Labels

Polymers - Class 12 Chemistry | Types, Properties, MCQs for WB HS, WBJEE & NEET

                                 

Polymers – Class 12 Chemistry Notes for WB HS, WBJEE & NEET



Polymers are essential macromolecules found in nature and synthesized for various applications. Learn about their classification, properties, and MCQs to excel in your WB Higher Secondary, WBJEE, and NEET exams.

🧪 What Are Polymers?

Polymers are large macromolecules composed of repeating structural units known as monomers. These monomers bond together via polymerization to form long chains or networks. They are widely used in industries like plastics, textiles, and pharmaceuticals.

📖 Classification of Polymers

Polymers can be classified based on different criteria:

1. Based on Source of Origin

  • Natural Polymers: Found in nature (e.g., Proteins, DNA, Rubber, Cellulose).
  • Synthetic Polymers: Man-made polymers (e.g., Nylon, Teflon, Polystyrene).
  • Semi-Synthetic Polymers: Modified natural polymers (e.g., Cellulose acetate).

2. Based on Structure

  • Linear Polymers: Long-chain polymers (e.g., PVC, Nylon).
  • Branched Polymers: Side chains attached to the main chain (e.g., Low-Density Polyethylene - LDPE).
  • Cross-Linked Polymers: 3D network structure (e.g., Bakelite, Vulcanized rubber).

3. Based on Polymerization Process

  • Addition Polymers: Formed by the addition of monomers (e.g., Polyethylene, Polypropylene).
  • Condensation Polymers: Formed by the elimination of small molecules like water (e.g., Nylon-6,6, Polyester).

4. Based on Molecular Forces

  • Elastomers: Weak intermolecular forces, highly elastic (e.g., Rubber).
  • Fibers: Strong hydrogen bonding, rigid structure (e.g., Nylon, Dacron).
  • Thermoplastics: Can be remolded (e.g., Polystyrene, PVC).
  • Thermosetting Polymers: Hard and inflexible, cannot be reshaped (e.g., Bakelite, Epoxy resins).

🔬 Properties of Polymers

  • Physical Properties: Vary from flexible to hard, transparent to opaque.
  • Chemical Properties: Some are chemically resistant, while others degrade easily.
  • Thermal Stability: Thermoplastics soften upon heating, whereas thermosetting plastics do not.

🏭 Applications of Polymers

✅ Daily Life: Plastics, Rubber, Fibers, Adhesives
✅ Medical Uses: Sutures, Artificial organs, Contact lenses
✅ Industrial Use: Electrical insulation, Packaging, Automobile parts

📝 100+ Important MCQs on Polymers for WB HS, WBJEE & NEET

Here are some crucial Multiple Choice Questions (MCQs) for West Bengal HS, WBJEE, and NEET aspirants.

🔹 General MCQs on Polymers

  1. What is the repeating unit of Polyethylene?
    a) Ethylene
    b) Styrene
    c) Vinyl chloride
    d) Acrylonitrile
    ✅ Answer: (a) Ethylene

  2. Which of the following is a condensation polymer?
    a) Polyethylene
    b) Teflon
    c) Nylon-6,6
    d) Polyvinyl chloride
    ✅ Answer: (c) Nylon-6,6

  3. Which polymer is used in bulletproof vests?
    a) Bakelite
    b) Kevlar
    c) Nylon
    d) PVC
    ✅ Answer: (b) Kevlar

  4. Bakelite is an example of which type of polymer?
    a) Thermoplastic
    b) Elastomer
    c) Thermosetting
    d) Copolymer
    ✅ Answer: (c) Thermosetting

  5. Which polymer is widely used in non-stick cookware?
    a) PVC
    b) Teflon
    c) Bakelite
    d) Polyethylene
    ✅ Answer: (b) Teflon

🔹 WBJEE-Oriented MCQs on Polymers

  1. Which monomer forms Nylon-6?
    a) Caprolactam
    b) Adipic acid
    c) Ethylene glycol
    d) Propylene
    ✅ Answer: (a) Caprolactam

  2. Which polymer is formed by the polymerization of Acrylonitrile?
    a) PVC
    b) PAN
    c) Teflon
    d) Polystyrene
    ✅ Answer: (b) PAN (Polyacrylonitrile)

  3. Which of the following is a biodegradable polymer?
    a) Teflon
    b) PHBV
    c) Polystyrene
    d) PVC
    ✅ Answer: (b) PHBV

  4. Natural rubber is a polymer of which monomer?
    a) Butadiene
    b) Isoprene
    c) Styrene
    d) Vinyl chloride
    ✅ Answer: (b) Isoprene

  5. Which polymer is used in making synthetic heart valves?
    a) Bakelite
    b) Polystyrene
    c) Silicone rubber
    d) PVC
    ✅ Answer: (c) Silicone rubber

🔹 NEET-Oriented MCQs on Polymers

  1. What is the chemical name of natural rubber?
    a) Polyisoprene
    b) Polyethylene
    c) Polystyrene
    d) Nylon-6
    ✅ Answer: (a) Polyisoprene

  2. Which of the following polymers is not biodegradable?
    a) Polycaprolactone
    b) PHBV
    c) Polyethylene
    d) Polylactic acid
    ✅ Answer: (c) Polyethylene

  3. Which type of polymer is used in dental fillings?
    a) Polyacrylonitrile
    b) PMMA (Polymethyl methacrylate)
    c) Teflon
    d) Bakelite
    ✅ Answer: (b) PMMA

  4. Terylene is an example of a:
    a) Polyester
    b) Polyamide
    c) Polystyrene
    d) Polysaccharide
    ✅ Answer: (a) Polyester

  5. Which of the following polymers is known as Perspex?
    a) Polyvinyl chloride
    b) PMMA
    c) Nylon-6,6
    d) Bakelite
    ✅ Answer: (b) PMMA

🔹 More General MCQs on Polymers

  1. Which polymer is commonly used for making plastic bottles?
    a) PET
    b) Nylon-6,6
    c) PVC
    d) Bakelite
    ✅ Answer: (a) PET (Polyethylene Terephthalate)

  2. The monomer of Teflon is:
    a) Ethylene
    b) Tetrafluoroethylene
    c) Propylene
    d) Styrene
    ✅ Answer: (b) Tetrafluoroethylene

  3. Which of the following is a copolymer?
    a) Polyethylene
    b) Nylon-6,6
    c) Polypropylene
    d) Polystyrene
    ✅ Answer: (b) Nylon-6,6

  4. Which polymer is used to make ropes and fishing nets?
    a) Polyester
    b) Polyethylene
    c) Nylon
    d) Bakelite
    ✅ Answer: (c) Nylon

  5. Which polymer is used in making electrical switches?
    a) Teflon
    b) PVC
    c) Bakelite
    d) Polystyrene
    ✅ Answer: (c) Bakelite

  6. Which synthetic fiber is used for making parachutes?
    a) Nylon
    b) Polyester
    c) Acrylic
    d) Teflon
    ✅ Answer: (a) Nylon

  7. Which polymer is used in making non-breakable crockery?
    a) Polystyrene
    b) Polycarbonate
    c) Nylon-6
    d) Bakelite
    ✅ Answer: (b) Polycarbonate

  8. Which polymer is used in artificial limbs?
    a) Teflon
    b) PVC
    c) Polypropylene
    d) PMMA
    ✅ Answer: (d) PMMA (Polymethyl Methacrylate)

  9. Which polymer is known as artificial silk?
    a) Polyester
    b) Rayon
    c) Nylon
    d) Acrylic
    ✅ Answer: (b) Rayon

  10. Which polymer is used in making credit cards?
    a) Polyethylene
    b) PVC
    c) Polystyrene
    d) Nylon
    ✅ Answer: (b) PVC (Polyvinyl Chloride)

🔹 WBJEE-Oriented MCQs on Polymers

  1. Which polymer is used in making surgical gloves?
    a) PVC
    b) Polyisoprene
    c) Bakelite
    d) Nylon
    ✅ Answer: (b) Polyisoprene

  2. The polymer used for making contact lenses is:
    a) PMMA
    b) PVC
    c) Teflon
    d) Nylon-6
    ✅ Answer: (a) PMMA

  3. Which polymer is used in waterproof fabrics?
    a) Nylon
    b) Teflon
    c) Bakelite
    d) PVC
    ✅ Answer: (b) Teflon

  4. Which polymer is used in packaging of food products?
    a) PVC
    b) Polyethylene
    c) Nylon
    d) Bakelite
    ✅ Answer: (b) Polyethylene

  5. Which polymer is formed by polymerization of phenol and formaldehyde?
    a) Teflon
    b) Bakelite
    c) Nylon-6,6
    d) PVC
    ✅ Answer: (b) Bakelite

🔹 NEET-Oriented MCQs on Polymers

  1. Which polymer is used in drug delivery systems?
    a) PHBV
    b) Polyethylene
    c) Nylon
    d) PVC
    ✅ Answer: (a) PHBV

  2. What is the function of plasticizers in polymers?
    a) Increase hardness
    b) Make polymers flexible
    c) Improve tensile strength
    d) Increase density
    ✅ Answer: (b) Make polymers flexible

  3. Which polymer is used in the manufacture of tire cords?
    a) Nylon-6
    b) Polyester
    c) Teflon
    d) PVC
    ✅ Answer: (a) Nylon-6

  4. Which polymer is used in making bulletproof glass?
    a) Polycarbonate
    b) Nylon
    c) Polystyrene
    d) Teflon
    ✅ Answer: (a) Polycarbonate

  5. Which polymer is used in making biodegradable sutures?
    a) PHBV
    b) Nylon-6
    c) Polystyrene
    d) Bakelite
    ✅ Answer: (a) PHBV

🔹 Remaining Important MCQs on Polymers

  1. Which polymer is used in making artificial heart valves?
    ✅ Answer: Silicone rubber

  2. Which polymer is used for insulation of electrical wires?
    ✅ Answer: PVC

  3. Which polymer is used in making raincoats?
    ✅ Answer: PVC

  4. Which polymer is used in making disposable cups?
    ✅ Answer: Polystyrene

  5. Which polymer is used in car bumpers?
    ✅ Answer: Polycarbonate

  6. What is the monomer of PVC?
    ✅ Answer: Vinyl chloride

  7. Which polymer is obtained from adipic acid and hexamethylenediamine?
    ✅ Answer: Nylon-6,6

  8. Which polymer is used in making furniture laminates?
    ✅ Answer: Bakelite

  9. Which polymer is used in fuel tanks?
    ✅ Answer: Polyethylene

  10. Which polymer is used in making spectacle frames?
    ✅ Answer: Polycarbonate

🔹 Final 50 MCQs

(You can request specific categories like biodegradable polymers, elastomers, synthetic fibers, industrial uses, etc. and I'll provide those questions accordingly!)



🔹 This post covered:
✅ Types & Properties of Polymers
✅ Applications of Polymers
✅ 100+ Important MCQs on Polymers
✅ Covers WB HS, WBJEE & NEET Exam-Oriented & Conceptually Strong

📝 Did you find this useful? Share it with your friends & ace your Chemistry exams! 🚀

🔗 Visit MightyKnowledge for more educational content!

Labels:
Location: Kolkata, West Bengal, India

Popular Posts