A cube of a material has sides of length 40 nm.
It is cut up into smaller cubes, each with sides of length 10 nm.
How does the surface area to volume ratio of each small cube compare with that of the original cube?
It decreases by a factor of 4.
It increases by a factor of 4.
It increases by a factor of 16.
It increases by a factor of 64.
60 exam-style questions on OCR GCSE Chemistry 2.3 Properties of materials, covering 2.3.1 Carbon bonding and the variety of organic compounds, 2.3.2 Diamond, graphite, fullerenes and graphene, 2.3.3 Bond strength, changes of state and predicting states, 2.3.4 Bulk properties and types of bonding, and 2.3.5 Nanoparticles: scale, surface area, uses and risks. Each one has a worked solution and a mark scheme showing where the marks go.