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Chemistry Edexcel GCSE:
Bulk+Surface Properties

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(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 ...

sun screen
  • A.   are less toxic
  • B.   are invisible on the skin
  • C.   don’t block ultraviolet radiation
  • D.   tend to clump together
9. There are possible risks associated with the use of nanoparticles due to their small size.

Which of the following is NOT a possible risk of using nanoparticles?

  • A.   They may be inhaled
  • B.   Toxic substances may bind to them
  • C.   They may be absorbed into cells
  • D.   They may be more efficient catalysts than the same substance in bulk

10. Which of the following statements about nanoparticles are true?

I. Nanoparticles have a large surface area to volume ratio
II. Nanoparticles may have different properties than the same material in bulk
III. Nanoparticles can be seen under an optical microscope
 
  • A.   I and II only
  • B.   I and III only
  • C.   II and III only
  • D.   I, II and III