A catalyst is made of cube-shaped nanoparticles with sides of 20 nm20\ \text{nm}20 nm. A new method makes cube-shaped nanoparticles of the same catalyst with sides of 5 nm5\ \text{nm}5 nm.
How does the surface area to volume ratio of the 5 nm5\ \text{nm}5 nm nanoparticles compare with that of the 20 nm20\ \text{nm}20 nm nanoparticles?
It is 64 times greater
It is 4 times smaller
It is 4 times greater
It is 16 times greater
104 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.