Which of these statements about nanoparticles is correct?
The diameter of a typical nanoparticle is between 1×10−12 m1 \times 10^{-12}\text{ m}1×10−12 m and 1×10−10 m1 \times 10^{-10}\text{ m}1×10−10 m.
Nanoparticles have a smaller surface area to volume ratio than bulk materials of the same substance.
Nanoparticles can be used in sunscreens because they absorb ultraviolet light while remaining transparent to visible light.
There are no environmental or health concerns associated with the use of nanoparticulate materials.
48 exam-style questions on OCR GCSE Chemistry Properties of materials. Each one has a worked solution and a mark scheme showing where the marks go.