Intermolecular Forces
Chemistry ⇒ Chemical Bonding and Structure
Intermolecular Forces starts at 10 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Intermolecular Forces.
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See sample questions for grade 10
A student notices that pentane (C5H12) has a higher boiling point than methane (CH4). Explain why this is the case.
A student observes that acetone evaporates faster than water at room temperature. Explain this observation in terms of intermolecular forces.
Describe how the molecular size affects the strength of London dispersion forces.
Describe the difference between intermolecular and intramolecular forces.
A student notices that pentane (C5H12) has a higher boiling point than methane (CH4). Explain why this is the case.
A student observes that acetone evaporates faster than water at room temperature. Explain this observation in terms of intermolecular forces.
A liquid is observed to have a very high surface tension and a low rate of evaporation at room temperature. What can you infer about the strength of its intermolecular forces?
A student compares the boiling points of two isomers: n-pentane and neopentane. Both have the same molecular formula (C5H12), but n-pentane has a higher boiling point. Explain this observation in terms of intermolecular forces and molecular shape.
Which of the following best describes the relationship between vapor pressure and intermolecular forces?
(1) Stronger intermolecular forces lead to higher vapor pressure
(2) Stronger intermolecular forces lead to lower vapor pressure
(3) There is no relationship
(4) Vapor pressure is only affected by temperature
Which of the following best explains why oil and water do not mix?
(1) Oil is polar and water is nonpolar
(2) Oil is nonpolar and water is polar
(3) Both oil and water are polar
(4) Both oil and water are nonpolar
Which of the following is NOT a consequence of strong intermolecular forces?
(1) High boiling point
(2) High vapor pressure
(3) High surface tension
(4) High melting point
Which of the following is NOT an intermolecular force?
(1) Hydrogen bonding
(2) Covalent bonding
(3) London dispersion forces
(4) Dipole-dipole interactions
Fill in the blank: The boiling point of a substance generally __________ as the strength of its intermolecular forces increases.
Fill in the blank: The energy required to overcome intermolecular forces and convert a liquid to a gas is called the __________ of vaporization.
Fill in the blank: The high surface tension of water is due to __________.
Fill in the blank: The intermolecular force responsible for the attraction between two HCl molecules is __________.
True or False: Dipole-dipole interactions occur only between polar molecules.
True or False: Hydrogen bonds are stronger than London dispersion forces.
True or False: Intermolecular forces are responsible for the condensation of gases into liquids.
True or False: Intermolecular forces play a role in determining the solubility of substances.
