DP Chemistry (last assessment 2024)
Question 20N.2.hl.TZ0.d(vi)
| Date | November 2020 | Marks available | [Maximum mark: 1] | Reference code | 20N.2.hl.TZ0.d(vi) |
| Level | hl | Paper | 2 | Time zone | TZ0 |
| Command term | Suggest | Question number | d(vi) | Adapted from | N/A |
d(vi).
[Maximum mark: 1]
20N.2.hl.TZ0.d(vi)
Nickel catalyses the conversion of propanone to propan-2-ol.
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
Almost all candidates could correctly identify a physical property of a metal which might be altered when alloying.
