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CHM 219 MODULE 7 QUESTIONS AND
CORRECT DETAILED ANSWERS
|ALREADY GRADED A+ LATEST
UPDATE | 2024-2025
Define Heterocyle as it applies to organic molecules.
Ans
✓ Cyclic molecules in which one or mroe carbon atoms are replaced by heteratoms - elements
other than carbon or hydrogen.
What are two main sub-groups of heterocyclic compounds?
Ans
✓ Aliphatic and Aromatic
Explain why pyridine is soluble in water.
Ans
✓ 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.
Is pyridine more likely to act as an acid or base? Explain.
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Ans
✓ 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.
Name the two main classes of reactions that the pyridine molecule will
undergo -
Ans
✓ EAS - Electrophilic Aromatic Substitution
✓ NAS - Nucleophilic Aromatic Substitution
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?
Ans
✓ Azines
Why are pyrimidines the most biologically important members of the diazene
family of molecules?
Ans
✓ Derivatives of pyrimidines are important bases in the nucleic acids DNA and RNA , namely
cytosine, thymine and uracil.
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© 2024 TestTrackers Your Success is Our Mission!
Customer Support: [+254707240657]
CHM 219 MODULE 7 QUESTIONS AND
CORRECT DETAILED ANSWERS
|ALREADY GRADED A+ LATEST
UPDATE | 2024-2025
Define Heterocyle as it applies to organic molecules.
Ans
✓ Cyclic molecules in which one or mroe carbon atoms are replaced by heteratoms - elements
other than carbon or hydrogen.
What are two main sub-groups of heterocyclic compounds?
Ans
✓ Aliphatic and Aromatic
Explain why pyridine is soluble in water.
Ans
✓ 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.
Is pyridine more likely to act as an acid or base? Explain.
TestTrackers: Unlock Your Exam Potential! | Quality Practice Materials | Boost Your Confidence
Today!
, Thank You for Choosing Us! Resources & Updates: [Testtrackers - Stuvia US]
© 2024 TestTrackers Your Success is Our Mission!
Customer Support: [+254707240657]
Ans
✓ 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.
Name the two main classes of reactions that the pyridine molecule will
undergo -
Ans
✓ EAS - Electrophilic Aromatic Substitution
✓ NAS - Nucleophilic Aromatic Substitution
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?
Ans
✓ Azines
Why are pyrimidines the most biologically important members of the diazene
family of molecules?
Ans
✓ Derivatives of pyrimidines are important bases in the nucleic acids DNA and RNA , namely
cytosine, thymine and uracil.
TestTrackers: Unlock Your Exam Potential! | Quality Practice Materials | Boost Your Confidence
Today!
