Types of intermolecular forceEdexcel International A Level Chemistry: Mind map

Exam questions on Types of intermolecular force

1. Argon is a monatomic gas that can be liquefied at 87 K. Liquid argon is used as a coolant in some laboratory experiments.
   Explain how an instantaneous dipole on one argon atom leads to an attraction between two argon atoms.2 marks
2. Chloromethane, CH₃Cl, and ammonia, NH₃, are both polar molecules. Chloromethane contains a polar C–Cl bond. Ammonia contains polar N–H bonds and a lone pair of electrons on the nitrogen atom.
   Explain why ammonia molecules can form hydrogen bonds with each other but chloromethane molecules cannot.2 marks
3. Hydrogen fluoride, water and ammonia are all liquids or easily liquefied gases whose molecules attract each other by hydrogen bonds. A student is learning to recognise which other molecules can behave in the same way.
   Describe how a hydrogen bond forms between two molecules of water.3 marks