DP Chemistry (last assessment 2024)

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Question 20N.2.sl.TZ0.4d(iv)

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.2.sl.TZ0.4d(iv)
Level sl Paper 2 Time zone TZ0
Command term Suggest Question number d(iv) Adapted from N/A
d(iv).
[Maximum mark: 1]
20N.2.sl.TZ0.4d(iv)

Nickel catalyses the conversion of propanone to propan-2-ol.

(d(iv))

Nickel alloys are used in aircraft gas turbines. Suggest a physical property altered by the addition of another metal to nickel.

[1]

Markscheme

Any of:

malleability/hardness
OR
«tensile» strength/ductility
OR
density
OR
thermal/electrical conductivity
OR
melting point
OR
thermal expansion ✔


Do not accept corrosion/reactivity or any chemical property.

Accept other specific physical properties.

Examiners report

80% obtained the mark. Many candidates wrote more than one property, which should be discouraged. Incorrect answers included chemical properties such as reactivity.

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