During an air-quality survey beside a grain silo, a team measured the diameters of four airborne particles, A, B, C and D.
| Particle | Diameter in nm |
|---|---|
| A | 4700 |
| B | 85 |
| C | 1200 |
| D | 310 |
Two of the particles in the survey are fine particles.
Give the letters of these two particles.
Give the letter of the particle that falls in the nanoparticle size range.
Which particle would be classed as a coarse particle? Give its letter.
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.