A cube of a solid metal oxide has sides of length 100 nm100\ \text{nm}100 nm. The cube is cut up into cubes with sides of length 10 nm10\ \text{nm}10 nm.
Explain what happens to the surface area to volume ratio of each piece of the metal oxide.
The metal oxide is used as a catalyst.
Explain why the metal oxide is a better catalyst after it has been cut up.
40 exam-style questions on AQA GCSE Chemistry 2.4 Bulk and surface properties of matter including nanoparticles, covering 2.4.1 Sizes of particles and their properties and 2.4.2 Uses of nanoparticles. Each one has a worked solution and a mark scheme showing where the marks go.