- a) Bakelite
- b) Polyethylene
- c) Vulcanized rubber
- d) Melamine
Answer: b) Polyethylene
Explanation: Polyethylene is a thermoplastic, meaning it can be melted and reshaped multiple times. Bakelite and melamine are thermosetting polymers, while vulcanized rubber is an elastomer.
15. Low-density polyethylene (LDPE) differs from high-density polyethylene (HDPE) in:
- a) Melting point
- b) Flexibility
- c) Degree of branching
- d) All of the above
Answer: d) All of the above
Explanation: LDPE has a lower melting point, higher flexibility, and a more branched structure than HDPE, which has a more linear structure and is denser.
16. Which polymer is commonly used in the manufacturing of plastic bottles and containers?
- a) Polyvinyl chloride (PVC)
- b) Polyethylene terephthalate (PET)
- c) Polystyrene
- d) Nylon
Answer: b) Polyethylene terephthalate (PET)
Explanation: PET is widely used in the production of plastic bottles, containers, and packaging materials due to its strength, transparency, and recyclability.
17. Which of the following statements about vulcanization is correct?
- a) It increases the elasticity of rubber.
- b) It involves the addition of chlorine.
- c) It increases the solubility of rubber in organic solvents.
- d) It converts rubber into a thermoplastic polymer.
Answer: a) It increases the elasticity of rubber.
Explanation: Vulcanization involves heating rubber with sulfur to form cross-links between polymer chains, enhancing elasticity, durability, and heat resistance.
18. Polystyrene is prepared by the polymerization of:
- a) Ethylene
- b) Propylene
- c) Styrene
- d) Vinyl chloride
Answer: c) Styrene
Explanation: Polystyrene is formed by the polymerization of styrene monomers through an addition polymerization process.
19. Which of the following is not a step in free radical polymerization?
- a) Initiation
- b) Propagation
- c) Termination
- d) Hydrolysis
Answer: d) Hydrolysis
Explanation: Free radical polymerization involves three main steps: initiation, propagation, and termination. Hydrolysis is not involved in this type of polymerization.
20. The polymer obtained from the copolymerization of styrene and acrylonitrile is called:
- a) SBR
- b) Polyacrylonitrile
- c) SAN
- d) ABS
Answer: c) SAN
Explanation: SAN is a copolymer of styrene and acrylonitrile. It is used in the production of plastic products due to its durability and strength.
21. Which polymer is used in the production of textile fibers?
- a) Polyvinyl chloride
- b) Polytetrafluoroethylene
- c) Nylon-6
- d) Polypropylene
Answer: c) Nylon-6
Explanation: Nylon-6 is commonly used in the production of synthetic fibers for textiles due to its strength, elasticity, and resistance to abrasion.
22. Which of the following is a thermosetting plastic?
- a) Polyethylene
- b) Bakelite
- c) Polypropylene
- d) Polystyrene
Answer: b) Bakelite
Explanation: Bakelite is a thermosetting plastic, meaning once it has been molded and set, it cannot be remelted. It is often used in electrical insulators and kitchenware.
23. Which polymer is formed by the polymerization of caprolactam?
- a) Nylon-6
- b) Nylon-6,6
- c) Kevlar
- d) Dacron
Answer: a) Nylon-6
Explanation: Nylon-6 is formed by the ring-opening polymerization of caprolactam, which results in a linear polyamide used in fibers and plastics.
24. Which type of polymerization involves the loss of small molecules like water or methanol?
- a) Addition polymerization
- b) Condensation polymerization
- c) Free radical polymerization
- d) Chain-growth polymerization
Answer: b) Condensation polymerization
Explanation: Condensation polymerization involves the combination of monomers with the elimination of small molecules like water, methanol, or hydrogen chloride, as seen in the formation of polyamides or polyesters.
25. Which polymer is used for making flexible hoses and insulating cables?
- a) Polyethylene
- b) PVC
- c) Bakelite
- d) Polyester
Answer: b) PVC
Explanation: Polyvinyl chloride (PVC) is used to make flexible hoses, electrical cable insulation, and pipes due to its durability, flexibility, and resistance to environmental degradation.
26. Which of the following is a biopolymer?
- a) Polythene
- b) Polyacrylonitrile
- c) Polylactic acid (PLA)
- d) Polystyrene
Answer: c) Polylactic acid (PLA)
Explanation: Polylactic acid (PLA) is a biopolymer made from renewable resources like corn starch or sugarcane. It is biodegradable and used in packaging and medical implants.
27. Which of the following monomers is used in the manufacture of Teflon?
- a) Vinyl chloride
- b) Ethylene
- c) Tetrafluoroethylene
- d) Propylene
Answer: c) Tetrafluoroethylene
Explanation: Teflon is formed by the polymerization of tetrafluoroethylene. It is known for its non-stick properties and chemical resistance.
28. Which of the following is an example of a homopolymer?
- a) Nylon-6,6
- b) Polyethylene
- c) Styrene-butadiene rubber
- d) Polyester
Answer: b) Polyethylene
Explanation: A homopolymer is made from only one type of monomer. Polyethylene is formed by the polymerization of ethylene monomers, making it a homopolymer.
29. Which of the following is a synthetic fiber?
- a) Silk
- b) Wool
- c) Nylon
- d) Cotton
Answer: c) Nylon
Explanation: Nylon is a synthetic fiber made from polyamides, while silk, wool, and cotton are natural fibers.
30. Which of the following polymers is used to make bulletproof vests?
- a) Nylon-6
- b) Kevlar
- c) Polyethylene
- d) Bakelite
Answer: b) Kevlar
Explanation: Kevlar is a strong, lightweight polymer that has high tensile strength, making it suitable for use in bulletproof vests and other protective gear.
31. Which of the following is a condensation polymer?
- a) Polypropylene
- b) Polyethylene
- c) Dacron
- d) Polystyrene
Answer: c) Dacron
Explanation: Dacron is a polyester formed by condensation polymerization of ethylene glycol and terephthalic acid, with water as the by-product.
32. Which of the following is an example of an elastomer?
- a) Polystyrene
- b) Polyethylene
- c) Buna-N
- d) Bakelite
Answer: c) Buna-N
Explanation: Buna-N is an elastomer made from copolymerization of butadiene and acrylonitrile, commonly used in making rubber materials such as gaskets and seals.
33. The monomer of natural rubber is:
- a) Isoprene
- b) Ethylene
- c) Propylene
- d) Vinyl chloride
Answer: a) Isoprene
Explanation: Natural rubber is a polymer of isoprene (2-methyl-1,3-butadiene), which undergoes polymerization to form long chains of polyisoprene.
34. The polymer commonly used to manufacture non-stick cookware is:
- a) Polyethylene
- b) Polystyrene
- c) Teflon
- d) PVC
Answer: c) Teflon
Explanation: Teflon (polytetrafluoroethylene) is used in non-stick cookware because of its high heat resistance and non-reactive, slippery surface.
35. Which of the following is a synthetic polymer?
- a) Cellulose
- b) Silk
- c) Nylon-6,6
- d) Rubber
Answer: c) Nylon-6,6
Explanation: Nylon-6,6 is a synthetic polymer, produced by condensation polymerization of hexamethylene diamine and adipic acid.
36. Which polymer is formed by the polymerization of ethylene glycol and terephthalic acid?
- a) Nylon-6,6
- b) Dacron
- c) Polyethylene
- d) Polystyrene
Answer: b) Dacron
Explanation: Dacron is a polyester formed by the condensation polymerization of ethylene glycol and terephthalic acid.
37. Which of the following polymers is formed by step-growth polymerization?
- a) Polystyrene
- b) Polyethylene
- c) Nylon-6,6
- d) PVC
Answer: c) Nylon-6,6
Explanation: Nylon-6,6 is produced via step-growth polymerization, involving the combination of hexamethylene diamine and adipic acid.
38. Which of the following is a copolymer?
- a) Polyethylene
- b) Polystyrene
- c) Nylon-6,6
- d) Buna-S
Answer: d) Buna-S
Explanation: Buna-S is a copolymer made from butadiene and styrene, widely used in the rubber industry, especially for tires.
39. Which polymer is used to make PET bottles?
- a) Polyethylene
- b) Polyvinyl chloride
- c) Polyethylene terephthalate
- d) Polystyrene
Answer: c) Polyethylene terephthalate
Explanation: Polyethylene terephthalate (PET) is widely used in making plastic bottles and containers due to its strength and lightweight nature.
40. Which polymer is widely used in electrical insulation?
- a) Bakelite
- b) PVC
- c) Polyethylene
- d) Polystyrene
Answer: b) PVC
Explanation: PVC (Polyvinyl chloride) is commonly used for electrical insulation because of its excellent insulating properties and durability.
41. Which of the following polymers is an addition polymer?
- a) Dacron
- b) Nylon-6,6
- c) Polystyrene
- d) Bakelite
Answer: c) Polystyrene
Explanation: Polystyrene is formed by the addition polymerization of styrene monomers, without the elimination of any by-products.
42. Which of the following statements is correct about thermoplastic polymers?
- a) They cannot be remolded once set.
- b) They soften on heating and harden on cooling.
- c) They form extensive cross-links.
- d) They are used for electrical insulators.
Answer: b) They soften on heating and harden on cooling.
Explanation: Thermoplastic polymers can be softened by heating and reshaped repeatedly, unlike thermosetting polymers which harden permanently after setting.
43. The polymer used in bulletproof materials is:
- a) PVC
- b) Nylon-6
- c) Kevlar
- d) Teflon
Answer: c) Kevlar
Explanation: Kevlar is a high-strength polymer used in bulletproof vests due to its exceptional strength-to-weight ratio and durability.
44. The polymerization of vinyl chloride gives:
- a) Polyvinyl chloride
- b) Polyethylene
- c) Polystyrene
- d) Polypropylene
Answer: a) Polyvinyl chloride
Explanation: Polyvinyl chloride (PVC) is produced by the polymerization of vinyl chloride monomers through an addition polymerization process.
45. Which of the following is a characteristic of thermosetting polymers?
- a) They can be softened by heating.
- b) They have a linear structure.
- c) They form extensive cross-linking on heating.
- d) They are flexible.
Answer: c) They form extensive cross-linking on heating.
Explanation: Thermosetting polymers undergo cross-linking when heated, which makes them rigid and heat-resistant. Once set, they cannot be reshaped.
46. Which of the following is a natural polymer?
- a) Bakelite
- b) Cellulose
- c) Nylon-6
- d) Polyvinyl chloride
Answer: b) Cellulose
Explanation: Cellulose is a natural polymer made of glucose monomers. It is found in the cell walls of plants and is the most abundant organic polymer on Earth.
47. Which polymer is used to make fabrics for clothing?
- a) Polyvinyl chloride
- b) Polyester
- c) Bakelite
- d) Polystyrene
Answer: b) Polyester
Explanation: Polyester is a synthetic polymer used to make fabrics for clothing because of its durability, strength, and resistance to shrinking and wrinkling.
48. Which of the following is a biodegradable polymer?
- a) Polystyrene
- b) Polypropylene
- c) Polyhydroxybutyrate (PHB)
- d) Polyvinyl chloride
Answer: c) Polyhydroxybutyrate (PHB)
Explanation: PHB is a biodegradable polymer produced by bacteria. It is used in medical applications and packaging, where biodegradability is important.
49. Which polymer is produced by the polymerization of acrylonitrile?
- a) Nylon
- b) PVC
- c) Polyacrylonitrile (PAN)
- d) Polypropylene
Answer: c) Polyacrylonitrile (PAN)
Explanation: Polyacrylonitrile is a polymer produced by the polymerization of acrylonitrile. It is used in the production of fibers like acrylics.
50. Which polymer is used to make lightweight and strong packaging materials?
- a) Bakelite
- b) Polyethylene
- c) Kevlar
- d) Nylon
Answer: b) Polyethylene
Explanation: Polyethylene is widely used in packaging materials due to its light weight, strength, and flexibility. It is commonly used in plastic bags and containers.
51. Which of the following is a thermoplastic polymer?
- a) Bakelite
- b) Melamine
- c) PVC
- d) Vulcanized rubber
Answer: c) PVC
Explanation: PVC (Polyvinyl chloride) is a thermoplastic polymer that can be reshaped when heated and solidified when cooled. It is used in pipes, cables, and flooring.
52. Which polymer is formed by the polymerization of isoprene?
- a) Natural rubber
- b) Polystyrene
- c) Polyvinyl chloride
- d) Nylon-6,6
Answer: a) Natural rubber
Explanation: Natural rubber is a polymer of isoprene. It is an elastomer, which exhibits high elasticity.
53. Which of the following polymers is prepared by addition polymerization?
- a) Polyester
- b) Nylon-6,6
- c) Polystyrene
- d) Bakelite
Answer: c) Polystyrene
Explanation: Polystyrene is an addition polymer formed from the polymerization of styrene monomers.
54. Which polymer is used to make lightweight plastic bags?
- a) Polystyrene
- b) Polyethylene
- c) Nylon
- d) Polypropylene
Answer: b) Polyethylene
Explanation: Polyethylene is commonly used for lightweight plastic bags due to its flexibility and low cost.
55. Which of the following polymers is used to make paints and coatings?
- a) Polyurethane
- b) Polyvinyl chloride
- c) Polystyrene
- d) Polyethylene
Answer: a) Polyurethane
Explanation: Polyurethane is used in making paints, varnishes, and coatings because of its durability and resistance to wear.
56. Which of the following is a copolymer?
- a) Polypropylene
- b) Polystyrene
- c) Nylon-6,6
- d) Bakelite
Answer: c) Nylon-6,6
Explanation: Nylon-6,6 is a copolymer formed from two different monomers: hexamethylene diamine and adipic acid.
57. Which of the following is a synthetic rubber?
- a) Polyvinyl chloride
- b) Buna-S
- c) Polyester
- d) Nylon
Answer: b) Buna-S
Explanation: Buna-S is a synthetic rubber made from the copolymerization of butadiene and styrene. It is widely used in tire manufacturing.
58. The polymerization of which monomer results in Teflon?
- a) Ethylene
- b) Tetrafluoroethylene
- c) Styrene
- d) Vinyl chloride
Answer: b) Tetrafluoroethylene
Explanation: Teflon is a polymer of tetrafluoroethylene, known for its non-stick properties and resistance to heat and chemicals.
59. Which of the following is a step-growth polymer?
- a) Polyethylene
- b) Polyester
- c) Polystyrene
- d) Polyvinyl chloride
Answer: b) Polyester
Explanation: Polyester is a step-growth polymer produced by the condensation reaction between a diacid and a diol, with water as a by-product.
60. Which polymer is produced by the polymerization of acrylonitrile?
- a) Polyethylene
- b) Polyacrylonitrile
- c) Polystyrene
- d) Nylon-6,6
Answer: b) Polyacrylonitrile
Explanation: Polyacrylonitrile (PAN) is produced by the polymerization of acrylonitrile and is used in the manufacture of synthetic fibers.
61. Which of the following polymers is commonly used in the production of textiles?
- a) Polyvinyl chloride
- b) Polyethylene
- c) Nylon
- d) Polystyrene
Answer: c) Nylon
Explanation: Nylon is a synthetic fiber used widely in the textile industry due to its strength, durability, and elasticity.
62. Which polymer is used in the production of disposable cups and food containers?
- a) Polyvinyl chloride
- b) Polystyrene
- c) Polypropylene
- d) Polyethylene
Answer: b) Polystyrene
Explanation: Polystyrene is used in the production of disposable cups, plates, and food containers due to its lightweight and rigid properties.
63. Which of the following polymers is used in making fibers for ropes and textiles?
- a) Polypropylene
- b) Polyethylene
- c) Polyester
- d) Polystyrene
Answer: c) Polyester
Explanation: Polyester fibers are widely used in textiles and for making ropes due to their strength, durability, and resistance to shrinkage.
64. Which of the following is a thermosetting polymer?
- a) Polyethylene
- b) Polystyrene
- c) Bakelite
- d) Nylon
Answer: c) Bakelite
Explanation: Bakelite is a thermosetting polymer that hardens permanently after being molded. It is widely used in electrical insulators and kitchenware.
65. Which polymer is used to manufacture water pipes?
- a) Polystyrene
- b) Polyvinyl chloride (PVC)
- c) Nylon-6
- d) Polyethylene
Answer: b) Polyvinyl chloride (PVC)
Explanation: PVC is widely used in the manufacturing of water pipes because of its chemical resistance, durability, and low cost.
66. The polymer used to make parachutes and ropes for mountain climbing is:
- a) Polyethylene
- b) Kevlar
- c) Polypropylene
- d) Bakelite
Answer: b) Kevlar
Explanation: Kevlar is an extremely strong polymer used in making parachutes, ropes for mountain climbing, and bulletproof vests due to its high tensile strength.
67. Which of the following polymers is a biodegradable polymer?
- a) Polyethylene
- b) Polystyrene
- c) Polyhydroxybutyrate (PHB)
- d) Polyvinyl chloride
Answer: c) Polyhydroxybutyrate (PHB)
Explanation: PHB is a biodegradable polymer produced by microorganisms. It is used in medical applications and packaging due to its ability to degrade naturally.
68. Which polymer is used in making non-stick coatings for cookware?
- a) Polypropylene
- b) Polyvinyl chloride
- c) Teflon
- d) Polystyrene
Answer: c) Teflon
Explanation: Teflon is used for non-stick coatings due to its high heat resistance and non-reactive surface, making it ideal for cookware.
69. Which of the following is a characteristic of thermosetting polymers?
- a) They soften on heating.
- b) They can be reshaped repeatedly.
- c) They form extensive cross-links.
- d) They have a linear structure.
Answer: c) They form extensive cross-links.
Explanation: Thermosetting polymers form extensive cross-links when heated, resulting in a rigid structure that cannot be remolded or reshaped after setting.
70. Which of the following is a natural polymer?
- a) Polystyrene
- b) Nylon
- c) Cellulose
- d) Polyethylene
Answer: c) Cellulose
Explanation: Cellulose is a natural polymer found in the cell walls of plants. It is composed of glucose units and is the most abundant organic compound on Earth.
71. Which polymer is used to make strong, shatterproof lenses and windows?
- a) Polycarbonate
- b) Polystyrene
- c) Nylon-6
- d) Polyethylene
Answer: a) Polycarbonate
Explanation: Polycarbonate is used to make strong, impact-resistant lenses and windows due to its toughness and transparency.
72. Which of the following is an elastomer?
- a) Polyethylene
- b) Vulcanized rubber
- c) Bakelite
- d) Polystyrene
Answer: b) Vulcanized rubber
Explanation: Vulcanized rubber is an elastomer that has improved elasticity and strength due to the process of vulcanization, where sulfur is added to form cross-links between polymer chains.
73. Which polymer is used for packaging materials due to its flexibility and strength?
- a) Polyethylene
- b) Bakelite
- c) Kevlar
- d) Nylon
Answer: a) Polyethylene
Explanation: Polyethylene is used in packaging materials like plastic bags and bottles because of its flexibility, strength, and resistance to moisture.
74. Which of the following is an example of a condensation polymer?
- a) Polyethylene
- b) Nylon-6
- c) Polypropylene
- d) Polystyrene
Answer: b) Nylon-6
Explanation: Nylon-6 is a condensation polymer formed by the polymerization of caprolactam. Water is released during the polymerization process.
75. Which of the following is a synthetic biodegradable polymer?
- a) Polystyrene
- b) Polypropylene
- c) PHBV (Polyhydroxybutyrate-co-valerate)
- d) Nylon-6,6
Answer: c) PHBV (Polyhydroxybutyrate-co-valerate)
Explanation: PHBV is a biodegradable copolymer, used in packaging and medical implants. It breaks down naturally in the environment.
76. Which polymer is commonly used to make artificial joints and implants?
- a) Polyvinyl chloride
- b) Nylon-6
- c) Teflon
- d) High-density polyethylene (HDPE)
Answer: d) High-density polyethylene (HDPE)
Explanation: HDPE is used in making artificial joints and medical implants due to its strength, chemical resistance, and biocompatibility.
77. Which of the following polymers is formed by addition polymerization?
- a) Nylon-6,6
- b) Bakelite
- c) Polyvinyl chloride
- d) Dacron
Answer: c) Polyvinyl chloride
Explanation: Polyvinyl chloride (PVC) is formed by the addition polymerization of vinyl chloride monomers.
78. Which polymer is used to manufacture lightweight, high-strength materials for aerospace applications?
- a) Polyethylene
- b) Bakelite
- c) Kevlar
- d) Polypropylene
Answer: c) Kevlar
Explanation: Kevlar is used in aerospace applications due to its high tensile strength, lightweight nature, and resistance to heat.
79. Which of the following is a thermoplastic polymer?
- a) Bakelite
- b) Vulcanized rubber
- c) Polystyrene
- d) Epoxy resin
Answer: c) Polystyrene
Explanation: Polystyrene is a thermoplastic polymer that can be softened and reshaped upon heating.
80. Which polymer is formed by the polymerization of butadiene and acrylonitrile?
- a) Neoprene
- b) Buna-N
- c) PVC
- d) Nylon-6
Answer: b) Buna-N
Explanation: Buna-N is a copolymer of butadiene and acrylonitrile, used in making synthetic rubber with good resistance to oil and chemicals.
81. Which polymer is commonly used in the manufacture of toys, containers, and furniture?
- a) Polystyrene
- b) Polyethylene
- c) Nylon-6,6
- d) Polypropylene
Answer: d) Polypropylene
Explanation: Polypropylene is widely used for making toys, containers, and furniture because of its toughness, flexibility, and low cost.
82. Which polymer is used to make contact lenses and dental fillings?
- a) Polyethylene
- b) Polycarbonate
- c) Poly(methyl methacrylate) (PMMA)
- d) Polystyrene
Answer: c) Poly(methyl methacrylate) (PMMA)
Explanation: PMMA is a transparent and rigid polymer, used in contact lenses, dental fillings, and transparent barriers due to its optical clarity and biocompatibility.
83. Which of the following polymers has excellent insulating properties and is used in electrical wiring?
- a) Bakelite
- b) Nylon
- c) Polyvinyl chloride
- d) Polystyrene
Answer: c) Polyvinyl chloride
Explanation: PVC is widely used as an electrical insulator in wiring due to its high insulating properties, durability, and flame resistance.
84. Which of the following is an elastomeric polymer?
- a) Polypropylene
- b) Neoprene
- c) Bakelite
- d) Nylon-6
Answer: b) Neoprene
Explanation: Neoprene is an elastomeric polymer, commonly used for making wetsuits, hoses, and gaskets because of its elasticity, weather resistance, and chemical stability.
85. Which of the following polymers is commonly used in 3D printing?
- a) Polyethylene
- b) Polylactic acid (PLA)
- c) Nylon-6
- d) Bakelite
Answer: b) Polylactic acid (PLA)
Explanation: PLA is a biodegradable polymer used in 3D printing due to its ease of use, environmental friendliness, and ability to form precise shapes.
86. Which of the following is a biodegradable polymer?
- a) Polyvinyl chloride
- b) Polystyrene
- c) Poly(lactic-co-glycolic acid) (PLGA)
- d) Polyethylene
Answer: c) Poly(lactic-co-glycolic acid) (PLGA)
Explanation: PLGA is a biodegradable polymer used in medical applications like drug delivery and tissue engineering due to its biocompatibility and ability to degrade in the body.
87. Which polymer is known for its heat-resistant and electrical insulating properties, used in electronics?
- a) Bakelite
- b) Polypropylene
- c) Teflon
- d) Nylon-6
Answer: a) Bakelite
Explanation: Bakelite is known for its excellent heat resistance and electrical insulating properties, making it ideal for use in electrical switches, sockets, and electronics.
88. Which polymer is commonly used in the food packaging industry due to its moisture barrier properties?
- a) Polystyrene
- b) Polyvinyl chloride
- c) Polyethylene
- d) Polypropylene
Answer: c) Polyethylene
Explanation: Polyethylene is used in food packaging, such as plastic wraps and containers, because of its excellent moisture barrier properties and flexibility.
89. Which of the following polymers is used in making flexible tubes and pipes?
- a) Polyethylene
- b) Polystyrene
- c) Bakelite
- d) Polyurethane
Answer: d) Polyurethane
Explanation: Polyurethane is used in making flexible tubes and pipes due to its flexibility, durability, and resistance to chemicals.
90. Which of the following polymers is used to manufacture bulletproof vests and helmets?
- a) Polyethylene
- b) Polyvinyl chloride
- c) Kevlar
- d) Polystyrene
Answer: c) Kevlar
Explanation: Kevlar is a high-strength polymer used in the manufacture of bulletproof vests and helmets because of its high tensile strength and durability.
91. Which of the following is a polymer of tetrafluoroethylene?
- a) Nylon-6
- b) Polyvinyl chloride
- c) Teflon
- d) Polypropylene
Answer: c) Teflon
Explanation: Teflon is a polymer of tetrafluoroethylene, known for its non-stick properties and resistance to high temperatures and chemicals.
92. Which polymer is used in making artificial silk?
- a) Rayon
- b) Nylon-6,6
- c) Polyester
- d) Polyethylene
Answer: a) Rayon
Explanation: Rayon is a semi-synthetic polymer used in making artificial silk. It is derived from cellulose and has a silky appearance and texture.
93. Which polymer is used to make packaging foams and insulation materials?
- a) Polypropylene
- b) Polystyrene
- c) Nylon
- d) Polyethylene
Answer: b) Polystyrene
Explanation: Polystyrene is commonly used in making packaging foams, insulation materials, and disposable cups due to its lightweight and insulating properties.
94. Which of the following polymers is a copolymer?
- a) Nylon-6
- b) Buna-S
- c) Polystyrene
- d) Polyvinyl chloride
Answer: b) Buna-S
Explanation: Buna-S is a copolymer of butadiene and styrene, used in making synthetic rubber with good abrasion resistance and durability.
95. Which of the following is a polyamide polymer?
- a) Polyethylene
- b) Nylon
- c) Polystyrene
- d) Polyvinyl chloride
Answer: b) Nylon
Explanation: Nylon is a polyamide polymer formed by the condensation polymerization of diamines and dicarboxylic acids.
96. Which of the following polymers is used in making carpets and rugs?
- a) Nylon-6
- b) Polyethylene
- c) Polystyrene
- d) Bakelite
Answer: a) Nylon-6
Explanation: Nylon-6 is commonly used in making carpets, rugs, and textiles due to its durability, resistance to wear, and ability to be dyed in various colors.
97. Which polymer is used for making bottles for carbonated beverages?
- a) Polyethylene
- b) Polystyrene
- c) Polyethylene terephthalate (PET)
- d) Polypropylene
Answer: c) Polyethylene terephthalate (PET)
Explanation: PET is used to make bottles for carbonated beverages due to its strength, transparency, and gas barrier properties.
98. Which of the following is a biodegradable synthetic polymer used in medical sutures?
- a) Polyvinyl chloride
- b) Poly(lactic acid) (PLA)
- c) Nylon-6
- d) Polyethylene
Answer: b) Poly(lactic acid) (PLA)
Explanation: PLA is a biodegradable synthetic polymer used in medical sutures due to its biocompatibility and ability to degrade in the body over time.
99. Which of the following polymers is used in making garden hoses and raincoats?
- a) Polyethylene
- b) Polyurethane
- c) Bakelite
- d) Polyvinyl chloride
Answer: d) Polyvinyl chloride
Explanation: PVC is used in making garden hoses and raincoats because of its flexibility, durability, and water resistance.
100. Which polymer is used in making CDs and DVDs?
- a) Polycarbonate
- b) Polystyrene
- c) Nylon-6,6
- d) Polyvinyl chloride
Answer: a) Polycarbonate
Explanation: Polycarbonate is used in making CDs and DVDs because of its strength, durability, and optical clarity.
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