Q.1 Which of the following is a natural polymer?
Nylon
Cellulose
Teflon
Polyethylene
Explanation - Cellulose is a natural polymer found in the cell walls of plants. Nylon, Teflon, and polyethylene are synthetic polymers.
Correct answer is: Cellulose
Q.2 Which type of polymerization involves the repeated addition of monomers without the loss of any small molecules?
Condensation polymerization
Addition polymerization
Copolymerization
Cross-linking polymerization
Explanation - In addition polymerization, monomers add together without losing any atoms, forming a polymer chain. Condensation polymerization involves loss of small molecules like water.
Correct answer is: Addition polymerization
Q.3 The monomer of Bakelite is:
Phenol and formaldehyde
Ethylene
Propylene
Vinyl chloride
Explanation - Bakelite is a phenol-formaldehyde resin formed by condensation polymerization of phenol with formaldehyde.
Correct answer is: Phenol and formaldehyde
Q.4 Which polymer is used in making bulletproof vests?
PVC
Teflon
Kevlar
Polystyrene
Explanation - Kevlar is a high-strength synthetic polymer used in bulletproof vests due to its exceptional tensile strength.
Correct answer is: Kevlar
Q.5 Which of the following polymers is biodegradable?
Polyethylene
Polystyrene
Polyhydroxybutyrate (PHB)
Teflon
Explanation - PHB is a biodegradable polymer produced by bacterial fermentation. Polyethylene, polystyrene, and Teflon are non-biodegradable.
Correct answer is: Polyhydroxybutyrate (PHB)
Q.6 Vulcanization of rubber involves:
Addition of sulfur to cross-link polymer chains
Hydrogenation
Oxidation
Hydrolysis
Explanation - Vulcanization strengthens rubber by forming sulfur cross-links between polymer chains, improving elasticity and durability.
Correct answer is: Addition of sulfur to cross-link polymer chains
Q.7 Which polymer is commonly used for making beverage bottles?
Polyethylene terephthalate (PET)
Polystyrene
Polyvinyl chloride
Nylon
Explanation - PET is widely used in beverage bottles due to its strength, lightweight, and resistance to moisture.
Correct answer is: Polyethylene terephthalate (PET)
Q.8 The polymer formed by condensation of adipic acid and hexamethylene diamine is:
Nylon-6,6
Nylon-6
Polyethylene
Polypropylene
Explanation - Nylon-6,6 is formed by condensation polymerization of hexamethylene diamine with adipic acid.
Correct answer is: Nylon-6,6
Q.9 Polyacrylonitrile is the precursor for which synthetic fiber?
Nylon
Acrylic fiber
Polyester
Kevlar
Explanation - Acrylic fibers are made by polymerization of acrylonitrile, resulting in fibers with wool-like properties.
Correct answer is: Acrylic fiber
Q.10 Which of the following is a thermosetting polymer?
Bakelite
Polyethylene
Polypropylene
PVC
Explanation - Thermosetting polymers, like Bakelite, harden permanently on heating and cannot be remolded.
Correct answer is: Bakelite
Q.11 Which polymer is used in non-stick cookware?
PVC
Teflon
Polyester
Polystyrene
Explanation - Teflon (polytetrafluoroethylene) has low friction and high chemical resistance, making it ideal for non-stick coatings.
Correct answer is: Teflon
Q.12 Condensation polymers are characterized by:
Loss of small molecules during polymer formation
Addition of monomers without loss
Formation of only natural polymers
Being always crystalline
Explanation - Condensation polymerization involves the elimination of small molecules like water or HCl during polymer formation.
Correct answer is: Loss of small molecules during polymer formation
Q.13 Which monomer is used to make polystyrene?
Styrene
Ethylene
Vinyl chloride
Propylene
Explanation - Polystyrene is produced by the addition polymerization of styrene monomers.
Correct answer is: Styrene
Q.14 Which polymer is formed from the monomer vinyl chloride?
PVC
Polypropylene
Polystyrene
Polyethylene
Explanation - Polyvinyl chloride (PVC) is formed by addition polymerization of vinyl chloride.
Correct answer is: PVC
Q.15 Which of the following is an example of an elastomer?
Polyethylene
Natural rubber
Bakelite
Teflon
Explanation - Elastomers are polymers that exhibit high elasticity. Natural rubber is a typical elastomer.
Correct answer is: Natural rubber
Q.16 Which type of polymer has repeating units joined by peptide bonds?
Protein
Polyester
Nylon
Polyethylene
Explanation - Proteins are natural polymers composed of amino acids linked by peptide bonds.
Correct answer is: Protein
Q.17 Which of the following polymers is used in electrical insulation?
PVC
Polyethylene terephthalate
Bakelite
Teflon
Explanation - Bakelite is a good insulator and is widely used in electrical applications due to its non-conductivity and heat resistance.
Correct answer is: Bakelite
Q.18 The polymer used for making fibers like Orlon is:
Polyacrylonitrile
Polyethylene
Polypropylene
Nylon-6
Explanation - Orlon fibers are made from polyacrylonitrile through polymerization of acrylonitrile.
Correct answer is: Polyacrylonitrile
Q.19 Which polymer is commonly used for disposable syringes?
Polypropylene
Polyethylene
PVC
Polystyrene
Explanation - Polypropylene is used in medical applications due to its chemical resistance and sterilizability.
Correct answer is: Polypropylene
Q.20 Which of the following is a synthetic elastomer?
Buna-S
Cellulose
Polyethylene
Bakelite
Explanation - Buna-S is a synthetic rubber made from butadiene and styrene, exhibiting elastic properties.
Correct answer is: Buna-S
Q.21 Which polymer is used for making raincoats and waterproof sheets?
PVC
Polyester
Teflon
Nylon
Explanation - PVC is water-resistant and is widely used for raincoats, tarpaulins, and waterproof sheets.
Correct answer is: PVC
Q.22 Polyesters are formed by the condensation of:
Dicarboxylic acids and diols
Amino acids
Ethylene
Vinyl chloride
Explanation - Polyesters are formed via condensation polymerization of dicarboxylic acids and diols, with elimination of water.
Correct answer is: Dicarboxylic acids and diols
Q.23 Which polymer is known as artificial silk?
Rayon
Polyester
Nylon
Polyacrylonitrile
Explanation - Rayon is a semi-synthetic polymer derived from cellulose and is often called artificial silk due to its texture.
Correct answer is: Rayon
Q.24 Cross-linking of polymer chains increases:
Elasticity
Melting point
Solubility in water
None of the above
Explanation - Cross-linking forms bonds between polymer chains, making them more rigid and increasing melting point and thermal stability.
Correct answer is: Melting point
Q.25 Which polymer is used in making compact discs (CDs)?
Polycarbonate
Polyethylene
PVC
Polystyrene
Explanation - Polycarbonate is a strong, transparent polymer used for CDs, DVDs, and eyewear lenses due to its durability and optical clarity.
Correct answer is: Polycarbonate