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FSG555: POLYMER REACTION PROCESS & ENVIRONMENTAL
IMPACT EXAM QUESTIONS LATEST VERSION QUESTIONS AND
ANSWERS 2026 EDITION
FSG555: Polymer Reaction Process & Environmental Impact Exam
250 Practice Questions with Rationales
Topic 1: Polymer Chemistry Fundamentals
1. Which of the following best defines a polymer?
A) A small molecule with a low molecular weight
B) A large molecule composed of repeating structural units (monomers)
C) A type of metal alloy
D) A simple sugar
Answer: B. A large molecule composed of repeating structural units (monomers)
Rationale: This is the foundational definition of a polymer. Option A describes a
monomer, C describes a metallic material, and D is a specific class of carbohydrates.
2. The process by which monomers are chemically bonded together to form a
polymer chain is known as:
A) Cracking
B) Polymerization
C) Distillation
D) Sublimation
Answer: B. Polymerization
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Rationale: Polymerization is the specific chemical process of linking monomers.
Cracking breaks down large molecules, distillation separates mixtures, and sublimation
is a phase change.
3. Which of the following is an example of an addition polymer?
A) Nylon
B) Polyester
C) Polyethylene
D) Protein
Answer: C. Polyethylene
Rationale: Polyethylene is formed by the addition polymerization of ethylene monomers,
typically via free-radical or coordination mechanisms. Nylon and Polyester are
condensation polymers, and proteins are biopolymers formed via condensation.
4. Condensation polymerization is characterized by:
A) The elimination of a small molecule (e.g., water, HCl)
B) The formation of a double bond
C) The use of a catalyst only
D) The breaking of the polymer chain
Answer: A. The elimination of a small molecule (e.g., water, HCl)
Rationale: This is the hallmark of condensation polymerization. B is associated with
some addition mechanisms, C is not defining, and D is degradation.
5. Which characteristic is typical of a high molecular weight polymer compared to a
low molecular weight polymer?
A) Decreased viscosity
B) Increased mechanical strength
C) Lower melting temperature
D) Increased solubility
Answer: B. Increased mechanical strength
Rationale: Higher molecular weight leads to increased chain entanglement, which
generally increases tensile strength and toughness. A, C, and D are typically inverse
trends.
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6. In polymer science, the term "Tacticity" refers to:
A) The arrangement of side groups along the polymer chain
B) The temperature at which a polymer decomposes
C) The density of the polymer
D) The ratio of monomer to initiator
Answer: A. The arrangement of side groups along the polymer chain
Rationale: Tacticity describes the stereochemistry. B is thermal stability, C is a physical
property, and D relates to polymerization kinetics.
7. Which type of polymer structure features linear chains connected by cross-
links?
A) Linear
B) Branched
C) Network
D) Ladder
Answer: C. Network
Rationale: Network polymers (thermosets) are heavily cross-linked. A and B lack cross-
links, and D is a specific structural conformation.
8. The glass transition temperature (Tg) is the temperature at which:
A) The polymer decomposes
B) An amorphous polymer transitions from a brittle glassy state to a rubbery state
C) The polymer completely melts
D) The polymer crystallizes
Answer: B. An amorphous polymer transitions from a brittle glassy state to a
rubbery state
Rationale: This is the definition of Tg. A is decomposition (Td), C is the melting
temperature (Tm), and D is crystallization temperature (Tc).
9. Which of the following polymers is considered a thermoplastic?
A) Epoxy resin
B) Phenolic resin
C) Polyethylene terephthalate (PET)
D) Silicone
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Answer: C. Polyethylene terephthalate (PET)
Rationale: PET is a thermoplastic, meaning it can be repeatedly softened by heating and
hardened by cooling. Epoxy, Phenolic resins, and most silicones are thermosets.
10. The degree of polymerization (DP) is calculated as:
A) Molecular weight of polymer / Molecular weight of repeat unit
B) Number of monomers / Volume of solution
C) Time / Conversion rate
D) Density / Molar mass
Answer: A. Molecular weight of polymer / Molecular weight of repeat unit
Rationale: DP = Mn/M0. B relates to concentration, C to kinetics, and D is a density
relationship.
Topic 2: Polymerization Kinetics and Mechanisms
11. Which component is essential to initiate a free-radical addition polymerization?
A) A catalyst (initiator)
B) A plasticizer
C) A stabilizer
D) A solvent
Answer: A. A catalyst (initiator)
Rationale: Free-radical polymerization requires an initiator to generate reactive radical
species. B, C, and D are additives that do not initiate the chain reaction.
12. The "auto-acceleration" or gel effect in radical polymerization is caused by:
A) An increase in the termination rate constant
B) A decrease in the termination rate constant due to increased viscosity
C) An increase in the initiation rate
D) A decrease in the propagation rate
Answer: B. A decrease in the termination rate constant due to increased viscosity
Rationale: As the reaction progresses, viscosity increases, slowing down the diffusion of
macro-radicals and reducing the termination rate. This leads to an increase in overall
reaction rate.
FSG555: POLYMER REACTION PROCESS & ENVIRONMENTAL
IMPACT EXAM QUESTIONS LATEST VERSION QUESTIONS AND
ANSWERS 2026 EDITION
FSG555: Polymer Reaction Process & Environmental Impact Exam
250 Practice Questions with Rationales
Topic 1: Polymer Chemistry Fundamentals
1. Which of the following best defines a polymer?
A) A small molecule with a low molecular weight
B) A large molecule composed of repeating structural units (monomers)
C) A type of metal alloy
D) A simple sugar
Answer: B. A large molecule composed of repeating structural units (monomers)
Rationale: This is the foundational definition of a polymer. Option A describes a
monomer, C describes a metallic material, and D is a specific class of carbohydrates.
2. The process by which monomers are chemically bonded together to form a
polymer chain is known as:
A) Cracking
B) Polymerization
C) Distillation
D) Sublimation
Answer: B. Polymerization
, Page 2 of 85
Rationale: Polymerization is the specific chemical process of linking monomers.
Cracking breaks down large molecules, distillation separates mixtures, and sublimation
is a phase change.
3. Which of the following is an example of an addition polymer?
A) Nylon
B) Polyester
C) Polyethylene
D) Protein
Answer: C. Polyethylene
Rationale: Polyethylene is formed by the addition polymerization of ethylene monomers,
typically via free-radical or coordination mechanisms. Nylon and Polyester are
condensation polymers, and proteins are biopolymers formed via condensation.
4. Condensation polymerization is characterized by:
A) The elimination of a small molecule (e.g., water, HCl)
B) The formation of a double bond
C) The use of a catalyst only
D) The breaking of the polymer chain
Answer: A. The elimination of a small molecule (e.g., water, HCl)
Rationale: This is the hallmark of condensation polymerization. B is associated with
some addition mechanisms, C is not defining, and D is degradation.
5. Which characteristic is typical of a high molecular weight polymer compared to a
low molecular weight polymer?
A) Decreased viscosity
B) Increased mechanical strength
C) Lower melting temperature
D) Increased solubility
Answer: B. Increased mechanical strength
Rationale: Higher molecular weight leads to increased chain entanglement, which
generally increases tensile strength and toughness. A, C, and D are typically inverse
trends.
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6. In polymer science, the term "Tacticity" refers to:
A) The arrangement of side groups along the polymer chain
B) The temperature at which a polymer decomposes
C) The density of the polymer
D) The ratio of monomer to initiator
Answer: A. The arrangement of side groups along the polymer chain
Rationale: Tacticity describes the stereochemistry. B is thermal stability, C is a physical
property, and D relates to polymerization kinetics.
7. Which type of polymer structure features linear chains connected by cross-
links?
A) Linear
B) Branched
C) Network
D) Ladder
Answer: C. Network
Rationale: Network polymers (thermosets) are heavily cross-linked. A and B lack cross-
links, and D is a specific structural conformation.
8. The glass transition temperature (Tg) is the temperature at which:
A) The polymer decomposes
B) An amorphous polymer transitions from a brittle glassy state to a rubbery state
C) The polymer completely melts
D) The polymer crystallizes
Answer: B. An amorphous polymer transitions from a brittle glassy state to a
rubbery state
Rationale: This is the definition of Tg. A is decomposition (Td), C is the melting
temperature (Tm), and D is crystallization temperature (Tc).
9. Which of the following polymers is considered a thermoplastic?
A) Epoxy resin
B) Phenolic resin
C) Polyethylene terephthalate (PET)
D) Silicone
, Page 4 of 85
Answer: C. Polyethylene terephthalate (PET)
Rationale: PET is a thermoplastic, meaning it can be repeatedly softened by heating and
hardened by cooling. Epoxy, Phenolic resins, and most silicones are thermosets.
10. The degree of polymerization (DP) is calculated as:
A) Molecular weight of polymer / Molecular weight of repeat unit
B) Number of monomers / Volume of solution
C) Time / Conversion rate
D) Density / Molar mass
Answer: A. Molecular weight of polymer / Molecular weight of repeat unit
Rationale: DP = Mn/M0. B relates to concentration, C to kinetics, and D is a density
relationship.
Topic 2: Polymerization Kinetics and Mechanisms
11. Which component is essential to initiate a free-radical addition polymerization?
A) A catalyst (initiator)
B) A plasticizer
C) A stabilizer
D) A solvent
Answer: A. A catalyst (initiator)
Rationale: Free-radical polymerization requires an initiator to generate reactive radical
species. B, C, and D are additives that do not initiate the chain reaction.
12. The "auto-acceleration" or gel effect in radical polymerization is caused by:
A) An increase in the termination rate constant
B) A decrease in the termination rate constant due to increased viscosity
C) An increase in the initiation rate
D) A decrease in the propagation rate
Answer: B. A decrease in the termination rate constant due to increased viscosity
Rationale: As the reaction progresses, viscosity increases, slowing down the diffusion of
macro-radicals and reducing the termination rate. This leads to an increase in overall
reaction rate.
