Polymers
Q. What is the main advantage of using polymers in manufacturing?
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A.
High melting point
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B.
Lightweight
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C.
High electrical conductivity
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D.
Brittleness
Solution
Polymers are lightweight, making them advantageous for various manufacturing applications.
Correct Answer: B — Lightweight
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Q. What is the main feature of addition polymerization?
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A.
Involves the loss of small molecules
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B.
Involves the addition of monomers without by-products
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C.
Requires a catalyst
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D.
Involves the formation of cross-linked structures
Solution
Addition polymerization involves the addition of monomers to form a polymer without the loss of small molecules.
Correct Answer: B — Involves the addition of monomers without by-products
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Q. What is the main feature of addition polymers?
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A.
They release small molecules during polymerization
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B.
They are formed from monomers with double bonds
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C.
They have a high degree of crystallinity
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D.
They are always biodegradable
Solution
Addition polymers are formed from monomers that contain double bonds, which open up to form long chains.
Correct Answer: B — They are formed from monomers with double bonds
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Q. What is the main feature of condensation polymerization?
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A.
It produces small molecules as byproducts
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B.
It requires high temperatures
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C.
It involves ionic bonds
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D.
It is a reversible reaction
Solution
Condensation polymerization produces small molecules, such as water, as byproducts.
Correct Answer: A — It produces small molecules as byproducts
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Q. What is the main feature of elastomers?
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A.
High tensile strength
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B.
Elasticity
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C.
Brittleness
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D.
Thermal stability
Solution
Elastomers are characterized by their elasticity, allowing them to stretch and return to their original shape.
Correct Answer: B — Elasticity
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Q. What is the main monomer used to produce polyethylene?
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A.
Propylene
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B.
Ethylene
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C.
Butylene
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D.
Styrene
Solution
Ethylene is the main monomer used to produce polyethylene through addition polymerization.
Correct Answer: B — Ethylene
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Q. What is the main use of polycarbonate?
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A.
Insulation
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B.
Optical lenses
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C.
Textiles
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D.
Adhesives
Solution
Polycarbonate is primarily used in the production of optical lenses due to its clarity and strength.
Correct Answer: B — Optical lenses
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Q. What is the main use of polyvinyl chloride (PVC)?
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A.
Insulation
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B.
Pipes and fittings
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C.
Textiles
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D.
Adhesives
Solution
Polyvinyl chloride (PVC) is primarily used in pipes and fittings due to its durability.
Correct Answer: B — Pipes and fittings
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Q. What is the primary bond type in polymers?
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A.
Ionic bonds
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B.
Covalent bonds
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C.
Metallic bonds
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D.
Hydrogen bonds
Solution
Covalent bonds are the primary bond type in polymers, linking monomers together.
Correct Answer: B — Covalent bonds
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Q. What is the primary monomer used in the production of polyethylene?
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A.
Propylene
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B.
Ethylene
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C.
Styrene
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D.
Vinyl chloride
Solution
Polyethylene is primarily made from the polymerization of ethylene monomers.
Correct Answer: B — Ethylene
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Q. What is the primary monomer used to produce polystyrene?
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A.
Ethylene
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B.
Propylene
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C.
Styrene
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D.
Vinyl chloride
Solution
Styrene is the primary monomer used to produce polystyrene.
Correct Answer: C — Styrene
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Q. What is the primary structure of a polymer determined by?
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A.
The arrangement of monomers
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B.
The molecular weight
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C.
The type of bonds
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D.
The color of the polymer
Solution
The primary structure of a polymer is determined by the arrangement of its monomers.
Correct Answer: A — The arrangement of monomers
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Q. What is the primary type of bonding in polymers?
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A.
Ionic bonding
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B.
Covalent bonding
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C.
Metallic bonding
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D.
Hydrogen bonding
Solution
Covalent bonding is the primary type of bonding in polymers, linking monomers together.
Correct Answer: B — Covalent bonding
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Q. What is the primary use of Teflon?
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A.
Insulation
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B.
Non-stick coatings
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C.
Adhesives
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D.
Textiles
Solution
Teflon is primarily used for non-stick coatings in cookware due to its low friction properties.
Correct Answer: B — Non-stick coatings
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Q. What is the process called when a polymer is formed by the addition of monomers without the loss of any small molecules?
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A.
Condensation polymerization
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B.
Addition polymerization
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C.
Cross-linking
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D.
Chain termination
Solution
Addition polymerization is the process where monomers add together without the loss of small molecules.
Correct Answer: B — Addition polymerization
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Q. What is the process called when a polymer is formed by the elimination of a small molecule?
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A.
Addition polymerization
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B.
Condensation polymerization
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C.
Chain-growth polymerization
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D.
Step-growth polymerization
Solution
Condensation polymerization is the process where a polymer is formed by the elimination of a small molecule.
Correct Answer: B — Condensation polymerization
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Q. What is the process of creating a polymer from monomers called?
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A.
Polymerization
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B.
Depolymerization
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C.
Sublimation
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D.
Condensation
Solution
The process of creating a polymer from monomers is called polymerization.
Correct Answer: A — Polymerization
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Q. What is the repeating unit in polyethylene?
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A.
-CH2-CH2-
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B.
-C6H5-
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C.
-C3H6-
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D.
-C2H4-
Solution
The repeating unit in polyethylene is -CH2-CH2-, derived from ethylene monomers.
Correct Answer: A — -CH2-CH2-
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Q. What type of polymer is formed by the polymerization of unsaturated monomers?
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A.
Addition polymer
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B.
Condensation polymer
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C.
Natural polymer
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D.
Biopolymer
Solution
Addition polymers are formed by the polymerization of unsaturated monomers.
Correct Answer: A — Addition polymer
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Q. What type of polymer is formed from the polymerization of isoprene?
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A.
Natural rubber
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B.
Nylon
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C.
Polyethylene
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D.
Polystyrene
Solution
Natural rubber is formed from the polymerization of isoprene.
Correct Answer: A — Natural rubber
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Q. What type of polymer is formed when amino acids link together?
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A.
Polysaccharides
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B.
Proteins
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C.
Nucleic acids
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D.
Lipids
Solution
Proteins are polymers formed by the linkage of amino acids through peptide bonds.
Correct Answer: B — Proteins
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Q. What type of polymerization involves the formation of a polymer by the reaction of monomers with unsaturated bonds?
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A.
Addition polymerization
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B.
Condensation polymerization
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C.
Chain-growth polymerization
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D.
Step-growth polymerization
Solution
Addition polymerization involves the reaction of monomers with unsaturated bonds to form a polymer.
Correct Answer: A — Addition polymerization
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Q. What type of polymerization involves the formation of a polymer by the reaction of monomers with functional groups?
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A.
Addition polymerization
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B.
Condensation polymerization
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C.
Chain-growth polymerization
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D.
Step-growth polymerization
Solution
Condensation polymerization involves the reaction of monomers with functional groups, resulting in the elimination of small molecules.
Correct Answer: B — Condensation polymerization
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Q. What type of polymerization involves the formation of a polymer from monomers with the elimination of a small molecule?
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A.
Addition polymerization
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B.
Condensation polymerization
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C.
Chain-growth polymerization
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D.
Step-growth polymerization
Solution
Condensation polymerization involves the elimination of a small molecule, such as water.
Correct Answer: B — Condensation polymerization
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Q. What type of structure do cross-linked polymers have?
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A.
Linear
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B.
Branched
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C.
Network
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D.
Cyclic
Solution
Cross-linked polymers have a network structure due to the presence of covalent bonds between chains.
Correct Answer: C — Network
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Q. What type of structure do most synthetic polymers have?
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A.
Linear
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B.
Branched
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C.
Cross-linked
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D.
All of the above
Solution
Most synthetic polymers can have linear, branched, or cross-linked structures depending on their synthesis.
Correct Answer: D — All of the above
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Q. What type of structure do most thermoplastics have?
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A.
Cross-linked structure
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B.
Linear or branched structure
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C.
Crystalline structure
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D.
Amorphous structure
Solution
Most thermoplastics have a linear or branched structure, allowing them to be remolded upon heating.
Correct Answer: B — Linear or branched structure
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Q. Which of the following is a biodegradable polymer?
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A.
Polyethylene
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B.
Polylactic acid (PLA)
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C.
Polypropylene
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D.
Polystyrene
Solution
Polylactic acid (PLA) is a biodegradable polymer derived from renewable resources.
Correct Answer: B — Polylactic acid (PLA)
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Q. Which of the following is a characteristic of thermoplastic polymers?
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A.
They can be reshaped upon heating
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B.
They are rigid and brittle
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C.
They do not melt
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D.
They are cross-linked
Solution
Thermoplastic polymers can be reshaped upon heating, unlike thermosetting polymers.
Correct Answer: A — They can be reshaped upon heating
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Q. Which of the following is a characteristic of thermosetting polymers?
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A.
They can be remolded upon heating
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B.
They are soluble in organic solvents
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C.
They do not melt upon heating
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D.
They are flexible
Solution
Thermosetting polymers do not melt upon heating; they harden permanently after being set.
Correct Answer: C — They do not melt upon heating
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