AQA GCSE Chemistry Paper 1 Practice Exam 2026 – All-in-One Comprehensive Guide for Exam Success!

When a gas cools down, the particles lose energy. This decrease in energy leads to a reduction in the speed of the particles, allowing them to come closer together. As the particles lose kinetic energy and slow down, attractive forces between the particles can take effect, leading to the formation of more intermolecular bonds. This process can eventually result in a change of state, such as gas condensing into a liquid. In some cases, if the gas cools significantly, it may even lead to solidification, but that does not imply that the gas becomes a solid directly. The other options suggest processes or effects that do not accurately describe what occurs when a gas cools down.