ACCURACY IS GUARANTEED
CHM 219 Module 7 Questions with Detailed
Verified Answers for Accuracy
Quiz: Define Heterocyle as it applies to organic molecules.⼀
Answer: Cyclic molecules in which one or mroe carbon atoms
are replaced by heteratoms - elements other than carbon or
hydrogen.
Quiz: What are two main sub-groups of heterocyclic
compounds?⼀Answer: Aliphatic and Aromatic
Quiz: Explain why pyridine is soluble in water.⼀Answer:
First - the ability of pyridine to accept Hydrogen bonding
interactions from water molecules due to the lone pair of
electrons in the nitrogen atom. In addition, the electronegative
nitrogen creates a relatively strong dipole moment in the
pyridine molecule, thus making pyridine a polar compound
overall.
Quiz: Is pyridine more likely to act as an acid or base?
Explain.⼀Answer: Pyridine, like all amines, is a weak base.
Amines use the lone pair on the nitrogen atom to accept
protons and thus act as bases.
, ACCURACY IS GUARANTEED
Quiz: Name the two main classes of reactions that the
pyridine molecule will undergo -⼀Answer: EAS - Electrophilic
Aromatic Substitution
NAS - Nucleophilic Aromatic Substitution
Quiz: Heterocyclic six-membered rings with two or more N
atoms present as a part of the ring system are known as what
type of heterocycles?⼀Answer: Azines
Quiz: Why are pyrimidines the most biologically important
members of the diazene family of molecules?⼀Answer:
Derivatives of pyrimidines are important bases in the nucleic
acids DNA and RNA , namely cytosine, thymine and uracil.
Quiz: Name the most important five-membered heterocyclic
compounds containing a single heteroatom substitution and
state which element is the heteroatom in each.⼀Answer:
Furan (Oxygen based)
Pyrrole (Nitrogen based)
Thiophene (sulfur based)
Quiz: What is the most important difference between five
and six membered heterocycles in terms of the bonding a the
CHM 219 Module 7 Questions with Detailed
Verified Answers for Accuracy
Quiz: Define Heterocyle as it applies to organic molecules.⼀
Answer: Cyclic molecules in which one or mroe carbon atoms
are replaced by heteratoms - elements other than carbon or
hydrogen.
Quiz: What are two main sub-groups of heterocyclic
compounds?⼀Answer: Aliphatic and Aromatic
Quiz: Explain why pyridine is soluble in water.⼀Answer:
First - the ability of pyridine to accept Hydrogen bonding
interactions from water molecules due to the lone pair of
electrons in the nitrogen atom. In addition, the electronegative
nitrogen creates a relatively strong dipole moment in the
pyridine molecule, thus making pyridine a polar compound
overall.
Quiz: Is pyridine more likely to act as an acid or base?
Explain.⼀Answer: Pyridine, like all amines, is a weak base.
Amines use the lone pair on the nitrogen atom to accept
protons and thus act as bases.
, ACCURACY IS GUARANTEED
Quiz: Name the two main classes of reactions that the
pyridine molecule will undergo -⼀Answer: EAS - Electrophilic
Aromatic Substitution
NAS - Nucleophilic Aromatic Substitution
Quiz: Heterocyclic six-membered rings with two or more N
atoms present as a part of the ring system are known as what
type of heterocycles?⼀Answer: Azines
Quiz: Why are pyrimidines the most biologically important
members of the diazene family of molecules?⼀Answer:
Derivatives of pyrimidines are important bases in the nucleic
acids DNA and RNA , namely cytosine, thymine and uracil.
Quiz: Name the most important five-membered heterocyclic
compounds containing a single heteroatom substitution and
state which element is the heteroatom in each.⼀Answer:
Furan (Oxygen based)
Pyrrole (Nitrogen based)
Thiophene (sulfur based)
Quiz: What is the most important difference between five
and six membered heterocycles in terms of the bonding a the
