DP Chemistry (last assessment 2024)

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Question 20N.2.hl.TZ0.4d(v)

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

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

(d(v))

Describe the bonding in metals.

[2]

Markscheme

electrostatic attraction ✔

between «a lattice of» metal/positive ions/cations AND «a sea of» delocalized electrons ✔

Accept “mobile/free electrons”.

Examiners report

Most candidates were aware that metallic bonding involved a "sea of electrons", but were unsure about surrounding what and could not identify that it was electrostatic attraction holding the metal together.

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