Pre AP Chemistry -2.2A Intermolecular Forces- MCQ Exam Style Questions -New Syllabus 2025-2026
Pre AP Chemistry -2.2A Intermolecular Forces- MCQ Exam Style Questions – New Syllabus 2025-2026
Pre AP Chemistry -2.2A Intermolecular Forces- MCQ Exam Style Questions – Pre AP Chemistry – per latest Pre AP Chemistry Syllabus.
Question:
In which substance are the only intermolecular forces temporary dipole-induced dipole attractions?
A hydrogen chloride
B methanol
C octane
D water
▶️Answer/Explanation
Ans:C
Question
In which of the following, when in liquid form, are there only intermolecular forces based on temporary dipoles between the particles?
A bromine
B ethanol
C hydrogen chloride
D water
▶️Answer/Explanation
Ans:A
Question
Copper has a high melting point.
What is the reason for the high melting point of copper?
A strong attractive forces between copper atoms only
B strong attractive forces between copper ions and delocalised electrons
C strong attractive forces between copper ions only
D strong attractive forces between copper atoms and delocalised electrons
▶️Answer/Explanation
Ans:B
Question:
The strong hydrogen bonding present in liquid water causes an increase in which properties?
1 viscosity
2 boiling point
3 surface tension
▶️Answer/Explanation
Ans:A
Question
The boiling points of methane, ethane, propane and butane are given.
Which statement explains the increase in boiling point from methane to butane?
A Closer packing of molecules results in stronger van der Waals’ forces.
B More covalent bonds are present and therefore more energy is required to break the bonds.
C More electrons in the molecules results in stronger van der Waals’ forces.
D More hydrogen atoms in the molecules results in stronger hydrogen bonding.
▶️Answer/Explanation
Ans:C
Question
Which molecules have an overall dipole moment?
1 carbon monoxide, $\mathrm{CO}$
2 phosphine, $\mathrm{PH}_3$
3 carbon dioxide, $\mathrm{CO}_2$
▶️Answer/Explanation
Ans:B
Question
Elements X, Y and Z are all in the first two periods of the Periodic Table.
Their Pauling electronegativity values, \(E_N\), are shown.
Substances exist with formulae XZ, YZ and \(Z_2\).
Which row puts these substances in order of increasing melting point?
Answer/Explanation
Ans: C
Question
The boiling points of some hydrogen halides are shown.
What is the explanation for the trend in boiling point for the hydrogen halides from HCl to HI?
A The bond energies of the hydrogen halides increase from HCl to HI.
B There is an increase in the strength of the intermolecular forces of attraction from HCl to HI.
C The intermolecular hydrogen bonds become stronger from HCl to HI.
D There is an increase in the bond polarity from HCl to HI.
Answer/Explanation
Ans: B
Question
For which pair is the boiling point of the first compound higher than the boiling point of the second compound?
A \(CH_3CH_2OH\) and \(CH_3CH_2SH\)
B \(CH_3CO_2CH_3\) and \(CH_3CH_2CO_2H\)
C \(CH_3OCH_3\) and \(CH_3CH_2OH\)
D \(CH_3CH_2CHO\) and \(CH_3CH_2CO_2H\)
Answer/Explanation
Ans: A
Question
Which type of interaction exists between water molecules and metal cations in aqueous solution?
A dipole-dipole interactions
B hydrogen bonds
C ion-dipole interactions
D ionic bonds
Answer/Explanation
Answer C
Question
Liquids X and Y do not react with one another. They have identical boiling points.
When a particular volume of X is shaken with a similar volume of Y, they form a liquid mixture Z. The average intermolecular forces in liquid Z are stronger than the average of the forces in X and the forces in Y.
Which deductions from this information are correct?
1 The mixing of X and Y is exothermic.
2 The vapour pressure of liquid Z will be less than that of either liquid X or liquid Y at the same temperature.
3 The boiling point of liquid Z will be lower than that of either liquid X or liquid Y at the same pressure.
▶️Answer/Explanation
Answer B
Question
Liquids X and Y do not react with one another. They have identical boiling points.
When a particular volume of X is shaken with a similar volume of Y, they form a liquid mixture Z. The average intermolecular forces in liquid Z are stronger than the average of the forces in X and the forces in Y.
Which deductions from this information are correct?
1 The mixing of X and Y is exothermic.
2 The vapour pressure of liquid Z will be less than that of either liquid X or liquid Y at the same temperature.
3 The boiling point of liquid Z will be lower than that of either liquid X or liquid Y at the same pressure.
▶️Answer/Explanation
Answer B
Question
What is the oxidation number of sulfur in each species?
Answer/Explanation
Answer A