DP Chemistry (last assessment 2024)

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Question 18M.3.sl.TZ1.3b.ii

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.3.sl.TZ1.3b.ii
Level sl Paper 3 Time zone TZ1
Command term State Question number b.ii Adapted from N/A
b.ii.
[Maximum mark: 1]
18M.3.sl.TZ1.3b.ii

Aluminium and high density polyethene (HDPE) are both materials readily found in the kitchen, for example as saucepans and mixing bowls respectively. In these applications it is important that they are impermeable to water.

Both materials are also used in other applications that are more demanding of their physical properties. Carbon nanotubes are often incorporated into their structures to improve certain properties.

(b.ii)

State one physical property of HDPE that will be affected by the incorporation of carbon nanotubes.

[1]

Markscheme

melting point

OR

permeability

OR

density

OR

conductivity

OR

elasticity/stiffness

OR

brittleness/flexibility

OR

«tensile» strength

 

Accept “colour/transparency”.

[1 mark]

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