Nanoparticles of a metal oxide are used as a catalyst. Only a very small mass of the nanoparticles is needed.
Which feature of the nanoparticles explains why only a very small mass is needed?
They have a very small volume for each particle
They have a very large surface area for each gram
They have a very small mass for each particle
They have a very large number of particles per gram
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.