DP Chemistry (last assessment 2024)

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Question 20N.3.sl.TZ0.4b(i)

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.3.sl.TZ0.4b(i)
Level sl Paper 3 Time zone TZ0
Command term Suggest Question number b(i) Adapted from N/A
b(i).
[Maximum mark: 1]
20N.3.sl.TZ0.4b(i)

There has been significant growth in the use of carbon nanotubes, CNT.

(b(i))

Alloying metals changes their properties. Suggest one property of magnesium that could be improved by making a magnesium–CNT alloy.

[1]

Markscheme

Any of:
ductility ✔
strength/resistance to deformation ✔
malleability ✔
hardness ✔
resistance to corrosion/chemical resistance ✔
range of working temperatures ✔
density ✔


Do not accept “conductivity”.

Examiners report

This was a very popular option with approximately 34% of candidates attempting Option B. Many students appeared well prepared for this option. Some candidates continue to provide answers with a heavy Biology bias that often make them lose valuable points.

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