GCSE Chemistry - Bulk Properties

(Not Double Science - Chemistry GCSE Only)
1. What is the size range of nanoparticles? A. 0.1 nm to 1 nm B. 1 nm to 10 nm C. 1 nm to 100 nm D. 1 nm to 1000 nm
2. What is the approximate size of an atom? A. 100 nm B. 10 nm C. 1 nm D. 0.1 nm
3. What is the surface area of a cube with sides of 2 nm? A. 4 nm² B. 8 nm² C. 16 nm² D. 24 nm²
4. What is the volume of a cube with sides of 5 nm? A. 25 nm³ B. 75 nm³ C. 125 nm³ D. 150 nm³
5. What is the surface area to volume ratio of a cube with sides 10 nm in length? A. 0.1 B. 0.4 C. 0.6 D. 0.8
6. How does the surface area to volume ratio change if the sides of a cube decrease by a factor of 10? A. decreases by a factor of 2 B. decreases by a factor of 10 C. increases by a factor of 2 D. increases by a factor of 10
7. What is a bulk material? A. A substance in the form of powder, lumps or sheets B. A substance in the form of nanoparticles C. A large amount of nanoparticle material D. A substance with a high molecular mass
8. Nanoparticles of zinc oxide can be used in sunscreen. They are better than powdered zinc oxide because they ...
A. are less toxic B. are invisible on the skin C. don’t block ultraviolet radiation D. tend to clump together