1|P a g e
UNE CHEM 1011 – GENERAL CHEMISTRY II
COMPREHENSIVE ACTUAL EXAM PREP 2026
ALL QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RAH RATIONALES ALREADY
A GRADED WITH EXPERT FEEDBACK| NEW
AND REVISED
Question 1
A hydrogen bond is characterized by:
A. The attraction of temporary dipoles produced by the random
asymmetries in electron motion
B. The electrostatic attraction between the permanent dipoles in any
polar molecule
C. The highly concentrated partial charge between an H atom and
F, O, or N atoms
D. The covalent sharing of electrons between two atoms in a molecule
Rationale: A hydrogen bond is a special type of dipole-dipole
interaction that occurs when a hydrogen atom is bonded to a highly
electronegative atom such as F, O, or N. The partial positive charge on
hydrogen is strongly attracted to the partial negative charge on F, O,
or N of another molecule.
Question 2
Which of the following will have the strongest dipole-dipole attractions?
A. NCl₃
B. CCl₄
,2|P a g e
C. BCl₃
D. Cl₂
Rationale: NCl₃ is asymmetrical and has a significant dipole moment.
CCl₄ and Cl₂ are nonpolar, and BCl₃ is trigonal planar and nonpolar.
Nitrogen is more electronegative than boron, making NCl₃ more polar.
Question 3
Which intermolecular force is present in ALL molecules?
A. Hydrogen bonding
B. Dipole-dipole interactions
C. London dispersion forces
D. Ionic bonding
Rationale: London dispersion forces (LDFs) are present in all
molecules due to temporary fluctuations in electron distribution. They
are the only intermolecular force present in nonpolar molecules.
Question 4
A cohesive force is:
A. The result of the intermolecular forces that attract identical
molecules
B. The result of the intermolecular forces that attract different molecules
together
C. The result of covalent interactions between atoms in a molecule
D. Always stronger than an adhesive force
Rationale: Cohesive forces are the intermolecular forces that attract
identical molecules to one another. Adhesive forces attract different
molecules together. "Co" = mutual, so cohesive involves identical
molecules.
Question 5
What is the electron configuration of a neutral Carbon atom in the
ground state?
,3|P a g e
A. 1s² 2s² 2p¹
B. 1s² 2s² 2p²
C. 1s² 2s² 2p³
D. 1s² 2s² 2p⁴
Rationale: Carbon has 6 electrons. The ground state electron
configuration is 1s² 2s² 2p². The 2p subshell contains two electrons,
following Hund's rule.
Question 6
Which subatomic particle is primarily responsible for the chemical
reactivity of an element?
A. Proton
B. Neutron
C. Electron
D. Positron
Rationale: Electrons in the outermost shell (valence electrons) dictate
how an atom interacts and bonds with other atoms. Chemical
reactivity is determined by the valence electron configuration.
Question 7
What is the molality of a solution?
A. Moles of solute per liter of solution
B. Moles of solute per kilogram of solvent
C. Grams of solute per liter of solvent
D. Moles of solute per mole of total solution
Rationale: Molality (m) is defined as moles of solute divided by the
mass of the solvent in kilograms. It is temperature-independent, unlike
molarity.
Question 8
Which quantum number describes the shape of the orbital?
, 4|P a g e
A. Principal quantum number (n)
B. Azimuthal quantum number (ℓ)
C. Magnetic quantum number (mℓ)
D. Spin quantum number (ms)
Rationale: The azimuthal quantum number (ℓ) determines the
subshell and the spatial shape of the orbital (s, p, d, f). The principal
quantum number (n) determines the energy level and size.
Question 9
Sodium chloride is classified as which type of electrolyte?
A. Weak electrolyte
B. Strong electrolyte
C. Non-electrolyte
D. Nonelectrolyte
Rationale: Sodium chloride is an ionic compound that dissociates
completely into ions (Na⁺ and Cl⁻) when dissolved in water. It is
therefore classified as a strong electrolyte.
Question 10
Which of the following describes a liquid?
A. Particles are far apart with no regular arrangement; they move
independently
B. Particles are close together with no regular arrangement; they
can move past each other
C. Particles are tightly packed, arranged in a regular pattern, and
generally do not move
D. Particles are closely packed and vibrate in fixed positions
Rationale: In a liquid, particles are close together with no regular
arrangement. They can move past each other but remain in essentially
constant contact.
UNE CHEM 1011 – GENERAL CHEMISTRY II
COMPREHENSIVE ACTUAL EXAM PREP 2026
ALL QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RAH RATIONALES ALREADY
A GRADED WITH EXPERT FEEDBACK| NEW
AND REVISED
Question 1
A hydrogen bond is characterized by:
A. The attraction of temporary dipoles produced by the random
asymmetries in electron motion
B. The electrostatic attraction between the permanent dipoles in any
polar molecule
C. The highly concentrated partial charge between an H atom and
F, O, or N atoms
D. The covalent sharing of electrons between two atoms in a molecule
Rationale: A hydrogen bond is a special type of dipole-dipole
interaction that occurs when a hydrogen atom is bonded to a highly
electronegative atom such as F, O, or N. The partial positive charge on
hydrogen is strongly attracted to the partial negative charge on F, O,
or N of another molecule.
Question 2
Which of the following will have the strongest dipole-dipole attractions?
A. NCl₃
B. CCl₄
,2|P a g e
C. BCl₃
D. Cl₂
Rationale: NCl₃ is asymmetrical and has a significant dipole moment.
CCl₄ and Cl₂ are nonpolar, and BCl₃ is trigonal planar and nonpolar.
Nitrogen is more electronegative than boron, making NCl₃ more polar.
Question 3
Which intermolecular force is present in ALL molecules?
A. Hydrogen bonding
B. Dipole-dipole interactions
C. London dispersion forces
D. Ionic bonding
Rationale: London dispersion forces (LDFs) are present in all
molecules due to temporary fluctuations in electron distribution. They
are the only intermolecular force present in nonpolar molecules.
Question 4
A cohesive force is:
A. The result of the intermolecular forces that attract identical
molecules
B. The result of the intermolecular forces that attract different molecules
together
C. The result of covalent interactions between atoms in a molecule
D. Always stronger than an adhesive force
Rationale: Cohesive forces are the intermolecular forces that attract
identical molecules to one another. Adhesive forces attract different
molecules together. "Co" = mutual, so cohesive involves identical
molecules.
Question 5
What is the electron configuration of a neutral Carbon atom in the
ground state?
,3|P a g e
A. 1s² 2s² 2p¹
B. 1s² 2s² 2p²
C. 1s² 2s² 2p³
D. 1s² 2s² 2p⁴
Rationale: Carbon has 6 electrons. The ground state electron
configuration is 1s² 2s² 2p². The 2p subshell contains two electrons,
following Hund's rule.
Question 6
Which subatomic particle is primarily responsible for the chemical
reactivity of an element?
A. Proton
B. Neutron
C. Electron
D. Positron
Rationale: Electrons in the outermost shell (valence electrons) dictate
how an atom interacts and bonds with other atoms. Chemical
reactivity is determined by the valence electron configuration.
Question 7
What is the molality of a solution?
A. Moles of solute per liter of solution
B. Moles of solute per kilogram of solvent
C. Grams of solute per liter of solvent
D. Moles of solute per mole of total solution
Rationale: Molality (m) is defined as moles of solute divided by the
mass of the solvent in kilograms. It is temperature-independent, unlike
molarity.
Question 8
Which quantum number describes the shape of the orbital?
, 4|P a g e
A. Principal quantum number (n)
B. Azimuthal quantum number (ℓ)
C. Magnetic quantum number (mℓ)
D. Spin quantum number (ms)
Rationale: The azimuthal quantum number (ℓ) determines the
subshell and the spatial shape of the orbital (s, p, d, f). The principal
quantum number (n) determines the energy level and size.
Question 9
Sodium chloride is classified as which type of electrolyte?
A. Weak electrolyte
B. Strong electrolyte
C. Non-electrolyte
D. Nonelectrolyte
Rationale: Sodium chloride is an ionic compound that dissociates
completely into ions (Na⁺ and Cl⁻) when dissolved in water. It is
therefore classified as a strong electrolyte.
Question 10
Which of the following describes a liquid?
A. Particles are far apart with no regular arrangement; they move
independently
B. Particles are close together with no regular arrangement; they
can move past each other
C. Particles are tightly packed, arranged in a regular pattern, and
generally do not move
D. Particles are closely packed and vibrate in fixed positions
Rationale: In a liquid, particles are close together with no regular
arrangement. They can move past each other but remain in essentially
constant contact.
