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Date November 2017 Marks available 1 Reference code 17N.3.sl.TZ0.6
Level SL Paper 3 Time zone TZ0
Command term Outline Question number 6 Adapted from N/A

Question

Nanotechnology has many applications.

State equations for the formation of iron nanoparticles and carbon atoms from Fe(CO)5 in the HIPCO process.

[2]
a.

Outline why the iron nanoparticle catalysts produced by the HIPCO process are more efficient than solid iron catalysts.

[1]
b.

Discuss one possible risk associated with the use of nanotechnology.

[1]
c.

Markscheme

Fe(CO)5 (g) → Fe (s) + 5CO (g)

2CO (g) → C (s) + CO2 (g)

a.

large surface area «on which carbon nanotubes form»

b.

unknown health effects
OR
unknown effect on immune systems
OR
unknown environmental effects
OR
greater inflammatory response
OR
lung damage/toxicity
OR
hazardous effect on biodiversity
OR
risk of explosion

Do not accept vague responses.

c.

Examiners report

[N/A]
a.
[N/A]
b.
[N/A]
c.

Syllabus sections

Options » A: Materials » A.6 Nanotechnology
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