CHEM 219 MODULE 5 FINAL TEST 2026
QUESTIONS WITH CORRECT ANSWERS
GRADED A+
◍ molecular mass of polymers.
Answer: average molecular weight and polydispersity
◍ False.
Answer: Determine if the following statement regarding aromatic
compounds is true or false.The π-bonding network in the benzene ring is
formed by the end-on overlap of p orbitals located on each carbon of the
ring.
◍ polystyrene (monomer styrene ((Vinyl Benzene))).
Answer: important example of an amorphous polymer
◍ Isotactic.
Answer: all stereocenters have the same configuration
◍ molecular mass of polymers.
Answer: differs from typical molecules d/t polymerization reaction
producing a distribution of molecular weights and shapes
◍ Homolyzed.
Answer: broken so that each atom joined by the bond gets one of the two
electrons in the bond
◍ The final polymer chain does NOT include all the atoms initially present in
the monomer molecules.
Answer: The defining characteristic of step-growth polymers
◍ i) Aliphaticii) Branched iii) Carboxylic acid, 2° alkyl halide.
Answer: Classify the following organic molecule in terms of:i) The type of
, hydrocarbon skeleton (aliphatic or aromatic)ii) The configuration of the
hydrocarbon skeleton (linear, branched, or cyclic)iii) The type of functional
group(s) present - name all the groups present (include subclassification of
1°, 2°, 3° when appropriate). You are not being asked to generate the
IUPAC name of the molecule, only to state what functional groups are
present.
◍ typically di or polyfunctional.
Answer: functionality of step-growth monomers
◍ The structures represent constitutional isomers. While the molecular
formulae are the same, the left structure is 1,1-dichloropropane and the right
structure is 1,2-dichloropropane. This is a difference in atomic connectivity
which makes them constitutional isomers..
Answer: For the following pair of structures, determine if the two structural
representations are:1. Constitutional isomers2. Stereoisomers3. The same
compound (identical)Briefly explain your classification.
◍ A. (Z)-1-chloro-4-methyl-hept-3-ene or (Z)-1-chloro-4-methyl-3-heptene
B. (E)-1,4-dichlorohept-3-ene or (E)-1,4-dichloro-3-heptene.
Answer: For each of the following alkenes, generate the IUPAC systematic
name for the molecule, including the E/Z designation for the double bond.
◍ True.
Answer: Determine if the following statement regarding aromatic
compounds is true or false.Two substituents located on carbons 1 and 4 of
the benzene ring are said to be para to each other.
◍ cation addition polymerization termination.
Answer: terminates by the removal of a hydrogen atom from a carbon atom
adjacent to the positively charged carbon to form an alkene (like in an
elimination reaction)
◍ C8H7N.
Answer: Determine the molecular formula for the given structural formula
representation
, ◍ C8H10.
Answer: Determine the molecular formula for the given structural formula
representation
◍ 1. natural (in nature) 2. synthetic (in lab).
Answer: two ways polymers are made
◍ Ligands.
Answer: A molecule that binds specifically to a receptor site of another
molecule.-coordinated to the metal ion that bind monomers prior to insertion
into the growing chain -specifically utilized in Ziegler-Natta catalysts
◍ True.
Answer: Determine if the following statements regarding substitution (Sn)
and elimination (E) mechanisms are true or false.The first step in an Sn1 or
E1 mechanism is the departure of the leaving group.
◍ Saran.
Answer: chain-growth polymer: polyvinylidenedichloride monomer:
H2C=CCl2 cling-wrap
◍ False.
Answer: Determine if the following statement regarding aromatic
compounds is true or false.Compounds formed by adding heteroatoms into
the rings (in place of carbon) together are known as polycyclic aromatic
hydrocarbons, or PAHs.
◍ True.
Answer: Determine if the following statements regarding substitution (Sn)
and elimination (E) mechanisms are true or false.“Inversion” of geometry is
typically associated with the Sn2 mechanism.
◍ some step as initiation in that monomers add in head to tail fashion with
substituents present on alternating carbons in the chain.
Answer: what is chain propagation the same as?
◍ cation addition polymerization propagation.
QUESTIONS WITH CORRECT ANSWERS
GRADED A+
◍ molecular mass of polymers.
Answer: average molecular weight and polydispersity
◍ False.
Answer: Determine if the following statement regarding aromatic
compounds is true or false.The π-bonding network in the benzene ring is
formed by the end-on overlap of p orbitals located on each carbon of the
ring.
◍ polystyrene (monomer styrene ((Vinyl Benzene))).
Answer: important example of an amorphous polymer
◍ Isotactic.
Answer: all stereocenters have the same configuration
◍ molecular mass of polymers.
Answer: differs from typical molecules d/t polymerization reaction
producing a distribution of molecular weights and shapes
◍ Homolyzed.
Answer: broken so that each atom joined by the bond gets one of the two
electrons in the bond
◍ The final polymer chain does NOT include all the atoms initially present in
the monomer molecules.
Answer: The defining characteristic of step-growth polymers
◍ i) Aliphaticii) Branched iii) Carboxylic acid, 2° alkyl halide.
Answer: Classify the following organic molecule in terms of:i) The type of
, hydrocarbon skeleton (aliphatic or aromatic)ii) The configuration of the
hydrocarbon skeleton (linear, branched, or cyclic)iii) The type of functional
group(s) present - name all the groups present (include subclassification of
1°, 2°, 3° when appropriate). You are not being asked to generate the
IUPAC name of the molecule, only to state what functional groups are
present.
◍ typically di or polyfunctional.
Answer: functionality of step-growth monomers
◍ The structures represent constitutional isomers. While the molecular
formulae are the same, the left structure is 1,1-dichloropropane and the right
structure is 1,2-dichloropropane. This is a difference in atomic connectivity
which makes them constitutional isomers..
Answer: For the following pair of structures, determine if the two structural
representations are:1. Constitutional isomers2. Stereoisomers3. The same
compound (identical)Briefly explain your classification.
◍ A. (Z)-1-chloro-4-methyl-hept-3-ene or (Z)-1-chloro-4-methyl-3-heptene
B. (E)-1,4-dichlorohept-3-ene or (E)-1,4-dichloro-3-heptene.
Answer: For each of the following alkenes, generate the IUPAC systematic
name for the molecule, including the E/Z designation for the double bond.
◍ True.
Answer: Determine if the following statement regarding aromatic
compounds is true or false.Two substituents located on carbons 1 and 4 of
the benzene ring are said to be para to each other.
◍ cation addition polymerization termination.
Answer: terminates by the removal of a hydrogen atom from a carbon atom
adjacent to the positively charged carbon to form an alkene (like in an
elimination reaction)
◍ C8H7N.
Answer: Determine the molecular formula for the given structural formula
representation
, ◍ C8H10.
Answer: Determine the molecular formula for the given structural formula
representation
◍ 1. natural (in nature) 2. synthetic (in lab).
Answer: two ways polymers are made
◍ Ligands.
Answer: A molecule that binds specifically to a receptor site of another
molecule.-coordinated to the metal ion that bind monomers prior to insertion
into the growing chain -specifically utilized in Ziegler-Natta catalysts
◍ True.
Answer: Determine if the following statements regarding substitution (Sn)
and elimination (E) mechanisms are true or false.The first step in an Sn1 or
E1 mechanism is the departure of the leaving group.
◍ Saran.
Answer: chain-growth polymer: polyvinylidenedichloride monomer:
H2C=CCl2 cling-wrap
◍ False.
Answer: Determine if the following statement regarding aromatic
compounds is true or false.Compounds formed by adding heteroatoms into
the rings (in place of carbon) together are known as polycyclic aromatic
hydrocarbons, or PAHs.
◍ True.
Answer: Determine if the following statements regarding substitution (Sn)
and elimination (E) mechanisms are true or false.“Inversion” of geometry is
typically associated with the Sn2 mechanism.
◍ some step as initiation in that monomers add in head to tail fashion with
substituents present on alternating carbons in the chain.
Answer: what is chain propagation the same as?
◍ cation addition polymerization propagation.
